PARASOL is a French-built Earth observing research satellite. It carries an instrument called POLDER which studies the radiative and microphysical properties of clouds and aerosols.
PARASOL was launched from the French spaceport in Kourou, French Guiana on December 18, 2004 by an Ariane 5 G+.
It flew in formation in the "A Train" constelletion with several other satellites (Aqua, CALIPSO, CloudSat and Aura). These satellites have, for the first time ever, combined a full suite of instruments for observing clouds and aerosols, from passive radiometers to active lidar and radar sounders.
On 2 December 2009, PARASOL was manoeuvred out of the A-Train, dropping some 4 km below the other satellites by early January 2010.[1]
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