Globalstar SmartOne C User Manual

Page 50SmartOne C User Manual Confidential & Proprietary Information
9100-0410-01 R2.4
TYPE 1 MESSAGE CLASS
TRUNCATED MESSAGE TYPE – SINGLE PACKET
This message type provides for up to 2 bytes plus 6 bits of user data to be appended to the status byte and GPS
location information. The input and status bits data of the standard message are replaced with user data from the
configuration port. The Truncated message will follow the following on-air format:
VARIABLE BITS DESCRIPTION
STATUS BYTE 8
Bit (1:0) = 1 Truncated message type
Bit (7:2) = submask data from Truncated user data
LATITUDE/LONGITUDE 48
Byte 1 = Latitude MSByte
Byte 2 = Latitude
Byte 3 = Latitude LSByte
Byte 4 = Longitude MSByte
Byte 5 = Longitude
Byte 6 = Longitude LSByte
360 degrees of longitude coded in signed binary with 3 bytes and 180 degrees of latitude coded
in signed binary with 3 bytes
Positive longitude corresponds to East longitudes
Positive Latitude corresponds to North latitudes
See Appendix G for an Lat/Long decoding example
USER DATA 16
Byte 1 = User data byte 1
Byte 2 = User data byte 2

Globalstar SmartOne C Specifications

General

Brand	Globalstar
Model	SmartOne C
Category	Modem
Language	English