Meddling with GPS / Antaris protocol specification
andy at openmoko.com
Sun Jul 27 09:25:18 CEST 2008
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Somebody in the thread at some point said:
| ogpsd now has a pretty complete UBX parser. You can send arbitrary
| packets at startup for initialization and enable periodic reporting of
| specific packets.
| NAV-SVINFO: Tells us which SVs we see, what carrier to noise ratio they
| have, whether almanac of ephemeris is available (we could see how long
| it takes under different situations), whether we're currently receiving
| data from this SV (QI).
One caution with extrapolating this output from that device: I often
found when connection antenna while powered, I got fake satellites
reported at that time which persisted for many seconds, each with a
seriously reported SNR, etc... it made me wonder about the level of
inference used to source this nice data it spits out...
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