Field Scanner

This section describes the sensors deployed on the Lemnatec Field Scanner in Maricopa, AZ. Device and sensor information, including technical specifications, calibration data, and calibration targets are stored in the TERRA REF Clowder database.

The Maricopa field site is located at the the University of Arizona Maricopa Agricultural Center and USDA Arid Land Research Station in Maricopa, Arizona. At this site, we have deployed the following phenotyping platforms.

The Lemnatec Scanalyzer Field System is the largest field crop analytics robot in the world. This high-throughput phenotyping field-scanning robot has a 30-ton steel gantry that autonomously moves along two 200-meter steel rails while continuously imaging the crops growing below it with a diverse array of cameras and sensors.

Twelve sensors are attached to the gantry system. Detailed information for each sensor including name, variable measured, and field of view are described in the table below, with links to more detailed specifications.

Sensor Name	Model and Spec Sheet	Field of View	Pixel dimension (mm) at 2m	Technical Specifications	Notes
Imaging Sensors
Stereo RGB Camera	GT3300 (web) (specs)	53°	0.305 x 0.315
Laser Scanner	Custom Frauhofer 3D (specs)	0.5m width	1.0 x 0.4	Laser Power: 2000 mW Laser class: 3B
VNIR Hyperspectral Imager	Inspector VNIR (specs)	21°	0.6	380-1000 nm @ 2/3 nm resolution
SWIR Hyperspectral Imager	Inspector SWIR (specs)	44.5°	1.4 x 1.0	900-2500 nm @ 12 nm resolution
Thermal Infrared	FLIR SC 615 (web) (specs)	25° x 19°	2.3	Thermal sensitivity: <50mK @ +30°C Range: -40°C to +150°C
PSII Fluorescence Response	Lemnatec PS II (specs)	25° x 19°	1.38 x 1.35	Illumination 4000umol/m2/s Wavelength: 635nm
Multi-spectral Radiometers
Dedicated NDVI	Skye Multispectral Radiometer (web) (specs)			CH1: 650nm; CH2 800. Bandwidth: 10 nm	1 down, 1 up
Dedicated PRI Sensor	Skye Radiometer (web) (specs)			CH1: 531nm +/- 3nm	PRI = Photochemical Reflectance Index
PAR Sensor	Quantum SQ-300	180°		Spectral Range 410 to 655 nm
VNIR Spectroradioometer	Ocean Optics STS-Vis			Range: 337-824 nm @ 1/2 nm
VNIR+SWIR Spectrometer	Spectral Evolution PSR+			Range 350-2500nm @3-8 nm	Installed 2018
Active Reflectance	Crop Circle ACS430P			Bands: 670, 730, 780 nm
Environmental Sensors
Environmental Sensors	Thies ClimaSensorD (web) (specs)			Wind Speed Wind Direction Air Temperature Relative Humidity Air Pressure Light Precipitation	Wind: 0 - 60m/s Wind direction: 0 – 360° Air temperature: -30°C – 70°C Relative Humidity: 0 – 100% Air pressure: 300 – 1100hPa Lightness: 0 – 150kLux
Open Path CO2 Sensor	GMP 343			CO2 Concentration Range: 0-1000 ppm