Attention:
The Trimble GPS receiver provides position data for scientific devices.
Summary
The SPS461 GPS Heading and Positioning Receivers are modular, dual-antenna systems for marine construction and hydrographic survey. It may improve accuracy by using DGPS via SBAS, OmniSTAR VBS, MSK Beacon or external RTCM DGPS corrections. The receiver is equipped with a single GA530 L1/L2/OmniSTAR/Beacon/SBAS antenna. Therefore heading, roll and pitch cannot be calculated.
| Manufacturer | Trimble |
|---|---|
| Model | Trimble Marine SPS461 |
| Serial No. | n/a |
| Type | satellite positioning system |
Contacts
| Name | Institution | Role |
|---|---|---|
| Gerchow, Peter | Alfred-Wegener-Institute | Data Provider |
| Krocker, Ralf | Alfred-Wegener-Institute for Polar and Marine Research | Engineer In Charge |
Components
The GPS receiver is installed on the bridge deck. The antenna is installed on the observation deck.
Position
| Origin Description: | xyz-position of antenna from Alignment Survey Report RV Heincke (January 2016). Antenna located on observation deck, device located on bridge deck. |
| X: | 39.6 m (Positive X axis is forward and along the centerline of the vessel with X0 at the Stern point of the vessel. ) |
| Y: | 2.129 m (Positive Y axis is portside of centerline with Y0 at centerline at the Very stern point of the vessel. ) |
| Z: | 16.433 m (Positive Z axis is upwards of basis. Z0 is set to the hydrophone on midship.) |
Data logging, storage and archiving
Logged parameters
| Parameter | Sensor Output Type | Unit |
|---|---|---|
| latitude | latitude | degree |
| longitude | longitude | degree |
| altitude | distance | m |
| course over ground | attitude | degree |
| day | date and time | day |
| month | date and time | month |
| year | date and time | year |
| differential reference station ID | index | number |
| GPS quality indicator | quality flag | number |
| number of satellites | index | number |
| speed over ground | speed | knots |
Central geographical ship's position and time standard
Time synchronization is done by DShip receiving the data for logging. Still, the data itself contain GPS time information.
Rawdata storage on board
Data storage in DShip system.
| Device name | DGPS Trimble |
| Parameter | Course over ground \[deg\]; DGPS_Debeg.GPGGA.EW; Age of Differential GPS data; Altitude \[m\]; Course over ground \[deg\]; Day; DGPS_Trimble.GPGGA.Sentence; DGPS_Trimble.GPVTG.Sentence; DGPS_Trimble.GPZDA.Sentence; Differential reference station ID; EW; Geoidal separation \[m\]; GPS Quality indicator; Horizontal dilution; Latitude; Local zone hours; Local zone minutes; Longitude; Month; NS; Number of satellites; Speed over ground \[kn\]; UTC of position; UTC Raw; Year |
Data archiving on land
After the cruise the DShip data set can be extracted from https://dms.awi.de.