We utilize the Yara N-Sensor (passive) on our tractors to measure the spectral reflectance signature of the plant canopy. It is equipped with VIS-NIR spectrometers (400-900 nm) to simultaneously detect the incident down-welling radiation and the upwelling canopy reflection at a nadir angle of 60°.
Yara N-Sensor hand held
As the tractor-mounted N-Sensor, we utilize the same measurement principle with two Tec5 MMS1 spectrometer in a hand held version for small plots in experimental field trials.
For measuring radiation in an extended spectral range (350-2500 nm) and at higher spectral resolution (1 nm), we make use of the ASD FieldSpec 3 spectroradiometer.
Ocean Optics spectrometer
We have several Ocean Optics point spectrometers, which are sensitive to UV-VIS-NIR radiation (200-1100 nm). Our customized USB 4000 with a very high spectral resolution (0.1 nm) is used for research applications that require the detection of slight reflection differences and fluorescence emissions. Our USB 2000 and the FLAME-series spectrometers are used as field spectrometers or to detect incident radiation on the prototype hybrid UAV.
Rikola hyperspectral camera
We use the Rikola Hyperspectral Camera for many remote sensing applications in the greenhouse, the field or on-board our UAVs. The camera is light-weight and sensible to radiation in the VIS-NIR range (450-800 nm), whereas the bands can be selected individually. In USB-mode we sample up to 200 different bands while the number of bands is reduced to a maximum of 32 in flight-mode.
Imec and Ximea hyperspectral camera
In addition to the Rikola Hyperspectral Camera, we use small and light-weight industrial hyperspectral snapshot cameras of the Imec and Ximea XiQ product line. Currently, we are working with the SSM2x2-RGB-NIR-10.2, the MQ022HG-IM-SM4X4-NIR, and the MQ022HG-IM-SM5X5-NIR cameras. The cameras provide information from 4 to 25 bands in the 400-950 nm range at a sampling rate of up to 170 frames/s.
Flir Tau thermal camera
For thermal imaging in the TIR range (7.5-13.5 μm) we use the Flir Tau Uncooled Microbolometer. The camera is mainly used as a hand held device or on-board our UAVs.
We use the Trimble Geo7x global navigation satellite receiver (GNSS) for high-precise real-time kinematic (RTK) measurements (1-3 cm CEP). The Trimble Geo7X can be used as a hand held device or for permanent tracking on-board our tractors and UGVs.
Swift Navigation Piksi
For high precision navigation on-board our UGVs, we use the Piksi GNSS together with our own base receiver station. For the prototype hybrid UAV, we will use the latest version Piksi Multi with multi-band support for more accurate centimeter-accuracy.