ROVDOG III.5
System features
- 5 pressure cylinders in a frame
- Each cylinder contains a gravimeter, a water pressure sensor, gimbals and electronics
- Gravimeters are of type Scintrex CG-5 or CG-6
- Water pressure sensors are of type Paroscientific Digiquartz 31K, 42K or higher depth rating
- Cable to ROV provides power and two-way communication
- Operator on the vessel controls data acquisition and recording
Benefits of smaller units and increased number of sensors compared to older ROVDOG versions
- Higher precision with the same number of measurements
- Gravity drift errors are effectively reduced by averaging
- Similar precision with fewer measurements
- Resulting in shorter survey time and lower cost
Specifications
- Frame height 850 mm
- Frame diameter 692 mm
- Weight in air 120 kg
- Weight in water 15 kg (adjustable)
- No. of units in the frame 5
- Unit height 557 mm
- Unit diameter 203 mm
- Gravimeters of type Scintrex CG-5 or CG-6
- Repeatability (Scintrex statement): 5 µGal for single sensors
- Repeatability (Quad statement): <1 µGal for 5 sensors (standard deviation)
- Depth rating of cylinders 1500 m or 3000 m
- Depth rating of pressure sensors 680 m, 1370 m, 2060 m or 2750 m
- Sampling interval 6 Hz / 10 Hz
- Integration length 1/6 s – 1/10 s
- Memory capacity: No internal memory, continuous recording on the vessel
- Battery life: Backup batter > 2 hours
ROVDOG III.5
quad staff working on the first rovdog iii.5 launch
