Key documents

Document name Version Issue date Download
User Requirements Document (URD) 5.0 Jan. 12, 2024
Product Specification Document (PSD) 6.0 June 17, 2025
Data Access Requirement Document (DARD) 3.2 July 27, 2021
Algorithm Theoretical Basis Document (ATBD) Part 1 - MERIS-MODIS-OLCI L2 Products 5.0 Nov. 28, 2025
Algorithm Theoretical Basis Document (ATBD) Part 2 - IMS L2 Product 3.0 Sept. 7, 2024
Algorithm Theoretical Basis Document (ATBD) Part 3 - Merged CDR-3 and CDR-4 products 5.0 June 27, 2025
End-to-end ECV Uncertainty Budget (E3UB) Part 1 - CDR-1 & CDR-2 5.0 Nov. 28, 2025
End-to-end ECV Uncertainty Budget (E3UB) Part 2 - CDR-3 & CDR-4 6.0 June 26, 2025
System Requirements Document (SRD) 3.0 Aug. 19, 2021
System Specification Document (SSD) 6.1 June 26, 2025
System Verification Report (SVR) 3.0 Aug. 19, 2021
Product Validation and Intercomparison Report (PVIR) Part 1 - CDR-1 & CDR-2 5.0 June 25, 2025
Product Validation and Intercomparison Report (PVIR) Part 2 - CDR-3 & CDR-4 5.0 Dec. 5, 2025
Climate Research Data Package (CRDP) 6.2 June 20, 2025
Product User Guide (PUG) 5.3 June 20, 2025
Climate Assessment Report (CAR) 5.1 Dec. 4, 2025