Earth Observing 1 (EO-1):
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.
1- Hyperspectral Sensors – Hyperion:
The Hyperion instrument provides a new class of Earth observation data for improved Earth surface characterization. The Hyperion provides a science grade instrument with quality calibration based on heritage from the LEWIS Hyperspectral Imaging Instrument (HSI). The Hyperion capabilities provide resolution of surface properties into hundreds of spectral bands versus the ten multispectral bands flown on traditional Landsat imaging missions. Through these spectral bands, complex land eco-systems can be imaged and accurately classified.
The Hyperion provides a high resolution hyperspectral imager capable of resolving 220 spectral bands (from 0.4 to 2.5 µm) with a 30-meter resolution. The instrument can image a 7.5 km by 100 km land area per image, and provide detailed spectral mapping across all 220 channels with high radiometric accuracy. The major components of the instrument include the following:
System fore-optics design based on the Korea Muli-Purpose Satellite (KOMPSAT) Electro Optical Camera (EOC) mission. The telescope provides for two separate grating image spectrometers to improve signal-to-noise ratio (SNR).
Download Hyperion world Index from here: https://goo.gl/kp8gbr
2- Multispectral Sensors – Advanced Land Imager (ALI):
The EO-1 ALI is the first Earth-Observing instrument to be flown under NASA’s New Millennium Program (NMP). The ALI employs novel wide-angle optics and a highly integrated multispectral and panchromatic spectrometer.
EO-1 is a technology verification project designed to demonstrate comparable or improved Landsat spatial and spectral resolution with substantial mass, volume, and cost savings. MIT Lincoln Laboratory developed the ALI with NMP instrument team members: Raytheon/Santa Barbara Remote Sensing (SBRS) for the focal plane system, and Sensor Systems Group, Inc. (SSG) for the optical system.
The EO-1 ALI is a technology verification instrument under the NMP. The focal plane for this instrument is partially populated with four sensor chip assemblies (SCA) and also covers 3° by 1.625°. Operating in a pushbroom fashion at an orbit of 705 km, the ALI provides Landsat type panchromatic and multispectral bands. These bands have been designed to mimic six Landsat bands with three additional bands covering 0.433-0.453, 0.845-0.890, and 1.20-1.30 µm. The ALI also contains wide-angle optics designed to provide a continuous 15° x 1.625° field of view for a fully populated focal plane with 30-meter resolution for the multispectral pixels and 10-meter resolution for the panchromatic pixels.
Download ALI world Index from here: https://goo.gl/bHg4oJ
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