Tom Van Baak wrote: > SatId 20959 GPS SVN32 should now be visible here in Seattle > but I have no success seeing it with either a Thunderbolt, an > Oncore VP, a Datum 2000, or an M12. True, the satellite is > marked unhealthy so it is expected not to see it in the GUI or > the timing solution. > > However, I am also logging raw Motorola binary messages out of > the M12, including the @@Ha status message which reports > unhealthy as well as healthy satellites, I think. Still no SVN 32. > > I have a hunch. > > The M12 has a @@Am message to manage the "satellite ignore > list". According to the manual this is a 4-byte (32-bit) field and > thus it appears there is no way to set the ignore bit for any satellite > with SVN > 31. Perhaps not a problem. But it suggests there may > be internal 32-bit limitations, yes? > > Same thing for a Thunderbolt. There are a number of places in > the TSIP user manual that talk about 32 SVN (i.e., 0 to 31, or > 1 to 32) and no more. A similar 32-bit binary limitation as the > M12, perhaps? > > I wonder if someone at Trimble or ex-Motorola could comment. > > My rash prediction is that no one is going to see SVN32 with > an Oncore VP, M12, Thunderbolt, and maybe a few others. > > Then again, I wonder if things might magically improve in a > week when they set it healthy. > > Note this is not a operational or performance problem, really. > GPSDO did just fine before 32 SV and a receiver overlooking > one or two high-numbered SV due a 32-bit receiver limitation > isn't going to make a noticeable difference in the performance > of a multichannel receiver or GPSDO. > > Tom
What about the Trimble Resolution-T? Its TSIP Command packet 0x39 allows for PRN values of 1-32 with 0 used to indicate all satellites. This range for PRN 0, 1-32 is consistent throughout the Resolution T documentation. Bruce _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
