2 ms·
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 c
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
- slow_typist 2y agoAngular size of the earth should be about 2 degrees. That is about nothing compared to the beam width of a 15 dB antenna. So space noise is definitely a factor here. However they made it work, and could have used an antenna with much more gain (think voyager dish) if necessary. Probably the idea behind the experiment is to track rovers on the surface where the antenna is only roughly pointed at earth - without the complexity and energy budget coming with a rotator.