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Verifying DGPS mode with U-center using M8P-RTK XL


#1

Hello,

We are using two M8P RTK XL with two radio telemetry 433Mhz and we use it with U-center. We are able to use one gps with U-center and we configured the two in order to have one base and one rover. We followed the drotek tutorial for this. Now we would like to know if they are communicating and if we are in DGPS mode. Is there a way to verify it with U-Center? or do we need another software?

Best regards


#2

Your question is not clear, you want to determine the RTK status in Rover? If true, the Rover side needs to send $ GPGGA at the NMEA output, then you can use Ublox-Center to determine the RTK status.

NMEA-0183 message: GGA

Related Topics

Time, position, and fix related data

An example of the GBS message string is:

$GPGGA,172814.0,3723.46587704,N,12202.26957864,W,

2,6,1.2,18.893,M,-25.669,M,2.0,0031*4F

Note – The data string exceeds the NMEA standard length.

GGA message fields

Field Meaning
0 Message ID $GPGGA
1 UTC of position fix
2 Latitude
3 Direction of latitude:

N: North

S: South|
|4|Longitude|
|5|Direction of longitude:

E: East

W: West|
|6|GPS Quality indicator:

0: Fix not valid

1: GPS fix

2: Differential GPS fix, OmniSTAR VBS

4: Real-Time Kinematic, fixed integers

5: Real-Time Kinematic, float integers, OmniSTAR XP/HP or Location RTK|
|7|Number of SVs in use, range from 00 through to 24+|
|8|HDOP|
|9|Orthometric height (MSL reference)|
|10|M: unit of measure for orthometric height is meters|
|11|Geoid separation|
|12|M: geoid separation measured in meters|
|13|Age of differential GPS data record, Type 1 or Type 9. Null field when DGPS is not used.|
|14|Reference station ID, range 0000-4095. A null field when any reference station ID is selected and no corrections are received[1](javascript:void(0);).|
|15|The checksum data, always begins with *|

Note – If a user-defined geoid model, or an inclined plane is loaded into the receiver, then the height output in the NMEA GGA string is always the orthometric height (height above a geoid). The orthometric height is output even if no user-defined geoid is loaded (there is a simplified default geoid in the receiver), or if a user-defined geoid is loaded, or if an inclined plane is used.