Information for ASTER Images: Jordan

Information for ASTER images: Jordan Advanced Spaceborne Thermal Emission and Reflection Radiometer

Created by Erin DiMaggio Email: [email protected] Last updated 6/20/05

There are three folders: lev 1a: This folder contains original reconstructed unprocessed instrument data – there are seven images and each has a metadata file. For more information see: http://edcdaac.usgs.gov/aster/ast_l1a.asp lev 1b: This folder contains data that is registered radiance at the sensor – there are seven images and each has a metadata file. For more information see: http://edcdaac.usgs.gov/aster/ast_l1b.asp

ASTER georef: There are 3 subfolders labeled VIS, SWIR and THRM Use this data for further processing in Arc (using .tif file) or ENVI (using .tif or .hdr) or other applicable programs… o Folders contain: Geo-tiff and .hdr files for each of the seven ASTER images and all have been geo-referenced (WGS_1984_UTM_Zones 36 or 37) using ENVI 4.0. For information on how to geo-reference using ENVI see the following websites: o http://activetectonics.la.asu.edu/Docs.html http://dana.ess.washington.edu/~bill/ess422/ASTER_GeoRef_FINAL.pdf

o To name these files I used ast to denote them as aster images, then vis denotes what bands were used (vis, swir, thrm) and then the last three digits from the ASTER L1B data granule to denote which image it is, and finally georef or georef means that it has been geo-referenced. Example: astvis_150_georf.tif Example: astswir_150_georf.tif Example: astthrm_150_georf.tif

o Band Combinations Used . VIS: RGB = Bands 3-2-1 respectively . SWIR: RGB = Bands 4-6-8 respectively . THRM: RGB = Bands 13-12-10 respectively o I have played around with some of the intensity of the colors of the tif files so that they look good in Arc (only VIS). The .hdr files have not been altered besides being geo-referenced.

To view that ASTER user handbook: (http://asterweb.jpl.nasa.gov/content/03_data/04_Documents/aster_user_guide_v2.pdf)

Individual Scene Data (obtained from metadata file)

The long ID # that is in blue is the 1b data ID number. The first data ID # (below) shows how to read the data ID # to read the acquisition and production dates, but all are provided. Below that are the geo-referenced files that relate to that particular image (each can be found in their respective folders). They are color coded with maroon = visible / light blue = swir / and orange = thermal. The band distinction can also be found within the name ‘astvis’ vs. ‘astswir’

There are seven total ASTER scenes in this data set

AST_L1B_003_07202001083039_07282001065150.hdf Acquisition Date: 07/20/2001 (mm/dd/yyyy) Time: 08:30:39 (hh/mm/ss) Production Date: Date: 07/28/2001 (mm/dd/yyyy) Time: 06:51:50 (hh/mm/ss)

Geo-referenced files: astvis_150_georef.hdr astvis_150_georf.tif astswir_150_georf.hdr astswir_150_georef.tif astthrm_150_georf.hdr astthrm_150_georef.tif (Files in the following formats are also included for use in Arc; .aux .rrd .tfw)

AST_L1B_003_09162002082957_10102002081456.hdf Acquisition Date: 09/16/2002 Time: 08:29:57 Production Date: Date: 10/10/2002 Time: 08:14:56 Geo-referenced files: astvis_456_georef.hdr astvis_456_georf.tif astswir_456_georf.hdr astswir_456_georef.tif astthrm_456_georf.hdr astthrm_456_georef.tif

AST_L1B_00306152003082831_07032003161935.hdf Acquisition Date: 06/15/2003 Time: 08:28:31 Production Date: Date: 07/03/2003 Time: 16:19:35 Geo-referenced files: astvis_935_georef.hdr astvis_935_georf.tif astswir_935_georf.hdr astswir_935_georef.tif astthrm_935_georf.hdr astthrm_935_georef.tif