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  {block name=title}GPSBabel development:NaviGPS GT-31/BGT-31 SiRF binary logfile (.sbn) (sbn){/block}
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  <div xmlns="http://www.w3.org/1999/xhtml" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">NaviGPS GT-31/BGT-31 SiRF binary logfile (.sbn) (sbn)</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="fmt_sbp.html">Prev</a> </td><th width="60%" align="center">Chapter 3. The Formats</th><td width="20%" align="right"> <a accesskey="n" href="fmt_naviguide.html">Next</a></td></tr></table><hr /></div><div xmlns="http://www.w3.org/1999/xhtml" class="section"><div class="titlepage"><div><div><h2 class="title" ><a id="fmt_sbn"></a>NaviGPS GT-31/BGT-31 SiRF binary logfile (.sbn) (sbn)</h2></div></div></div><p class="fmtcapshdr">
    This format can...
    </p><div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p class="fmtcapsitem">
          read tracks
        </p></li></ul></div><p>
	This format is for SBN datalog files saved to the SD card by
	the Locosys GT-11/BGT-11/GT-31/BGT-31 GPS receivers.
</p><p>
	On the device, logging in this format is enabled by choosing
	SBN from the NMEA ITEMS menu on the MEMORY CARD screen.
</p><p>
	Not all data logged in this format is converted by GPSBabel,
	but the following are:

</p><table border="0" summary="Simple list" class="simplelist"><tr><td>Position</td><td>Fix type (2D/3D/DGPS)</td><td>Number of satellites visible</td></tr><tr><td>Elevation</td><td>Speed</td><td>Horizontal Dilution of Precision (HDOP)</td></tr><tr><td>Time</td><td>Course</td><td> </td></tr></table><p>
</p><p>
	The specification of this format can be found in
	the <a class="ulink" href="http://www.navmanwirelessoem.com/oem/customer-support/oem-news/product-briefs-and-data-sheets/jupiter-32-xlp-new2/sirf-binary-protocol-reference-manual" target="_top">
	SiRF Binary Protocol Reference Manual</a>, in the section
	called Geodetic Navigation Data - Message ID 41.
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