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GE863-GPS Software User Guide
1vv0300724 Rev. 2 - 24/01/07
The typical application that permits also to control the GPS part by the GSM modem is the following:
PIN # NAME NAME PIN#
25
TX_TRACE RX_GPS_BIN
78
26
RX_TRACE TX_GPS_BIN
80
This configuration is also settable on the EVK board.
This configuration is defined as “Controlled Mode".
5.3 WGS 84
GPS receivers perform initial position and velocity calculations using an earth-centered earth-fixed
(ECEF) coordinate system. Results may be converted to an earth model (geoid) defined by the
selected datum. For GE863-GPS the default datum is WGS 84 (World Geodetic System 1984) which
provides a worldwide common grid system that may be translated into local coordinate systems or
map datums. (Local map datums are a best fit to the local shape of the earth and not valid worldwide).
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