Spectrometer ASD FieldSpec 4 Hi-Res NG (NIR)

Higher resolution hyperspectral sensors yield greater precision for remote sensing classification applications, producing more information from every pixel generated in an image than ever before. To help maximize the full potential of these next generation sensors, measurements from ground based instrumentation need to meet or exceed the sensor’s spectral resolution. In the absence of this resolution equality, data is interpolated during post processing and vital spectral information can be smoothed and lost.

The enhanced spectral resolution of the ASD FieldSpec 4 Hi-Res NG spectroradiometer has been designed to meet the rigorous demands of the next generation hyperspectral imaging systems such as AVRIS-NG and HySpex ODIN-1024. In addition to superior spectral resolution, the ASD FieldSpec 4 Hi-Res NG (like all ASD range spectroradiometers), incorporates graded index InGaAs photodiode SWIR detectors to provide the smallest available spectral sampling interval in a field portable device with 1,875 measured wavelengths over the full 350 to 2500 nm spectral range, ensuring detection of even the most subtle spectral features.

The ASD FieldSpec 4 Hi-Res NG spectrometer can be used in many industry applications, including:

ASD systems are used to determine plant physiological status, including disease status, nutritional status related to nitrogen uptake and moisture balance.

The detection of camouflaged or hidden objects requires a measurement that provides a contrast between the object and background materials.

An accurate radiance calibration of an imaging sensor is critical to many remote sensing applications.

Supervised classification can be performed using either image-derived or field-measured spectral signatures.

Spectroradiometry, the measurement of absolute optical radiation at each wavelength, is applicable to a variety of settings, including measuring the spectral energy output of a lamp, LED display, or other light source to determination of the flux of sunlight reaching a forest floor or other scene.

Collection of visible, near infrared, and short-wave infrared images for the detection, identification, and quantification of surface materials, biological, and chemical processes for research and analysis in numerous environmental and military applications.

Laboratory-quality in situ field measurements with equivalent illumination and viewing geometry for accurate correlation to satellite and aircraft sensor data.

ASD’s spectroradiometers have been used for decades for remote geologic interpretation.

Field spectroscopy — the study of the interrelationships between the spectral characteristics of objects and their biophysical attributes in the field environment.

The ability to accurately perform reflectance and radiometric measurements of vegetation and soil in the field is critical to understanding light utilization and partitioning within a plant community.

Observations of direct, diffuse, and total spectral solar irradiance, as well as sky and cloud radiance, are essential for atmospheric research in many climate and ecosystem energy balance studies.

The collection of spectra over areas that are too large or inaccessible for ground-based measurement.

From characterization of oil content of soybeans and other crops, to quantification of key parameter levels in biofuel processing and quality analysis of final product, near-infrared spectroscopy is the ideal measurement tool.