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-[L36-A → L36C-A → L25N-B, very bad GNSS – log\_28586](#l36-a--l36c-a--l25n-b-very-bad-gnss--log_28586)
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-[Simple projection](#simple-projection-11)
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-[Path calculation](#path-calculation-11)
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-[Path projection](#path-projection-11)
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-[Airport branch (L36N)](#airport-branch-l36n)
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-[L36N track A – log\_29224](#l36n-track-a--log_29224)
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-[Simple projection](#simple-projection-12)
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-[Path calculation](#path-calculation-12)
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-[Path projection](#path-projection-12)
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-[L36N track A – log\_30779](#l36n-track-a--log_30779)
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-[Simple projection](#simple-projection-13)
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-[Path calculation](#path-calculation-13)
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-[Path projection](#path-projection-13)
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-[Degraded GNSS cases](#degraded-gnss-cases)
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-[L36-A → L36C-A → L25N-B, very bad GNSS – log\_28586](#l36-a--l36c-a--l25n-b-very-bad-gnss--log_28586)
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-[Simple projection](#simple-projection-14)
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-[Path calculation](#path-calculation-14)
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-[Path projection](#path-projection-14)
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-[L36 track A, very bad GNSS – log\_38373](#l36-track-a-very-bad-gnss--log_38373)
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-[Simple projection](#simple-projection-15)
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-[Path calculation](#path-calculation-15)
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-[Path projection](#path-projection-15)
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-[File reorganisation](#file-reorganisation)
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Root folder for release exe: `target/release/`
@@ -610,232 +593,56 @@ Good result:
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Log file ID: 31259
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Same route as log_28573. The path calculation resolves fewer segments than the other four logs of this route — the GNSS coverage ends earlier on the L25N-B leg.

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Same route as log_28573. Quality of GNSS is also relatively good, small drift near the station of the airport. No screenshots because nothing special to report.
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## Airport branch (L36N)
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### L36N track A – log_29224
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Log file ID: 29224
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Train traveling on the L36N airport branch, track A (underground tunnel beneath the airport).

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### L36-A → L36C-A → L25N-B, very bad GNSS – log_28586
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Log file ID: 28586
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## Degraded GNSS cases
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Coming from Brussels towards Leuven, taking the junction to the airport and then returning to Brussels again. The GNSS solution is in very bad shape:
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These logs have heavily corrupted GNSS data. Despite the degraded input, the path calculation algorithm should still find the correct route (or the most plausible route given the available evidence).
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### L36-A → L36C-A → L25N-B, very bad GNSS – log_28586
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Zoom in on problem area:
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Log file ID: 28586
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Same route as log_28573 but with severely degraded GNSS data. The algorithm is expected to find the same netelement sequence despite the noise.

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---
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### L36 track A, very bad GNSS – log_38373
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Log file ID: 38373
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Degraded GNSS data on L36 track A (no switches). The path calculation finds a plausible route but the low probability values reflect the poor signal quality.

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Note: the path diverges from clean L36-A logs (e.g., log_29083) in the later segments (`88_L_2094, 88_L_1932, 88_L_3878, 88_L_9764`), following the L36N-A branch instead of continuing purely on L36-A. This is a known limitation with very sparse GNSS data where the algorithm cannot distinguish between adjacent tracks.
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Zoom on detail:
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