GPS Drops in Satellites at 4:12 elapsed time

[Harkhka (Divyanshu Harkhka)]

Hi,

Looks like a similar issue to this:

Here4 loses many satellites and positional accuracy ~8:20min after being switched on

Test Systems: Holybro 6x & Here4 on Px4 1.15.4 and Px4 1.16.1 CubeOrange & Here4 on Ardupilot 4.6.3 Here4 Hardware Version 4.19 Here4 Firmware Version 1.15.C71AF5….. What happens: Approximately 8:20minutes after system power-up, the Here4 loses about half of its satellites for a second or less. As a result, the position becomes too inaccurate, and depending on the configuration, the system switches to failsafe land mode or drops out of position modes like Position (Px4) and back to, for example, Althold. After this single dropout occurs, it does not happen again. I was able to continue a test flight for about 30 minutes after this dropout without further problems. This dropout can also be observed while on the ground. In fact, any flight controller with a connected Here4 module is sufficient to reproduce this error. It happens consistently, regardless of the flight controller hardware (in our tests, CubeOrange and Holybro 6x) or the time of day (satellite position). Px4 Logfiles (6x FC + Here4 setup - no flight): https://review.px4.io/plot_app?log=ede73e3e-040e-4b26-b931-267b9b0d7549 https://review.px4.io/plot_app?log=24198eb7-7074-480b-818a-2a7d464e33cb https://review.px4.io/plot_app?log=1af8be9a-f329-4465-8f44-0719e6e7c712 Ardupilot Logfile (CubeOrange + Here4 setup - no flight): ArdupilotLog.zip (5.5 MB) Dataplot Image: [image]

Maybe you can post your query there as well to get a faster response.

Thanks.