NMEA Manual based on MediaTek chipset - Manual
FTX-HW-13002-A
Preliminary
Page 7 of 39
Message starting with “$GNGSV” will be output in IT530M default mode, including both GPS and
Glonass constellation satellite data.
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:
$GPGSV,n,m,ss,xx,ee,aaa,cn,…………. ,xx,ee,aaa,cn*hh<CR><LF>
Type
Description
n
Total number of messages, 1 to 9
m
Message number, 1 to 9
ss
Total number of satellites in view
xx
Satellite ID (PRN) number
ee
Satellite elevation, degrees 90 max
aaa
Satellite azimuth, degrees True, 000 to 359
ch
Signal-to-noise ration (C/No) 00-99 dB-Hz. Value of zero means that the satellite is predicted to
be on the visible sky but it isn't being tracked.
1.7
GSA - DOP and Active Satellites
GPS receiver operating mode, satellites used in the navigation solution reported by the GGA sentence, and DOP
values.
Message starting with “$GNGSA” will be output in IT530M default mode including both GPS and
Glonass constellation satellite data.
Example:
$GPGSA,A,3,02,21,30,04,16,05,10,12,31,29,,,1.33,0.81,1.06*02
Example IT530M hybrid mode:
$GNGSA,A,3,26,21,16,22,18,06,19,15,30,03,07,08,1.03,0.55,0.87*1D
$GNGSA,A,3,78,71,80,86,65,79,88,87,72,,,,1.03,0.55,0.87*19
Format:
$GPGSA,a,b,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,p.p,h.h,v.v*hh<CR><LF>
Type
Description
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
