I doing tests with my RAK10701 Field Tester capabilities

I am doing tests with my RAK10701 Field Tester capabilities.

Now I am doing GPS satellites tracking abilities with a comparison between GPS Test App in my Androids smartphone ( https://play.google.com/store/apps/details?id=com.chartcross.gpstest )

If you take a look in the App screen, we will really find one satellite with SNR 39 dB and all others <= 26 dB.

my question is: In the RAK10701, what is the criterion to consider a satellite signal not good, SNR below …, or is it other criterion ?

Regards,

Cláudio