Terraquest utilizes an economical Cessna 206, a proven workhorse, for large regional surveys right down to targeted, site-specific survey blocks. Short lines and low terrain clearance are not a problem with the slow speed and enhanced manoeuverability provided by the Robertson STOL kit as shown in the following case studies:
Case Example 1: On one survey Terraquest flew over 40 “postage stamp” blocks (each 1×1 km) spread out over 400 kilometres under estimated time and cost budget.
Case Example 2: Using the U206 Terraquest flew 15,000 line kilometres with terrain clearances of 27 metres over smooth terrain and 22 metres over flat string bog.
These features combined with the measured horizontal gradient to map responses between the lines, create a challenge to most drone surveys.
The Cessna has been specially modified with long range fuel cells, Robertson STOL kit, two camera ports, tundra tires, cargo door and an array of sensors to carry out airborne geophysical surveys.
- Positioning: Accurate real-time corrected differential GPS navigation and data recovery
- Magnetics: Horizontal Gradiometer (Up to three cesium magnetometers)
- New Matrix Digital VLF-EM (data can be inverted to produce resistivity maps, sections and depth slices for each frequency)
- Optional Hyperspectral and Lidar capability
Benefits of the U206 include:
- Lightweight aircraft capable of long flights
- High wing, ideal for northern gravel runways
- Fixed landing gear eliminating the requirement for time consuming gear swings
- Excellent record of quality data acquisition
- Excellent cold weather aircraft (for a piston engine)
- Two camera ports (one full sized, and one medium sized)