USGS EROS Archive - Earth Observing One (EO-1) - ALI

Science Center Objects

10- to 30-meter multispectral and hyperspectral data from the Earth Observing-1 (EO-1) Extended Mission.  (2000 to 2017) 

Back to Earth Observing One (EO-1)

ALI sample image 6,5,4 (RGB) Mt Fuji, Japan

ALI sample image 6,5,4
(RGB) Mt Fuji, Japan
(Public domain)

The Earth-Observing One (EO-1) satellite was decommissioned March 2017. The EO-1 satellite was launched on November 21, 2000 with the NASA's New Millennium Program (NMP). The NMP was an advanced-technology development program created a new generation of technologies and mission concepts into future Earth and space science missions. For more information on the final phase of the EO-1 mission: View EO-1 Phase F Report. All EO-1 ALI and Hyperion historical data will continue to be available through EarthExplorer for the foreseeable future. 

EO-1 Product Description

The Earth Observing-1 (EO-1) satellite was launched November 21, 2000 as a one-year technology demonstration/validation mission. After the initial technology mission was completed, NASA and the USGS agreed to the continuation of the EO-1 program as an Extended Mission. The EO-1 Extended Mission is chartered to collect and distribute Hyperion hyperspectral and Advanced Land Imager (ALI) multispectral products according to customer tasking requests.

Advanced Land Imager (ALI) Instrument on board the EO-1 spacecraft

Advanced Land Imager (ALI) provides image data from ten spectral bands (band designations). The instrument operates in a pushbroom fashion, with a spatial resolution of 30 meters for the multispectral bands and 10 meters for the panchromatic band. The standard scene width is 37 kilometers. Standard scene length is 42 kilometers, with an optional increased scene length of 185 kilometers (additional information).

All Hyperion and Advanced Land Imager (ALI) data in the archive will be attempted to be processed to the Level 1Gst level of correction. If the scene fails the Level 1Gst processing level, it will be removed from the archive and will become unavailable. As of June 15th, 2009, not all of the EO-1 data has been processed; please continue to check back if the scene of your interest is not available. We will be making attempts to process the failed scene as time and workload permits; however there are no guarantees that all of the EO-1 scenes will be able to be processed.

  • Level 1Gst is terrain corrected and provided in 16-bit radiance values. The data are available in Geographic Tagged Image-File Format (GeoTIFF) and are distributed via download at no charge through either EarthExplorer or GloVis.


Map projection UTM (default zone of the scene center coordinates)
Horizontal Datum WGS84
Resampling method CC (cubic convolution)
Image orientation Map (north up)
Pixel size 30 meter (10 meter pan band)
Format GeoTIFF
Output media Download (no charge)

Level 1Gst: Absolute Geodetic Accuracy Specification

The Level 1Gst product will also include terrain correction through use of a digital elevation model (DEM). This addition will correct parallax error due to topographic relief and improve the overall band-to-band registration accuracy. The elevation data used for correction consist of the Shuttle Radar Topography Mission (SRTM) "Finished" data set and other elevation data as required.

Coverage Maps

Coverage Maps indicating the availability of Earth-Observing One Advanced Land Imager products are available for download.

Additional Information

Access Data 

All EO-1 archived product images should be previewed prior to download. Browse images of all available scenes may be viewed by searching on EarthExplorer. For an alternative "quick and easy" browse image viewer, see USGS Global Visualization Viewer (GloVis).

Each Advanced Land Imager (ALI) browse image is generated from the Level 1 data and displayed as a 4,3,1 (RGB) band combination. Each band is linearly stretched between the 1% and 97% histogram values. The data is also reduced by a factor of 8 in each direction and jpeg compressed with a quality of 75%.

Digital Object Identifier (DOI)

Earth Observing One (EO-1) - ALI Large Scale Digital Object Identifier (DOI) number: /10.5066/F7QV3KG6