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CALIPSO Data Sets

Image representing the CALIPSO project.

Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) was launched on April 28, 2006 to study the impact of clouds and aerosols on the Earth's radiation budget and climate. It flies in formation with five other satellites in the international "A-Train" (PDF) constellation for coincident Earth observations. The CALIPSO satellite comprises three instruments, the Cloud-Aerosol LIdar with Orthogonal Polarization (CALIOP), the Imaging Infrared Radiometer (IIR), and the Wide Field Camera (WFC). CALIPSO is a joint U.S. (NASA) and French (Centre National d'Etudes Spatiales-CNES) satellite mission with an expected 3 year lifetime.

Instrument Update: The CALIPSO Laser Switch was completed and normal operations resumed on March 12, 2009.

CALIPSO First Light image. June 2009: Release of Version 3.00 Lidar Level 1B data. Version 3.00 includes algorithm improvements, modifications to existing data parameters, and new data parameters. Algorithm improvements were implemented for the 532-nm daytime calibration, laser energy calculations, signal normalization by laser energy, and the interpolation of GMAO gridded data products to the CALIPSO orbit tracks. The modified data parameters include the Met_Data_Altitude array and quality flags QC_Flag and QC_Flag_2. The new data parameters describe the orbit and path number and are included in the file metadata. Detailed information for this release will be available in the Data Quality Statement that will be posted mid-June 2009.
The CALIPSO spacecraft reached a major milestone with the collection of its first data. One of the satellite's first lidar images released on July 24, 2006, gives a unique view of the atmosphere. (Read Full text)

Documentation Data Tools Relevant Links
Introductory Material:
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Detailed Theory:
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Software for working with data:

Available Data Sets: Current Data Sets | Previously Released Data Sets

Quality designators indicate the maturity of products and individual parameters, and include "Beta", "Provisional", "Validated Stage 1", "Validated Stage 2", and "Validated Stage 3". A product may contain parameters at varying quality levels.

Maturity Level Definitions
Beta: Early release products for users to gain familiarity with data formats and parameters.
Provisional: Limited comparisons with independent sources have been made and obvious artifacts fixed.
Validated Stage 1: Uncertainties are estimated from independent measurements at selected locations and times.
Validated Stage 2: Uncertainties are estimated from more widely distributed independent measurements.
Validated Stage 3: Uncertainties are estimated from independent measurements representing global conditions.

NOTE: The data in each data set are global, but are produced in files by half orbit, with the day portion of an orbit in one file and the night portion of the orbit in another.

Data Set Name
(Select name to order)
Description Parameters Documentation
Imaging Infrared Radiometer (IIR) Level 1B
CAL_IIR_L1-Prov-V1-11 (08/20/2008-present)
CAL_IIR_L1-Prov-V1-10 (06/13/2008-08/19/2008)
CALIPSO Imaging Infrared Radiometer Level 1B radiance data Infrared Radiance In Preparation
Imaging Infrared Radiometer (IIR) Level 2 Track
CAL_IIR_L2_Track-Prov-V2-02 (09/14/2008-present)
CAL_IIR_L2_Track-Beta-V2-01 (06/13/2006-12/31/2006, 02/18/2008-09/13/2008)
CALIPSO Imaging Infrared Radiometer Level 2 track data Emissivity, Cloud Properties In Preparation
Imaging Infrared Radiometer (IIR) Level 2 Swath
CAL_IIR_L2_Swath-Prov-V2-02 (09/14/2008-present)
CAL_IIR_L2_Swath-Beta-V2-01 (06/13/2006-12/31/2006, 02/18/2008-09/13/2008)
CALIPSO Imaging Infrared Radiometer Level 2 swath data Emissivity, Cloud Properties In Preparation
Lidar Level 1B
CAL_LID_L1-ValStage1-V3-00 (03/12/2009-06/10/2009) CALIPSO Lidar Level 1B profile data Lidar Attenuated Backscatter Quality Statement (V3)
CAL_LID_L1-Prov-V2-02 (09/14/2008-02/16/2009)
CAL_LID_L1-Prov-V2-01 (06/13/2006-09/13/2008)
Quality Statement (V2)
Lidar Level 2 Cloud and Aerosol Layer
CAL_LID_L2_05kmALay-Prov-V2-02 (09/14/2008-present)
CAL_LID_L2_05kmALay-Prov-V2-01 (06/13/2006-09/13/2008)
CALIPSO Lidar Level 2 5 km aerosol layer data Integrated Attenuated Backscatter, Column Reflectance, Lidar Depolarization Ratio, Aerosol Optical Thickness Quality Statement (V2)
CAL_LID_L2_333mCLay-Prov-V2-02 (09/14/2008-present)
CAL_LID_L2_333mCLay-Prov-V2-01 (06/13/2006-09/13/2008)
CALIPSO Lidar Level 2 1/3 km cloud layer data Integrated Attenuated Backscatter, Column Reflectance, Lidar Depolarization Ratio, Cloud Base Height, Cloud Top Height, Cloud Midlayer Temperature
CAL_LID_L2_01kmCLay-Prov-V2-02 (09/14/2008-present)
CAL_LID_L2_01kmCLay-Prov-V2-01 (06/13/2006-09/13/2008)
CALIPSO Lidar Level 2 1 km cloud layer data Integrated Attenuated Backscatter, Column Reflectance, Lidar Depolarization Ratio, Cloud Base Height, Cloud Top Height, Cloud Midlayer Temperature
CAL_LID_L2_05kmCLay-Prov-V2-02 (09/14/2008-present)
CAL_LID_L2_05kmCLay-Prov-V2-01 (06/13/2006-09/13/2008)
CALIPSO Lidar Level 2 5 km cloud layer data Integrated Attenuated Backscatter, Column Reflectance, Lidar Depolarization Ratio, Cloud Base Height, Cloud Top Height, Cloud Optical Depth
Lidar Level 2 Cloud and Aerosol Profile
CAL_LID_L2_05kmCPro-Beta-V2-02 (09/14/2008-present)
CAL_LID_L2_05kmCPro-Beta-V2-01 (06/13/2006-09/13/2008)
CALIPSO Lidar Level 2 5 km cloud profile data Backscatter Coefficient, Depolarization Ratio Profile, Extinction Coefficient Quality Statement (V2)
CAL_LID_L2_40kmAProCal-Beta-V2-02 (09/14/2008-present)
CAL_LID_L2_40kmAProCal-Beta-V2-01 (06/13/2006-09/13/2008)
CALIPSO Lidar Level 2 aerosol profile data using the CALIPSO Lidar Ratio selection algorithm Backscatter Coefficient, Depolarization Ratio Profile, Extinction Coefficient
Lidar Level 2 Vertical Feature Mask
CAL_LID_L2_VFM-Prov-V2-02 (09/14/2008-present)
CAL_LID_L2_VFM-Prov-V2-01 (06/13/2006-09/13/2008)
CALIPSO Lidar Level 2 Vertical Feature Mask data Aerosol Particle Properties, Cloud Type, Cloud Particle Phase Quality Statement (V2)
Wide Field Camera (WFC) Level 1B
CAL_WFC_L1_125m-Prov-V1-10 (06/13/2006-present) CALIPSO Wide Field Camera Level 1A 125 m Native Science data Radiance, Reflectance Quality Statement (V1)
CAL_WFC_L1_1Km-Prov-V1-10 (06/13/2006-present) CALIPSO Wide Field Camera Level 1A 1 km Native Science data Radiance, Reflectance
CAL_WFC_L1_IIR-Prov-V1-10 (06/13/2006-present) CALIPSO Wide Field Camera Level 1A 1 km Registered Science data Radiance, Reflectance

Please refer to CALIPSO Previously Released Data Sets if you need older versions of these data.

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