Flying On The Terra Spacecraft
The Data Pool at the Land Processes Distributed Active Archive Center (LP DAAC) is an online archive that provides FTP access to selected LP DAAC data products. ASTER Data Pool coverage includes all Level 1B scenes acquired over the United States and Territories. A simple 'drill-down' web interface is used to quickly locate data of interest. Metadata and most browse data can be viewed directly in your browser. Data granules can be downloaded via ftp. If you are new to the Data Pool, please read Data Pool Help and Release Notes to get a quick overview of the 'drill-down' interface. Note that the contents of the Data Pool will not always match the contents of the EOS Data Gateway. If the desired data is not found in the Data Pool archives, try searching the EOS Data Gateway (EDG). Missing granules cannot be inserted into the Data Pool archive.
ASTER data distributed from the Land Processess Distributed Active Archive Center is available in the Universal Transverse Mercator (UTM) projection, with a resampling method of cubic convolution for daytime scenes and nearest neighbor for nighttime scenes. Files are in the HDF-EOS format. The following products and services are available: On-Demand Products are created by applying a specific processing algorithm to Level 1B data (Level 1A in the case of the ASTER DEM). All of these higher-level products are available upon request, but only if a Level 1B scene with the correct bands exists: Level 2 On-Demand Decorrelation Stretch (VNIR, SWIR & TIR) Level 2 Brightness Temperature (TIR) Level 2 Surface Emissivity (TIR) Level 2 Surface Reflectance (VNIR & SWIR) Level 2 Surface Kinetic Temperature (TIR) Level 2 Surface Radiance (VNIR & SWIR) Level 2 Surface Radiance (TIR) Level 3 ASTER DEM; created from Level 1A data
Satellite Instruments
ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) is an imaging instrument flying on Terra, a satellite launched in December 1999 as part of NASA's Earth Observing System (EOS). ASTER is a cooperative effort between NASA, Japan's Ministry of Economy, Trade and Industry (METI) and Japan's Earth Remote Sensing Data Analysis Center (ERSDAC). The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) is one of a number of instruments on board the Terra platform, which was launched in December 1999. ASTER provides fourteen spectral bands with 15- to 90-meter resolution depending on bands. ASTER does not acquire data continuously, and its sensors are activated only to collect specific scenes upon request. The instrument consists of three separate telescopes, each of which provides different spectral range and resolution. The VNIR (visible and near-infrared) sensor provides 4 bands at 15-meter resolution. The SWIR (short-wave infrared) sensor provides 6 bands at 30-meter resolution. The SWIR (shortwave infrared) channels are no longer working (since April 2008). The TIR (thermal infrared) sensor provides 5 bands at 90-meter resolution. The swath width for all sensors is 60 kilometers.
Michael Abrams
Jet Propulsion Laboratory
MS 183-501 4800 Oak Grove Drive Pasadena , CA 91109-8099 USA
(818) 354-0937
Measurment TypeVisible/IR-imager
Platform TypeASTER
OrbitSun synchronous
Spectral Coverage
Scan PatternCross track
Repeat Time
Wavelength0.52 to 11.65um
Number of Bands14
Start DateFeb 2000
Temporal CoverageLaunch date 18 December 1999
Swath Width60
Resolution 115m
Resolution 230m
Resolution 390m
There are roughly 1,750 publications in circulation relating to ASTER - see the ASTER web site under "Presentations and Documents" for a comprehensive list.
ASTER consists of three separate instrument subsystems. Each subsystem operates in a different spectral region, has its own telescope(s), and was built by a different Japanese company. See the ASTER web site under MISSION - Instrument for specific details.
30 Sep 2009 12:51