The CEE-USV™ can accept GNSS data from an external, third party receiver by Bluetooth or cabled connection.
These GPS options present cost-effective built-in positioning for applications where precise vertical elevation is not required and 0.5 – 2m position accuracy is adequate. Such applications include industrial water surveys, reconnaissance surveys, and volume calculations where water volume can be measured accurately without requiring precise absolute position:
Hemisphere Crescent Marine Beacon – Single frequency L1 GPS receiver for cost effective USV surveying where differential corrections may be supplied by free SBAS systems such as WAAS or EGNOS. May also be used with MSK marine beacon corrections for a differential (DGPS) solution. Standard configuration includes 10Hz position update rate. Supplied with the Hemisphere A31 antenna with beacon.
NovAtel OEMStar – Single frequency L1 GNSS receiver with GLONASS satellite tracking offering a more robust basic-level solution where there may be partial obstruction of the sky, such as under tree canopy. Standard configuration includes 10Hz position update rate. Supplied with the NovAtel GPS-701-GG ant
Decimeter Accuracy (L-Band):
The subscription L-Band GNSS option brings up to 10cm precision to the CEE-USV™ position data with no requirement for a base station. Using both GPS and GLONASS satellites, performance with a restricted sky view is greatly superior to submeter SBAS systems.
Hemisphere Eclipse II (Atlas) – This GNSS option presents a new approach to obtaining accurate decimeter positioning anywhere in the world. The CEE-USV™ with Hemisphere ECLIPSE is supplied with a basic level (L1 only) capability. A separate subscription to the the Atlas L-Band correction service activates the dual frequency L1/L2 receiver operation, GLONASS signal reception, and the Atlas corrections themselves. This approach allows the user to minimize capital investment in GNSS hardware, and only pay for required accuracy when needed.
Centimeter Accuracy – NovAtel:
These multi frequency NovAtel OEMV6 receiver options offer centimeter-level precision and accurate elevation measurements for recording of “RTK tides”. Both options allow internal recording of raw GNSS pseudorange data for post processed precise positioning using Continuously Operating Reference Station (CORS) derived corrections.
NovAtel 628 – Multi frequency L1/L2/L5 GNSS option with internal RAW data recording to allow post processing to an accurate solution without the need for a local RTK base station. with L-Band corrections for better than 10 cm accuracy with a subscription to the TerraStar corrections service. The L-band option is typically selected where free SBAS or beacon corrections are unavailable and it is not practical or necessary to set up a local RTK base station. Supplied with the NovAtel GPS-702-GGL antenna.
NovAtel 628 RTK – Multi frequency L1/L2/L5 GNSS receiver with RTK capability, allowing the CEE-USV™ to connect to a local RTK base station and receive real time kinematic differential corrections for cm-level precision. Typically selected when water surface elevation (tide) is being measured using the satellite positioning system and not traditional (eg tide gauge) methods.
Centimeter Accuracy – Trimble:
For hydrographic surveying within existing Trimble® infrastructure, the CEE-USV™ RTK-BD970 using the Maxwell™ 6 receiver technology will facilitate trouble-free connectivity with Trimble base station receivers. For users who are keen to maintain equipment consistency and interoperability, the Trimble CEE-USV™ option was developed to fit seamlessly into existing networks.
Trimble BD970 – This advanced receiver installed inside the CEE-USV™ data module features an Ethernet input allowing use of cell phone network corrections (Trimble CenterPoint™ RTX) from an NTRIP caster, and will receive CMRx – and all other – format RTK corrections from a Trimble base station. The latest generation rugged GA 830 antenna is supplied, although this option may also be ordered without an antenna or firmware activation for dealer supply.
RTK UHF Radio:
A Satel 400-470 MHz UHF radio is installed inside the CEE-USV™ data module to seamlessly receive RTK correction from the base station for all RTK GNSS options.