User manual

USB Dongle Series Model:UD-731R

UniTraQ International Corp. RoHS compliance.

2010,08, Version 1.0

7 Satellites Used 08 Number of satellites in use, (00 ~ 12)

8 HDOP 1.1 Horizontal dilution of precision, (00.0 ~ 99.9)

9 Altitude 108.7 mean sea level (geoid), (-9999.9 ~ 17999.9)

10 Geoid Separation Geoid separation in meters according to WGS-84 ellipsoid

(-999.9 ~ 9999.9)

11 DGPS Age Age of DGPS data since last valid RTCM transmission in

xxx format (seconds)

NULL when DGPS not used

12 DGPS Station ID 0000 Differential reference station ID, 0000 ~ 1023

NULL when DGPS not used

13 Checksum 0E

Note: The checksum field starts with a ‘*’ and consists of 2 characters representing a hex

number. The checksum is the exclusive OR of all characters between ‘$’ and ‘*’.

10.2 GLL - LATITUDE AND LONGITUDE, WITH TIME OF POSITION FIX AND STATUS

Latitude and longitude of current position, time, and status.

Structure:

$GPGLL,ddmm.mmmm,a,dddmm.mmmm,a,hhmmss.sss,A,a*hh<CR><LF>

1 2 3 4 5 6 7 8

Example:

$GPGLL,4250.5589,S,14718.5084,E,092204.999,A,A*2D<CR><LF>

Field Name Example Description

1 Latitude 4250.5589 Latitude in ddmm.mmmm format

Leading zeros transmitted

2 N/S Indicator

S Latitude hemisphere indicator

‘N’ = North

‘S’ = South