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Attention:

Trimble 1 and Trimble 2 GPS Receivers are operated by ship's command only.

The sensor is essential device providing position data for a large number of scientific devices. Most sensors do not directly receive positions from GPS sensor but from motion sensor Hydrins.

The system TRIMBLE 1 / HYDRINS 1 and TRIMBLE 2 / HYDRINS 2 are alternatively sending positions to the customers. DShip is logging positions from both GPS receivers in parallel.

Summary

The Trimble SPS855 is a combined radio and GPS receiver. It uses all currently available satellite signals including L1, L2 and the GPS modernized L2C code.
Position data can be received from GPS receiver via terminal server on every ethernet socket on board. Records are provided in NMEA style of type $GPGGA, $PGGLL, $GPVTG, $GPZDA.
Position data can also be received by DShip online export stream on every ethernet socket on board. The format of export stream is of NMEA style, but user can define an individual parameter composition.

Trimble 1

ManufacturerTrimble
ModelSPS855
Serial No.n/a
Typesatellite positioning system



Trimble 2

ManufacturerTrimble
ModelSPS855
Serial No.n/a
Typesatellite positioning system




Contacts

NameInstitutionRole
Ralf KrockerAlfred-Wegener-Institute for Polar and Marine ResearchData Provider
Reederei LaeiszReederei LaeiszEngineer In Charge

Components

There are two independent systems installed, called TRIMBLE 1 and TRIMBLE 2. Both consist of an antenna Zephyr Model 2 Rugged. The receivers are of type SPS855. Antennas are installed on antenna deck above bridge. The two receivers are installed in scientific panel on bridge. TRIMBLE 1 is sending NMEA0183 telegrams to motion sensor HYDRINS 1 and DShip. TRIMBLE 2 is sending telegrams to motion sensor HYDRINS 2 and DShip.

Position

Trimble 1

Origin Description:xyz-position of antenna from Alignment Survey Report RV Polarstern (June 2016, p59), located on upper observation deck
X:78.753 m
(X-0 is at the center of der rudder (ref. design drawing of the vessel), positive X-axis is forward and along vessel centerline)
Y:-8.635 m
(Y-0 at centerline, positive Y-axis is portside)
Z:33.37 m
(Z-0 is set to the lowest point of the keel, positive Z-axis is upwards)

Trimble 2

Origin Description:xyz-position of antenna from Alignment Survey Report RV Polarstern (June 2016, p59), located on upper observation deck
X:72.503 m
(X-0 is at the center of der rudder (ref. design drawing of the vessel), positive X-axis is forward and along vessel centerline)
Y:9.233 m
(Y-0 at centerline, positive Y-axis is portside)
Z:33.383 m
(Z-0 is set to the lowest point of the keel, positive Z-axis is upwards)

Data logging, storage and archiving

Logged parameters

ParameterSensor Output TypeUnit
latitudelatitudedegree
longitudelongitudedegree
speed made gooddurationknots
GPS quality indicatorquality flagunknown
datedate and timeunknown
timedate and timegmt
courseattitudedegree
number of satellitesquality flagunknown

Central geographical ship's position and time standard

GPS receiver TRIMBLE 1 is running as time server for several clients on board.
GPS positions of TRIMBLE 1 and TRIMBLE 2 are centered to the corresponding antenna.

Rawdata storage on board

Data storage in DShip system.

Dship

Unevaluated and uncorrected measurement data.

Device name

trimble 1 GPS
trimble 2 GPS

Parameters

course made good [°]; Date; day; EW; GPS quality indicator; month; NS; number of satellites in fix; position latitude [°]; position longitude [°]; raw time; speed made good [kn]; Time; UTC raw [s]; year

Data archiving on land

After the cruise the DShip data set can be extracted from https://dms.awi.de.

File format(s)

*.txt

Calibration certificates

NO

Documentation





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