CALIPSO Quality Statements
Most Recent Product Releases:
December 2007 (Level 1B)
January 25, 2008 (Level 2)
|
CALIPSO Quality StatementsMost Recent Product Releases: |
|
The second release (Release 2) of the CALIPSO data comprises Level 1 and 2 data from the CALIOP and IIR instruments. Release 2 includes initial releases for the Level 2 CALIOP Cloud Profile and Aerosol Profile products and IIR Swath products. The initial release (Release 1) of CALIPSO data comprised Level 1 data from all three instruments (CALIOP, IIR, and WFC) and a limited set of CALIOP Level 2 Cloud and Aerosol Layer products. Validation to date is very limited, and the majority of the data products should not be considered to be validated. Release 2 is considered to be a provisional release for the Level 1 data products, in the sense that while all obvious errors have been identified and corrected, thus far only a limited set of intercomparisons have been performed. Various parameters are more or less reliable (explained in some detail in the data quality summaries), but the responsibility is on the user to determine if the data quality is sufficient for his/her purposes.
The Cloud and Aerosol Profile Products are released as Beta products. The primary contents are profiles of cloud and aerosol extinction and backscatter profiles at a horizontal resolution of 5 km (cloud profiles) and 40 km (aerosol profiles). The products contain known errors and invalid data and, in their current form, are not standalone products. The current products contain no data quality information and must be used in conjunction with the Cloud and Aerosol Layer Product and/or Vertical Feature Mask, which contain data quality parameters and confidence flags. Data assessment and screening procedures have not yet been developed. Because of this, the data products are considered to be not appropriate for scientific publication, but are released to users for evaluation and to provide feedback to the CALIOP algorithm development team. Users should carefully read the section of the Data Quality Summaries related to extinction retrievals. QA and validation are ongoing and data quality information will be included with future releases.
Uncertainties for specific parameters are reported in the individual quality statements. 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.
| 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. |
CALIPSO Products are divided into nine groups:
| A Data Quality Statement for each CALIPSO Product is listed in the Product Specific Quality Statements. Also listed in Product Specific Quality Statements are links to more detailed Data Quality Statements for current and past versions of the CALIPSO products. Please be aware that products generated in the past by older software versions may be of different quality than current products. It is important, therefore, to note that dates on quality statements correspond to the date when the CALIPSO product was released, not to the date when the raw data was acquired by the CALIPSO instrument. |
| IIR Level 1B Radiances Half orbit (Night and Day) geolocated, calibrated radiances |
|||||
|---|---|---|---|---|---|
| Release Date | Version | Data Date Range | Product Quality Statement |
Data Detail Quality Statement |
Maturity Level |
| December 8, 2006 | 1.10 | June 13, 2006 to present | Summary | In Preparation | |
| Lidar Level 1B Profiles Half orbit (Night and Day) geolocated, calibrated Lidar Profiles and Viewing Geometry Products |
|||||
|---|---|---|---|---|---|
| Release Date | Version | Data Date Range | Product Quality Statement |
Data Detail Quality Statement |
Maturity Level |
| December 2007 | 2.01 | June 13, 2006 to present | Summary | QS 2.01 | Provisional |
| August 12, 2007 | 1.22 | August 12, 2007 to November 11, 2007 | Summary | QS 1.22 | Provisional |
| March 1, 2007 | 1.20 | March 1, 2007 to August 11, 2007 | Summary | QS 1.20 | Provisional |
| January 6, 2007 | 1.11 | January 6, 2007 to February 28, 2007 | Summary | QS 1.11 | Provisional |
| December 8, 2006 | 1.10 | June 6, 2006 to January 5, 2007 | Summary | QS 1.11 | Provisional |
| Lidar Level 2 Vertical Feature Mask Half orbit (Night and Day) scene classification data and lidar lighting and land/water indicators |
|||||
|---|---|---|---|---|---|
| Release Date | Version | Data Date Range | Product Quality Statement |
Data Detail Quality Statement |
Maturity Level |
| January 2008 | 2.01 | June 13, 2006 to present | Summary | QS 2.01 | Provisional |
| December 8, 2006 | 1.10 | June 13, 2006 to November 11, 2007 | Summary | QS 1.10 | Layer Heights - Provisional Aerosol/Cloud/Stratospheric Classifications - Beta |
| Lidar Level 2 Cloud and Aerosol Layer Information Half orbit (Night and Day) lidar cloud and aerosol layer products describe both column and layer properties |
|||||
|---|---|---|---|---|---|
| Release Date | Version | Data Date Range | Product Quality Statement |
Data Detail Quality Statement |
Maturity Level |
| January 2008 | 2.01 | June 13, 2006 to present | Summary | QS 2.01 | Provisional |
| December 8, 2006 | 1.10 | June 13, 2006 to November 11, 2007 | Summary | QS 1.10 | Layer Heights - Provisional Aerosol/Cloud/Stratospheric Classifications - Beta |
| Lidar Level 2 Aerosol Profile Half orbit (Night and Day) averaged aerosol profile data and ancillary data |
|||||
|---|---|---|---|---|---|
| Release Date | Version | Data Date Range | Product Quality Statement |
Data Detail Quality Statement |
Maturity Level |
| January 2008 | 2.01 | June 13, 2006 to present | Summary | QS 2.01 | Beta |
| Lidar Level 2 Cloud Profile Half orbit (Night and Day) averaged cloud profile data and ancillary data |
|||||
|---|---|---|---|---|---|
| Release Date | Version | Data Date Range | Product Quality Statement |
Data Detail Quality Statement |
Maturity Level |
| January 2008 | 2.01 | June 13, 2006 to present | Summary | QS 2.01 | Beta |
| Wide Field Camera (WFC) Level 1B Scans Information Half orbit (Day) geolocated data radiances |
|||||
|---|---|---|---|---|---|
| Release Date | Version | Data Date Range | Product Quality Statement |
Data Detail Quality Statement |
Maturity Level |
| December 8, 2006 | 1.10 | June 13, 2006 to present | Summary | QS 1.10 | Provisional |
No page revision notes to report.
Page Updated: January 14, 2008
