TW5340 User Manual
35
©2014 -2015 Tallysman Wireless, Inc.
Confidential
GSV
GSV - Satellites in view
These sentences describe the sky position of a UPS satellite in view. Typically they’re
shipped in a group of 2 or 3.
Field:
Total number of GSV messages to be transmitted in this group
Origin number of this GSV message within current group
Total number of satellites in view (leading zeros sent)
Satellite PRN number (leading zeros sent)
Elevation in degrees (00-90) (leading zeros sent)
Azimuth in degrees to true north (000-359) (leading zeros sent)
SNR in dB (00-99) (leading zeros sent) more satellite info quadruples like 4-7 n)
checksum
Example: $GPGSV,3,1,11,03,03,111,00,04,15,270,00,06,01,010,00,13,06,292,00*74
$GPGSV,3,2,11,14,25,170,00,16,57,208,39,18,67,296,40,19,40,246,00*74
$GPGSV,3,3,11,22,42,067,42,24,14,311,43,27,05,244,00,,,,*4D
Some GPS receivers may emit more than 12 quadruples (more than three GPGSV
sentences), even though NMEA-0813 doesn’t allow this. (The extras might be WAAS
satellites, for example.) Receivers may also report quads for satellites they aren’t
tracking, in which case the SNR field will be null.
