NAL SHOUT ts, User Manual, Page: 37 / 62

SHOUT ts User Guide Version B
Document Number: 451-92854-001B 37 of 62
Emergency 911 button at any time during tracking mode or non-tracking mode. The SHOUT
ts can also be turned on at any time and used as a texting device.
When waking up to transmit a location report and the Iridium link is used, the SHOUT ts
antennas must have a full view of the sky; otherwise, it will fail to send. By default, a failed
report will not be resent. Using the Q Rpt menu, failed reports can be forced to stay in the
Outbox awaiting to be resent (see the Outbox section).
The entire reporting duration can take up to two minutes depending on the Iridium satellite
visibility and the validity of the GPS ephemeris data. Ephemeris data saved on the GPS
receiver is valid for approximately two hours, allowing the receiver to obtain a hot-start fix.
Report rate (time between reports) set to more than two hours forces the GPS receiver into
either a warm-start or cold-start fix (~29 seconds). As a result, the SHOUT ts consumes
more battery power and the total number of reports is reduced. For more information, see
Appendix C: Power Consumption .
Important: The SHOUT ts automatically resends all failed messages in the Outbox after a
successful position report transmission. To avoid draining the battery unintentionally, carry
out frequent maintenance on the Outbox and delete unwanted failed messages.
The SHOUT ts logs and saves all position reports in its circular memory. When its memory is
full, the oldest report is overwritten. SatTerm can be used to retrieve all position reports
saved on the SHOUT ts.
6.2 F
ORMAT
The SHOUT ts can transmit position reports in either 30-byte or 10-byte format. Both
of these formats are backward compatible with the SHOUT nano.
The 30-byte format includes Coordinated Universal Time (UTC) date, UTC time, latitude,
longitude, altitude, speed, course, vertical velocity, number of satellites used to obtain 3D
fix, Horizontal Dilution of Precision (HDOP), and Vertical Dilution Of Precision (VDOP).
Latitude and longitude are recorded with about 0.18 meters in resolution.
The 10-byte format includes UTC time, latitude, longitude, and Position (3D) Dilution Of
Precision (PDOP). With UTC date omitted, the SHOUT ts relies on the NOC server to stamp
the date as the report arrives. Encryption is not available with the 10-byte format. Latitude
and longitude are recorded with about 1.1 meters in resolution. The 10-byte format is
selected strictly for the purpose of Iridium airtime cost-saving.
The SHOUT ts can also send position reports and text messages in PMS. The PMS complies
with the Blue Force Tracking Data Format Specification. The SHOUT ts is shipped without