Download Aster Satellite Images

ASTER satellite sensor is one of the five state-of-the-art instrument sensor systems on-board the Terra satellite that was launched on December 18, 1999, at Vandenberg Air Force Base, California, USA.

ASTER satellite image data is expected to contribute to a wide array of global change-related application areas, including vegetation and ecosystem dynamics, hazard monitoring, geology soils, land surface climatology, hydrology, and the generation of digital elevation models (DEMs).

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The Advanced Spaceborne Thermal Emission and Reflection Radiometer obtains high-resolution (15 to 90 square meters per pixel) images of the Earth in 14 different wavelengths of the electromagnetic spectrum, ranging from visible to thermal infrared light. Scientists use ASTER data to create detailed maps of land surface temperature, emissivity, reflectance, and elevation.

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) is a Japanese remote sensing instrument onboard the Terra satellite launched by NASA in 1999. It has been collecting data since February 2000.

ASTER provides high-resolution images of Earth in 14 different bands of the electromagnetic spectrum, ranging from visible to thermal infrared light. The resolution of images ranges between 15 and 90 meters. ASTER data is used to create detailed maps of surface temperature of land, emissivity, reflectance, and elevation.[1]

On 29 June 2009, the Global Digital Elevation Model (GDEM) was released to the public.[8][9]A joint operation between NASA and Japan's Ministry of Economy, Trade and Industry (METI), the Global Digital Elevation Model is the most complete mapping of the earth ever made, covering 99% of its surface.[10]The previous most comprehensive map, NASA's Shuttle Radar Topography Mission, covered approximately 80% of the Earth's surface,[11] with a global resolution of 90 meters,[12] and a resolution of 30 meters over the USA.The GDEM covers the planet from 83 degrees North to 83 degrees South (surpassing SRTM's coverage of 56 S to 60 N), becoming the first earth mapping system that provides comprehensive coverage of the polar regions.[11] It was created by compiling 1.3 million VNIR images taken by ASTER using single-pass[13] stereoscopic correlation techniques,[8] with terrain elevation measurements taken globally at 30-meter (98 ft) intervals.[10]

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) sensor is one of five sensors on board NASA's Terra satellite. ASTER data and imagery are crucial tools for monitoring volcanoes for any clues of imminent eruptions, for studying volcanoes during an eruption, and for analyzing impacts after an eruption. Scientists use ASTER imagery to study the composition and temperature of gasses emitted by a volcano, to look for changes to surface temperatures, and to interpret topographic and geological features. The ASTER sensor has three telescopes: visible near infrared (VNIR), shortwave (SWIR), and thermal infrared (TIR). This video highlights the use of VNIR imagery and TIR imagery to study volcanic gas composition and surface temperature changes. It also highlights the use of stereoscopic imagery to study topographic and geologic features. ASTER is a partnership between NASA, Japan's Ministry of Economy, Trade and Industry (METI), and Japan Space Systems (J-spacesystems). Note: This data visualization was created using NASA's ASTER Level 1 Precision Terrain Corrected Registered At-Sensor Radiance (AST_L1T) data distributed by the NASA Land Processes Distributed Active Archive Center (LP DAAC), located at the USGS Earth Resources Observation and Science (EROS) Center. For more information:

This work proposes a new method to classify multi-spectral satellite images based on multivariate adaptive regression splines (MARS) and compares this classification system with the more common parallelepiped and maximum likelihood (ML) methods. We apply the classification methods to the land cover classification of a test zone located in southwestern Spain. The basis of the MARS method and its associated procedures are explained in detail, and the area under the ROC curve (AUC) is compared for the three methods. The results show that the MARS method provides better results than the parallelepiped method in all cases, and it provides better results than the maximum likelihood method in 13 cases out of 17. These results demonstrate that the MARS method can be used in isolation or in combination with other methods to improve the accuracy of soil cover classification. The improvement is statistically significant according to the Wilcoxon signed rank test.

Advanced spaceborn thermal emission and reflection radiometer (ASTER) has fine spectral bands in short-wave infrared (SWIR) and thermal infrared (TIR) regions of the electromagnetic spectrum. The purpose behind the study is to explore the potential of ASTER for lithological and minerals detection; in comparison with Landsat-ETM+ Khaira Murat range (KMR) of Gali Jagir area, district Attock was selected as a test site; enriched with industrial minerals of the Eocene age. Maximum likelihood classification was applied on Landsat-ETM+ and ASTER images. Maximum likelihood classification on ASTER satellite image exhibits better discrimination among various lithologies as compared to Landsat-ETM+. Classified image of ASTER showed a correlation coefficient of 0.6 with the geological survey of Pakistan's map while a classified image of Landsat-ETM+ exhibited a correlation of only 0.43. Landsat-ETM+ and ASTER satellite images were further investigated for minerals detection. Landsat-ETM+ band ratio detected clay. ASTER SWIR band ratios detected various clay and carbonate minerals. X'PertPRO diffractometer and differential thermal analysis of field samples verified the detected minerology. The results suggest that ASTER can be successfully used for lithological and minerals mapping of less-examined areas.

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) obtains high-resolution images of Earth in 14 different wavelengths of the electromagnetic spectrum, ranging from visible to thermal infrared light. Scientists use ASTER data to create detailed maps of land surface temperature, emissivity, reflectance, and elevation. ASTER is the only high spatial resolution instrument aboard the Terra satellite.

An 8-kilometer (5-mile) wide crater of possible impact origin is shown in this stereoscopic view of an isolated part of the Bolivian Amazon. The view is derived from an Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) satellite image and a Shuttle Radar Topography Mission (SRTM) elevation model. The circular feature covering much of the image, known as the Iturralde Structure, is possibly the Earth's most recent "big" impact event recording collision with a meteor or comet that might have occurred between 11,000 and 30,000 years ago.Although the structure was identified on satellite photographs in the mid-1980s, its location is so remote that it has only been visited by scientific investigators twice, most recently by a team from NASA's Goddard Space Flight Center in September 2002. Lying in an area of very low relief, the landform is a quasi-circular closed depression only about 20 meters (66 feet) in depth, with sharply defined sub-angular "rim" materials. It resembles a "cookie cutter" in that its appearance "cuts" the heavily vegetated soft-sediments and pampas of this part of Bolivia. The SRTM data have provided investigators with the first topographic map of the site and will allow studies of its three-dimensional structure crucial to determining whether it actually is of impact origin.This stereoscopic image was generated by first draping the ASTER satellite image over the Shuttle Radar Topography Mission digital elevation model. Two differing perspectives were then calculated, one for each eye. They can be seen in 3-D by viewing the left image with the right eye and the right image with the left eye (cross-eyed viewing) or by downloading and printing the image pair and viewing them with a stereoscope. When stereoscopically merged, the result is a vertically exaggerated view of Earth's surface in its full three dimensions.Thick vegetation in part defines the surface that the SRTM radar sees as it maps the terrain. Much of the local "topography" in this area is a measure of tree height (typically up to 13 meters, or 40 feet). This effect is easily seen here, where the ground surface relief is very low. Interpretative separation of the ground surface and vegetative features can typically be made by recognition of their characteristic patterns. However, by integrating the ASTER data into the visualization, spectral colors help the recognition of terrain features (green vegetation and blue water).The ASTER instrument is a cooperative project between NASA, JPL, and the Japanese Ministry of International Trade and Industry, and it flies aboard NASA's Terra satellite.Elevation data used in this image was acquired by the Shuttle Radar Topography Mission aboard Space Shuttle Endeavour, launched on Feb. 11, 2000. The mission used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on Endeavour in 1994. The Shuttle Radar Topography Mission was designed to collect 3-D measurements of Earth's surface. To collect the 3-D data, engineers added a 60-meter (approximately 200-foot) mast, installed additional C-band and X-band antennas, and improved tracking and navigation devices. The mission is a cooperative project between NASA, the National Imagery and Mapping Agency (NIMA) of the U.S. Department of Defense, and the German and Italian space agencies. It is managed by NASA's Jet Propulsion Laboratory, Pasadena, Calif., for NASA's Earth Science Enterprise, Washington, D.C.Size: 16.3 kilometers (10.1 miles) North-South by 14.5 kilometers (9.0 miles) East-West

Location: 12.6 degrees South latitude, 67.7 degrees West longitude

Orientation: North at top, Latitude-Longitude projection

Image: ASTER band 1,2,3 combinations as red, green, blue.

Original Data Resolution: SRTM 1 arcsecond (about 30 meters or 98 feet), ASTER 15 meters (about 49 feet)