Location Transmission Behavior

If the reporting 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 by the reporting rate. 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 GPS standby current to the “GPS Standby Mode” value in the table below. For tracking intervals greater than 30 minutes, the GPS will be powered off in between transmissions, and the sleep current will be the “Standby Mode” value. If the interval is 40 minutes or greater, the GSatSolar Series 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 burst position report will begin randomly between 12:50 and 1:10, the one after that will begin between 1:50 and 2:10, etc. If the GSatSolar Series is in a motion detection mode, the accelerometer will remain powered during the standby periods in between transmissions, and the accelerometer standby current will be the “Standby mode supply current with accelerometer” value. The following table summarizes the standby mode supply current for different modes.

Operating Modes and Standby Current

*Ephemeris: a tabular statement of the assigned places of a celestial body for regular intervals.