NEO-M9N only use 16 satellites with nav. update rate >5Hz

[RainFly]

If you are also wondering, why your Ublox M9N GPS only receives 16 Sats with 4 constellations activated, this might be the answer:

https://portal.u-blox.com/s/question/0D52p0000AOK91vCQD/can-neom9n-only-use-16-satellites-with-nav-update-rate-5hz

http://www.mateksys.com/?portfolio=m9n-can#tab-id-10