July 12, 2017:
CALIPSO - IIR Level 1 Version 2.00 Data Available
The Atmospheric Science Data Center (ASDC) at NASA Langley Research Center
in collaboration with the CALIPSO mission announces the release of the following data product:
Version 2.00 of the IIR Level 1 product is the first major revision since
the initial release in 2006. The calibration procedure has bee adjusted to reduce known small
seasonal calibration biases in the Northern Hemisphere, which were caused by thermal drifts
synchronized with the elapsed time since the night-to-day transition.
The product is available from June 13, 2006 to current. The Version 1
standard and expedited products will continue to be generated and provided to the public.
There is no expedited version of the Version 2.00 IIR Level 1 planned for this release.
Inforamtion about this 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
June 09, 2017 - 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 late May 2017. The frequency of low energy
laser shots will increase within the SAA and surrounding regions during the remainder
of lifetime of the current laser. Quality of level 2 data products is also degraded
within this region since they are derived from level 1B data. Low energy profiles
and level 2 data derived from them should not be used for scientific analyses.
Low energy laser shots are indicated by the "QC_Flag" SDS within the lidar
level 1B data product. The 5th bit of the QC_Flag should be queried to identify
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 …
» CALIPSO’s Data Availability Tool
» CALIPSO’s Search and Subsetting Web Application