FieldSpec 4 Standard-Res Spectroradiometer

The go-to standard for trusted portable field spectroscopy

The 3 nm VNIR, 10 nm SWIR spectral resolution of the FieldSpec® 4 Standard-Res portable spectroradiometer is ideal for characterizing spectral features with a resolution down to 10 nm. The FieldSpec 4 Standard-Res is well positioned to meet a majority of the technical needs of field researchers who require dependable and trusted results from a field portable spectroradiometer.

The FieldSpec 4 Standard-Res portable spectroradiometer is the right choice for a wide range of remote sensing applications, including multispectral sensor ground truthing and calibration, agricultural analysis, and snow and ice studies. In addition to being a world class spectroradiometer, the FieldSpec 4 Standard-Res is equally suited to serve as a rugged, portable spectrometer for accurate contact reflectance or non-solar stand-off measurements.

Spectral Range 350-2500 nm
Spectral Resolution 3 nm @ 700 nm
10 nm @ 1400/2100 nm 
Spectral sampling (bandwidth) 1.4 nm @ 350-1000 nm
1.1 nm @ 1001-2500 nm
Scanning Time 100 milliseconds
Stray light specification VNIR 0.02%, SWIR 1 & 2 0.01%
Wavelength reproducibility 0.1 nm
Wavelength accuracy 0.5 nm
Maximum radiance VNIR 2X Solar, SWIR 10X Solar
Channels 2151
Detectors VNIR detector (350-1000 nm): 512 element silicon array
SWIR 1 detector (1001-1800 nm): Graded Index InGaAs Photodiode, Two Stage TE Cooled
SWIR 2 detector (1801-2500 nm): Graded Index InGaAs Photodiode, Two Stage TE Cooled
Input 1.5 m fiber optic (25° field of view). Optional narrower field of view fiber optics available.
Noise Equivalent Radiance (NEdL) VNIR      1.0 X10-9 W/cm2/nm/sr @ 700 nm
SWIR 1  1.2 X10-9  W/cm2/nm/sr @ 1400 nm
SWIR 2  1.9 X10-9  W/cm2/nm/sr @ 2100 nm
Weight 5.44 kg (12 lbs)

Wavelength, absolute reflectance, radiance*, irradiance*. All calibrations are NIST traceable. (*radiometric calibrations are optional)


Windows® 7 64-bit laptop (instrument controller)


One year full warranty including expert customer support

Plant Physiology

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

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Detection of Disturbed Surfaces

Hyperspectral sensing's ability to detect ground disturbances aids in the detection of buried land mines and IEDs.

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Camouflage Characterization and Detection

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

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Near Shore Operations

The planning of amphibious operations requires knowledge of the bearing strength and trafficability of the landing area as well as the bathymetry in the vicinity of the landing zone.

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Sensor Calibration

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

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Supervised Classification

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

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Optics and Photonics

Use ASD's rapid, precise spectroradiometers for your optics and photonics applications.

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Spectroradiometry and Radiometric Calibration

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.

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Ice Characteristics Research and Snow Research

The study of snow and ice characteristics to better understanding the Earth-atmosphere radiation balance and correlations between snow reflectance and grain shape and size, hardness index, density, liquid water content, and snow temperature.

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Water Remote Sensing

Above water reflected radiance to infer water leaving radiance without the need for in-water measurement for interpretation and field validation of satellite imagery and more

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Spectral Remote Sensing

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.

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Ground Truthing

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

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Remote Sensing and Geology

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

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Field Spectroscopy

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

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Landscape Ecology and Ecology Research

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.

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Climate Effects

Global change occurs on a daily basis and data collected through remote sensing can be used effectively in climate change studies.

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Atmospheric Remote Sensing Research

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.

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Airborne Remote Sensing Measurements

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

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Optical Radiation Measurement

Optical radiation measurements, commonly referred to as photonics, is the technology of generating and harnessing light, and other forms of radiant energy, particularly in the visible and near infrared light spectrum.

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Light Energy Measurement

The field measurement of light energy constitutes an essential step in some of the world’s most advanced research applications.

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Crops and Soils Research for Soil Nutrients Analysis

Crops and Soils Research for Soil Nutrients Analysis Read more

Biomass Analysis

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 (NIR) spectroscopy is the ideal measurement tool.

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Remote sensing reference measurements

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