Table of Contents
Advertisement
satellite orbital data to achieve maximum acquisition
performance. If significant inaccuracy exists in the initial
data, or if the orbital data is obsolete, it may take from 5 to
15 minutes to achieve a navigation solution. The GPS 30/
30 SL AutoLocate
TM
feature is capable of automatically
determining a navigation solution without intervention from
the host system. However, acquisition performance can be
improved if the host system initializes the GPS 30/30 SL
following the occurrence of one or more of the following
events:
1) Transportation over distances further than 1500
kilometers
2) Failure of the internal memory battery without system
standby power
3) Stored date/time off by more than 30 minutes
See Section 4 for more information on initializing the GPS
30/30 SL.
2.3 NAVIGATION
After the acquisition process is complete, the GPS 30/30
SL will begin sending valid navigation information over its
output channels. These data include:
1) Latitude/longitude/altitude
2) Velocity
3) Date/time
4) Error estimates
5) Satellite and receiver status
Normally the GPS 30/30 SL will select the optimal navigation
mode (2D or 3D) based on available satellites and geometry
considerations.
The host system, at its option, may
command the GPS 30/30 SL to choose a specific mode of
navigation, such as 2D. The following modes are available:
7
Advertisement
Table of Contents
