Phoenix, Arizona
ASTER visible/near infrared bands 3 (R), 2(G), and 1(B)
Technical Information
The ASTER User's Handbook V2 (http://asterweb.jpl.nasa.gov/documents/aster_user_guide_v2.pdf ) gives the geolocation accuracy ("pixel geolocation knowledge") for the instrument as:
Relative - < 15 m
Absolute - < 50 m
Additional geometric precision information (inter and intra telescope registration) is available in the Geometry section of the User's Guide.
The datum, rotation, and other geolocation data are located in the original .hdf header as described in this extract from the User's Handbook:
"All the required attributes for geo-registering an ASTER Level-1B image are available from the embedded metadata in the hdf file and include:
SCENEFOURCORNERS
MAPORIENTATIONANGLE
PROCESSINGPARAMETERS (Projection information)
o MPMETHOD
o UTMZONECODE
o RESMETHOD
SCENEFOURCORNERS represent the geodetic latitude and longitude coordinates (UPPERLEFT, UPPERRIGHT, LOWERLEFT, LOWERRIGHT) of the ASTER Level-1B scene. The MAPORIENTATIONANGLE denotes the angle of rotation between the path-oriented image and the transformed map-projected coordinates. Ranging from -180° to +180°, it provides the amount by which the ASTER Level-1B image is rotated from True North.
The PROCESSINGPARAMETERS object group lists a number of attributes among which MPMETHOD lists the projection used and UTMZONECODE provides the zone information. The PROCESSINGPARAMETERS object group is numbered 1 through 14 for each of the ASTER bands (VNIR, SWIR and TIR). The component objects within this group are also numbered likewise."
The .hdf header info can be dumped into a text file via the ASTER processing page. Geolocation data is also included in the .twf file associated with downloaded geotiff products.
Related ASTER Stuff
Logging and Statistics site for the Aster project (logservlet)
ASTER Index Map for Arizona and Surrounding States
Japan ASTER Ground Data System
EOS Data Gateway (for ordering NASA remote sensing products)
Flagstaff
Flyover - ASTER visible-near infrared image draped over NED rendered in
ESRI ArcGIS
Warning!!! - This is a large file (355 Mb), but well worth
the time on a high speed connection.