Polar.sh /dev/stdin issue

[cdan1]

Everytime I run polar.sh I get an error code for line 40. I have been using dump1090-mutability and all plots work except, heatmap_high, azimuth/elevation plot, range/altitude, and close range/altitude. Please advise. Code below from terminal.

ADS-B and MLAT aircraft will be plotted
Using disk : /home/pi/directory
Using local archive:
Unpacking compressed data:
...
Retrieving recent history:
......................................................................................................................................................
Number of data points collected: 20865
Calculating Range, Azimuth and Elevation data:
Filtering altitudes
Generating all altitudes heatmap...
Generating high altitude heatmap...
"/dev/stdin" line 40: warning: Skipping data file with no valid points
Generating low altitude heatmap...
Generating close range heatmap
Generating elevation heatmap...
Generating Range/Altitude plot...
Generating Close Range altitude plot
Generating low heatmap with map overlay
Graphs available at :
http://raspberrypi/dump1090-mutability/plots/
Graphs rendered in 56 seconds

[caiusseverus]

That is because the script is written with dump1090-fa in mind. dump1090-mutability uses a slightly different data field for altitude which is why the script is not seeing any valid data. The mutability branch has not been maintained for some time - the dump1090-fa fork is now maintained by the same person and has numerous updates so I would recommend updating to it. There is also readsb, another fork which should also be compatible, though I haven't tested it with this script.

If you want to modify the script to work with dump1090-mutability specifically feel free, but I'm not using it anymore so am not likely to update the script to support it.