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QuikSCAT, launched in June 1999, and TRMM, launched 18 months earlier, provide scientists the opportunity to observe both wind and rain before a storm makes landfall.

Typhoon Bilis Gets Caught Smacking Taiwan
 Pasadena - August 24, 2000 - As super Typhoon Bilis, equal in strength to a category 5 hurricane, bears down on Taiwan, images taken by two NASA instruments on August 21, 2000, show the massive storm's most devastating components: rain and wind.

Conventional satellite data provide imagery of the clouds at the top of a storm. These images, however, were created by combining data from two NASA instruments capable of looking through a storm's clouds and seeing what is going on at the surface. These two instruments passed over the same location about one hour apart.

The images show the surface winds, measured by SeaWinds on QuikSCAT's radar scatterometer. The wind data are superimposed on rainfall measurements made by the microwave imager on the Tropical Rain Measuring Mission satellite (TRMM).

  • Ttyphoon Bilis Images
  • SeaWinds
  • TRMM

    TERRADAILY.COM
     Solving A Wobbly Question Of Oceanic Proportions
     Pasadena - July 17, 2000 - The century old mystery of Earth's "Chandler wobble" has been solved by a scientist at NASA's Jet Propulsion Laboratory in Pasadena, California. The Chandler wobble, named for its 1891 discoverer, Seth Carlo Chandler, Jr., an American businessman turned astronomer, is one of several wobbling motions exhibited by the Earth as it rotates on its axis, much as a top wobbles as it spins.




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