SatelliteInfo (UORB message)
c
uint64 timestamp # time since system start (microseconds)
uint8 SAT_INFO_MAX_SATELLITES = 40
uint8 count # Number of satellites visible to the receiver
uint8[40] svid # Space vehicle ID [1..255], see scheme below
uint8[40] used # 0: Satellite not used, 1: used for navigation
uint8[40] elevation # Elevation (0: right on top of receiver, 90: on the horizon) of satellite
uint8[40] azimuth # Direction of satellite, 0: 0 deg, 255: 360 deg.
uint8[40] snr # dBHz, Signal to noise ratio of satellite C/N0, range 0..99, zero when not tracking this satellite.
uint8[40] prn # Satellite PRN code assignment, (psuedorandom number SBAS, valid codes are 120-144)