NaviGPS GT-31/BGT-31 SiRF binary logfile (.sbn) (sbn)
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## NaviGPS GT-31/BGT-31 SiRF binary logfile (.sbn) (sbn)

This format can...

- read tracks

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.

On the device, logging in this format is enabled by choosing SBN from the NMEA ITEMS menu on the MEMORY CARD screen.

Not all data logged in this format is converted by GPSBabel, but the following are:

Position | Fix type (2D/3D/DGPS) | Number of satellites visible
Elevation | Speed | Horizontal Dilution of Precision (HDOP)
Time | Course |

The specification of this format can be found in the SiRF Binary Protocol Reference Manual, in the section called Geodetic Navigation Data - Message ID 41.

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