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CALIPSO - Data User’s Guide - Data Product Descriptions


CALIPSO HOMECALIPSO’s User Guide HOME → Data Product Descriptions

Last Updated: October 13, 2020

The following tables list the CALIPSO latest produced versioned data products that are available from the Langley Atmospheric Science Data Center. To access the documentation for a particular data product, click on the name or the description in the table. To order CALIPSO data products, see the Order Data web page. The data products are grouped into the following categories:

Follow this link to read the tutorial on the lidar browse images.


Standard and Expedited Data Set Definitions

Standard Data Sets:

Standard data processing begins immediately upon delivery of all required ancillary data sets. The ancillary data sets used in standard processing (e.g., GMAO meteorological data from the National Snow and Ice Data Center) must be spatially and temporally matched to the CALIPSO data acquisition times, and thus the time lag latency between data onboard acquisition and the start of standard processing can be on the order of several days. 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.

Expedited Data Sets:

Expedited data are processed as soon as possible after following downlink from the satellite and delivery to Langley Research Center (LaRC). Latency between onboard acquisition and analysis expedited processing is typically on the order or 6 to 28 hours. Expedited processing uses the most recently current available set of ancillary data (e.g., GMAO meteorological profiles) and calibration coefficients available, which may lag the CALIPSO data acquisition time/date by several days.

Expedited data files contain at the most, 90 minutes of data. Therefore, each file may contain both day and night data.

NOTE: Users are strongly cautioned against using Expedited data products as the basis for research findings or journal publications. Standard data sets only should be used for these purposes.

The differences between expedited processing and standard processing are explained in more detail in Adapting CALIPSO Climate Measurements for Near Real Time Analyses and Forecasting (PDF).


Lidar Data - Version 4.x

Processing Level
Data Product Name
Strategies (v4.x)

Detailed Data Quality Documents
Example File Name*

Science Parameter Descriptions
Level 1 1B Profile Standard V4.10 & V4.11
CAL_LID_L1-Standard-V4-11, CAL_LID_L1-Standard-V4-10
Level 1.5 1.5 Profile Standard V1.00 & V1.01
CAL_LID_L15-Standard-V1-01, CAL_LID_L15-Standard-V1-00
Level 2 5 km Aerosol Layer Standard V4.20 & V4.21 CAL_LID_L2_05kmALay-Standard-V4-21, CAL_LID_L2_05kmALay-Standard-V4-20
5 km Cloud Layer Standard V4.20 & V4.21 CAL_LID_L2_05kmCLay-Standard-V4-21, CAL_LID_L2_05kmCLay-Standard-V4-20
5 km Merged Layer Standard V4.20 & V4.21 CAL_LID_L2_05kmMLay-Standard-V4-21, CAL_LID_L2_05kmMLay-Standard-V4-20
1 km Cloud Layer Standard V4.20 & V4.21 CAL_LID_L2_01kmCLay-Standard-V4-21, CAL_LID_L2_01kmCLay-Standard-V4-20
333 m Merged (cloud and aerosol) Layer Standard V4.20 & V4.21 CAL_LID_L2_333mMLay-Standard-V4-21, CAL_LID_L2_333mMLay-Standard-V4-20
5 km Aerosol Profile Standard V4.20 & V4.21 CAL_LID_L2_05kmAPro-Standard-V4-21, CAL_LID_L2_05kmAPro-Standard-V4-20
5 km Cloud Profile Standard V4.20 & V4.21 CAL_LID_L2_05kmCPro-Standard-V4-21, CAL_LID_L2_05kmCPro-Standard-V4-20
Vertical Feature Mask Standard V4.20 & V4.21 CAL_LID_L2_VFM-Standard-V4-21, CAL_LID_L2_VFM-Standard-V4-20
Blowing Snow - Antarctica Standard V1.00 & V1.01 CAL_LID_L2_BlowingSnow_Antarctica-Standard-V1-01, CAL_LID_L2_BlowingSnow_Antarctica-Standard-V1-00
Level 3 Ice Cloud Standard V1.00 CAL_LID_L3_Ice_Cloud-Standard-V1-00
Stratospheric Aerosol Profile Standard V1.00 & V1.01 CAL_LID_L3_Stratospheric_APro-Standard-V1-01, CAL_LID_L3_Stratospheric_APro-Standard-V1-00
Cloud Occurrence Standard V1.00 & V1.01 CAL_LID_L3_Cloud_Occurrence-Standard-V1-01, CAL_LID_L3_Cloud_Occurrence-Standard-V1-00
Tropospheric Aerosol Profile Standard V4.20 & V4.21 CAL_LID_L3_Tropospheric_APro-Standard-V4-21, CAL_LID_L3_Tropospheric_APro-Standard-V4-20
GEWEX Cloud Standard CAL_LID_L3_GEWEX_Cloud-Standard-V1-00

*This is the name prefix, date and time are excluded.


Lidar Data - Version 3.x

Processing Level
Data Product Name
Data_Maturity (DM)

Data Quality Summaries
Example File Name*

Science Parameter Descriptions
Level 1 1B Profile Validated Stage 1 Standard (DM): CAL_LID_L1-ValStage1-V3-41, CAL_LID_L1-ValStage1-V3-40, CAL_LID_L1-ValStage1-V3-30, CAL_LID_L1-ValStage1-V3-02, CAL_LID_L1-ValStage1-V3-01

Expedited (DM): CAL_LID_L1_Exp-Prov-V3-41, CAL_LID_L1_Exp-Prov-V3-40, CAL_LID_L1_Exp-Prov-V3-30
Level 1.5 1.5 Profile
Expedited Only
By Subscription Only
Expedited V3.50 & V3.51
CAL_LID_L15_Exp-ValStage1-V3-51, CAL_LID_L15_Exp-ValStage1-V3-50
Level 2 5 km Aerosol Layer Provisional Standard (DM): CAL_LID_L2_05kmALay-Prov-V3-41, CAL_LID_L2_05kmALay-Prov-V3-40, CAL_LID_L2_05kmALay-Prov-V3-30, CAL_LID_L2_05kmALay-Prov-V3-02, CAL_LID_L2_05kmALay-Prov-V3-01

Expedited (DM): CAL_LID_L2_05kmALay_Exp-Prov-V3-41, CAL_LID_L2_05kmALay_Exp-Prov-V3-40, CAL_LID_L2_05kmALay_Exp-Prov-V3-30
5 km Cloud Layer Provisional Standard (DM): CAL_LID_L2_05kmCLay-Prov-V3-41, CAL_LID_L2_05kmCLay-Prov-V3-40, CAL_LID_L2_05kmCLay-Prov-V3-30, CAL_LID_L2_05kmCLay-Prov-V3-02, CAL_LID_L2_05kmCLay-Prov-V3-01

Expedited (DM): CAL_LID_L2_05kmCLay_Exp-Prov-V3-41, CAL_LID_L2_05kmCLay_Exp-Prov-V3-40, CAL_LID_L2_05kmCLay_Exp-Prov-V3-30
1 km Cloud Layer Validated Stage 1 Standard (DM): CAL_LID_L2_01kmCLay-ValStage1-V3-41, CAL_LID_L2_01kmCLay-ValStage1-V3-40, CAL_LID_L2_01kmCLay-ValStage1-V3-30, CAL_LID_L2_01kmCLay-ValStage1-V3-02, CAL_LID_L2_01kmCLay-ValStage1-V3-01

Expedited (DM): CAL_LID_L2_01kmCLay_Exp-Prov-V3-41, CAL_LID_L2_01kmCLay_Exp-Prov-V3-40, CAL_LID_L2_01kmCLay_Exp-Prov-V3-30
333 m Cloud Layer Validated Stage 1 Standard (DM): CAL_LID_L2_333mCLay-ValStage1-V3-41, CAL_LID_L2_333mCLay-ValStage1-V3-40, CAL_LID_L2_333mCLay-ValStage1-V3-30, CAL_LID_L2_333mCLay-ValStage1-V3-02, CAL_LID_L2_333mCLay-ValStage1-V3-01

Expedited (DM): CAL_LID_L2_333mCLay_Exp-Prov-V3-41, CAL_LID_L2_333mCLay_Exp-Prov-V3-40, CAL_LID_L2_333mCLay_Exp-Prov-V3-30
5 km Aerosol Profile Validated Stage 1 Standard (DM): CAL_LID_L2_05kmAPro-Prov-V3-41, CAL_LID_L2_05kmAPro-Prov-V3-40, CAL_LID_L2_05kmAPro-Prov-V3-30, CAL_LID_L2_05kmAPro-Prov-V3-02, CAL_LID_L2_05kmAPro-Prov-V3-01

Expedited (DM): CAL_LID_L2_05kmAPro_Exp-Prov-V3-41, CAL_LID_L2_05kmAPro_Exp-Prov-V3-40, CAL_LID_L2_05kmAPro_Exp-Prov-V3-30
5 km Cloud Profile Provisional Standard (DM): CAL_LID_L2_05kmCPro-Prov-V3-41, CAL_LID_L2_05kmCPro-Prov-V3-40, CAL_LID_L2_05kmCPro-Prov-V3-30, CAL_LID_L2_05kmCPro-Prov-V3-02, CAL_LID_L2_05kmCPro-Prov-V3-01

Expedited (DM): CAL_LID_L2_05kmCPro_Exp-Prov-V3-41, CAL_LID_L2_05kmCPro_Exp-Prov-V3-40, CAL_LID_L2_05kmCPro_Exp-Prov-V3-30
Vertical Feature Mask Validated Stage 1 Standard (DM): CAL_LID_L2_VFM-ValStage1-V3-41, CAL_LID_L2_VFM-ValStage1-V3-40, CAL_LID_L2_VFM-ValStage1-V3-30, CAL_LID_L2_VFM-ValStage1-V3-02, CAL_LID_L2_VFM-ValStage1-V3-01

Expedited (DM): CAL_LID_L2_VFM_Exp-Prov-V3-41, CAL_LID_L2_VFM_Exp-Prov-V3-40, CAL_LID_L2_VFM_Exp-Prov-V3-30
Polar Stratospheric Cloud Mask Provisional Standard Only (DM): CAL_LID_L2_PSCMask-Prov-V1-11, CAL_LID_L2_PSCMask-Prov-V1-10, CAL_LID_L2_PSCMask-Prov-V1-00
Level 3 Aerosol Profile All Sky Standard Standard Only (DM): CAL_LID_L3_APro_AllSky-Standard-V3-10, CAL_LID_L3_APro_AllSky-Standard-V3-00
Aerosol Profile Cloud-Free Standard Standard Only (DM): CAL_LID_L3_APro_CloudFree-Standard-V3-10, CAL_LID_L3_APro_CloudFree-Standard-V3-00
Aerosol Profile Cloudy-Sky Transparent Standard Standard Only (DM): CAL_LID_L3_APro_CloudySkyTransparent-Standard-V3-10, CAL_LID_L3_APro_CloudySkyTransparent-Standard-V3-00
Aerosol Profile Cloudy-Sky Opaque Standard Standard Only (DM): CAL_LID_L3_APro_CloudySkyOpaque-Standard-V3-10, CAL_LID_L3_APro_CloudySkyOpaque-Standard-V3-00

*This is the name prefix, date and time are excluded.


Imaging Infrared Radiometer (IIR) Data (L1 - V2.00 and L2 - V4.20)

Processing Level
Data Product Name
Data_Maturity (DM)

Data Quality Summaries
Example File Name*

Science Parameter Descriptions
Level 2 Emissivity and cloud particle data
co-located to the lidar track
Standard V4.20 & V4.21 Standard Only (Strategies): CAL_IIR_L2_Track-Standard-V4-21, CAL_IIR_L2_Track-Standard-V4-20
Emissivity and cloud particle data
on a 1 km grid centered on the lidar track
Standard V4.20 & V4.21 Standard Only (Strategies): CAL_IIR_L2_Swath-Standard-V4-21, CAL_IIR_L2_Swath-Standard-V4-20

*This is the name prefix, date and time are excluded.
All IIR data are provided in a swath format.


Imaging Infrared Radiometer (IIR) Data (L1 - V1.x, L2 - V3.x)

Processing Level
Data Product Name
Data_Maturity (DM)

Data Quality Summaries
Example File Name*

Science Parameter Descriptions
Level 1 1B Radiance data Standard V2.00 & V2.01 Standard Only (Strategies): CAL_IIR_L1-Standard-V2-01, CAL_IIR_L1-Standard-V2-00
Level 1 1B Radiance data Standard

Provisional
Standard (DM): CAL_IIR_L1-Prov-V1-13, CAL_IIR_L1-Prov-V1-12, CAL_IIR_L1-Prov-V1-11, CAL_IIR_L1-Prov-V1-10

Expedited (DM): CAL_IIR_L1_Exp-Prov-V1-13, CAL_IIR_L1_Exp-Prov-V1-12
Level 2 Emissivity and cloud particle data
co-located to the lidar track
Standard

Beta
Standard (V3.46, V3.45, V3.40, V3.30) (DM): CAL_IIR_L2_Track-Beta-V3-46, CAL_IIR_L2_Track-Beta-V3-45, CAL_IIR_L2_Track-Beta-V3-40, CAL_IIR_L2_Track-Beta-V3-30
Standard (V3.01 and V3.02) (DM): CAL_IIR_L2_Track-Beta-V3-02, CAL_IIR_L2_Track-Beta-V3-01

Expedited (V3.46, V3.45, V3.40, V3.30) (DM): CAL_IIR_L2_Track_Exp-Beta-V3-46, CAL_IIR_L2_Track_Exp-Beta-V3-45, CAL_IIR_L2_Track_Exp-Beta-V3-40, CAL_IIR_L2_Track-Beta-V3-30
Emissivity and cloud particle data
on a 1 km grid centered on the lidar track
Standard

Beta
Standard (V3.46, V3.45, V3.40, V3.30) (DM): CAL_IIR_L2_Swath-Beta-V3-46, CAL_IIR_L2_Swath-Beta-V3-45, CAL_IIR_L2_Swath-Beta-V3-40, CAL_IIR_L2_Swath-Beta-V3-30
Standard (V3.01 and V3.02) (DM): CAL_IIR_L2_Swath-Beta-V3-02, CAL_IIR_L2_Swath-Beta-V3-01

Expedited (V3.46, V3.45, V3.40, V3.30) (DM): CAL_IIR_L2_Swath_Exp-Beta-V3-46, CAL_IIR_L2_Swath_Exp-Beta-V3-45, CAL_IIR_L2_Swath_Exp-Beta-V3-40, CAL_IIR_L2_Swath_Exp-Beta-V3-30

*This is the name prefix, date and time are excluded.
All IIR data are provided in a swath format.


Wide Field Camera (WFC) Data

Processing Level
Data Product Name
Data_Maturity (DM)

Data Quality Summaries
Example File Name*

Science Parameter Descriptions
Level 1 125 m Native Science data Validated Stage 1 Standard (DM): CAL_WFC_L1_125m-ValStage1-V3-02, CAL_WFC_L1_125m-ValStage1-V3-01

Expedited (DM): CAL_WFC_L1_125m_Exp-Prov-V3-02
1 km Native Science data Validated Stage 1 Standard (DM): CAL_WFC_L1_1Km-ValStage1-V3-02, CAL_WFC_L1_1Km-ValStage1-V3-01

Expedited (DM): CAL_WFC_L1_1Km_Exp-Prov-V3-02
1 km Registered Science data Validated Stage 1 Standard (DM): CAL_WFC_L1_IIR-ValStage1-V3-02, CAL_WFC_L1_IIR-ValStage1-V3-01

Expedited (DM): CAL_WFC_L1_IIR_Exp-Prov-V3-02

*This is the name prefix, date and time are excluded.
All WFC data are provided in a swath format.




File Naming Convention (v3.x)

The CALIPSO data product naming convention is defined as:

[Investigation]_[Subsystem]_[Level]_[ProductID]-[ProductionStrategy]-[Version].[Instance].hdf

where,

Investigation = Mission Name: CAL
Subsystem = LID | IIR | WFC
Level = Product Level: L0 | L1 | L2 | L3
ProductID = Product Identification: IIR | VFM | 1Km | 125m | 333mCLay | 01kmCLay | 05kmCLay |
                    05kmALay | 05kmAPro | 05kmCPro | APro_AllSky | APro_Combined | Exp | IIR_Exp |
                    VFM_Exp | 1Km | 125m_Exp | 333mCLay_Exp | 01kmCLay_Exp | PSCMask |
                    05kmCLay_Exp | 05kmALay_Exp | 05kmAPro_Exp | 05kmCPro_Exp |

ProductionStrategy = Data Maturity: Beta | Prov | ValStage1 | ValStage2 | ValStage3
Version = Version Information, e.g., V3-01
Instance = YYYY-MM-DDThh-mm-ssZ[D|N] | YYYY-MM[D|N] | YYYY-MM
File Format = Hiearchical Data Format: .hdf

For example, the file named: CAL_LID_L2_05kmAPro-Prov-V3-01.2010-04-17T20-09-13ZN.hdf would contain the following:

Investigation
CAL (CALIPSO mission)
Subsystem
LID (Lidar (Lidar 1.1))
Level
L2
Product ID
05kmAPro
Production Strategy or Release named
Prov (Provisional)
Version
V3-01
Instance:
  • Date 17 April, 2010 (data measurement date), (2010-04-17)
  • Time of first record: 20 hour, 09 minutes, 13 seconds (T20-09-13)
  • Nighttime conditions (N)
  • The data product version information is defined using the X.YY format, where
    X - Major Release Number
    tracks a major software release

    YY - Minor Release Number
    tracks a minor software release, e.g., change in GMAO data version, code or algorithm updates


    Data Maturity Level Definitions (v3.x)

    Beta: Early release products for users to gain familiarity with data formats and parameters. Users are strongly cautioned against
    the indiscriminate use of these data products as the basis for research findings, journal publications, and/or presentations.
    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.




    File Naming Convention (v4.x)

    The CALIPSO data product naming convention is defined as:

    [Investigation]_[Subsystem]_[Level]_[ProductID]-[ProductionStrategy]-[Version].[Instance].hdf

    where,

    Investigation = Mission Name: CAL
    Subsystem = LID | IIR | WFC
    Level = Product Level: L0 | L1 | L2 | L3 | L15
    ProductID = Product Identification: 1Km | 125m | VFM | 333mCLay | 01kmCLay | 05kmCLay |
                        05kmALay | 05kmAProCal | 05kmCPro | PSCMask | Ice_Cloud | Stratospheric_APro |

    ProductionStrategy = Test | Beta | Quick Look | Expedited | Standard
    Version = Version Information, e.g., V4-10
    Instance = YYYY-MM-DDThh-mm-ssZ[D|N] | YYYY-MM[D|N|A] | YYYY-MM
    File Format = Hiearchical Data Format: .hdf

    For example, the file named: CAL_LID_L1-Standard-V4-10.2010-04-17T20-09-13ZN.hdf would contain the following:

    Investigation
    CAL (CALIPSO mission)
    Subsystem
    LID (Lidar)
    Level
    L1
    Product ID
    none for level 1 data
    Production Strategy
    Standard
    Version
    V4-10
    Instance:
  • Date 17 April, 2010 (data measurement date), (2010-04-17)
  • Time of first record: 20 hour, 09 minutes, 13 seconds (T20-09-13)
  • Nighttime conditions (N)
  • The data product version information is defined using the X.YY format, where
    X - Major Release Number
    tracks a major software release

    YY - Minor Release Number
    tracks a minor software release, e.g., change in GMAO data version, code or algorithm updates


    Version 4.x Data Product Production Strategies Definitions (v4.x)

    Test: Preliminary data products for which science algorithms, file contents and/or file structure are still under development; not pubilcly distributed.
    Beta: Early release products for users to gain familiarity with data formats and parameters; not generally available for public download. Products designated as ‘beta’ should not be used as the basis for research findings or journal publications.
    Quick Look: Very rapid processing to ensure earliest distribution at the expense of some degradation of data quality; calibration coefficients may be obtained from historical data; level 2 analyses use most recently available ancillary data.
    Expedited: Rapid processing to ensure early availability at the expense of some degradation of data quality; calibration and level 2 analyses use most recently available ancillary data, which may represent conditions several days prior to the CALIPSO measurements.
    Standard: Highest quality data; ancillary data is spatially and temporally matched to the CALIPSO measurements, thus guaranteeing the best possible calibration and most reliable level 2 retrievals.


    NASA
    Last Updated: November 19, 2020
    Curator: Charles R. Trepte
    NASA Official: Charles R. Trepte

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