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 At 3:02 a.m. Pacific time on April 28. 2006. two NASA satellites. CloudSat and Calipso. 

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 were launched atop a Boeing Delta II rocket from Vandenberg Air Force Base. in California. 

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 Their Missions: to reveal the inner secrets of clouds and aerosols. 

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 The two satellites circle approximately 438 miles above Earth in a sun-synchronous polar orbit. flying in 

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 formation as members of NASA's "A-Train" constellation. which also includes three other satellites: Aqua. Aura and Parasol. 

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 Their technologies help scientists study how clouds and aerosols form. evolve and interact. 

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 offering insights into the workings of Earth's climate. while improving weather forecasting and predicting climate change. 

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