Table des Matières
Publicité
GSA
GPS receiver operating mode, satellites used in the navigation solution reported by the
$--GGA sentence, and DOP values.
1 2 3
GSA,a,x,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,x.x,x.x,x.x*hh<CR><LF>,
1
2
3-4
5
6
7
GSV
Number of satellites (SV) in view, PRN numbers, elevation, azimuth and SNR value. Four
satellites maximum per transmission, additional satellite data sent in second or their
message. Total number of messages being transmitted and the number of messages being
transmitted is indicated in the first two fields.
1 2 3 4 5 6 7 8
GSV,x,x,xx,xx,xx,xxx,xx..........xx,xx,xxx,xx*hh<CR><LF>
1
2
3
4
5
6
7
8-9
10-11 4th SV
Notes: 1) Satellite information may require the transmission of multiple messages. The first
field specifies the total number of messages, minimum value 1. The second field identifies
the order of this message (message number), minimum value 1.
2) A variable number of "PRN-Elevation-Azimuth-SNR" sets are allowed up to a
maximum of four sets per message. Null fields are not required for unused sets when less
than four sets are transmitted.
56
GPS DOP and Active Satellites
Mode: M=Manual, forced to operate in 2D or 3D mode,
A=Automatic, allowed to automatically switch 2D/3D
Mode: 1= Fix not available, 2=2D, 3=3D
PRN numbers of satellites used in solution (null for unused fields)
PDOP
HDOP
VDOP
GPS Satellites in View
910
11
Total number of messages, 1 to 3
Message number, 1 to 3
Total number of satellites in view
Satellite PRN number
Elevation, degrees, 90° maximum
Azimuth, degrees True, 000 to 359
SNR (C/No) 00-99 dB, null when not tracking
2nd-3rd SV
4 5 6 7
Magellan GPS 315/GPS 320
Publicité
Table des Matières
