Previous Topic

Next Topic

Book Contents

Book Index

GGQ - Real-time position with coordinate quality

The GGQ record contains time, position and coordinate quality data for a GNSS receiver. See the following bitmap and spreadsheet for a description of a record:

Fields of the GGA message string

Note – The latitude and longitude are in the datum and ellipsoid of the selected reference frame.

GGQ_record

Field

Description

1

Universal Time Coordinated (UTC) [hhmmss.ss] of position fix

2

Date [mmddyy] of position fix (UTC)

3

Latitude in [DDMM.MMMMMM]

4

Direction of latitude
N: North
S: South

5

Longitude in [DDDMM.MMMMMM]

6

Direction of longitude
E: East
W: West

7

GPS Quality Indicator
0: fix not available
1: Navigation fix
2: Real-Time Kinematic, float integers
3: Real-Time Kinematic, fixed integers

8

Number of GPS satellites being used by both, reference and rover [0 - 12]

9

Quality of coordinates: 3D 3-sigma error in [meter]

10

Ellipsoidal height of fix (of the antenna reference point)

11

M: ellipsoidal height is measured in meters

12

Checksum [00 - FF]

See Also

GGA - Global Positioning System fix data

PTNL,GGK - Global Positioning System fix data (Trimble proprietary)