What is AVIRIS sensor?
AVIRIS is a proven instrument in the realm of Earth Remote Sensing. It is a unique optical sensor that delivers calibrated images of the upwelling spectral radiance in 224 contiguous spectral channels (bands) with wavelengths from 400 to 2500 nanometers.
What is AVIRIS used for?
AVIRIS uses imaging spectroscopy to detect, identify, measure, and monitor constituents and processes of the Earth’s surface and atmosphere based on measured constituent absorption and scattering signatures. Science and applications research with AVIRIS data spans a wide range of discipline across the Earth system.
How does AVIRIS work?
AVIRIS collects spectra in a whiskbroom fashion with a mirror rapidly scanning perpendicular to the direction of flight and a single spectrometer that views each spot on the ground for a very short period of time.
How many bands does NASA AVIRIS sensor have?
224 bands
Spectral range: 360 – 2500 nm with a total of 224 bands. AVIRIS is now an operational instrument with reliable radiometric and spectral calibrations. AVIRIS typically acquires images with a pixel size of 20 m from a NASA ER-2 aircraft at an altitude of 20 km. The swath width on the ground is approximately 12 km.
Is Aviris active or passive?
The operational temperature is maintained by the operation of two cyrocoolers. This change to active cooling from the passive cryogen approach used for AVIRIS allows operation for up to 14 days at a time with only minimal maintenance of the vacuum….
| Optical | |
|---|---|
| Spectral range | 380 – 2510 nm |
| Data quantization | 14 bit |
Is Aviris a hyperspectral?
The Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) represents the current state of the art airborne hyperspectral system (Porter and Enmark, 1987; Green et al., 2001).
How do I get data from AVIRIS?
Download AVIRIS data as acquired from 2006 to the present using the AVIRIS Data Products Portal. Search for and order AVIRIS flights acquired from 1992 to 2005. Please fill out the AVIRIS Archive Data Request form to order 1992 through 2005 AVIRIS data products.
What is a multispectral sensor?
Multispectral sensors are the workhorses of drone-based advanced sensing. Their ability to capture data at exceptional spatial resolution—as well as determine reflectance in the near infrared—makes them an extremely versatile and effective sensor.
How does a multispectral sensor work?
Multispectral cameras work by imaging different wavelengths of light. The output of the camera is a set of images for that particular wavelength. These sets of images are then stitched together to create geographically accurate mosaics, with multiple layers for each wavelength.
What is the spectral range of the AVIRIS sensor?
Sensor: optomechanical whiskbroom scanner (12 Hz) that uses line arrays of detectors to image a 677 pixel-wide swath in 224 contiguous bands (four grating spectrometers). Spectral range: 360 – 2500 nm with a total of 224 bands. AVIRIS is now an operational instrument with reliable radiometric and spectral calibrations.
How is AVIRIS used in Earth remote sensing?
AVIRIS is a proven instrument in the realm of Earth Remote Sensing. It is a unique optical sensor that delivers calibrated images of the upwelling spectral radiance in 224 contiguous spectral channels (bands) with wavelengths from 400 to 2500 nanometers.
When was the AVIRIS Airborne Sensor first flown?
In June/July 1991 the instrument was flown over numerous European test sites in the framework of EMAC (European Multi-Sensor Airborne Campaign). AVIRIS uses scanning optics and a group of four spectrometers to image a 677 pixel swath width simultaneously in 224 contiguous spectral bands.
What kind of aircraft is the AVIRIS used on?
It is a unique optical sensor that delivers calibrated images of the upwelling spectral radiance in 224 contiguous spectral channels (bands) with wavelengths from 400 to 2500 nanometers. AVIRIS has been flown on four aircraft platforms: NASA’s ER-2 jet, Twin Otter International’s turboprop, Scaled Composites’ Proteus, and NASA’s WB-57.