The ASD 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 ASD 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) |
| Calibrations | Wavelength, absolute reflectance, radiance*, irradiance*. All calibrations are NIST traceable. (*radiometric calibrations are optional) |
| Computer | Windows® 7 64-bit laptop (instrument controller) |
| Warranty | One year full warranty including expert customer support |