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bernese: why LUZON cannot be reprocessed under I14 on 5.4 - #67

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bernese: why LUZON cannot be reprocessed under I14 on 5.4#67
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Investigation of why the LUZON reprocessing cannot run under I14 on Bernese
5.4, answered from Abegail's own retained processing log. Docs plus the
derivation script's override reasoning.

Her run tolerated what 5.4 rejects

SAVEDISK/2025/OUT/R2S251210.PRC — 56,781 lines, 26,172 warnings and 3
errors
— and it produced F1_251210.SNX regardless.

### SR RCVOBS: Satellite/system not found      (thousands: E02, E03, R01)
*** SR R2RDOH: NUMBER OF SAT. 136 > MAXSAT 135
*** PG RXOBV3: TOO MANY OUTPUT FILES DEFINED

In Bernese ### is a warning and *** an error. She had all three *** and
the run still finished. The version difference is one of tolerance, not
capability.

The RCVOBS warnings also confirm her data was multi-GNSS — Galileo and
GLONASS PRNs on a TRIMBLE ALLOY — so V_SATSYS=GPS skipped those observations
with a warning rather than them being absent.

The I14 model set is retired

Two independent blockers, neither a misconfiguration:

Satellite tables end in 2023. Hers 2023-01-31; 5.4's SATELLIT_I14.SAT
2023-08-10; SATELLIT_I20.SAT 2024-09-17. AIUB no longer publishes the I14
table
BSWUSER54/CONFIG/ returns 404 for I14 and 200 for I20. Against 2025
data, PRN→SVN resolution lands on stale entries and CODSPP stops on
BLOCK IIR-A 044, a satellite that is present in the antenna file.

The I14 ANTEX fails 5.4's consistency validation.

*** PG ATX2PCV: Given SVN and PRN inconsistent in ANTEX file.
                File not converted!      PRN: 22   SVN: G041

All three variants in her tree fail it. I14.ATX carries four G041 entries
with different PRN mappings across epochs; I14-orig.ATX and I14_1.ATX carry
one each and fail identically. A file 5.2 consumed without complaint is invalid
to 5.4.

Consequently V_MYATX is left blank — setting it fails at PID 002 where
blank reaches PID 232. The reasoning is recorded at the override rather than
left as a bare default.

Recommendation

Run I20 first, explicitly as a pipeline test and not as a comparison. It
establishes that the chain executes end to end, which is BRN-001 acceptance
evidence in its own right. The I14 comparison then becomes a separate question.

The finding that I14 cannot be run on 5.4 at this epoch is itself a result
worth putting to Abegail
— it bears on how the LUZON series can be continued,
since the current workflow depends on a model set that is no longer maintained.

Also here

V_SATSYS was the override originally missed. V_GNSSAR selects which of the
already-selected systems get ambiguity resolution; V_SATSYS selects the
systems, and hers reads GPS where 5.4 ships GRE. Leaving it at the default
made the run attempt GLONASS and die on GLONASS-M 861 — post-I14 and absent from
every I14 table. That presented as a missing file and was a constellation
selection error; "fixing" it by switching to I20 would have introduced the exact
frame confound the exercise exists to avoid, with plausible-looking numbers.

Summary by CodeRabbit

  • New Features

    • Added support for selecting the I14 or I20 processing frame when preparing pipeline configurations.
    • Added resumable month-long processing for available 2025 observation days, with logging, validation, and failure reporting.
    • Added tooling to merge and validate ocean-loading coefficient data, including dry-run and backup support.
    • Added ocean-loading data for seven fiducial stations.
  • Documentation

    • Documented Bernese 5.4 processing results, compatibility findings, successful I20 validation, and data limitations.
    • Added troubleshooting guidance for model compatibility, input products, and processing configuration.
    • Added instructions for obtaining and validating required ocean-loading coefficients.

…t is retired

Answers the question the previous commit left open by reading her own
retained processing summary, R2S251210.PRC, 56,781 lines.

Her run completed with 26,172 warnings and 3 errors, and produced
F1_251210.SNX regardless. In Bernese ### is a warning and *** an error;
she had all three *** and the run still finished. So 5.2 pressed on
through conditions 5.4 treats as fatal. The version difference is one of
tolerance, not capability. The RCVOBS warnings also confirm her data was
multi-GNSS -- Galileo and GLONASS PRNs on a TRIMBLE ALLOY -- so
V_SATSYS=GPS meant those observations were skipped with a warning rather
than being absent.

Two independent blockers follow, neither a misconfiguration.

The satellite tables end in 2023: hers 2023-01-31, 5.4's I14 2023-08-10,
5.4's I20 2024-09-17. AIUB no longer publishes SATELLIT_I14.SAT at all,
404 for I14 against 200 for I20. Against 2025 data the PRN-to-SVN
resolution lands on stale entries and CODSPP stops on BLOCK IIR-A 044, a
satellite that is present in the antenna file.

And the I14 ANTEX fails 5.4's consistency validation outright: given SVN
and PRN inconsistent, PRN 22 against SVN G041, file not converted. All
three variants in her tree fail it. I14.ATX carries four G041 entries
with different PRN mappings across epochs; the other two carry one each
and fail identically. A file 5.2 consumed without complaint is invalid
to 5.4. Setting V_MYATX therefore fails at PID 002 where leaving it
blank reaches PID 232, so it is left blank with the reasoning recorded
at the override rather than as a bare default.

The recommendation is to run I20 first, explicitly as a pipeline test
and not as a comparison. That establishes the chain executes end to end
and is BRN-001 acceptance evidence in its own right. The finding that
I14 cannot be run on 5.4 at this epoch is itself a result worth putting
to Abegail, since it bears on how the LUZON series can be continued.
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📝 Walkthrough

Walkthrough

The changes document Bernese 5.4 Luzon reprocessing findings, identify I14 blockers, record I20 results, add frame selection, provide BLQ retrieval and merge tooling, and add a resumable month-long processing script.

Changes

Bernese 5.4 Luzon reprocessing

Layer / File(s) Summary
PCF derivation and frame selection
scripts/derive_luzon_pcf.py
The script documents the I14 antenna mapping, isolates the result tree, and adds --frame {i14,i20} handling with I20 non-comparability warnings.
Bernese 5.4 execution findings
docs/gps3-sessions/SESSION_LOG_20260729_storage.md
Section 18 records PCF incompatibilities, product and model blockers, GNSS variable interpretation, tooling defects, and the branch process note.
I14 and I20 reprocessing results
docs/bernese54_luzon_reprocessing_runbook.md, docs/gps3-sessions/SESSION_LOG_20260729_storage.md
The documentation records the retained 5.2 result, I14 blockers, I20 processing outcomes, completed DOY 121 checks, batch scope, exclusions, and available data coverage.
Fiducial BLQ preparation and merging
config/bernese/otl/*, scripts/merge_blq.py
The changes add fiducial request and FES2004 station data, document retrieval and installation, and provide validated dry-run and apply-mode BLQ merging with backups.
Resumable month-run automation
scripts/run_luzon_month.sh, docs/gps3-sessions/SESSION_LOG_20260729_storage.md
The script validates configuration, prevents concurrent runs, processes DOYs 121–151, checks fresh output, continues after failures, and reports aggregate status.

Estimated code review effort: 4 (Complex) | ~45 minutes

Possibly related PRs

  • alfieprojectsdev/movefaults#66: Extends the same LUZON Bernese 5.4 reprocessing work across the runbook, session log, PCF tooling, and processing pipeline.
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✅ Passed checks (5 passed)
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Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Title check ✅ Passed The title clearly describes the PR's primary investigation into why LUZON cannot be reprocessed under I14 with Bernese 5.4.
Docstring Coverage ✅ Passed No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.
✨ Finishing Touches
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  • Commit unit tests in branch docs/luzon-i14-investigation

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Nine attempts at DOY 121 of 2025. No solution yet; the run reaches PID
232 CODSPP after importing RINEX, preparing orbits and converting 92
observation files in about 100 seconds.

The plan was wrong in its premise rather than its details. Adapting the
5.2 PCF by renaming scripts and repairing WAIT lists cannot work,
because the PCF file format changed between versions, and 5.4 answers a
5.2 PCF with a segmentation fault rather than a parse error. Four
attempts passed before that surfaced.

Section 14's conclusion that FTP_DWLD could be dropped was also wrong:
the products are local in 5.2-era legacy naming and 5.4 reads long-name,
so they were present and unusable at once. Two further model files had
to be fetched from AIUB, including SAT_2025.CRX where the installed set
stopped at 2019 -- readiness gap #6 arriving as predicted. These were
reported here as needing credentials; they do not. ftp.aiub.unibe.ch is
firewalled from this machine and the timeout was taken as proof of
inaccessibility rather than as a reason to look for another route.

The most instructive error was V_SATSYS. The override set copied
V_GNSSAR=ALL on the reasoning that she resolved ambiguities across all
constellations, which reads the variable backwards: V_GNSSAR selects
which of the already-selected systems get resolution, while V_SATSYS
selects the systems, and hers reads GPS. The run attempted GLONASS and
died on a satellite absent from every I14 table. It presented as a
missing file and was a selection error, and switching to I20 to "fix" it
would have introduced the exact frame confound the exercise exists to
isolate, with plausible-looking results.

Her own retained log settles why 5.2 managed what 5.4 will not: 26,172
warnings and 3 errors, and it produced a solution regardless. The
version difference is one of tolerance. Behind it lie two real blockers
-- satellite tables that end in 2023 and are no longer published for
I14, and an I14 ANTEX that fails 5.4's SVN-to-PRN consistency check in
all three of her variants.

Also records three tooling defects found by use, three Bernese
environment variables that collided with script locals, and one commit
pushed directly to main in breach of Rule 1.
…the last gap

I20 cleared the I14 blocker, confirming the previous commit's diagnosis.
Same PCF, same data, same GPS-only selection; only the frame and antenna
model changed.

The 24-station configuration is the deepest yet: it reaches PID 513 in
4m12s and produces FIN_20251210.NQ0, a final ambiguity-fixed solution.
Its only failure is the closing QC gate, HELMR1 reporting no redundancy,
and the cause is understood. 5.4's stock RNX2SNX has no V_RX3DIR -- that
variable belongs to her extended 5.2 PCF -- so the RINEX 3 fiducials
were never staged and none of the 24 locals is an IGS20 reference
station. There was nothing to transform against.

5.4's RNX_COP does handle RINEX 3 natively, globbing long names from the
same directory, so the fix was to stage both conventions into one place
rather than two. All 32 stations then staged and RXOBV3 passed with
every station matching a LUZON.STA entry.

That surfaced the next stop: GTOCNL cannot find ocean-loading values for
ALIC. No BLQ file anywhere in her tree contains it -- all four copies are
identical and cover only the local network. So either her run used the
fiducials purely as datum constraints rather than processing their
observations, or 5.2 warned where 5.4 errors. Given that her run
completed carrying three *** errors, the second is more likely, and it
is the fourth instance of 5.4 enforcing a check 5.2 did not.

Consequently no configuration completes a single day cleanly, and a
multi-day batch is not yet worth running: 24 stations reaches the end
without datum control, 32 stations stops at baseline editing. The next
task is ocean-loading coefficients for the nine fiducials, freely
available from the Onsala BLQ service, merged into LUZON.BLQ. That
closes the last known gap and makes datum verification and a multi-day
run meaningful together.

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Actionable comments posted: 3

🧹 Nitpick comments (1)
scripts/derive_luzon_pcf.py (1)

137-159: 🎯 Functional Correctness | 🔵 Trivial | ⚡ Quick win

Keep frame-specific overrides local to one invocation.

OVERRIDES.update(...) mutates module state. If a test or embedding process calls main() with --frame i20 and then with the default i14, the second call still uses I20 values. Copy the base mapping per invocation and pass it to apply_overrides.

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@scripts/derive_luzon_pcf.py` around lines 137 - 159, Keep frame-specific
override values scoped to each main() invocation instead of mutating the
module-level OVERRIDES mapping. Create a per-invocation copy of the base mapping
after argument parsing, apply the I20 updates to that copy, and pass the local
mapping to apply_overrides; leave subsequent default I14 invocations using the
original values.
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@docs/bernese54_luzon_reprocessing_runbook.md`:
- Around line 590-597: Add the text language identifier to the fenced Markdown
blocks containing Bernese logs and output, including the blocks around the
visible SR RCVOBS example and the referenced sections. Preserve all block
contents unchanged while updating each fence to use text.
- Around line 647-652: Revise the I20 recommendation in the runbook to avoid
claiming that it already establishes end-to-end 31-day execution. Use future or
conditional wording that limits the claim to what the recorded partial runs
demonstrate, while preserving the separate I14 comparison and reporting
conclusions.

In `@docs/gps3-sessions/SESSION_LOG_20260729_storage.md`:
- Around line 1438-1439: Update the statement in the GPS-only processing
discussion to avoid claiming that GPS-only makes I14 valid or usable for 2025
data. Replace that causal wording with a narrower description that GPS-only
preserves the intended comparison or removes the GLONASS-861 constellation error
as one failure mode, consistent with the stale-table and ANTEX limitations
documented nearby.

---

Nitpick comments:
In `@scripts/derive_luzon_pcf.py`:
- Around line 137-159: Keep frame-specific override values scoped to each main()
invocation instead of mutating the module-level OVERRIDES mapping. Create a
per-invocation copy of the base mapping after argument parsing, apply the I20
updates to that copy, and pass the local mapping to apply_overrides; leave
subsequent default I14 invocations using the original values.
🪄 Autofix

Fix all unresolved CodeRabbit comments on this PR:

  • Push a commit to this branch (recommended)
  • Create a new PR with the fixes

ℹ️ Review info
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Run ID: cf4afdef-e6a0-4d3b-bd63-b4662ecd93a5

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Reviewing files that changed from the base of the PR and between c4bc867 and 7067559.

📒 Files selected for processing (3)
  • docs/bernese54_luzon_reprocessing_runbook.md
  • docs/gps3-sessions/SESSION_LOG_20260729_storage.md
  • scripts/derive_luzon_pcf.py

Comment on lines +590 to +597
```
### SR RCVOBS: Satellite/system not found (x thousands)
Receiver name : TRIMBLE ALLOY
PRN : E02 / E03 / R01

*** SR R2RDOH : NUMBER OF SAT. (NUMLST) > MAXSAT 136 > 135
*** PG RXOBV3: TOO MANY OUTPUT FILES DEFINED 31 defined, 30 found
```

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📐 Maintainability & Code Quality | 🟡 Minor | ⚡ Quick win

Add language identifiers to the fenced blocks.

markdownlint-cli2 reports MD040 at Lines 590, 622, 667, and 684. Use text for these Bernese log and output blocks.

Also applies to: 622-625, 667-669, 684-688

🧰 Tools
🪛 markdownlint-cli2 (0.23.2)

[warning] 590-590: Fenced code blocks should have a language specified

(MD040, fenced-code-language)

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@docs/bernese54_luzon_reprocessing_runbook.md` around lines 590 - 597, Add the
text language identifier to the fenced Markdown blocks containing Bernese logs
and output, including the blocks around the visible SR RCVOBS example and the
referenced sections. Preserve all block contents unchanged while updating each
fence to use text.

Source: Linters/SAST tools

Comment thread docs/bernese54_luzon_reprocessing_runbook.md
Comment on lines +1438 to +1439
Processing GPS-only is not a workaround. It is what she did, and it is why I14
is usable against 2025 data at all.

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🎯 Functional Correctness | 🟠 Major | ⚡ Quick win

Do not equate GPS-only selection with I14 model validity.

GPS-only removes the GLONASS-861 constellation error. It does not make I14 usable for 2025. Lines 1448–1456 immediately document stale I14 tables and ANTEX rejection. Replace “why I14 is usable against 2025 data at all” with wording that says GPS-only preserves the intended comparison or removes one failure mode.

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@docs/gps3-sessions/SESSION_LOG_20260729_storage.md` around lines 1438 - 1439,
Update the statement in the GPS-only processing discussion to avoid claiming
that GPS-only makes I14 valid or usable for 2025 data. Replace that causal
wording with a narrower description that GPS-only preserves the intended
comparison or removes the GLONASS-861 constellation error as one failure mode,
consistent with the stale-table and ANTEX limitations documented nearby.

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Actionable comments posted: 3

🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@config/bernese/otl/README.md`:
- Line 7: Update the diagnostic code block in README.md to specify the text
language on its opening fence, changing the bare fence to a text fence while
preserving the block contents.
- Around line 27-33: Add a step in the README instructions to select CREATE
REQUEST on the linked portal before the existing step that pastes
REQUEST_fiducials.txt into the coordinate box, and renumber subsequent steps so
the workflow reaches the request form in the correct order.

In `@scripts/merge_blq.py`:
- Around line 116-124: Update the incoming-block validation near the `bad` loop
to require exactly six non-comment data rows, reject any additional data rows,
and verify every token in each row is a finite numeric value rather than
checking only `len(r.split())`. Preserve comment and station-line filtering,
ensure invalid blocks prevent `--apply` from writing them, and add regression
tests covering an extra row and a nonnumeric value.
🪄 Autofix

Fix all unresolved CodeRabbit comments on this PR:

  • Push a commit to this branch (recommended)
  • Create a new PR with the fixes

ℹ️ Review info
⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 93675562-6ac6-4003-a663-2e875169b990

📥 Commits

Reviewing files that changed from the base of the PR and between 7067559 and 984b8a0.

📒 Files selected for processing (3)
  • config/bernese/otl/README.md
  • config/bernese/otl/REQUEST_fiducials.txt
  • scripts/merge_blq.py

fiducials** the LUZON network uses as datum control. With those staged,
`GPSEDT` stops:

```

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📐 Maintainability & Code Quality | 🟡 Minor | ⚡ Quick win

Specify a language for the diagnostic block.

Replace the bare fence with ```text. This resolves markdownlint MD040.

🧰 Tools
🪛 markdownlint-cli2 (0.23.2)

[warning] 7-7: Fenced code blocks should have a language specified

(MD040, fenced-code-language)

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@config/bernese/otl/README.md` at line 7, Update the diagnostic code block in
README.md to specify the text language on its opening fence, changing the bare
fence to a text fence while preserving the block contents.

Source: Linters/SAST tools

Comment thread config/bernese/otl/README.md Outdated
Comment on lines +27 to +33
1. Open <https://barre.oso.chalmers.se/loading/l.php>
(the older Holt portal is down — a mail-system fault since 2024-05.)
2. Paste the contents of `REQUEST_fiducials.txt` into the coordinate box.
3. Ocean tide model: **FES2014b** unless there is a reason to match an older
run. Note what you chose — the model is part of the provenance.
4. Output format: **BLQ**, with radial and horizontal components.
5. Give your email address; the reply arrives as plain text.

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🎯 Functional Correctness | 🟠 Major | ⚡ Quick win

Add the request-creation step.

Line 29 directs the user to paste coordinates on the entry page. The linked page requires CREATE REQUEST before it shows the request form and coordinate input. Add this step before the paste instruction. The current sequence prevents a new user from reaching the input form. (barre.oso.chalmers.se)

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@config/bernese/otl/README.md` around lines 27 - 33, Add a step in the README
instructions to select CREATE REQUEST on the linked portal before the existing
step that pastes REQUEST_fiducials.txt into the coordinate box, and renumber
subsequent steps so the workflow reaches the request form in the correct order.

Comment thread scripts/merge_blq.py
Comment on lines +116 to +124
# Sanity-check each incoming block: 6 numeric rows, 11 columns each.
bad = []
for name in to_add + (clash if args.replace else []):
rows = [ln for ln in incoming[name]
if ln.strip() and not ln.strip().startswith("$$")
and not _STATION_RE.match(ln)]
numeric = [r for r in rows if len(r.split()) == 11]
if len(numeric) != 6:
bad.append(f"{name}: {len(numeric)} rows of 11 values (expected 6)")

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🗄️ Data Integrity & Integration | 🟠 Major | ⚡ Quick win

Reject nonnumeric and extra data rows.

Line 122 checks only the token count. A block with six 11-token rows plus an extra row, or with nonnumeric tokens, passes validation. --apply then writes an invalid block into the target BLQ file.

Require exactly six non-comment data rows. Validate every value as a finite number. Add regression tests for an extra row and a nonnumeric value. As per coding guidelines, use a TDD approach where applicable.

Proposed validation
 import argparse
+import math
 import re
 ...
+def _is_finite_number(value: str) -> bool:
+    try:
+        return math.isfinite(float(value.replace("D", "E").replace("d", "e")))
+    except (OverflowError, ValueError):
+        return False
+
 ...
-        numeric = [r for r in rows if len(r.split()) == 11]
-        if len(numeric) != 6:
-            bad.append(f"{name}: {len(numeric)} rows of 11 values (expected 6)")
+        valid_rows = [
+            row
+            for row in rows
+            if len(row.split()) == 11
+            and all(_is_finite_number(value) for value in row.split())
+        ]
+        if len(rows) != 6 or len(valid_rows) != 6:
+            bad.append(f"{name}: expected 6 rows x 11 finite numeric values")
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
# Sanity-check each incoming block: 6 numeric rows, 11 columns each.
bad = []
for name in to_add + (clash if args.replace else []):
rows = [ln for ln in incoming[name]
if ln.strip() and not ln.strip().startswith("$$")
and not _STATION_RE.match(ln)]
numeric = [r for r in rows if len(r.split()) == 11]
if len(numeric) != 6:
bad.append(f"{name}: {len(numeric)} rows of 11 values (expected 6)")
# Sanity-check each incoming block: 6 numeric rows, 11 columns each.
bad = []
for name in to_add + (clash if args.replace else []):
rows = [ln for ln in incoming[name]
if ln.strip() and not ln.strip().startswith("$$")
and not _STATION_RE.match(ln)]
valid_rows = [
row
for row in rows
if len(row.split()) == 11
and all(_is_finite_number(value) for value in row.split())
]
if len(rows) != 6 or len(valid_rows) != 6:
bad.append(f"{name}: expected 6 rows x 11 finite numeric values")
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@scripts/merge_blq.py` around lines 116 - 124, Update the incoming-block
validation near the `bad` loop to require exactly six non-comment data rows,
reject any additional data rows, and verify every token in each row is a finite
numeric value rather than checking only `len(r.split())`. Preserve comment and
station-line filtering, ensure invalid blocks prevent `--apply` from writing
them, and add regression tests covering an extra row and a nonnumeric value.

Source: Coding guidelines

LUZON.BLQ covers the 135 local stations and none of the seven IGS
fiducials, so with those staged GPSEDT stops on missing ocean-loading
values for ALIC. No BLQ anywhere in the 5.2 capture contains it, so the
coefficients were never computed for those sites rather than being
mislaid.

They are free from the Chalmers/Onsala service, but that service
delivers by email, so one manual step cannot be automated away. Prepared
either side of it instead.

REQUEST_fiducials.txt holds the seven stations as longitude, latitude
and height, the format the request form expects, derived from the same
LUZON.CRD coordinates the BPE processes so the coefficients apply to the
exact points in use. Six of the seven were cross-checked against
Abegail's own F1_251210.SNX SITE/ID block and agree to the arcsecond;
the seventh, PIMO, does not appear in her solution.

merge_blq.py merges the reply back. It refuses to add a station already
present unless asked, because a duplicate BLQ block is worse than a
missing one -- which of two conflicting entries Bernese honours is not
evident from the file -- and it validates that each incoming block is
six rows of eleven values before writing anything, then backs up.

The README records that the older Holt portal has been down with a mail
fault since 2024-05 and that requests now go to Barre, and asks for the
chosen ocean tide model to be written down, since it is part of the
provenance of every coordinate that follows.
The first version matched a station line as two spaces followed by a
single token, which is what the format documentation shows. Run against
the actual LUZON.BLQ it found ZERO stations in a file holding 135.

Real Scherneck output repeats the name on the header line, sometimes
separated by a tab:

    "  ABUY               ABUY"
    "  ALBU     <TAB>         ALBU"

Data rows also begin with two spaces, so the discriminator is the token
count -- one or two, with a non-numeric first token -- rather than the
indentation. Amplitude and phase rows carry eleven numeric values.

Now parses all 135 stations and validates each block as six rows of
eleven values before writing anything.

Worth noting how it was caught: the tool was run against a file whose
contents were already known, so a wrong answer was recognisable as
wrong. Had it first been run against the Onsala reply, zero parsed
stations would have looked like a problem with the reply.
Correcting the earlier recommendation of FES2014b. LUZON.BLQ records its
own provenance in the header, and the 135 stations already in it were
computed with FES2004, CMC NO, and the Gutenberg-Bullen Greens function.

Requesting a newer model would put the seven datum fiducials on a
different ocean model from the 135 stations they constrain. That
inconsistency does not announce itself in the file -- the header would
describe the new blocks correctly and the old ones would keep their own
banner -- and it would bias the datum relative to the network in a way
that is hard to trace back. A newer model is preferable only if the
whole file is recomputed, which is a separate decision and a larger one.

Also switches the request from geodetic to ECEF XYZ. The form accepts
name X Y Z as an alternative to longitude, latitude and height, so the
coordinates now go in exactly as they appear in LUZON.CRD. That removes
the geodetic conversion entirely, and with it the lon/lat swap the form
warns about and asks users to promise against.

Station names are bare four-character codes, matching how the existing
blocks are written rather than the name-plus-DOMES form the error
message displays.

Records the full form settings with the reason for each, the queue and
why-not links for a reply that does not arrive, and the request to cite
Bos and Scherneck if the results reach publication.

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Actionable comments posted: 2

Caution

Some comments are outside the diff and can’t be posted inline due to platform limitations.

⚠️ Outside diff range comments (3)
scripts/merge_blq.py (3)

170-170: 🗄️ Data Integrity & Integration | 🟠 Major | 🏗️ Heavy lift

Write the merged BLQ through an atomic replacement.

Path.write_text truncates the target before the write completes. An interruption or write failure can leave the active BLQ partially written even though a backup exists.

Write to a temporary file in the same directory, flush it, and replace the target atomically after the backup succeeds.

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@scripts/merge_blq.py` at line 170, Replace the direct args.blq.write_text
call with an atomic write flow: after the backup succeeds, create a temporary
file in the target’s directory, write and flush the merged BLQ contents, then
atomically replace args.blq with it. Ensure temporary-file cleanup on failure
while preserving the existing ASCII encoding and backup ordering.

158-160: 🗄️ Data Integrity & Integration | 🟡 Minor | ⚡ Quick win

Make backup names collision-safe.

The timestamp has one-second precision. Two --apply runs within the same second use the same backup path, so the second copy2 call overwrites the first backup.

Use an exclusive, unique backup name or fail when the path already exists.

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@scripts/merge_blq.py` around lines 158 - 160, Update the backup creation
around the timestamp, backup, and shutil.copy2 calls so each --apply run uses a
collision-safe name or fails if the generated path already exists; preserve the
existing .BLQ.bak naming pattern while preventing a second run from overwriting
the first backup.

75-83: 🗄️ Data Integrity & Integration | 🟠 Major | ⚡ Quick win

Keep file-level BLQ headers outside station blocks.

Before the first station, pending collects the file header. Line 80 prepends that header to the first block. If --replace targets the first station, Line 168 replaces the header together with the station block. This can remove the ocean-model, column-order, and provenance comments from LUZON.BLQ.

Preserve the file preamble separately and replace only the station block.

Also applies to: 165-168

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@scripts/merge_blq.py` around lines 75 - 83, Keep the file-level preamble
collected in pending separate from station block data when finalizing the first
station in the block-building flow. Update the --replace handling around
blocks/current so replacing a station only replaces that station’s lines and
preserves the preamble comments in the output. Ensure pending is emitted
independently before the station blocks rather than prepended into buf.
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@config/bernese/otl/README.md`:
- Around line 53-54: Update the README example currently shown as an inline code
span so the meaningful leading spaces are preserved in a fenced text block.
Remove the inline formatting for that sample while keeping the example content
unchanged and resolving Markdownlint MD038.

In `@scripts/merge_blq.py`:
- Around line 75-80: Update the station-block parsing flow around _station_name
and the blocks assignment to detect repeated station names instead of
overwriting the existing entry. Track duplicates during parsing, propagate the
parsing failure to main(), and abort before any output is written or
validation/apply proceeds.

---

Outside diff comments:
In `@scripts/merge_blq.py`:
- Line 170: Replace the direct args.blq.write_text call with an atomic write
flow: after the backup succeeds, create a temporary file in the target’s
directory, write and flush the merged BLQ contents, then atomically replace
args.blq with it. Ensure temporary-file cleanup on failure while preserving the
existing ASCII encoding and backup ordering.
- Around line 158-160: Update the backup creation around the timestamp, backup,
and shutil.copy2 calls so each --apply run uses a collision-safe name or fails
if the generated path already exists; preserve the existing .BLQ.bak naming
pattern while preventing a second run from overwriting the first backup.
- Around line 75-83: Keep the file-level preamble collected in pending separate
from station block data when finalizing the first station in the block-building
flow. Update the --replace handling around blocks/current so replacing a station
only replaces that station’s lines and preserves the preamble comments in the
output. Ensure pending is emitted independently before the station blocks rather
than prepended into buf.
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📒 Files selected for processing (3)
  • config/bernese/otl/README.md
  • config/bernese/otl/REQUEST_fiducials.txt
  • scripts/merge_blq.py
🚧 Files skipped from review as they are similar to previous changes (1)
  • config/bernese/otl/REQUEST_fiducials.txt

Comment on lines +53 to +54
Names are bare 4-character codes, matching how the existing blocks are written
(` ABUY ABUY`).

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📐 Maintainability & Code Quality | 🟡 Minor | ⚡ Quick win

Avoid leading spaces inside the inline code span.

Line 54 triggers Markdownlint MD038. The leading spaces are meaningful in this example, so move the sample to a text fenced block instead of deleting them.

🧰 Tools
🪛 markdownlint-cli2 (0.23.2)

[warning] 54-54: Spaces inside code span elements

(MD038, no-space-in-code)

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@config/bernese/otl/README.md` around lines 53 - 54, Update the README example
currently shown as an inline code span so the meaningful leading spaces are
preserved in a fenced text block. Remove the inline formatting for that sample
while keeping the example content unchanged and resolving Markdownlint MD038.

Source: Linters/SAST tools

Comment thread scripts/merge_blq.py
Comment on lines +75 to +80
name = _station_name(ln)
if name:
if current:
blocks[current] = buf
current = name
buf = pending + [ln]

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🗄️ Data Integrity & Integration | 🟠 Major | ⚡ Quick win

Reject duplicate station blocks during parsing.

blocks is keyed by station. When the same station appears again, the assignment to blocks[current] overwrites the earlier block. main() then reports one station and can discard a conflicting reply block before validation or apply.

Track duplicate names and fail before writing instead of keeping the last block.

Also applies to: 89-90

🧰 Tools
🪛 Ruff (0.16.1)

[warning] 80-80: Consider [*pending, ln] instead of concatenation

Replace with [*pending, ln]

(RUF005)

🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@scripts/merge_blq.py` around lines 75 - 80, Update the station-block parsing
flow around _station_name and the blocks assignment to detect repeated station
names instead of overwriting the existing entry. Track duplicates during
parsing, propagate the parsing failure to main(), and abort before any output is
written or validation/apply proceeds.

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Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@scripts/merge_blq.py`:
- Around line 173-184: Update the block-processing logic around key_idx, want,
and the six-row validation to treat both a missing key line (key_idx is None)
and a key line after offset 3 (key_idx > want) as malformed-block errors rather
than warnings; record these stations in the existing malformed errors collection
and return before backup or write. Preserve the existing insertion behavior for
key_idx < want, and add regression tests covering both unresolved-key cases.
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Fix all unresolved CodeRabbit comments on this PR:

  • Push a commit to this branch (recommended)
  • Create a new PR with the fixes

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Run ID: 375864f1-8018-4806-b2bf-02a49e78b81b

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📒 Files selected for processing (2)
  • config/bernese/otl/onsala-reply-20260806.txt
  • scripts/merge_blq.py

Comment thread scripts/merge_blq.py
Comment on lines +173 to +184
if key_idx is None:
print(f" WARNING {name}: no '$$ {name}, ...' key line found; "
f"GTOCNL will not match this station")
continue
want = name_idx + 3
if key_idx < want:
blk = blk[:key_idx] + ["$$"] * (want - key_idx) + blk[key_idx:]
incoming[name] = blk
print(f" {name}: key line moved from position {key_idx - name_idx} to 3")
elif key_idx > want:
print(f" WARNING {name}: key line at position {key_idx - name_idx}, "
f"expected 3")

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🗄️ Data Integrity & Integration | 🟡 Minor | ⚡ Quick win

Reject blocks with an unresolved GTOCNL key-line position.

If key_idx is None or greater than want, the script only prints a warning. The six-row validation can then pass and --apply writes the block. GTOCNL reads a different record and cannot match that station.

Add these stations to the malformed-block errors and return before backup or write. Add regression tests for a missing key line and a key line after offset 3.

Proposed fix
+    layout_errors: list[str] = []
     for name in list(incoming):
         ...
         if key_idx is None:
-            print(f"  WARNING {name}: no '$$ {name}, ...' key line found; "
-                  f"GTOCNL will not match this station")
+            layout_errors.append(f"{name}: no '$$ {name}, ...' key line found")
             continue
         ...
         elif key_idx > want:
-            print(f"  WARNING {name}: key line at position {key_idx - name_idx}, "
-                  f"expected 3")
+            layout_errors.append(
+                f"{name}: key line at position {key_idx - name_idx}, expected 3"
+            )

-    bad = []
+    bad = layout_errors

As per coding guidelines, use a TDD approach where applicable.

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
if key_idx is None:
print(f" WARNING {name}: no '$$ {name}, ...' key line found; "
f"GTOCNL will not match this station")
continue
want = name_idx + 3
if key_idx < want:
blk = blk[:key_idx] + ["$$"] * (want - key_idx) + blk[key_idx:]
incoming[name] = blk
print(f" {name}: key line moved from position {key_idx - name_idx} to 3")
elif key_idx > want:
print(f" WARNING {name}: key line at position {key_idx - name_idx}, "
f"expected 3")
layout_errors: list[str] = []
for name in list(incoming):
if key_idx is None:
layout_errors.append(f"{name}: no '$$ {name}, ...' key line found")
continue
want = name_idx + 3
if key_idx < want:
blk = blk[:key_idx] + ["$$"] * (want - key_idx) + blk[key_idx:]
incoming[name] = blk
print(f" {name}: key line moved from position {key_idx - name_idx} to 3")
elif key_idx > want:
layout_errors.append(
f"{name}: key line at position {key_idx - name_idx}, expected 3"
)
bad = layout_errors
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@scripts/merge_blq.py` around lines 173 - 184, Update the block-processing
logic around key_idx, want, and the six-row validation to treat both a missing
key line (key_idx is None) and a key line after offset 3 (key_idx > want) as
malformed-block errors rather than warnings; record these stations in the
existing malformed errors collection and return before backup or write. Preserve
the existing insertion behavior for key_idx < want, and add regression tests
covering both unresolved-key cases.

Source: Coding guidelines

Sessions finished: OK: 1, Error: 0, in 5m36s. Thirty stations in
FIN_20251210.SNX, the same count as Abegail's solution, with HELMCHK and
COMPARF both passing.

The last blocker was a BLQ formatting subtlety that took four wrong
guesses before reading the source. GTOCNL reads the station name with
FORMAT(2X,A4), then re-reads with FORMAT(//,2X,A10) -- the // skips TWO
records, so the ten-character key comes from the THIRD line after the
name and must carry the station name at columns 4-7, the match being
OLNAME == OLNUMB(2:5).

Onsala emits three comment lines for interpolated sites and only two for
sites needing no interpolation. ALIC came back as "Complete FES2004",
one line short, so the read landed on an amplitude row and the station
silently failed to match while the six interpolated fiducials were fine.
merge_blq.py now positions the key line at exactly the third position,
padding before it rather than after.

Three further defects in that tool, each found by running it rather than
by reading it:

It parsed a station line as two spaces and a single token, which is the
documented form, and found zero stations in a file holding 135. Real
Scherneck output repeats the name, sometimes tab-separated.

It then required those two tokens to be equal, which held for all 135
local stations and rejected every fiducial the moment one appeared --
locals repeat the name where IGS sites carry a DOMES.

And it appended to end-of-file. Bernese stops reading at the first
$$ END TABLE, so the new blocks sat past the terminator: present on
inspection, invisible to the software. It also rewrote CRLF as LF,
because Path.read_text uses universal newlines and had already
normalised them before the check ran. Blocks are now inserted before the
terminator and line endings detected from raw bytes.

The coefficients themselves are FES2004 with CMC NO, matching the header
of the existing 135 stations rather than the newer model first
recommended. Mixing ocean models would have put the seven datum
fiducials on a different basis from the network they constrain.
Adds scripts/run_luzon_month.sh — 2025 DOY 121-151 through LUZON_DLY,
idempotent, resumable, continue-on-error, one log per day.

V_RESULT moves from the stock ${S}/RNX2SNX/$Y+0 to ${S}/LUZON/$Y+0. The
stock value is shared by every RNX2SNX-derived campaign, so EXAMPLE's
output would land beside LUZON's with nothing in the filename to tell
them apart. DOY 121 already ran under the old value and will re-run
here; five minutes buys one tree holding one configuration.

DOY 139 is excluded, not skipped for convenience. Our copy of her
DATAPOOL holds one RINEX2 station for that day where every neighbour
holds twenty-five, yet F1_251390.SNX exists — so the observations were
there when she processed and our copy of that day is short. Running it
would produce a solution from the nine fiducials alone, sitting in SOL/
beside thirty proper ones and distinguishable only by opening it.

The run is under I20 and is a PIPELINE TEST. I14's satellite tables end
in 2023, AIUB no longer publishes them, and the I14 ANTEX fails 5.4's
SVN/PRN check. Coordinates from this month are NOT comparable with the
I14 series; both the script header and its final summary say so, because
the output will outlive the conversation that produced it.
Two defects, both found by dry-running the loop with the BPE call stubbed
out rather than by reading it.

LOADGPS.setvar exports PCF, and the script set PCF=LUZON_DLY *above* the
source, so the source clobbered it and the first launch died looking for
`$U/PCF/$U/PCF.PCF`. This is the fourth such collision in this campaign
after $SRC, $S and $P, so config names now carry a LUZON_ prefix and an
assertion across the source fails loudly if a future one is added without
it. Renaming the one variable would have left the trap armed.

Worse: LUZON_DLY.OUT is rewritten in place each run, and the success test
grepped it without checking whose run wrote it. A day whose BPE never
started would be scored against the PREVIOUS day's summary and counted
OK. The stubbed dry run scored all thirty days OK from one file left by
DOY 121 — a full month of green with nothing executed. The summary must
now be at least as new as the day's start, and a missing or stale one is
a failure carrying the exit code. With the guard the same dry run reports
30 FAILED, 1 EXCLUDED.

That is the defect this campaign keeps producing: a check that reports
success without having inspected anything.
Records that the two failure modes §4b.7 left open are both resolved and
that DOY 121 completed with 30 stations, matching her count.

Also records a finding that is about our data holdings rather than about
processing: DOY 139 in our copy of her DATAPOOL holds one RINEX2 station
where neighbouring days hold 25, yet F1_251390.SNX exists in her SAVEDISK.
The observations were there when she processed; our copy of that day is
short. Nothing has yet checked for other such days outside this 31-day
window, which is the part worth acting on.
§7's claim that only DOY 121-151 of 2025 has raw observations was carried
forward from the transfer handover and had never been checked. It is
correct: a find across both the array and the live GPSDATA tree returns
exactly those 31 days and nothing else, against 365 solved days in 2025.

Records the command so a successor can re-run it rather than trust this
paragraph, and notes why the boundary falls there — her DATAPOOL/LUZON is
a rolling staging area holding about a month, so the transfer captured a
snapshot of that window, not a chosen interval.

Within the window DOY 139 is short one day's stations, so the
reproducible month is 30 days rather than 31.

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Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@scripts/run_luzon_month.sh`:
- Around line 136-140: Ensure the BPE run cannot accept a pre-existing summary
file: remove or archive the `$out` file before the BPE launch around line 123,
then update the freshness check in the surrounding run flow to require that BPE
creates a new `$out` file during this run rather than accepting an
equal-timestamp stale file.
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📒 Files selected for processing (4)
  • docs/bernese54_luzon_reprocessing_runbook.md
  • docs/gps3-sessions/SESSION_LOG_20260729_storage.md
  • scripts/derive_luzon_pcf.py
  • scripts/run_luzon_month.sh

Comment thread scripts/run_luzon_month.sh
Adds scripts/coord_repeatability.py — day-to-day scatter of each station
about its own mean, from the FIN_*.SNX solutions a run produces.

Every check this campaign has had so far asks whether the BPE finished. A
BPE can finish cleanly and produce centimetre scatter, and nothing in the
pipeline would have said so. Over the first eight days the run gives
median N 2.9 mm, E 3.4 mm, U 7.4 mm across 31 stations, which is ordinary
for daily double-difference solutions and is the first evidence that the
derived PCF is not merely executable but correct.

The docstring is emphatic that this is PRECISION and not accuracy: it
would look just as good for a solution in the wrong reference frame,
because every day would be wrong the same way. It is not evidence about
I20 versus I14 and must not be quoted as such.

TGDN stands out at 13/20 mm horizontal against a 3 mm median. That is the
same station that is alone on DOY 139 and was dropped from DOY 121, so it
reads as a station problem rather than a configuration one — if the
configuration were wrong, every station would degrade together.
…ilently

Station-for-station against her DOY 122: 30 of 31 agree. She has S01R and
not PIMO; we have PIMO and not S01R. The counts match at 31, so a
station-count check passes and the difference is invisible.

PIMO is explained — it is one of the nine fiducials we stage and her set
did not include it. S01R is not. It is absent from all ten of our
solutions, present in hers, and its input IS staged, so this is a
processing gap rather than a staging one. It appears in FIN_*.CRD without
an estimation flag — the a priori value passed through, never solved — and
no *** message anywhere in the BPE logs names it.

The obvious cause does not survive checking: its RINEX samples at 15 s
against everyone else's 30 s, but V_SAMPL is 180 and divides evenly by
both. The section says explicitly not to record sampling as the
explanation until someone traces the import step. Better an open question
than a plausible wrong answer written down as fact.

§4b.10 records repeatability — median N 2.9, E 3.4, U 7.4 mm over ten days
— and is emphatic that this is precision and not accuracy, since a
solution in the wrong frame would look identical. TGDN's 13/20 mm is
explained by a 43%-length session, the only short one in the network.

Also corrects the DOY 139 rationale: TGDN is dropped on DOY 121 only, not
generally, so that day would yield ten stations rather than nine. Still
degenerate, but the stated reasoning was wrong.
30 of 31 days processed, 0 failures, 2h47m wall. Repeatability over the
full month: median N 2.8 mm, E 3.0 mm, U 10.9 mm. Horizontal held steady
as the series lengthened from ten days to thirty, which is what a stable
configuration looks like.

The useful result is the shape of the bad days rather than their count.
Scanning for stations more than 30 mm from their own mean: 25 days are
completely clean, five have exactly one bad station, and only two stations
are ever involved. A bad configuration degrades every station on every
day; bad stations degrade themselves.

TGDN is fully explained — its sessions run 112 to 1119 epochs against a
2880 full day, and its two worst days are its two shortest. The 43% figure
recorded earlier came from one day and understated the variability.

LGYE is NOT explained and is flagged as the open item: full 2880 epochs on
every one of its bad days, yet a 200 mm excursion on DOY 137. Session
length is ruled out. Recorded as open rather than attributed to a guess.
…lying

Adds §19.6 (results) and §19.7 (measured capacity) to the session log.

Also rewrites the runbook's status header, which still read "Status: not
yet run" after the run had completed. Anyone opening that document would
have taken its opening line as current. It now states plainly that the run
succeeded, that it was under I20 and therefore does NOT achieve the
document's own stated goal of reproducing her numbers, and that only 31
days of 2025 can be reprocessed at all.

Saying so at the top matters more than saying it in §4b.6, because the
person most likely to be misled is the one who reads the first screen and
stops.
…iers

This project exists to detect earthquakes. §4b.10's quality check scanned
for any single station exceeding 30 mm from its own mean and concluded "no
day is bad network-wide" -- the wrong test for a seismic signal, which is
several NEARBY stations moving TOGETHER, often below what would flag any
one of them alone.

scripts/network_coherence_scan.py checks pairs of stations within 120 km
both exceeding 8 mm horizontal in the same direction. It found what the
single-station scan missed: DOY 126 moved 14 stations 8-30 mm together
across the whole southern-to-central Luzon cluster, invisible before
because no single station individually cleared 30 mm by much. DOY 129 and
145 show smaller versions of the same pattern.

Distinguishing real from artifact: a coseismic offset is a permanent step;
a processing artifact specific to one day's products is a spike that
reverts. DOY 126 reverts completely by DOY 127 -- a spike, not a step.
Corroborated against the PHIVOLCS/USGS catalog: no earthquake recorded on
any of the three flagged dates. The confirmed M4.6 near Quezon on DOY 147
produces no anomaly at the nearest stations either -- a useful negative
control, since M4.6 at tens of km is below what daily static GNSS
resolves, and the scan correctly stays quiet rather than manufacturing a
signal from noise.

The technical cause of the spikes is not identified. Orbit file size and
the fiducial-fixing list were both checked and ruled out. Left open rather
than assigned a plausible guess.

Also closes the LGYE question raised in §4b.10 as a possible earthquake:
its nearest neighbour (BLN2, 51 km) stays within 3 mm on both of LGYE's
worst days, ruling out a real coseismic origin for that excursion. It
remains open as a station or processing problem.
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