SHOUT nano User Guide Version A
Document Number: 451-92681-001A
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o
The number inside the parentheses next to
Successes
represents the number of
position reports successfully transmitted but with invalid GPS fix.
The number of
Fails
represents the total number of valid position reports that failed to
send to the Iridium network.
Figure 16: Stats
6.5
A
CCURACY
Use the
Accuracy
option to select either
Standard
or
Best
accuracy when acquiring a 3D
GPS fix. For Standard setting, the SHOUT nano acquires 3D fix using saved ephemeris data
in its nonvolatile memory. The ephemeris is updated only when it becomes invalid. For Best
setting, the SHOUT nano always updates the ephemeris data first before attempting to obtain a
3D fix. The Best setting takes longer for a 3D fix. However, the probability of obtaining position
accuracy to within 2.5 meters is much higher than for the Standard setting. Best setting is not
recommended when operated in environments with limited view of the sky, such as under
heavy foliage. Choosing Best accuracy setting can significantly reduce the total number of
reports on a fully charged battery due to longer GPS acquisition time. Choosing Best accuracy is
the same as setting the report rate to more than two hours. For both cases, the SHOUT nano
has to update the ephemeris data. Refer to
6.6
F
ORMAT
The SHOUT nano can transmit position reports in either 30-byte or 10-byte format. 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,
Clear Stats
(10 min)
Stats
GPS
----
Iridium
-----
Time to Next: 0:00:05:20
Tracking Since: 24-Jul-10
12:00AM
Last Report: 24-Jul-10
04:00PM
Report Cycles: 20
Send Attempts: 22
Successes: 20 (1)
Fails: 2
