April 19, 2004

Donald Savage 
Headquarters, Washington
(Phone: 202/358-1727)

Steve Roy
Marshall Space Flight Center, Huntsville, Ala.
(Phone: 256/544-6535)

NOTE TO EDITORS: 04-057

GRAVITY PROBE B LAUNCH POSTPONED FOR 24 HOURS

The launch of NASA's Gravity Probe B spacecraft aboard a Boeing Delta 
II rocket has been scrubbed for 24 hours. 

A hold was called approximately three minutes before lift off, after 
it was determined there was insufficient time to confirm before 
launch the correct wind profile had been loaded aboard the Delta II 
based on the data from the final weather balloon. The team was 
waiting on this final weather balloon data due to marginal upper 
level wind conditions that were observed throughout the countdown. 

The launch is scheduled for 12:57:24 p.m. EDT on Tuesday. NASA TV 
launch coverage on Tuesday begins at 10:45 a.m. EDT. NASA TV is 
available on AMC-9, transponder 9C, C-Band, located at 85 degrees 
west longitude. The frequency is 3880.0 MHz. Polarization is 
vertical, and audio is monaural at 6.80 MHz. For information about 
NASA TV on the Internet, visit: 



http://www.nasa.gov/ntv

For information about GP-B on the Internet, visit:



http://einstein.stanford.edu and http://www.gravityprobeb.com.

	
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