Globalstar ST100 - Proprietary Track Response and Payload

37ST100 User Manual v1 Confidential & Proprietary Information
8545-0194-01 v1.0
Example Command: AA 0A 30 00 0A AA BB CC 90 84
Where:
• Period : 0x000A (10 minute intervals)
• Payload Byte 0: 0xAA
• Payload Byte 7: 0xBB
• Payload Byte 8: 0xCC
Example Response: AA 05 30 5A F5
Example Payload: 0xAA2B4856BFF032BBCC
Where: 2B4856 is the 24-bit latitude 30.433051586151 (North)
BFF032 is the 24-bit longitude -90.086817741394 (West)
See section 4.6: “24 bit location format” for documentation of the encoding/decoding of Globalstar on-air location data.
BYTE BITS PARAMETER DESCRIPTION
0 0 - 7 Leader Always a value of 0xAA
1 0 - 7 Length 0x0A (10 decimal)
2 0 - 7 Command Code 0x30 = Initiate proprietary track
3-4 0 - 15 Interval
Interval in minutes between the track points. 2 to
65535 minutes. (A setting of 2 actually results in
a 2.5 minute interval, any other value results in
an interval of that many minutes).
5 0 - 7 Byte 0 value The value to transmit as byte 0
6 0 - 7 Byte 7 value The value to transmit as byte 7
7 0 - 7 Byte 8 value The value to transmit as byte 8
8-9 0 - 15 CRC
BYTE BITS PARAMETER DESCRIPTION
0 0 - 7 Leader Always a value of 0xAA
1 0 - 7 Length 0x5
2 0 - 7 Command Code 0x30 = ACK or 0xFF = NAK
3-4 0 - 15 CRC
PROPRIETARY TRACK COMMAND FORMAT
INITIATE PROPRIETARY TRACK RESPONSE