Moog Crossbow NAV440 Series - Manual (Page 103)

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7430‐0131‐01 Rev. F
Page 103 NAV440 User Ma l
Appendix A. NMEA Message Format
The GPS receiver outputs data (from a 440 unit) in NMEA‐0183 format at 9600 Baud, 8 bits, no parity bit, and 1 stop
bit. Pack
s section: et formats are described in thi
• GGA—GPS Fix Data, page 103
• Output Packet Format—Internal GPS, page 104
NOTE: NMEA protocol is not recommended for airborne applications; NMEA protocol does not provide vertical
velocity, the vertical velocity that the 440 Series estimates (based upon GPS altitude changes) may not be
sufficient for airborne applications.
GGA—GPS Fix Data
Time and position, together with GPS fixing related data (number of satellites in use, and the resulting HDOP, age of
differential data if in use, etc.).
$GPGGA,hhmmss.ss,Latitude,N,Longitude,E,FS,NoSV,HDOP,msl,m,Altref,m,DiffAge,DiffStation*cs<
CR>
Table 97 NMEA Message Format
ASCII String Name
Format Example
Description
$GPGGA string $GPGGA Message ID:
GGA protocol header
hhmmss.ss hhmmss.s s s 092725.00 UTC Time: Current time
Latitude dddmm.mmmm 4717.11399 Latitude: Degrees + minutes
N character N N/S Indicator:
=south N=north or S
Longitude dddmm.mmmm 00833.91590 Longitude:
es Degrees + minut
E charac er t E E/W indicator:
E=east or W=west
FS 1 digit 1 Position Fix Indicator
8 (Refer to Table 9 below)
NoSV numeric 8 Satellites Used:
Range 0 to 12
HDOP numeric 1.01 HDOP: Horizontal Dilution of Precision
msl numeric 499.6 MSL Altitude (m)
m character M Units: Meters (fixed field)