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 DGPS Trimble + u-blox
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rodrigofrs

Brazil
4 Posts

Posted - 17 avr. 2012 :  17:48:48  Show Profile  Reply with Quote
Hi,

I'm working in a DGPS system, using a TRIMBLE netr9 as a base station and a u-blox LEA-6T as a rover. I've configured the base station to broadcast over tcp/ip RTCM correction and e put this correction on the usb port of my rover. I was expecting for something nearst to 0,5m of accuracy on my rover bus i've got something about 2m. Could you help me on this? Just to make you know, i need positioning in real-time and better accuracy.

thank you,

Rodrigo Fonseca

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rodrigofrs

Brazil
4 Posts

Posted - 17 avr. 2012 :  19:29:50  Show Profile  Reply with Quote
Configuration i've made on trimble net r9:

Elevation Mask: 10°
PDOP Mask: 99
Horizontal Precision: 0.30 [m]
Vertical Precision: 0.30 [m]
Clock Steering: Enabled
Everest™ Multipath Mitigation: Enabled
Antenna ID: 265
Antenna Type: Zephyr Geodetic 2 RoHS
Antenna Measurement Method: Antenna Phase Center
Antenna Height: 1.305 [m]
1PPS On/Off: Enabled
Event 1 On/Off: Disabled
Event 1 Slope: Positive
External Frequency Available: Undetected
RTK Mode: Low Latency
Motion: Static
CMR Input Filter: Disabled
Reference Latitude:
Reference Longitude:
Reference Height: 808.730 [m]
RTCM 2.x ID: 3
RTCM 3.x ID: 0
CMR ID: 0
Station Name: TRIMBLE
Ethernet IP: 150.164.3.118
System Name: Trimble
DNS Resolved Name: ----
Serial Number: 5152K81084
Firmware Version: 4.46



I/O : TCP

Output only/Allow multiple connections

RTCM - enable - version: 2.3 type: DGPS

Advanced Settings

Ephemeris Holdoff: 300s
Record Type 1: 60s
Record Type 31: 60s
Record Type 3: 10min
Record Type 32: 10min
GLONASS Datum: PZ90
Other Record Types: ticked
CR/LF: ticked


REFERENCE STATION:

CMR ID: 0
RTCM 2.x ID: 3
RTCM 3.x ID: 0

TRACKING:

Elevation Mask: 10°
EverestTM: Enable
Clock Steering: Enable

GPS L1-CA
GPS L2-Legacy


Elevation Mask: 10°
PDOP Mask: 99
Horizontal Precision: 0.30 [m]
Vertical Precision: 0.30 [m]
Clock Steering: Enabled
Everest™ Multipath Mitigation: Enabled
Antenna ID: 265
Antenna Type: Zephyr Geodetic 2 RoHS
Antenna Measurement Method: Antenna Phase Center
Antenna Height: 1.305 [m]
1PPS On/Off: Enabled
Event 1 On/Off: Disabled
Event 1 Slope: Positive
External Frequency Available: Undetected
RTK Mode: Low Latency
Motion: Static
CMR Input Filter: Disabled
Reference Latitude: 19°52'09.36274"S
Reference Longitude: 43°57'53.74521"W
Reference Height: 808.730 [m]
RTCM 2.x ID: 3
RTCM 3.x ID: 0
CMR ID: 0
Station Name: TRIMBLE
Ethernet IP: 150.164.3.118
System Name: Trimble
DNS Resolved Name: ----
Serial Number: 5152K81084
Firmware Version: 4.46

Configuration on the rover

PRT

protocol in: UBX+NMEA+RTCM
protocol out: UBX+NMEA

NAV:

DGP Timeout: 30s

MSG (Messages):

NAV-SOL
NAV-STATUS
NAV-DGPS
RXM-RAW
RXM-SFRB
NMEA
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astrodanco

USA
8 Posts

Posted - 25 mai 2013 :  10:57:51  Show Profile  Reply with Quote
This requires firmware version 7 on the u-blox LEA-6T. It won't work on mine which has version 6.02. Bummer.
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