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Hyperspectral remote sensing - Sensors. Contact: [email protected] Mirza Muhammad Waqar. Contents. Hyperspectral Instruments AVIRIS (Airborne Visible Infrared Imaging Spectrometer) CASI‐2 (Compact Airborne Spectrographic Imager‐2) Hyperion HyMap CASI.

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contents
Contents
  • Hyperspectral Instruments
    • AVIRIS (Airborne Visible Infrared Imaging Spectrometer)
    • CASI‐2 (Compact Airborne Spectrographic Imager‐2)
    • Hyperion
    • HyMap
    • CASI
hyperspectral instruments
Hyperspectral Instruments
  • AVIRIS (Airborne Visible Infrared Imaging Spectrometer)
  • MODIS (Moderate Resolution Imaging Spectroradiometer)
  • CASI‐2 (Compact Airborne Spectrographic Imager‐2)
  • Hyperion
  • Daedelus Instruments
  • HyMap
  • CASI
aviris airborne visible infrared imaging spectrometer
AVIRIS (Airborne Visible Infrared Imaging Spectrometer)
  • The Airborne Visible InfraRed Imaging Spectrometer (AVIRIS) was designed and built by the NASA Jet Propulsion Laboratory (JPL).
  • It is a whiskbroom scanner, and it flies on several airborne platforms. 
  • The swath and spatial resolution depend on the flying height and over-ground speed of the aircraft.
slide6
Cont…
  • On the NASA ER-2 jet at 20 km above MSL, AVIRIS covers an 11 km swath at 20 m GSD.
  • On a DeHaviland Twin Otter turboprop at 4 km AGL, AVIRIS covers a 2 km swath at 4 m GSD.
  • 224 contiguous spectral channels
  • Radiometric resolution: 12 bit
slide7
Note
  • AVIRIS is flown primarily for NASA-funded scientists and researchers. Graduate students can obtain small amounts of existing AVIRIS data at no cost.
  • http://aviris.jpl.nasa.gov/data/grad_research.html
casi 2 compact airborne spectrographic imager 2
CASI-2 (Compact Airborne Spectrographic Imager-2)
  • The Compact Airborne Imaging Spectrometer (CASI) is built by ITRES Research Ltd., of Canada
  •  It can collect data in 14-bit format for 288 bands at 2.5 nm nomi
  • However, the overall spectral range is limited to 650 nm, which is adjustable anywhere between 400 nm (blue) and 1050 nm (near-IR).nal intervals.
  • GSD in the range of 25 cm - 1.5 m
hyperion
Hyperion
  • The Hyperion hyperspectral imaging sensor flies on the NASA Earth Observing-1 (EO-1) spacecraft launched in late 2000.
  • Pushbroom technology gives Hyperion a longer target look time than a scanning radiometer, which helps to overcome the signal-to-noise problem.
hymap
HyMap
  • HyVista Corporation, of Sydney, Australia, commercially operates a 128-band whiskbroom hyperspectral scanner.
  •  It operates in the familiar spectral range of 400 - 2500 nm
    • but with a bandwidth of 15-20 nm rather than 10 as for AVIRIS and Hyperion
  •  It records data in 12 - 16 bit format. 
  • Spatial resolution range 3-10 m.
applications of hyperspectral data
Applications of Hyperspectral Data
  • Atmosphere: water vapor, cloud properties, aerosols
  • Ecology: chlorophyll, leaf water, cellulose, pigments
  • Geology: mineral and soil types
  • Coastal waters: chlorophyll, phytoplankton, dissolved
  • Organic materials, suspended sediments, bathymetry
  • Snow/ice: snow cover fraction, grain size, melting
  • Biomass burning: subpixel temperatures, smoke
  • Commercial: mineral exploration, agriculture and forest production
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