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CALIPSO: Cloud and Aerosol Lidar Level 2 Vertical Feature Mask Version 4-20 Product (CAL_LID_L2_VFM-Standard-V4-20)

Status: Ongoing
Online Status: ONLINE
Publication State: Working
Publication Date:
Download Stats: last 12 months
Dataset Size: 72.02K Files | 3TB


CAL_LID_L2_VFM-Standard-V4-20 is the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) Lidar Level 2 Vertical Feature Mask (VFM), Version 4-20 data product. Data for this product was collected using the CALIPSO Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) instrument. Data generation and distribution of this V4.20 product ended on July 1, 2020 to support a change in the operating system of the CALIPSO production clusters. The V4.21 data product covers July 1, 2020 to current.

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 the international A-Train constellation for coincident Earth observations. The CALIPSO satellite comprises three instruments, CALIOP, Imaging Infrared Radiometer (IIR), and Wide Field Camera (WFC). CALIPSO is a joint satellite mission between NASA and the French Agency, CNES (Centre National D’Etudes Spatiales).

Citable as:  National Aeronautics and Space Administration (9999): CALIPSO: Cloud and Aerosol Lidar Level 2 Vertical Feature Mask Version 4-20 Product (CAL_LID_L2_VFM-Standard-V4-20). NERC Earth Observation Data Centre, date of citation.
Abbreviation: Not defined
Keywords: NASA, CALIPSO, CALIOP, Cloud, Aerosol


Previous Info:
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Previously used record identifiers:
No related previous identifiers.
Access rules:
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Use of these data is covered by the following licence: When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

These data were obtained from the NASA Langley Research Center Atmospheric Science Data Center and mirrored by CEDA.

File Format:
Data are HDF4 formatted

Process overview

This dataset was generated by a combination of instruments deployed on platforms and computations as detailed below.

Computation Element: 1

Title Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) Satellite
Abstract Deployed on Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) Satellite.
Input Description None
Output Description None
Software Reference None
Output Description


  • var_id: Day_Night_Flag
  • units: NoUnits
  • units: NoUnits
  • var_id: Feature_Classification_Flags
  • units: NoUnits
  • var_id: Land_Water_Mask
  • units: degrees
  • var_id: Latitude
  • units: degrees
  • var_id: Longitude
  • var_id: Minimum_Laser_Energy_532
  • units: joules
  • units: NoUnits
  • var_id: Profile_ID
  • units: seconds
  • var_id: Profile_Time
  • units: NoUnits
  • var_id: Profile_UTC_Time
  • units: kilometers
  • var_id: Spacecraft_Position
  • units: NoUnits
  • var_id: ssLand_Water_Mask
  • units: joules
  • var_id: ssLaser_Energy_532
  • units: degrees
  • var_id: ssLatitude
  • units: degrees
  • var_id: ssLongitude
  • units: NoUnits
  • var_id: ssProfile_ID
  • units: seconds
  • var_id: ssProfile_Time
  • units: NoUnits
  • var_id: ssProfile_UTC_Time

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