March 04, 2022: Data Release of CALIPSO LIDAR Level 2 Polar Stratospheric Cloud Mask Product Version 2.00
The CALIPSO mission team, in collaboration with the Atmospheric Science Data Center (ASDC) at NASA Langley Research Center, announces the release of a new CALIOP Level 2 Polar Stratospheric Cloud (PSC) Mask Daily Product:
The CALIPSO Lidar Level 2 Polar Stratospheric Cloud data product ensemble describes the spatial distribution, optical properties, and composition of PSC layers observed by the CALIPSO lidar (CALIOP). The product contains profiles of PSC presence, composition, optical properties, and meteorological information on a uniform 5-km horizontal x 180-m vertical grid along CALIPSO orbit tracks. Aura Microwave Limb Sounder (MLS) measurements of the primary PSC condensable vapors HNO3 and H2O and several parameters from the Aura MLS V2 Derived Meteorological Products (DMPs) are also included in the V2 PSC data product ensemble. Validation of the Level 2 PSC products is an on-going process. In the absence of simultaneous in situ particle observations, the CALIOP PSC detection and composition classification scheme can only be evaluated through comparison with other remote measurements that provide information on particle composition. All studies to date indicate that the PSC detection and composition algorithms are performing well.
Information about this new data product including data availability, user
documentation and quality statements, relevant links, sample read software, and
tools for working with the data, etc. can be found at the following ASDC link:
An in-depth data quality summary and description can be found in the following CALIPSO links:
May 04, 2020 - ATTENTION:
Due to errors seen in the Level 0 data from the WFC starting on April 11th, 2020
CALIPSO has suspended processing and distribution of the Level 1 standard and expedited WFC products.
IIR Level 2 processing scripts have been modified to ignore the loss of the WFC data stream
with minimal impact to the data. Browse images will continue to be generated without the
June 20, 2018 - ATTENTION: ONGOING
CALIOP is experiencing an elevated frequency of low energy laser shots within and
near the South Atlantic Anomaly (SAA) region which has degraded the science
quality of affected profiles since September 2016.
Please see the
Low Laser Energy Advisory
page for further information and guidance for identifying affected profiles.
The Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) satellite provides new insight into the role that clouds and atmospheric aerosols (airborne particles) play in regulating Earth's weather, climate, and air quality.
CALIPSO combines an active lidar instrument with passive infrared and visible imagers to probe the vertical structure and properties of thin clouds and aerosols over the globe. CALIPSO was launched on April 28, 2006 with the cloud profiling radar system on the CloudSat satellite.
CALIPSO and CloudSat are highly complementary and together provide new, never-before-seen 3-D perspectives of how clouds and aerosols form, evolve, and affect weather and climate. CALIPSO and CloudSat fly in formation with three other satellites in the A-train constellation to enable an even greater understanding of our climate system from the broad array of sensors on these other spacecraft.
CALIPSO is a joint U.S. (NASA) and French (Centre National d’Etudes Spatiales/CNES) satellite mission that has been in operation for four years. » Read more …
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