querbu

4 ms·

1. 1.▲
   by querbu 2y ago

   Er.... No. Earth is either visible 100% or 0% of the time, the Moon is tidally locked
2. 2.▲
   by querbu 2y ago

   L5 can achieve 10-15 dB in ideal circumstances, with tuned loops. Not more. And those aren't ideal circumstances - the GPS signals are received mostly when satellites are grazing the earth (from the moon POV).
3. 3.▲
   by querbu 2y ago

   Since the high gain antenna is pointed at the entire earth, the noise temperature is similar earth temperature. Semi-custom gnss receiver, they collect mostly correlator outputs, and 2.5 seconds of raw IQ
4. 4.▲
   by querbu 2y ago

   More details: + 44dBm GPS transmit power -210dB path loss + 15dB rx antenna gain -151dBm received signal strength That's slightly worse (5dB) than signal strength of a handheld device/ phone (~15dB typical handheld loss