Adds GLONASS L2 C/A signal processing to GNSS-SDR based on previous
work developed for the L1 signal. All code have been added in a single
commit with the idea to illustrate the process of signal addition for
future work
Fixes issue with time being logged to the observation file in GLONASS.
The code was not accounting for the leap seconds when logging the
observation timeS
dongle, so it can feed an active antenna (see #77)
The activation is done by adding
SignalSource.osmosdr_args=rtl,bias=1
to the configuration file, if using gr-osmosdr >= 0.1.4-13
For older versions of gr-osmosdr, you can use
https://github.com/rtlsdrblog/rtl_biast
Adds RINEX support for receiver type 28 which combines GPS L2C and
GLONASS L2C. Fixes a couple of bugs in RINEX file generation and adds
new configuration files for L2C processing
Debugs code to fix GLONASS coherent integration. Adds message handling
from telemetry decoding to signal tracking modules. Bug on poor track
performance stills need to be determine.
Added code to enable RTCM header generation when in GLONASS. Also fixes
bug to allow combined observations from GPS and GLONASS. Fix some code
compilation warnings and unit tests.
First positon fix using a combination of GLONASS and GPS data in
GNSS-SDR. The position solution may need further testing but initial
results are looking quite promising.
First GLONASS L1 C/A position fix using GNSS-SDR. Fixes bug in toe
reporting for GLONASS and cleans up the code a bit. Small bug with
RINEX file still present but achievement deserves its own commit.
Need to fix bug in time duration with posix time and deal with day
offsets in the code. Something seems off with day duration for long
periods of time.
Signal identifier for GLONASS L1 C/A was changed internally to be `1G`
instead of the '1C' originally conceived from the navigation software.
Also, forces PRN number update from decoding interface
Fixes bug in TOW update when a new value has been computed. This adds a
new flag to keep track of TOW update given the tk component. The code
fix improves the pseudorange measurement for code
Fixes the TOW computation mapping from GLONASS Time to UTC time and then
conversion to TOW and WN. The logic of the conversion considers time
offsets but may need to be reviewed.
Forces conversion of semicircles to radians units in some GNAV Almanac
parameters. In addition, adds safeguards in code to avoid invalid
slot number identification.
Adds code to solve the shared frequency channels for GLONASS satellites
during acq and trk, it is now decode responsability to fix the identifier
when decoding of ephemeris happens. It also adds more details in tracking
plotting and fixes silly bug that created false alarm.
The code fixes the computation of the carrier frequency for pcps
acquisition of GLONASS satellites by making it relative to the IF. Also
new plotting features are added to visualize results
