ASD FieldSpec 4 Hi-Res NG Spectroradiometer
6 nm enhanced SWIR resolution for the next generation of hyperspectral sensors
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.
OverviewThe 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.
Camouflage Characterization and Detection
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 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.
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.
Laboratory-quality in situ field measurements with equivalent illumination and viewing geometry for accurate correlation to satellite and aircraft sensor data.
Remote Sensing and Geology
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.
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.
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.
Airborne Remote Sensing Measurements
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 (NIR) spectroscopy is the ideal measurement tool.
|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|
|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
|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
ASD FieldSpec 4 Hi-Res NG Spectroradiometer
Probes and Lighting
The ASD Contact Probe is designed for contact measurements of solid raw materials such as minerals, grains, other granular materials. Its innovative optical design minimizes measurement errors associated with stray light and allows for measurement of samples through clear and transparent plastic bags.
In addition to the standard contact probe, ASD also offer the Hi-Brite contact probe and the Plant Probe.
All contact probes are available with a ruggedized cable feed and cable, designed for applications that involve extra cold or harsh temperatures. (see image below specifications)
|Length||10" ( 25.4 cm)|
|Weight||1.5 lbs (.7 kg)|
|Power requirements||12-18 VDC, 6.5 W|
|Lightsource type/Life (approx.)||Halogen bulb/1500 hours|
|Halogen bulb color temperature||2900 K|
|Spot size||10 mm|
The same design, features, and benefits of ASD's standard contact probe, but with a higher intensity illumination setting on the sample window. This higher intensity illumination is ideal for inorganic applications, and is recommended for mineral and ore characterization in mining exploration and research applications using the TerraSpec, FieldSpec 4 Hi-Res and LabSpec Hi-Res spectrometers.
The same design, features, and benefits of ASD's standard Muglight, but with a higher intensity illumination setting on the sample window. This higher intensity illumination is ideal for inorganic applications, and is recommended for use with the TerraSpec, FieldSpec 4 Hi-Res, and LabSpec 4 Hi-Res spectrometer models.
The Hi-Brite Muglight is designed for analysis of raw materials requiring reflectance and absorbance measurements. It can measure samples through glass vials, or using the ASD sampling tray adapter. It's unique and innovative design minimizes measurement errors associated with stray light and specular reflected components.
The ASD Muglight is designed for analysis of raw materials requiring reflectance and absorbance measurements. It can measure samples through glass vials, or using the ASD sampling tray adapter. It's unique and innovative design minimizes measurement errors associated with stray light and specular reflected components.
For users requiring higher intensity illumination, ASD also offers the Hi-Brite Muglight.
|Size||5.5” x 3.7” (14cm x 9.4cm)|
|Weight||2.91 lbs (1.3 kg)|
|Power requirements||Input power 5.5 W, bulb 4 W|
|Light source (type/life) approx.||Tungsten Quartz Halogen b/1500rs|
|Bulb color temp||2900 K|
|Spot size||12 mm|
The same great design and functionality as ASD's standard contact probe
with a lower intensity bulb position for non-destructive data collection from live vegetation and other heat sensitive targets.
ASD's Leaf Clip assembly is designed specifically for use with the Plant Probe to simplify the process of collecting spectra on live vegetation. The unique design includes a gentle trigger lock/release gripping system for holding the target sample in place without removing the leaf from its habitat, or inflicting damage.
Integrating spheres collect reflected light from samples over a full hemisphere. The sphere, by nature of its internal diffuse (lambertian) reflection and integration of the energy, is insensitive to directional reflectance features coming from the sample, and therefore, gives a very repeatable “averaged” response to the reflectance of the sample placed in the beam at the sphere port. Sample placement and incidence beam/collection alignment are less critical to the measurement results because the integrating sphere looks at representative averaged energy from all angles at the same time.
ASD offers multiple pistol grip options for superior ease-of-use and adaptability to a variety of environmental and situational elements, when using your FieldSpec® and FieldSpec HandHeld instruments. All pistol grip designs include the quick-connect/disconnect fiber optic cable snap-in feature, pistol grip clip assembly for safely and securely affixing the pistol grip to your waist-belt on the back pack, and many offer a built-in bulls-eye level for added precision.
ASD carries a wide array of calibrated and non-calibrated diffuse white and gray reference panels in varying sizes (from 2 x 2 in. to 12 x 12 in. or 5.1 x 5.1 cm to 30.5 cm x 30.5 cm) and reflectance levels, including encapsulated gray scale (NIST/NRC traceable) wavelength and USP standards for USP 1119. Calibrated panels come with certificate and documentation showing standard deviation and reflectance factors.
All reference panels and standards may be purchased separately. To provide our customers with a more cost-effective approach, specific sizes or styles of reference panels are included in accessory bundles designed for maximum compatibility with a particular application.
Your ASD sales representative will be able to advise you on the best option(s) for your needs.
Stop waiting for “ideal” weather to get your fieldwork done
The FieldSpec Dual collection software system leverages the value and utility of the world’s most trusted line of portable field spectrometers. The software intercalibrates and wirelessly synchronizes two ASD FieldSpec spectroradiometers to collect near simultaneous white reference and sample target radiance spectra. The system virtually eliminates errors associated with time varying atmospheric conditions, one of the biggest challenges to collecting accurate field spectra.