MTD2000 AT Command Guide R12
Confidential
DAVISCOMMS (S) PTE LTD
100 /105
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
Example:
$GPGSA,A,3,06,10,15,16,21,25,30,,,,,,2.1,1.2,1.8*38
26.1.4
GSV – Satellites in View
It shows the number of satellites in view, satellite ID (PRN) numbers, elevation, azimuth,
and SNR value. The satellites are in PRN number order.
Before a position fix is acquired the information contains only the SNR (Signal to Noise
Ratio) value. After a fix is acquired, the elevation and azimuth angles will be added. Note
that there can be also “theoretical” satellites in the GSV message. These are satellites of
which the angles (elevation, azimuth) are known but for some reasons, e.g. due to an
obstruction, have not been found by the GPS receiver. The SNR value for these
satellites is therefore zero.
Syntax:
$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
cn
SNR ( C/No) 00-99 dB-Hz. zero when not tracking
Examples:
$GPGSV,4,1,14,03,66,207,50,08,09,322,44,11,01,266,42,14,00,155,00*
79
$GPGSV,4,2,14,15,41,088,48,17,21,083,44,18,57,087,51,21,57,173,50*
78
$GPGSV,4,3,14,22,05,203,00,23,52,074,49,26,17,028,44,27,00,300,00*
79
$GPGSV,4,4,14,28,32,243,00,31,48,286,00*70