Lantronix X300 Series X300 Series User Guide Rev B - Page 95

10: Services Parameters Description Elevation Channel 4 (Maximum 90) Example - 51 degrees Azimuth Channel 4 (True, Range 0 - 359) Example - 319 degrees SNR (C/N0) Range 0 - 99, null when not tracking Example - 31 dBHz Checksum *71 End of message termination (1)Depending on the number of satellites tracked, multiple messages of GSV data may be required. In some software versions, the maximum number of satellites reported as visible is limited to 12, even though more may be visible. GPGSA Format The $GPGSA message includes the list of satellites being used. Example: $GPGSA,A,3,18,20,21,22,29,,,,,,,,2.4,1.0,2.2*36 Parameters MID GSA Parameters MID Mode1 Mode2 Satellite Used(1) Satellite Used(1) .... Satellite Used PDOP(2) HDOP(2) VDOP(2) Table 10-10 GSA Data Format Description GSA Protocol Header Example - $GPGSA M - Manual: Forced to operate in 2D or 3D mode A - 2D Automatic: Allowed to automatically switch 2D/3D Example - A 1 - Fix not available 2 - 2D (3 SVs used) Example - 3 SV on Channel 1 Example - 18 SV on Channel 2 Example - 20 .... SV on Channel 12 Position Dilution of Precision Example: 2.4 Horizontal Dilution of Precision Example: 1.0 Vertical Dilution of Precision Example: 2.2 X300 Series IoT Cellular Gateway User Guide 95