Everything about Cloudsat totally explained
CloudSat is a
NASA Earth observation satellite, which was launched on a
Delta II rocket on
April 28,
2006. It uses a radar to measure the altitude and properties of clouds, adding to information on the relationship between clouds and climate to help resolve questions about
global warming. CloudSat will fly in formation in the "
A Train" with several other satellites (
Aqua,
Aura,
CALIPSO and the French
PARASOL).
The mission was selected under NASA's Earth System Science Pathfinder program in 1999.
Ball Aerospace & Technologies Corp. in
Boulder, Colorado, designed and built the spacecraft.
The main instrument on CloudSat is the Cloud Profiling Radar (CPR), a 94-GHz nadir-looking
radar that measures the power backscattered by clouds as a function of distance from the radar. The CPR was developed jointly by NASA and the
Canadian Space Agency. The overall design of the CPR is simple, well understood, and has strong heritage from many cloud radars already in operation in ground-based and airborne applications. Most of the design parameters and subsystem configurations are nearly identical to those for the Airborne Cloud Radar, which has been flying on the NASA DC-8 aircraft since 1998.
CloudSat's primary mission is scheduled to continue for twenty-two months in order to allow more than one seasonal cycle to be observed. Based on radar lifetime data, NASA expects the radar is expected to operate for three years with a 99 % probability.
The CPR capitalizes on existing radar expertise and experience at the
Jet Propulsion Laboratory. Other radars already flown successfully or being developed by JPL include the
Seasat SAR, SIR-A, SIR-B, SIR-C, the
Shuttle Radar Topography Mission,
Cassini Radar, NSCAT,
QuickScat, and
SeaWinds.
The cost of this project is an estimated 600 million dollars.
Following is a sample radar profile from 3 minutes of one orbit from Cloudsat data processing cernter (CIRA/CSU).
A more conventional view of the this clouds is provided by MODIS in this infrared picture.
Further Information
Get more info on 'Cloudsat'.
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