Gps/Waas Satellites In View - NorthStar 2201 Installation Manual

APPENDIX B 2201/NMEA communication protocols
GPS/WAAS
satellites in view
Header
$GPGSV
Page 40
GPS Satellites in View: Number of SVs in view, PRN numbers,
elevation, azimuth and SNR values. Four satellites maximum
per transmission, additional satellite data sent in second or
third sentence.
Contents of data fields
,x,x,xx,xx,xx,xxx,xx..........,xx,xx,xxx,xx.x*hh<CR><LF>
nd
2
SNR (Note 1)
Azimuth, Degrees (Note 2)
Elevation, Degrees (Note 3)
Satellite ID Number (Note 4)
Total Satellites in View
Message Number, 1 to 3
Total Number of Messages, 1 to 3
Note 1: SNR (C/No) 00-99 dB, null when not tracking.
Note 2: Azimuth, range 000 to 359 degrees.
Note 3: Elevation, range 00 to 90 degrees.
Note 4: GPS satellites are identified by SV #1 to 32.
WAAS satellites have reserved SV # 33 to 64.
WAAS PRN 120-138 are mapped to SV 33 through 51. Only
WAAS PRN 120, 122, 134 have been operational.
Example:
GPS Satellites in View Data sentence.
$GPGSV,2,1,06,03,12,238,06,07,82,008,15,11,04,053,,27,43,178,12*7F<
CR><LF>
Messages
Msg. No.
SV Visible
PRN
Elevation
Azimuth
SNR
PRN
Elevation
th
4 SV
rd
-3 SV
2
1
6
03
12
238
6 dB
07
82
2201 INSTALLATION MANUAL, Revision B