|NOTE: This data
set has been
superseded by Revision 1 on 2015-07-18. The ISO images and CD-ROMS associated with this data
set are no longer being distributed. In the revised data set, the images
have been converted to GeoTIFF format (.tif) and renamed. Additional
graphical images are provided as .gif companion files.
Follow this link to the latest version:
Chapman, B., A. Rosenqvist, and A. Wong. 2015. JERS-1 Synthetic Aperture Radar, 100-m Mosaics, South America: 1995-1996, R1. Data set. Available on-line [http://daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, USA. http://dx.doi.org/10.3334/ORNLDAAC/1280.
This data set contains four ISO images of a four volume CD-ROM set from the Japanese Earth Resources Satellite 1 (JERS-1) Synthetic Apeture Radar (SAR) of the National Space Development Agency of Japan (NASDA), radar images of South America. This CD-ROM distribution was based on previous CD-ROMs produced for the Global Rain Forest Mapping (GRFM) project. The GRFM initiative was lead by the NASDA Earth Observation Research Center (EORC), with participation by Alaska Satellite Facility (ASF) , the Jet Propulstion Laboratory (JPL), the European Commissions Joint Research Centre, and others. The data have been "mosaicked" into tiles, each consisting of about 50 JERS-1 scenes. the data were acquired between September and December 1995 (low flood season for the river) and between May and July of 1996. This data set consitutdes the first-ever high resolution and single season coverage of the entire Amazon river basin and is made possible by the cloud penetrating properties of the radar sensor.
In addition, gif imagery of topography and slope from the GTOPO30 Global 30 Arc Second Elevation data set are also included.
The original CD-ROM contained four volumes, each distributed as a single ISO image. Once extrapolated, each CD-ROM's ISO image has contains complete documentation for each of the mosaic tiles. Additionally the CD-ROM contents are available online at http://southport.jpl.nasa.gov/GRFM.
Cite this data set as follows:
Chapman, B., A. Rosenqvist, and A. Wong. 2001. JERS-1 SAR Global Rain Forest Mapping Project: Vol. AM-1, South America. Data set. Available on-line [http://www.daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. doi:10.3334/ORNLDAAC/582.
The original CD-ROM distribution of this data set was written, designed and produced by Bruce Chapman, Jet Propulsion Laboratory; Ake Rosenqvist, National Space Development Agency of Japan (NASDA); and Al Wong, Jet Propulsion Laboratory; and is based upon previous cdroms produced for the GRFM project. We thank the many people involved in the data processing, in particular: Greg McGarragh, Paul Siqueira, John Holt, Marcos Alves, Masanobu Shimada, Dave Curkendall, and Laura Hess. A portion of this work was carried out by the Jet Propulsion Laboratory (JPL), California Institute of Technology, under a contract with the National Aeronautics and Space Administration (NASA).
The four data files within this data set are ISO images of the original JERS-1 SAR Global Rain Forest Mapping Project, South American (Amazon Basin), dual season SAR image mosaics, four volume CD-ROM distribution. Each ISO image represents one CD-ROM volume, GRFM AM-1A, GRFM AM-1B, GRFM AM-1C, or GRFM AM-1D. The data files within each ISO image are provided in two data formats: 15 arc-second (445-465 meter) pixel spaced GIF images and 3 arc-second (89-93 meter) pixel spaced raw 8 bit images. The pixel spacing in meters of each mosaic tile depends on the Latitude of the image. SAR images are gray gray scale and the brightness of the image corresponds to the amount of energy reflected back to the radar.
A tutorial on SAR imagery as well as a complete description of the data contents/formats are provided.