typeTransmitter in GnssResiduals2Skyplot.

[lambert87041]

Description

I have found something wrong about the function gnssResiduals2Skyplot. When I set the parameters ‘type’ to ‘***G’, ‘typeTransmitter’ to ‘***G05’, which means that I just want to draw only one satellite in skyplot. But the output image is like this:

After I checked the code and added the content about PRN matching in the gnssResiduals2Skyplot, I found that the output image became normal.

It seems that there is still a problem with the function of using ‘typeTransmitter’ to match a satellite. Of course, I am not sure whether it is the problem of my configuration file. I am using the GROOPS compiled by Visual Studio 2017.

GROOPS version

main (latest commit)

Operating systems

• Linux
• Windows
• macOS
• Other (please specify in the description)

Log output

The log seems normal
2023-02-25 15:34:10 Status  === Starting GROOPS ===
2023-02-25 15:34:10 Info    Config file: <D:\data\2021\scenarioGnssPPP\skyPlot.xml>
2023-02-25 15:34:10 Status  --- FileCreateDirectories (D:/data/2021/scenarioGnssPPP/skyplot) ---
2023-02-25 15:34:10 Status  Create directory <D:/data/2021/scenarioGnssPPP/skyplot>
2023-02-25 15:34:10 Status  --- LoopPrograms (daily) ---
2023-02-25 15:34:10 Status  === 1. loop ===
2023-02-25 15:34:10 Status  --- FileCreateDirectories (D:/data/2021/scenarioGnssPPP/tmp/2022-01-01) ---
2023-02-25 15:34:10 Status  Create directory <D:/data/2021/scenarioGnssPPP/tmp/2022-01-01>
2023-02-25 15:34:10 Status  --- LoopPrograms (positions) ---
2023-02-25 15:34:10 Status  === 1. loop ===
2023-02-25 15:34:10 Status  --- GnssResiduals2Skyplot (D:/data/2021/scenarioGnssPPP/tmp/2022-01-01/grid_2022-01-01.WUH2.gps.dat) ---
2023-02-25 15:34:10 Status  read GNSS residuals <D:/data/2021/scenarioGnssPPP/output/2022-01-01/residuals_2022-01-01.WUH2.dat>
2023-02-25 15:34:14 Status  save values to file <D:/data/2021/scenarioGnssPPP/tmp/2022-01-01/grid_2022-01-01.WUH2.gps.dat>
2023-02-25 15:34:15 Info    grid statistics
2023-02-25 15:34:15 Info      count: 23516
2023-02-25 15:34:15 Info      area:  187134% of Earth's surface (9.56646e+11 km^2)
2023-02-25 15:34:15 Info    data statistics
2023-02-25 15:34:15 Info      rms:  40.2402      
2023-02-25 15:34:15 Info      avg:  34.0066      
2023-02-25 15:34:15 Info      min:  3.65687      
2023-02-25 15:34:15 Info      max:  178.719      
2023-02-25 15:34:15 Info      mean: 34.0066      
2023-02-25 15:34:15 Status  --- PlotMap (D:/data/2021/scenarioGnssPPP/skyplot/skyplot_2022-01-01.WUH2.png) ---
2023-02-25 15:34:15 Status  create temporary data files
2023-02-25 15:34:15 Status  create scriptfile
2023-02-25 15:34:15 Status  run scriptfile
2023-02-25 15:34:16 Status  1 loops in time 00:00:06
2023-02-25 15:34:16 Status  1 loops in time 00:00:06
2023-02-25 15:34:16 Status  === Finished GROOPS ===

[tmayerguerr]

Hi,

From the documentation:

If with typeTransmitter (e.g. '***G05') a single transmitter is selected, the azimuth and elevation are computed from the transmitter point of view.

The plot is correct: it shows the motion of the WHU station as seen from the G05 satellite (azimuth and elevation of the station in the satellite body frame). If you want to have the skyplot as seen from WHU station for a single satellite, set the parameters ‘type’ instead of typeTransmitter to ‘***G05'.

regards
Torsten

[lambert87041]

Thank you for your reply, but actually I have tried this method before. After setting the parameter ‘type’ to ‘***G05', the output skyplot is like this:

This is obviously the skyplot of all GPS satellites.So I'm not sure whether there are parameters that are not set correctly or whether there are problems with the functions here.Thank you again for your answers！

[tmayerguerr]

I am sorry, you are right: there was an additional bug. Should be fixed now with the latest commit.
regards
Torsten

[lambert87041]

Thank you for your reply. Best wishes!