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Projects > G - I > GRSFE

Preferred term

GRSFE  

Definition

  • This set of compact read-only optical disks (CD-ROMs) contains a data collection acquired by ground-based and airborne instruments during the Geologic Remote Sensing Field Experiment (GRSFE). Extensive documentation is also included. GRSFE took place in July, September, and October, 1989, in the southern Mojave Desert, Death Valley, and the Lunar Crater Volcanic Field, Nevada. The purpose of these CD-ROMs is to make available in a compact form through the Planetary Data System (PDS) a collection of relevant data to conduct analyses in preparation for the Earth Observing System (EOS), Mars Observer (MO), and other missions. The generation of this set of CD-ROMs was sponsored by the NASA Planetary Geology and Geophysics Program, the Planetary Data System (PDS) and the Pilot Land Data System (PLDS). This AAREADME.TXT file is one of the two nondirectory files located in the top level directory of each CD-ROM volume in this collection. The other file, VOLDESC.SFD, contains an overview of the data sets on these CD-ROMs and is written in a format that is designed for access by computers. These two files appear on every volume in the collection. All other files on the CD-ROMs are located in directories below the top level directory. On Volume 1, the directory DOCUMENT contains a text file named VOLINFO.TXT that describes the CD-ROM organization, the format and content of each of the data sets, and background information and references needed to understand the implementation of GRSFE and the preparation of the data sets on the CD-ROMs. It is recommended that you read the VOLINFO.TXT document before using the data files. The DOCUMENT directory also includes text files that describe the format of some of the data files. These text files are referenced in the detached labels that accompany the data files. The directory INDEX, also on Volume 1, contains a number of index files. These files are tables in text form that have descriptive information about some of the data sets on this CD-ROM. While the indexes can be visually scanned, they have been designed so that they can also be loaded into most database systems for fast and efficient searching. Separate directories exist for each instrument that acquired data for GRSFE. Each of these directories contains data set files and associated detached labels. Some instrument directories are further subdivided to manage a large number of files or to logically group a collection of files. The ground-based data sets, documentation, index tables and software are all located on Volume 1, and the airborne data sets are spread over Volumes 1 through 9. The VOLINFO.TXT document mentioned above contains a list of files and directories on each volume. On Volume 2, the SAMPLER directory contains a set of image files and associated detached labels that illustrate the utility of comparison of data from multiple sensors over the same sites. The images are sub- scenes taken from AIRSAR, ASAS and TIMS images that appear elsewhere in this CD-ROM collection. They are calibrated and registered to the AVIRIS scene AVRLV02A.IMG, in the AVIRIS directory on the same volume. (en)

Broader concept

URI

https://gcmd.earthdata.nasa.gov/kms/concept/7143c321-5d29-4659-9c38-12caf4f92a77

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