36 lines
2.0 KiB
Markdown
36 lines
2.0 KiB
Markdown
# Navigation readiness review
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## Gate result
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The standalone receiver path decoded SignalSim RF samples without consuming
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simulator ephemeris, satellite states, transmit times, receiver truth, or RINEX
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fields. The RINEX source was opened only by a separate post-decode comparison.
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The reproducible `navigation_multisat` vector contains 131,758,308 complex IQ8
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samples (32.2 s at 4.092 MHz), SHA-256
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`b38393b32eec2df53f9813ea7ff8f13e5e0fc72fa5cb7fb910a2b8f907a56a6e`.
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| Criterion | Evidence | Result |
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| --- | --- | ---: |
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| E1B prompts and raw symbols from tracked RF | Five `prompt_epochs.npz`, `soft_symbols.npy`, and `hard_symbols.bin` artifact sets | PASS |
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| Stable symbol and page synchronization | Repeated 250-symbol sync confirmation; 146 synchronized page parts | PASS |
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| Deinterleaving | Official Annex D.2 coded vector plus RF pages | PASS |
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| Soft-decision FEC | Independent Annex D.2 vector; all 70 received pages FEC-valid | PASS |
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| CRC | Independent CRC-24Q check vector; 70 pass, 0 fail | PASS |
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| Critical words | Types 1–6 decoded and typed | PASS |
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| Complete ephemeris | PRNs 1, 4, 21, and 27; atomic matching IODnav sets | PASS |
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| Satellite clock | Word 4 clock polynomial for all four complete satellites | PASS |
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| Galileo time | GST week 1138, TOW 554765 s from tracked page data | PASS |
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| Health and validity | Four complete satellites report usable E1B health and DVS | PASS |
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| Independent truth comparison | Every ephemeris/clock field within 0.5 broadcast LSB; GST within its 1 s resolution | PASS |
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| Reproducible artifacts | Prompt, symbol, page, FEC, CRC, word, ephemeris and summary evidence per PRN | PASS |
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| Decoder truth isolation | Collection report records `decoder_truth_inputs: []` | PASS |
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PRN 19 deliberately demonstrates the incomplete-data behavior: it received
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word types 2–6 but not word 1 during the observation, so no ephemeris was
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fabricated or committed. The other four satellites satisfy the readiness gate.
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PVT has not been implemented or started in this milestone.
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NAVIGATION DATA READY FOR PVT
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