[FOSS-GPS] New program to download Axhtech Z12 files, but need info
John Ackermann N8UR
jra at febo.com
Fri Jun 7 15:20:56 PDT 2019
I've written a Python program to download R-files from an Ashtech Z12
receiver. I'm successfully getting files, but the recent GPS WNRO event
has messed things up. I'll be releasing this program with GPL once I
have it working (it'll be on my github -- https://github.com/n8ur).
I've tried feeding my result into teqc with the -weeks option but
although I can get it to report the correct date, the +qc option reports
an ephemeris error that seems to indicate something else needs to be
corrected, with a 1999 year showing up).
If I knew the layout of the R- file (record structure), I think I could
patch the TOW values in the binary, hopefully fooling teqc into making a
valid RINEX file.
I know that the Ashtech file format was considered proprietary 20 years
ago, but in the meantime has anyone figured it out? Any info would be
If I can't make the R- file download work, we can stream the data to PC
in real time, but the ability to collect without a PC connected would be
PS -- why work on such an ancient receiver? Well, we got several of
them for a good price and want to use them for time stability
measurements of precision frequency standards.
More information about the FOSS-GPS