Advanced Solid-State Array Spectroradiometer (ASAS) Data Collection - The Advanced Solid-state Array Spectroradiometer (ASAS) data
collection contains data collected by the ASAS sensor flown aboard a
variety of NASA aircraft. The ASAS sensor is a hyperspectral,
multi-angle, airborne remote sensing instrument maintained and operated
by the NASA Goddard Space
Flight Center in Greenbelt, Maryland. The ASAS instrument is mounted on
the underside of either NASA C-130 or NASA P-3 aircraft and is capable
of off-nadir pointing from approximately 70 degrees forward to 55
degrees aft along the direction of flight.
A fundamental use of ASAS data is to characterize and understand the
directional variability in solar energy scattered by various land surface
cover types (e.g., crops, forests, prairie grass, snow, bare soil). The
sensor's Bidirectional Reflectance Distribution Function determines the
variation in the reflectance of a surface as a function of both the view zenith
angle and solar illumination angle.
[keywords: Advanced Solid-state Array Spectroradiometer, ASAS, airborne, remote sensing](Added: 6-Jun-1999 Hits: 918)
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MODIS (Moderate Resolution Imaging Spectrometer) - MODIS (or Moderate Resolution Imaging Spectrometer) is the key instrument aboard the Terra
(EOS AM-1) satellite. The MODIS Instrument will view the entire Earth's surface every 1 to 2
days, acquiring data in 36 spectral bands. These data will
improve our understanding of global dynamics and processes occurring on the surface of the
Earth, in the oceans, and in the lower atmosphere. MODIS will play a vital role in the
development of validated, global, interactive Earth system models able to predict global change
accurately enough to assist policy makers in making sound decisions concerning the protection of
our environment.
[keywords: MODIS](Added: 6-Jun-1999 Hits: 955)
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