Number 272 (Story #3), May 23, 1996 by Phillip F. Schewe and Ben Stein THE GALILEO PROBE that penetrated Jupiter's atmosphere in December 1995 found only a fraction of the water expected. Further analysis of the probe data has turned up additional surprises. Wind speed at the surface was clocked at 150 m/sec; at the lower depths the speed did not fall off but actually increased to 200 m/sec. Lightning at Jupiter was observed to be less frequent than on Earth. Torrance Johnson of JPL, speaking at this week's meeting of the American Geophysical Union in Baltimore, said that now that all of the probe data had been downloaded, new software was being installed on the Galileo spacecraft to better prepare it for upcoming tasks, such as the June flyby of the moon Ganymede. Galileo will pass as close as 900 km and will take the best-ever pictures of the scarred moon.