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Record Details

Record 2 of 5802
Remote sensing of soil moisture
Author and Affiliation:
Schmugge, T.(NASA Goddard Space Flight Center, Greenbelt, Md., United States)
Abstract: The surface emissivity and reflectivity of soil are strong functions of its moisture content. Changes in emissivity, observed by passive microwave techniques (radiometry), and changes in reflectivity, observed by active microwave techniques (radar), can provide information on the moisture content of the 0 to 5 cm surface layer. In addition, the thermal inertia of the surface layer, which can be remotely sensed by observing the diurnal range of surface temperature, is an indicator of soil moisture content. The thermal infrared approach to remote sensing of soil moisture has little utility in the presence of cloud cover, but provides soil moisture data at high spatial resolutions and thermal data which are a potentially useful indicator of crop status. Microwave techniques can penetrate cloud covers. The passive technique has been demonstrated by both aircraft and spacecraft instruments, but spatial resolution is limited by the size of the antenna which can be flown. Active microwave systems offer the possibility of better spatial resolution, but have yet to be demonstrated from aircraft or spacecraft platforms.
Publication Date: Jun 01, 1976
Document ID:
19760053502
(Acquired Dec 01, 1995)
Accession Number: 76A36468
Subject Category: EARTH RESOURCES AND REMOTE SENSING
Document Type: Conference Paper
Publisher Information: International Organization
Meeting Information: COSPAR, Plenary Meeting; 19th; June 8-19, 1976; Philadelphia, PA
Meeting Sponsor: COSPAR
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 26p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: MICROWAVE RADIOMETERS; RADAR ECHOES; REMOTE SENSORS; SOIL MOISTURE; SURFACE TEMPERATURE; THERMAL RADIATION; BRIGHTNESS TEMPERATURE; DIELECTRIC PROPERTIES; EMISSIVITY; GRAPHS (CHARTS); INFRARED RADIATION; MICROWAVE SENSORS; PERMITTIVITY
Imprint And Other Notes: COSPAR, Plenary Meeting, 19th, Philadelphia, Pa., June 8-19, 1976, Paper. 26 p.
Availability Source: Other Sources
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