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
GNSS-SDR.internal_fs_sps
The old name was misleading, since the units are samples per second and
not Hertz.
Backward compatibility is kept, so this change does not break any
existing configuration.
This commit Integrates RTKLIB positioning libraries in a universal PVT
block implementation called RTKLIB_PVT. This results in an improved
positioning accuracy and precision with a wide range of options
(including Precise Point Positioning and ionospheric/troposphreic
models).
Not all the RTKLIB features have been ported. Some of them will be
progressively added. The ported options and how to configure them have
been documented in the website, see
http://gnss-sdr.org/docs/sp-blocks/pvt/
This commit also introduces a multi-band, multi system Observables block
implementation.
Relevant architectural changes that reduce latency and makes
multi-system, multi band signal handling easier.
Redundant blocks have been deleted. Old configurations are automatically
redirected to the new blocks for Observables and PVT, so the commit does
not break any existing configuration. The user should just notice a
relevant improvement in positioning performance.
# Conflicts:
# src/core/receiver/gnss_flowgraph.cc
Added information on how to retrieve SUPL parameters, and indicators to
userd on where to point to their own file or IP address. Removed unused
parameter wait_for_flowgraph.
Old configurations folder removed. Names ending by "short" but reading
files of interleaved data have been renamed to "ishort". Some spare
fixes. Added examples of configuring the period and port of RTCM
messages.
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the post correlation noise floor. If enabled
(.Acquisition_1C.use_CFAR_algorithm=true) as an option in the
acquisition configuration, it allows setting more stable thresholds in
the presence of non-gaussian front-end noise (which is the usual
behavior of front-ends....)
