Orbit Altitude: 705 km
Orbit Inclination: 98.2°
Equator Crossing: 10:01 a.m.
Period: 98.8 minutes
Repeat Cycle: 16 days
Orbit Type: LEO > Low Earth Orbit > Polar Sun-Synchronous

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Earth Observing-1 (EO-1) is an advanced land-imaging mission that will demonstrate new instruments and spacecraft systems. EO-1 will validate technologies contributing to the significant reduction in ... cost of follow-on Landsat missions. Launched on a Delta 7320 from Vandenberg Air Force Base, California, November 21, 2000. EO-1 has a 1-year primary mission but was designed to operate for an additional year.

The NMP EO-1 mission includes three advanced land imaging instruments and five revolutionary cross cutting spacecraft technologies. The hyperspectral instrument is the first of its kind to provide images of land-surface in more than 220 spectral colors. The Hyperion will demonstrate the ability to perform detailed spectral mapping with high radiometric accuracy. In the future, an operational version of the Hyperion will allow complex land ecosystems to be imaged and accurately classified. The Advanced Land Imager (ALI) instrument yields almost four times better performance at only one-fourth the cost and weight of the Landsat ETM+. Finally the Linear Etalon Imaging Spectral Array/Atmospheric Corrector (LEISA/AC) is an infrared camera, which can be used to remove the effects of the atmosphere from surface pictures obtained by instruments such as the ALI on EO-1 and Landsat. This instrument will provide scientific return both in terms of improved imagery and hyperspectral sensing capabilities. It will also test a number of new technologies. Because the AC is small and adaptable to different spacecraft configurations, it is a bolt-on instrument, which can be attached to any future Earth imaging spacecraft. The three advanced imaging instruments will lead to a new generation of lighter weight, higher performance and lower cost Landsat-type Earth surface imaging instruments.

Key EO-1 Facts:
Orbit
Type: Sun-synchronous
Equatorial Crossing: 10:01 a.m.
Altitude: 705 km
Inclination: 98.2°
Period: 98.8 minutes
Repeat Cycle: 16 days
Dimensions: 2 m height × 2.5 m diameter
Mass: 529 kg
Power: 300 W
Design Life: 18 months; EO-1 is well beyond its planned mission life and is
still functioning
Downlink: X-Band (105 Mbps), Sioux Falls, Svalbard, Alaska, Hobart (Australia)
Note: Part of the Morning Constellation of satellites, lags one minute behind
Landsat 7
Contributors
ALI: MIT/Lincoln Laboratory, NASA GSFC
Hyperion: TRW, NASA GSFC
LAC: NASA GSFC Applied Engineering and Technology Directorate (AETD)

[Summary provided by NASA]

http://eo1.gsfc.nasa.gov/
http://nmp.jpl.nasa.gov/
http://nasascience.nasa.gov/missions/eo-1