decoding: Changes in the flowgraph and in the configuration files to mix
channels from different GNSS systems in the same receiver. Hybrid
observables and PVT under construction.
The changes in the configuration file parameter names are NOT backward
compatible. The receiver can still work as usual in single GNSS system
mode but some modification on configuration files are required. Use the
example provided of Hybrid configuration file.
- Bug fixes at Galileo telemetry decoder state machine
- Bug fixes at Galileo Ephemeris decoder (two complement's data interpreted as unsigned, mismatch at the LSB weights)
Galileo KML output is avalable!!
Galileo RINEX is still under construction
git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@433 64b25241-fba3-4117-9849-534c7e92360d
Bug fix in galileo tracking
Several improvements in Galileo telemetry decoder.
Code cleaning in observables
Galileo PVT is able to decode Galileo time and get satellite ECEF positions
Galileo PVT soluton is still under development
git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@432 64b25241-fba3-4117-9849-534c7e92360d
- Changes in Galileo telemetry decoding (still under construction)
- Bug correction in tracking blocks that could cause random segmentation faults on some configurations
git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@431 64b25241-fba3-4117-9849-534c7e92360d
- The GNSS-SDR code-based Observable generation algorithm for GPS L1 C/A was migrated from common TX time to common RX time. One of the main reasons is that the common TX algorithm was incompatible with the standard RINEX observables, wich requires the oservables at the same time of reception.
- Using common Rx time, the code was simplified and now requires less memory due to the lack of symbol buffer
- Now it is possible to use standard RINEX post processing software (gpstk and rtklib for instance) to get PVT and the obtained precision is comparable to the internal Least Squares solver. It is possible to use also the carrier phase observable, but is still experimental.
- The default RINEX version output was set to 2.11 in this revision. RINEX 3.00 is under verification now.
git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@364 64b25241-fba3-4117-9849-534c7e92360d
- Gps telemetry decoder and PVT now uses independent queues for ephemeris, iono, utc_model and almanac. The old gps_navigation_queue is now deprecated and it is removed from the implementation. This affect almost all the PVT and Rinex printer classes.
- Rinex printer class updated to use the new ephemeris, iono, utc_model objects
Bug fixes and correction:
- The pseudorange generation now is based on the computed TOW for each received symbol. The History_Shift computation become simplier in this way. This modification is also a solution for a bug where the pseudoranges became temporally invalid when the TOW is updated (that happen every 6 secons!)
git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@343 64b25241-fba3-4117-9849-534c7e92360d
const bits_slice INTEGRITY_STATUS_FLAG = {{23,1}};
used in GPS_L1_CA.h are not allowed in the C++11 standard since they do not correspond to any valid constructor. This is accepted by the current version of gcc (probably due to backward compatibility with C and earlier versions of C++), but it *could* not be accepted in future versions. This can be fixed by putting the struct into a std::vector. I don't know if this is the best way but it seems to work well and does not implies major changes in the code.
There is another issue with the Gnss_Synchro class. Since it had a constructor and a destructor, it could not be considered a POD (Plain Old Data) structure and this has some limitations: while gcc and the C99 standard allowed an array's size to be determined at run time, this extension is not permitted in standard C++. This issue has implications when passing Gnss_Synchro through memory between signal processing blocks. In order to fix this, I have removed the Gnss_Synchro.cc implementation and now this is a header-only class where the array size can be determined at compile time
git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@204 64b25241-fba3-4117-9849-534c7e92360d
- Updated all available trackings to generate the tracking_timestamp_secs taking into account the remainder code phase.
- Updated the telemetry decoder to track the number of symbol shifted from the preamble start symbol (to be used in observables).
- Updated observables to align the reference channel symbol with the corresponding symbols in the other channels and compute pseudorranges using the common transmission time algorithm.
- Updated PVT to independize the display output rate from the RINEX and KML log files. New options available in config file!
- Some minor improvements and code cleaning.
git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@193 64b25241-fba3-4117-9849-534c7e92360d
