u-blox ZED-F9P Interface Description - Manual
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4.2 Standard Messages
Standard Messages: i.e. Messages as defined in the NMEA Standard.
4.2.1 DTM
4.2.1.1 Datum Reference
Message
DTM
Description
Datum Reference
Firmware
Supported on:
•
u-blox 9 with protocol version 27
Type
Output Message
Comment
This message gives the difference between the current datum and the reference datum.
The current datum defaults to WGS84.
The reference datum cannot be changed and is always set to WGS84.
ID for CFG-MSG
Number of fields
Message Info
0xF0 0x0A
11
Message Structure:
$xxDTM,datum,subDatum,lat,NS,lon,EW,alt,refDatum*cs<CR><LF>
Example:
$GPDTM,W84,,0.0,N,0.0,E,0.0,W84*6F
$GPDTM,999,,0.08,N,0.07,E,-47.7,W84*1C
Field
No.
Name
Unit
Format
Example
Description
0
xxDTM
-
string
$GPDTM
DTM Message ID (xx = current Talker ID)
1
datum
-
string
W84
Local datum code: W84 = WGS84, 999 = user
defined
2
subDatum
-
string
-
A null field
3
lat
min numeric
0.08
Offset in Latitude
4
NS
-
character
S
North/South indicator
5
lon
min numeric
0.07
Offset in Longitude
6
EW
-
character
E
East/West indicator
7
alt
m
numeric
-2.8
Offset in altitude
8
refDatum
-
string
W84
Reference datum code (always W84 = WGS 84)
9
cs
-
hexadecimal
*67
Checksum
10
<CR><LF>
-
character
-
Carriage return and line feed
UBX-18010854 - R04
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