GMM-U1 Datasheet, PDF (19/36 Pages) List of Unclassifed Manufacturers – GPS Module

GlobalTop Technology
Gmm-u1 Data Sheet
19 _{Ver. V0G}
GSA—GNSS DOP and Active Satellites
Table-4 contains the values for the following example：
$GPGSA,A,3,29,21,26,15,18,09,06,10,,,,,2.32,0.95,2.11*00
Name
Message ID
Mode 1
Mode 2
Satellite Used
Satellite Used
....
Satellite Used
PDOP
HDOP
VDOP
Checksum
<CR> <LF>
Table-4: GSA Data Format
Example Units
Description
$GPGSA
GSA protocol header
A
See Table-5
3
See Table-6
29
SV on Channel 1
21
SV on Channel 2
….
….
....
SV on Channel 12
2.32
Position Dilution of Precision
0.95
Horizontal Dilution of Precision
2.11
Vertical Dilution of Precision
*00
End of message termination
Value
M
A
Table-5: Mode 1
Description
Manual—forced to operate in 2D or 3D mode
2D Automatic—allowed to automatically switch 2D/3D
Value
1
2
3
Table-6: Mode 2
Description
Fix not available
2D (＜4 SVs used)
3D (≧4 SVs used)
This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without
prior permission of GlobalTop Tech Inc. Specifications subject to change without prior notice.
Copyright © 2011 GlobalTop Technology Inc. All Rights Reserved.