Analytical Spectral Devices, Inc. (ASD) FieldSpec3 Spectroradiometer

Enhancing MTRI’s remote sensing field capabilities is the FieldSpec3 Spectroradiometer. This instrument accurately measures reflectance, transmittance, radiance, or irradiance in the full spectrum range of 350-2500 nm. It was specifically designed for field environment remote sensing to acquire visible near-infrared (VNIR) and short-wave infrared (SWIR) spectra. Capabilities include both terrestrial and aquatic spectral data collection using three detectors and multiple foreoptic attachments, including one designed specifically for the laboratory environment. In aquatic collections, researchers at MTRI utilize a custom-built gimbal and rod which allows for deployment from boats, bridges, etc.

Zach Raymer and Mike Sayers

MTRI scientists Zach Raymer (left) and Mike Sayers (right) are using the ASD Spectroradiometer, taking spectral measurements of algal blooms in Lake Erie.

Wavelength Configuration

Spectral Resolution

Sampling Interval

MTRI has applied the spectroradiometer to a variety of research projects, including ones for turbidity and trophic state mapping, land cover analysis, the influence of bidirectional reflectance, road surface profiling, crop residue calculations, algal bloom assessment, and forest fire burned area assessment. We maintain a computing infrastructure to analyze the spectral data, including ENVI and ERDAS Imagine software.

Land cover map created with the help of in situ spectral data collects.

For Additional Information

Colin Brooks
Senior Research Scientist

Mike Sayers
Research Engineer

Collection of road surface and wetland spectral data are depicted above.

Road surface profiles used to map road types and surface quality.
Shaded bands reflect spectral bands of typical high resolution satellite imagery.

Irradiance measurements taken using aquatic equipment, showing differences in upwelling and downwelling data.

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