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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.
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The enhanced spectral resolution of the 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 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 2,500 nm spectral range, ensuring detection of even the most subtle spectral features.
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| Spectral Range | 350-2500 nm |
| Spectral Resolution | 3 nm @ 700 nm
6 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 8.0 X10-9 W/cm2/nm/sr @ 1400 nm
SWIR 2 8.0 X10-9 W/cm2/nm/sr @ 2100 nm
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| 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 |