DNA/DNR-IRIG-650 IRIG Timing Layer
Chapter 3
46
Programming with the Low Level API
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Vers:
4.6
Date: March 2019
DNx-IRIG-650 Chap3x.fm
© Copyright 2019
United Electronic Industries, Inc.
GSV - Satellites in view
Number of satellites in view, satellite ID (PRN) numbers, elevation, azimuth, and
SNR value. The information for four satellites is a maximum per one message,
additional messages up to maximum of eight are sent if needed. The satellites
are in PRN number order
Example:
$GPGSV,3,1,11,29,68,228,47,30,59,151,47,31,44,284,45,02,38
,062,44*7C
$GPGSV,3,2,11,12,28,130,41,10,14,102,35,05,12,110,35,04,11
,040,34*70
$GPGSV,3,3,11,21,05,196,29,16,05,297,28,13,02,021,30*4E
Format:
GSA - DOP and Active Satellites
GPS receiver operating mode, satellites used in the navigation solution reported
by the GGA sentence, and DOP values
Example:
$GPGSA,A,3,02,21,30,04,16,05,10,12,31,29,,,1.33,0.81,1.06*
02
Format:
$GPGSV,n,m,ss,xx,ee,aaa,cn,………….
,xx,ee,aaa,cn*hh<CR><LF> n
Total number of messages, 1 to 9
m
Message number, 1 to 9
ss
Total number of satellites in view
xx
Satellite ID (PRN) number
ee
Satellite elevation, degrees 90 max
aaa
Satellite azimuth, degrees True, 000 to 359
ch
Signal-to-noise ratio (C/No) 00-99 dB-Hz. Value of zero
means that the satellite is predicted to be on the visible
sky but it isn't being tracked.
$GPGSA,a,b,xx,xx,xx,xx
,xx,xx,xx,xx,xx,xx,xx,
xx,p.p,h.h,v.v*hh<CR><
LF> a
Mode: M = Manual, forced to operate in 2D or 3D mode. A = Automatic,
allowed to automatically switch 2D/3D.
b
Mode: 1 = Fix not available, 2 = 2D, 3 = 3D
xx
ID (PRN) numbers of GPS satellites used in solution
p.p
PDOP
h.h
HDOP
v.v
VDOP