2. Telemetry

There are 2 different packet formats that ChipSats downlink: data packets and callsign packets.

Data packet

Byte #	Bits	Data	Min	Max	Mapped Min	Mapped Max	Units
0-1		GPS Latitude	-9000	9000	-90	90	degrees
2-3		GPS Longitude	-18000	18000	-180	180	degrees
4-5		GPS Altitude	0	50000	0	500000	meters
6		Gyro X	0	255	-245	245	deg/s
7		Gyro Y	0	255	-245	245	deg/s
8		Gyro Z	0	255	-245	245	deg/s
9		Acc X	0	255	-20	20	m/s2
10		Acc Y	0	255	-20	20	m/s2
11		Acc Z	0	255	-20	20	m/s2
12		Mag X	0	255	-100	100	uT
13		Mag Y	0	255	-100	100	uT
14		Mag Z	0	255	-100	100	uT
15		Temperature	0	255	-40	125	°C
16	0-3	Valid Uplinks	0	16
	4-7	Invalid Uplinks	0	16
17	0-1	ChipSat ID	0	3
	2	GPS Valid	0	1
	3	IMU Valid	0	1
	4	Boot Flag	0	1
	5	Receive Flag	0	1

Callsign packet

Byte #	Character	ASCII
0	K	75
1	D	68
2	2	50
3	W	87
4	T	84
5	Q	81