Raytheon STD 21 GPS Operation Manual page 101

• NMEA 0183 Format GGA
$- - - -GGA,hhmmss.ss,llll.ll,a,yyyyy.yy,a,x,xx,x.x,x.x,M,x.x,M,x.x,xxxx**hh<CR><LF>
Update rate 1 Hz
• NMEA 0183 Format GSA
$- - - -GSA,a,x,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,x.x,x.x,x.x*hh<CR><LF>
Update rate 1 Hz
Edition: Feb. 05, 2007
Satellite Compass
GGA ⇒ Global Positioning System Fix Data
UTC of position
GSA ⇒ GNSS DOP and Active Satellites
Mode:
STD 21 GPS
Horizontal dilution of precision
Number of satellites in use, 00--12,
may be different from the number in view
GPS Quality indicator
Longitude -- E/W
Latitude -- N/S
ID numbers of satellites used in solution
Mode : 1 = Fix not available, 2 = 2D, 3 = 3D
M = Manual, forced to operate in 2D or 3D mode
A = Automatic, allowed to automatically switch 2D/3D
93
Differential reference
station ID, 0000--1023
Age of Differential GPS data
Geoidal separation, meters
Altitude re: mean--sea--level (geoid), meters
VDOP
HDOP
PDOP
3717/110--850.DOC020002
STD 21 GPS