How does the drone-borne radar work?

The radar is installed on the drone. The drone flies over the area and can cover up to 500 hectares per day. After the flight we wait for the data to be processed and we can view the results using the drone's own operating equipment. The result is a report with images and information of the surveyed area.

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Differentials

- It does not depend on sunlight and cloud cover to operate;

- Operates with a camera simultaneously;

- It has three bands (C, L and P) that provide information on the top and volume of vegetation and soil;

- Simple interface by cell phone or tablet;

- Result right after the flight, depending on the application.

Technical Specifications

- Coverage: up to 200 hectares in each 20-minute flight;

- Scales of the maps: 1: 500 to 1: 50,000;

- Resolution: 5 cm (1: 500) to 5 m (1: 50,000);

- Height accuracy: 10 cm to 1 m;

- Accuracy of the subsidence measure: 8 mm;

- Flight height: 120 m.

Multiband solution

The radar is hardware with embedded software, that is, a printed circuit board integrated to an inertial measurement unit and GNSS, which combined with 3 different types of antennas, operating in different bands, can capture relevant information from the surveyed area.

 

We use the C, L and P bands, with C obtaining information on the height of the vegetation, L information on the volume of the vegetation and P being able to penetrate the dense forest and the soil.

Drone Integration

The drone is just the means of carrying the radar to fly over the desired area. The only current restriction is that the equipment must have a payload of 5 kg, which would be the weight of the structure and the radar with the antennas.

 

We currently use the DJI Matrice 600 pro model, however other models that have a payload of 5 kg can be used. The integration of the radar in the drone is very simple, because as the radar has a consumption of only 15W and has its own GNSS antenna, the integration is only mechanical with a simple electrical interface. Optionally, the radar can communicate with the drone's on-board computer via Ethernet or UART.

Keeper

Aimed at monitoring solutions, that is, that need revisits such as crop forecasting, plantation growth, soil moisture measurement, forest inventory, deforestation detection, measurement of subsidence of the surface and of civil construction, erosion and other recurrent surveys.

Explorer

Meets demands for non-periodic mapping and research and development. Non-periodic mappings are, for example, the accurate measurement of digital surface and terrain models and the acquisition of images on the scale of 1: 500 through circular flights, becoming the reference base for revisit flights. Research and development flights are aimed at obtaining new products in the future, such as tomography to measure subsidence of the subsurface, the detection of anthills in the soil of industrial forests, the identification of pipes and galleries in the soil and 3D images of archeology. The radar also has an interface to an external real-time processor.