Options
Gradiometer Approved
A magnetic gradiometer measures magnetic gradient in one dimension by taking the difference between two independent magnetic sensors. Since the Earth’s magnetic field is three dimensional, up to three independent gradient directions can be measured – vertical, horizontal (across-track) and longitudinal (along-track).
SeaSPY sensors are highly accurate and repeatable, making them ideal for gradiometers. In addition, all SeaSPY magnetometers are compatible, so you can upgrade your magnetometer to the gradiometer configuration of your choice, as you need to.
Horizontal or Vertical Transverse Gradiometer
Our transverse gradiometers connect the sensors with a rigid 1.5m structure. They are well suited for close-in, precision surveys for small ferrous targets where short sensor separation is required.
Longitudinal Gradiometer
Longitudinal gradiometers provide the largest variation in available baselines, from 2m to over 500m. Our communication transceiver technology is unmatched in its ability to support extremely long distances between the two towfish.
Long baselines provide superior gradient measurement sensitivity and increased detection range. Longitudinal gradiometers are also extremely hydrodynamically stable. They are well suited for geophysical survey, where the sources of interest are deep and physically large.
Altitude Measurement
SeaSPY magnetometers are equippable with an integrated pressure-depth sensor and a 200kHz echosounder-altimeter. These tools allow accurate positioning of the magnetometer tow body in the water column in real time, a requirement for many geophysical and archaeological surveys.
Deeptow Options
SeaSPY magnetometers are available in 1000m, 3000m and 6000m depth-rated housings.
Options
- Pressure Sensor
- Altimeter
- Transponder
- SideScan integration
- Depth options: 3000m, 6000m
- Extension cables
- Change the weight of the towfish with additional weights
- Deck cable
- Termination kit
- Winches
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