GLOBALSTAR PROPRIETARY AND CONFIDENTIAL INFORMATION
Use or disclosure of data contained on this sheet is subject to the restrictions in the Distribution Statements on the title page of this
document.
06/18/20
Subject to Change without Notice
P a g e | 34
0x10 = RESERVED
0x20 = Low Battery (Tracking rate reduced to low battery rate)
0x40 = GPS location invalid
0x80 = GPS location of low confidence
4.2.2.13
“Proprietary Track” command
This command allows the initiation of a periodic track message with user defined data prepended and appended to the
latitude and longitude fields. A periodic 9-byte custom track message, transmitted nominally at the interval specified,
will result.
The behavior of this mode differs somewhat from the same mode’s behavior in the STINGR product. In the
ST100 board
implementation, if the interval is set to 30 minutes or greater, a redundant burst transmission will be initiated at each
interval, with
the number of attempts and the timing between the attempts as specified in the “setup” command.
If the
interval is less than 30 minutes, a single transmission will be sent per interval.
If the interval is 40 minutes or greater, the ST100 board will randomize the start of each burst by +- 10 minutes around
the nominal. For example, if a track mode with an interval of 1 hour is started at 12:00, the next bursted position report
will begin randomly between 12:50 and 1:10, the one after that will begin between 1:50 and 2:10, etc.
While in Proprietary Track mode with an interval of 30 minutes or less, the GPS will retain its clock and ephemeris data
in order to perform a “hot” GPS fix. This will increase the sleep current by roughly 50uA in such a
track mode.
If the unit is already in a track mode, and this command is sent, it will be NAKed. To change the track rate, the “Cancel
Proprietary Track” command must be sent, and a new track command then issued.
Operating Mode
Standby Current
Proprietary Tracking <= 30 minute interval
GPS Standby Mode
Proprietary Tracking > 30 minute interval
Standby Mode
