EO-1

USA

Also called Earth Orbiter-1 or Earth Observing-1

Launch data:

Designation	26619 / 00075A
Launch date	21 Nov 2000 - 18:24:25 UT
Launch site	Va, SLC-2W
Launch vehicle	Delta 7320-10 (#D282)
Mission	Government: Earth Observation / Research
Sun-Synchronous LEO orbit:
Perigee / Apogee	682 x 729 km
Eccentricity	3,32E-03
Inclination	98.2 deg
Period	98.88 min

The first of three New Millennium Program Earth orbiting missions. EO 1 is an advanced land imaging mission that will demonstrate new instruments and spacecraft systems. EO 1 will validate technologies contributing to the reduction in cost of follow-on Landsat missions. The centerpiece of this mission is the Advanced Land Imager (ALI) instrument, which is one seventh the mass, power consumption and volume of the Landsat 7 imager.

It will match within one minute the Landsat 7 orbit and collect identical images for later comparison.

Specifications

Prime contractor	Swales Aerospace
Platform	midex-derived bus
Operator	NASA Earth Science Office
Mass at launch	572 kg
Mass in orbit
Dry mass	370 kg
Payload mass	90 kg
Dimension	1.25m across flats, 0.73m high -hexagonal right prism)
Solar array
Stabilization	3-axis
DC power	EOL: 600 W (experiment needs: 80 W)
Design lifetime	5 yrs - still active

Designation

Earth Observing-1 (EO-1) was a mission devoted entirely to the flight validation of 13 advanced technologies applicable to future land-imaging missions. The missions was approved in 1996 and launched in 2000. The technologies were validated within a year and the spacecraft was used on an extended mission to study the Earth.
Has a GPS receiver for navigation and timeming. 44 Gbit record. Downlink in X-band at 105 Mbps (XPAA) with a backup in S-band at 2 Mbps.
Equipment:
ALI (Advanced Land Imager): The ALI instrument will feature ten-meter ground resolution in the panchromatic (black-and-white) band and 30-meter ground resolution in its other spectral bands (0.4-2.4 microns), using a four-chip multispectral focal plane array that covers seven of the eight bands of the current Landsat.

AC (Atmospheric Corrector): The instrument will provide the first space-based test of an Atmospheric Corrector for increasing the accuracy of surface reflectance estimates. The AC enables more precise predictive models to be constructed for remote sensing applications. It will provide significant improvements in generating accurate reflectance measurements for land imaging missions. Covers the 0.890-1.600 micron wavelength IR band.

Hyperion: The Hyperion provides a science grade instrument with quality calibration based on heritage from the Lewis Hyperspectral Imaging Instrument. 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 this large number of spectral bands, complex land eco-systems shall be imaged and accurately classified. The Hyperion provides a high-resolution hyperspectral imager and can image detailed spectral mapping across all 220 channels with high radiometric accuracy. It covers the .4-2.5 micron wavelengths atn a resolution of 30 m.

Mission details:

One-year technology validation/demonstration mission; image Earth's surface in numerous wavelength bands.

Ref.: #6r, #7, #14, #15, #226 - update: 31.08.11

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