Re: gnss-sdr problems

[Carles Fernandez <carles.fernandez@cttc.es>]

Dear Apostolos,

thanks for your report. The SUPL assistance by default asks for data to the server supl.google.com, which seems to be failing lately. Could you please replace the value “supl.google.com” by “supl.vodafone.com” in the parameters SUPL_gps_ephemeris_server and SUPL_gps_acquisition_server of your configuration file?

The second problem seems also related to the same issue. The program cannot download the SUPL assistance, so it ends. At program ending, the bias-t is disabled. This is expected behavior.

Hope this helps,

Carles

 

El 28 ago 2019, a las 17:45, Apostolos Kefalas <sv1ljj@raag.org> escribió:

Hello all,

I am trying to configure the gnss-sdr on an newly upgraded Buster and I
have 2 problems.

While trying to run front-end-cal I get the following error:

$ front-end-cal --config_file=front-end-cal.conf
Initializing... Please wait.
Logging will be done at /tmp
Use front-end-cal --log_dir=/path/to/log to change that.
Trying to read ephemeris from SUPL server...
SUPL: Trying to read GPS ephemeris from SUPL server...
ERROR in SUPL client. Please check your Internet connection and SUPL
server configuration
ERROR in SUPL client. Please check your Internet connection and SUPL
server configuration
SUPL: Trying to read Acquisition assistance from SUPL server...
ERROR in SUPL client. Please check your Internet connection and SUPL
server configuration
Failure connecting to SUPL server

Also, while I use the options to enable the build-in bias-t of my RTL-
SDR Blog V3 dongle, it seems that front-end-cal is disabling the bias-t
just about when it prints this:

Front-end RAW samples captured
E0828 18:41:36.994459 19662
gps_l1_ca_pcps_acquisition_fine_doppler.cc:105] This implementation
does not provide an output stream
Searching for GPS Satellites in L1 band...
[
1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  
21  22  23  24  25  26  27  28  29  30  31  32 ]
Total signal acquisition run time 12.4039 [seconds]
Unable to get Ephemeris SUPL assistance. TOW is unknown!
GNSS-SDR Front-end calibration program ended.

Can anyone please verify these before I report a bug?


Thanks
Apostolos

-- 
------------------------------------------------------------
Dr. Carles Fernández Prades
Senior Researcher

Head of Statistical Inference for Comm. & Positioning Dept.

Communication Systems Division

Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
Address: Parc Mediterrani de la Tecnologia
      Av. Carl Friedrich Gauss, 7
      08860 Castelldefels, Barcelona, Spain.
Phone: +34 936452900    Fax: +34 936452901
http://www.cttc.es/people/cfernandez/ 
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