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Earth Observing 1 (EO-1)


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Sensors

The three primary instruments on the EO-1 spacecraft are the Advanced Land Imager (ALI), the Hyperion, and the Linear Etalon Imaging Spectrometer Array (LEISA) Atmospheric Corrector (LAC). The EO-1 ALI consists of a 15 Wide Field Telescope (WFT) and partially populated focal plane occupying 1/5th of the field-of-view, giving a ground swath width of 37 km. Hyperion is a grating imaging spectrometer having a 30 meter ground sample distance over a 7.7 kilometer swath. It provides 10nm (sampling interval) contiguous bands of the solar reflected spectrum from 400-2500nm. LAC is an imaging spectrometer covering the spectral range from 900 to 1600 nm, which was well suited for the EO-1 Science Validation Team to monitor the atmospheric water absorption lines for correction of atmospheric effects in multispectral imagers during the first year.

Level 1R products for ALI and Hyperion are distributed by the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS), but LAC data are not being collected nor distributed during the Extended Mission. A summary of each instrument's characteristics is available through the links below.

ALI Photo LEISA photo Hyperion Photo
ALI LEISA Atmospheric Corrector Hyperion