NASA Logo, External Link
Facebook icon, External Link to NASA STI page on Facebook Twitter icon, External Link to NASA STI on Twitter YouTube icon, External Link to NASA STI Channel on YouTube RSS icon, External Link to New NASA STI RSS Feed AddThis share icon
 

Record Details

Record 2 of 3500
Airborne and spaceborne radar images for geologic and environmental mapping in the Amazon rain forest, Brazil
Author and Affiliation:
Ford, John P.(Jet Propulsion Lab., California Inst. of Tech., Pasadena., United States)
Hurtak, James J.(Technological Marketing Analysis Corp., San Francisco, Calif., United States)
Abstract: Spaceborne and airborne radar image of portions of the Middle and Upper Amazon basin in the state of Amazonas and the Territory of Roraima are compared for purposes of geological and environmental mapping. The contrasted illumination geometries and imaging parameters are related to terrain slope and surface roughness characteristics for corresponding areas that were covered by each of the radar imaging systems. Landforms range from deeply dissected mountain and plateau with relief up to 500 m in Roraima, revealing ancient layered rocks through folded residual mountains to deeply beveled pediplain in Amazonas. Geomorphic features provide distinct textural signatures that are characteristic of different rock associations. The principle drainages in the areas covered are the Rio Negro, Rio Branco, and the Rio Japura. Shadowing effects and low radar sensitivity to subtle linear fractures that are aligned parallel or nearly parallel to the direction of radar illumination illustrate the need to obtain multiple coverage with viewing directions about 90 degrees. Perception of standing water and alluvial forest in floodplains varies with incident angle and with season. Multitemporal data sets acquired over periods of years provide an ideal method of monitoring environmental changes.
Publication Date: Jan 01, 1986
Document ID:
19880014637
(Acquired Nov 04, 1995)
Accession Number: 88N24021
Subject Category: EARTH RESOURCES AND REMOTE SENSING
Coverage: Abstract Only
Document Type: Conference Paper
Publication Information: INPE, Latin American Symposium on Remote Sensing. 4th Brazilian Remote Sensing Symposium and 6th SELPER Plenary Meeting, Volume 1,; p 129
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: Jet Propulsion Lab., California Inst. of Tech.; Pasadena, CA, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: AIRBORNE EQUIPMENT; FORESTS; GEOMORPHOLOGY; MAPPING; RADAR IMAGERY; RAIN; SPACEBORNE EXPERIMENTS; AIRBORNE RADAR; AMAZON REGION (SOUTH AMERICA); ANNUAL VARIATIONS; EARTH RESOURCES; MOISTURE CONTENT
Imprint And Other Notes: In INPE, Latin American Symposium on Remote Sensing. 4th Brazilian Remote Sensing Symposium and 6th SELPER Plenary Meeting, Volume 1, p 129 (SEE N88-24013 17-43)
Availability Source: Other Sources
› Back to Top
Find Similar Records
NASA Logo, External Link
NASA Official: Gerald Steeman
Site Curator: STI Program
Last Modified: August 27, 2013
Contact Us