Experiences with the GPS in Unstabilized CubeSat

Table 2

piNAV output messages.

Message	Name	Main content
$GPGGA	Global positioning system fix data	UTC, position and high in LLH, no. of tracked satellites, HDOP
$GPRMC	Recommended minimum sentence C	UTC, LLH position and high, ground speed and course
$GPVTG	Track made good and ground speed	Course and ground speed
$GPGSV	Satellites in view	Azimuth and elevation of GPS satellites and signal-to-noise ratio
$PSLSP	LEO satellite position	GPS time and week, position in ECEF, no. of sat. used for PVT, PDOP
$PSLSV	LEO satellite velocity	GPS time and week, velocity vector in ECEF, no. of sat. used for PVT, PDOP
$PSLSS	Receiver status	Power line voltage, current, antenna current, receiver temperature