Documents (see below) are either related to all products (e.g., User Requirements Document (URD)) or are related to specific data sets called "Climate Research Data Packages" (CRDP).

The latest (and second) GHG-CCI+ CRDP is CRDP6 and consists of the following products:

  • CO2_OC2_FOCA (v09): XCO2 from OCO-2 retrieved with the FOCAL algorithm. The product is global and covers the period Jan 2015 - May 2017.
  • CH4_S5P_WFMD (v1.2): XCH4 from S5P/TROPOMI retrieved with the WFMD algorithm. The product is global and covers the period Nov 2017 - Apr 2020.
  • CO2_TAN_OCFP (v1.0): XCO2 from TanSat retrieved with the OCFP (or UoL-FP) algorithm. This initial product is (currently) limited to retrievals over land covers the two months June and August 2017.
  • CO2_GO2_SRFP (v1.0.0): XCO2 from GOSAT-2 retrieved with the SRON SRFP (or RemoTeC Full Physics (FP)) algorithm. The product is global and covers the period Feb 2019 - Oct 2019.
  • CH4_GO2_SRFP (v1.0.0): XCH4 from GOSAT-2 retrieved with the SRON SRFP (or RemoTeC Full Physics (FP)) algorithm. The product is global and covers the period Feb 2019 - Oct 2019.
  • CH4_GO2_SRPR (v1.0.0): XCH4 from GOSAT-2 retrieved with the SRON SRPR (or RemoTeC Proxy (PR)) algorithm. The product is global and covers the period Feb 2019 - Oct 2019.

The first GHG-CCI+ CRDP (available since March 2020) is CRDP5 and consists of the following products:

  • CO2_OC2_FOCA (v08): XCO2 from OCO-2 retrieved with the FOCAL algorithm. The product is global and covers the period 2015 - 2017.
  • CH4_S5P_WFMD (v1.2): XCH4 from S5P/TROPOMI retrieved with the WFMD algorithm. The product is global and covers the period Nov-2017 - 2018.
  • CO2_TAN_OCFP (v1.0): XCO2 from TanSat retrieved with the OCFP (or UoL-FP) algorithm. This initial product is (currently) limited to TCCON sites and covers the period 2017 - 2018.

Note that all GHG-CCI pre-cursor project data products (CRDP1-CRDP4) are now generated operationally via C3S and latest versions of these products are available via the Copernicus Climate Data Store (CDS).

An overview of all products (CCI and C3S) and related documents is also provided HERE.

Key documents

Document name Version Issue date Download
CRDP6: Algorithm Theoretical Basis Document (ATBD) - CO2_OC2_FOCA 2.0 Aug. 24, 2020
CRDP6: Algorithm Theoretical Basis Document (ATBD) - CH4_S5P_WFMD 1.0 Aug. 20, 2019
CRDP6: Algorithm Theoretical Basis Document (ATBD) - CO2_TAN_OCFP 1.0 Aug. 22, 2019
CRDP6: Algorithm Theoretical Basis Document (ATBD) - CO2_GO2_SRFP & CH4_GO2_SRFP 1.2 Dec. 3, 2020
CRDP6: Algorithm Theoretical Basis Document (ATBD) - CH4_GO2_SRPR 1.2 Dec. 3, 2020
CRDP6: Product User Guide (PUG) - CO2_OC2_FOCA 3.0 Jan. 26, 2021
CRDP6: Product User Guide (PUG) - CH4_S5P_WFMD 3.0 Jan. 8, 2021
CRDP6: Product User Guide (PUG) - CO2_TAN_OCFP 2.0 Feb. 10, 2021
CRDP6: Product User Guide (PUG) - CO2_GO2_SRFP & CH4_GO2_SRFP 1.1 Feb. 4, 2021
CRDP6: Product User Guide (PUG) - CH4_GO2_SRPR 1.2 Dec. 3, 2020
CRDP6: End-to-End ECV Uncertainty Budget (E3UB) – CO2_OC2_FOCA 2.0 Jan. 26, 2021
CRDP6: End-to-End ECV Uncertainty Budget (E3UB) – CH4_S5P_WFMD 4.0 Jan. 8, 2021
CRDP6: End-to-End ECV Uncertainty Budget (E3UB) – CO2_TAN_OCFP 2.0 Feb. 10, 2021
CRDP6: End-to-End ECV Uncertainty Budget (E3UB) – CO2_GO2_SRFP 1.1 Feb. 4, 2021
CRDP6: End-to-End ECV Uncertainty Budget (E3UB) – CH4_GO2_SRFP 1.1 Feb. 4, 2021
CRDP6: End-to-End ECV Uncertainty Budget (E3UB) – CH4_GO2_SRPR 1.1 Feb. 4, 2021
CRDP6: Product Validation and Intercomparison Report (PVIR) 2.1 March 19, 2021
CRDP6: Climate Assessment Report (CAR) 2.0 March 9, 2021
Document name Version Issue date Download
User Requirements Document (URD) 3.0 Feb. 17, 2020
Product Specification Document (PSD) 3 June 6, 2014
CRDP5: Algorithm Theoretical Basis Document (ATBD) - CO2_OC2_FOCA 1.0 Aug. 23, 2019
CRDP5: Algorithm Theoretical Basis Document (ATBD) - CH4_S5P_WFMD 1.0 Aug. 20, 2019
CRDP5: Algorithm Theoretical Basis Document (ATBD) – CO2_TAN_OCFP 1.0 Aug. 22, 2019
CRDP5: Product User Guide (PUG) - CO2_OC2_FOCA 1.0 Nov. 29, 2019
CRDP5: Product User Guide (PUG) - CH4_S5P_WFMD 1.0 Oct. 23, 2019
CRDP5: Product User Guide (PUG) - CO2_TAN_OCFP 1.0 Dec. 20, 2019
CRDP5: End-to-End ECV Uncertainty Budget (E3UB) – CO2_OC2_FOCA 1.0 Jan. 6, 2020
CRDP5: End-to-End ECV Uncertainty Budget (E3UB) – CH4_S5P_WFMD 2.0 Dec. 19, 2019
CRDP5: End-to-end ECV Uncertainty Budget (E3UB) - CO2_TAN_OCFP 1.0 Dec. 20, 2019
CRDP5: Product Validation and Intercomparison Report (PVIR) 1.1 March 13, 2020
CRDP5: Climate Assessment Report (CAR) 1.2 March 20, 2020