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 @ 2/3 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