Hi Mark,
Mark Sims wrote:
I wanted to have Heather make a RINEX file that could be submiited to OPUS-GIS to get a more precise antenna location. The Tbolt does not support carrier phase measurements. It does output doppler values.
The code phase (pseudorange) values that it outputs look to be VERY difficult
to translate into normal pseudoranges. You need to calculate the satellite
positions from the almanac, etc to be able to use them.
You should not use the alamanc ephemeris data but rather use the
ephemeris data transmitted from that satellite. The difference is in the
precission. The almanac is meant to help receivers find the birds in the
sky, but each bird transmitt the ephimeris data that should be used for
navigation.
OPUS-GIS is still in alpha testing mode. I don't know what observable you need
to have it post process the data.
Code or Carrier Pseudorange, Integrated doppler
Ephimeris
GPS time
Just read GPS ICD 200 and you should understand most of it. You should
also have one or a pair GPS books, The Kaplan book is good and classic,
and the Enge book is more torough, but maybe a bit less practical
oriented than the Kaplan book. The Kaplan book alongside with GPS ICD
200 is enought to implement a GPS receiver (assuming the RF section is
there or simple).
Cheers,
Magnus
_______________________________________________
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.
