PARASOL (Polarization & Anisotropy of Reflectances for Atmospheric Sciences coupled with Observations from a Lidar) 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.
It flew in formation in the "A Train" constellation 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.
The satellite's mission was formally ended exactly 9 years after launch on December 18, 2013. 
- The PARASOL Satellite Moving Off the A-Train's Track, Angelita Kelly & Rob Gutro, Goddard Space Flight Center, 4 January 2009, accessed 6 January 2009
- PARASOL eoPortal Directory accessed 14 June 2016
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