NASA has scheduled another launch attempt tomorrow morning for the CALIPSO and CloudSat satellites.

Weather is a concern. The forecast calls for a 40 percent probability of acceptable weather conditions. The primary issues are thick clouds, rain showers and isolated thunderstorms.

The launch attempt is set for 6:02 a.m. EDT Wednesday, April 26. Launch commentary on NASA TV starts at 4 a.m. EDT. A recorded CALIPSO and CloudSat launch status update is available at: (805) 734-2693.

Media wishing to cover tomorrow’s launch attempt should call Kathy Barnstorff at 344-8511 and meet at the NASA Langley main gate no later than 5:15 a.m.

To record the launch from NASA TV go to MPEG-2 digital C-band signal on AMC-6, at 72 degrees west longitude, Transponder 17C, 4040 MHz, vertical polarization. To view the launch at home on the computer go to:

http://www.nasa.gov/multimedia/nasatv

NASA Langley leads the CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) project. Data from CALIPSO will help scientists better understand Earth's clouds and airborne particles: answering questions about how they form, evolve, affect water supply, climate, weather and air quality. Launching on the same rocket is another NASA satellite, CloudSat. The two will fly just 15 seconds apart as part of NASA's "A-Train," a constellation of several Earth-observing satellites.

For more information on CALIPSO on the Internet, please visit:

http://www.nasa.gov/calipso

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