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Named for 19th century explorer Meriwether Lewis


Designation 24909 / 97044A
Launch date 23 Aug 1997
Country of origin USA
Mission Scientific: Remote sensing
Perigee/Apogee 300 km
Inclination 97.5°
Period 95 min
Launch vehicle Athena #2
Launch site Vandenberg SLC6

Part of the Small Spacecraft Technology Initiative (SSTI), for NASA.

End of life

Out of service 26 Aug 1997
Cause Went out of control after wrong maneuver
Decay 28 Sep 1997

It would have flown 3 imaging spectrometers to gather high resolution spectral images of the Earth's surface and atmosphere, celestial objects. 5 m resolution Panchromatic, 30 m resolution Multispectral

Total cost for NASA: $64.8 million An additional $6.2 million was spent for 1-year storage and maintenance due to delayed launch

External resources


sat-index articles

Technical data


Prime contractor TRW
Platform STEP
Mass at launch 385 kg
Mass in orbit  
Solar array  
Stabilization 3-axis
DC power 370 W
Design lifetime 5 years

Telemetry: 2275.3 MHz (8 kbps)
Command: 2095.172 MHz (2 kbps)
Data: 2275.3 MHz (2.048 Mbps)


HSI: Hyper Spectral Imager (will enable to collect data in 384 channels whereas currently standard instruments are limited to 20 channels (range 0.4 µm to 2.5 µm)) (built by TRW)
LEISA: Linear Etalon Imaging Spectral Array (built by NASA Goddard)
UCB: Ultraviolet Cosmic Background Experiment (built by Berkeley)

Lewis will also carry 15 technology demonstrations experiments.

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