FieldSpec 4 Hi-Res: High Resolution Spectroradiometer

High resolution spectral data from a ruggedized field-portable spectroradiometer

The FieldSpec® 4 Hi-Res is a high resolution spectroradiometer designed for faster, more precise spectral data measurements for a wide array of remote sensing applications.

The 3 nm VNIR, 8 nm SWIR spectral resolution of the FieldSpec 4 Hi-Res spectroradiometer provides superior spectral performance across the full range solar irradiance spectrum (350 – 2500 nm). The enhanced spectral resolution in the SWIR range (1000 – 2500 nm) is particularly useful for detecting and identifying compounds with narrow spectral features in the longer wavelengths such as alteration mineralogy and gases for atmospheric analysis.

Additionally the 8 nm resolution meets or exceeds the spectral resolution of most hyperspectral sensors making the FieldSpec 4 Hi-Res spectroradiometer an excellent choice for sensor validation and calibration, as well as ground truthing and building spectral libraries.

Like all ASD FieldSpec spectroradiometers, the FieldSpec 4 Hi-Res can be used as a high resolution spectrometer for very accurate contact reflectance measurements.

Spectral Range 350-2500 nm
Spectral Resolution 3 nm @ 700 nm
8 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  1.4 X10-9  W/cm2/nm/sr @ 1400 nm
SWIR 2  2.2 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

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