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The GOES-8 Data Sets

Readme for the GOES-8 Subsets 

Access to
GOES-8 GIS_ARCINFO and ASCII Data Sets by Regions

List of Contents

Summary

Sponsor

Data Set Description

Data Access by Region
Alabama
Arizona
Florida
New Mexico
North Carolina
References
Points of Contact

Summary

This document provides a general description of the GOES-8 Geo_Regions subsets.The data is 1 to 2 days old and is available in both ASCII and GIS_ARCINFO formats for every 1/2 hour. Due to disk space limitations, only 3 to 4 days of data are available on line. Archived data both in ASCII and GIS_ARCINFO formats starting from 12 July 1999 are available under request.

The GOES-8 (Geostationary Operational Environmental Satellite) is located almost 36,000 km above the earth on a geostationary orbit (with a period of 24 hours), allowing continuous observation of the same region on the earth (approximately the western hemisphere). The GOES was lunched on 13 April 1994 and is positioned at 75W. The data sets available in this site are from the GOES imager 5 channels: visible channel-1 (0.52 - 0.72 microns), shortwave infrared window channel-2 (3.78 - 4.03 microns), upper level water vapor channel-3 (6.47 - 7.02 micron), longwave infrared window channel-4 (10.2 - 11.2 micron) and the infrared window more sensitive to water vapor channel 5 (11.5 - 12.5 micron. The pixel resolution is 4 km. For more information on the GOES-8, visit the CIMSS GOES Page.

Sponsor

The distribution of these data sets is funded by NASA's Earth Science Enterprise. The data are not copyrighted; however, we request that when you publish data or results using these data, please acknowledge as follows:
The authors wish to thank the Distributed Active Archive Center (Code 610.2) at the Goddard Space Flight Center, Greenbelt, MD, 20771, for producing and distributing the data. Goddard's contribution to these activities was sponsored by NASA's Earth Science Enterprise.

Data Set Description

The data time interval is 1/2 hour, however missing records exist. The data is provided both in ASCII and GIS_ARCINFO formats. On a reporting time, five ASCII data files (one for each channel) are generated for each region. Every region has associated a fixed pair of latitude and longitude files for navigation purpose. On the other hand, for every region and for every 1/2 hour, there is a set of GIS_ARCINFO files "shx", "shp", "e00" and "dbf". For more information on the GIS software ARCINFO see the Reference section.

The ASCII data set, latitude and logitude files are represented respectively by the following convention:

GOES-8.chh.4km.yyyymmddtttt.region.dat.Z
lat.region.Z
lon.region.Z

and the GIS_ARCINFO files are represented respectively by:

GOES-8.4km.yyyymmddtttt.region.ARC.dbf.Z
GOES-8.4km.yyyymmddtttt.region.ARC.e00.Z
GOES-8.4km.yyyymmddtttt.region.ARC.shp.Z
GOES-8.4km.yyyymmddtttt.region.ARC.shx.Z

GOES-8 represents the satellite. chn denotes the specific channel: vis for visible, ir2 for the 3.9 micron near infrared, ir3 for the 6.7 micron water vapor, ir4 for the 10.7 micron long infrared and ir5 for the 12.0 micron split window long infrared channels. 4km is the channel resolution. yyyy, mm and dd represent respectively the year, month and day. tttt represents the hour followed by the minutes. region is the region subset. dat and ARC represent ASCII and GIS_ARCINFO files respectively. dbf, e00 shp and shx are ARCINFO notations and Z indicates that the files are compressed. lat and lon represent the latitude and longitude ASCII files for each region.

Data Access by Region

The GOES-8 ASCII data files plus the latitude and longitude files on the /doc directory, as well as the ARC_ARCINFO data sets are accessible via anonymous FTP from disc2.nascom.nasa.gov or through this web site in the following directories:

Alabama

ASCII
GIS_ARCINFO

Arizona

ASCII
GIS_ARCINFO

Florida

ASCII
GIS_ARCINFO

New Mexico

ASCII
GIS_ARCINFO

North Carolina

ASCII
GIS_ARCINFO

References

Information about GIS_ARCINFO:
http://www.esri.com/software/arcinfo

Points of Contact

DAAC Help Desk: Data Producers:
Goddard DAAC Hydrology Data Support Team
Distributed Active Archive Center / Code 610.2
NASA Goddard Space Flight Center
Greenbelt, Maryland 20771
Email: hydrology-disc@listserv.gsfc.nasa.gov

Last update:Fri Jun 7 15:24:47 EDT 2002
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