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M12 Oncore Users Guide Supplement - deetc - isel

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Motorola GPS Products<br />

<strong>M12</strong> <strong>Oncore</strong> User’s <strong>Guide</strong> <strong>Supplement</strong><br />

Revision 1.0 01/25/00<br />

GPGLL (GEOGRAPHIC POSITION-LATITUDE/LONGITUDE)<br />

This command enables the GPGLL Geographic Position-Latitude/Longitude message<br />

and determines the rate at which the information is transmitted. The periodic rate<br />

field (yyyy) instructs the receiver either to output this message once (polled), or to<br />

output this message at the indicated update rate (continuously). Once the receiver is<br />

set to continuous output, the continuous flow can be stopped by sending a one-time<br />

(polled) output request. The receiver will output the response one final time, and<br />

then terminate any further message outputs. The value of the periodic rate is<br />

retained through a power cycle only if battery backup power is applied.<br />

If the receiver has just powered up and has yet to compute a position fix (GPS<br />

quality indicator (q) is zero), then the time field (hhmmss.ss) will be nulled. If the<br />

receiver is not computing a position fix sometime after the first fix (GPS quality<br />

indicator (q) is zero), then the time field (hhmmss.ss) will be frozen.<br />

Default mode: Disabled<br />

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