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Pushbroom radiometry and its potential using large space antennasElectromagnetic radiation is emitted by matter which was heated to a temperature above absolute zero. The amount of blackbody radiation in the microwave frequency region of interest (10 to the 8th power f 10 to the 10th power Hz) emitted by matter can be determined from the Rayleigh-Jeans approximation to Planck's Radiation Law. The amount of electromagnetic radiation from matter which is not a blackbody is a function of the emissivity of the material. The emissivity is a factor less than unity and is a function of several parameters including chemical composition, temperature, frequency, surface characteristics, and viewing angle. A radiometer is an instrument which detects and provides a measure of the electromagnetic radiation being emitted by a material or surface area within the radiometer's antenna beamwidth. Microwave radiometers provide the capability for remote measurements from Earth orbits of geophysical parameters. These measurements will require the use of a microwave imaging radiometer using a large aperture deployable antenna with multiple beams in a pushbroom mode to achieve high spatial resolution and large swath width.
Document ID
19830018589
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Harrington, R. F.
(NASA Langley Research Center Hampton, VA, United States)
Keafer, L. S., Jr.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 11, 2013
Publication Date
May 1, 1983
Publication Information
Publication: Large Space Antenna Systems Technol., Pt. 1
Subject Category
Launch Vehicles And Space Vehicles
Accession Number
83N26860
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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