2. Telemetry

There are 2 different packet formats that ChipSats downlink: data packets and callsign packets. Multi-byte fields should be read as little endian.

Data packet

Byte #	Bits	Data	Min	Max	Mapped Min	Mapped Max	Units
0-1		GPS Latitude	-9000	9000	-90.00	90.00	degrees
2-3		GPS Longitude	-18000	18000	-180.00	180.00	degrees
4-5		GPS Altitude	0	65535	0	655350	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	-10	10	G
10		Acc Y	0	255	-10	10	G
11		Acc Z	0	255	-10	10	G
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	15
	4-7	Invalid Uplinks	0	15
17	0	[Unused]
	1	Receive Flag	0	1
	2	GPS On	0	1
	3	IMU Valid	0	1
	4	GPS Altitude Valid	0	1
	5	GPS Position Valid	0	1
	6-7	ChipSat ID	0	3

Callsign packet

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