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. | 5228K50585 |
| Type | satellite positioning system |
| REGISTRY-Link | ↪ REGISTRY (8571) |
Contacts
| Name | Institution | Role |
|---|---|---|
| Ralf Krocker | Alfred Wegener Institute, Helmholtz Centre 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.
In the registration lab an NMEA stream of GPS records can be received. 4 sockets of RS232 type (DSub9) with following setting are available: 4800 Baud, No Parity, 8 Data Bits, 1 Stop Bit.
NMEA records of type $GPGGA, $GPVTG, $GPZDA, $GPRMC, $GPGLL are provided with 1 Hz.
No subdevices available.
Position
| Info | 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 | O2ARegistry Output Type | Unit |
|---|---|---|
| course over ground | attitude | deg |
| day | date and time | d |
| latitude | latitude | deg |
| month | date and time | mo |
| longitude | longitude | deg |
| year | date and time | a |
| differential reference station ID | index | number |
| GPS quality indicator | quality flag | number |
| number of satellites | index | number |
| speed over ground | speed | knot |
| altitude | distance | m |
Additionally a computer is installed receiving T02 data from this sensor. These data are used to calculate GPS tide. Three different services are available: 1=Uncorrected, 2=Ultra-rapid and 3=Rapid/Final. GPS tide is provided as two column file (date/time, height) to be used by multibeam echo sounder. See more details in Heincke_GPS_Tide_v20191016.pdf.