User Requirements Document (URD):
In the User Requirements Document Version 2.1 (URDv2.1) user requirements are formulated for the satellite-derived data products to be generated within the GHG-CCI project. They are based on inputs from key users who are part of the GHG-CCI Climate Research Group (CRG) and other inputs, most notably peer-reviewed publications. Previous versions are: URDv2, URDv1.
GHG-CCI Phase 2 (2014-2016) documents:
PVIRv5: Product Validation and Intercomparison Report (PVIRv5) for data set "Climate Research Data Package" No.4 (CRDP#4).
PVIRv4: Product Validation and Intercomparison Report (PVIRv4) for data set "Climate Research Data Package" No.3 (CRDP#3).
PVIRv3.2: Product Validation and Intercomparison Report (PVIRv3.2) for data set "Climate Research Data Package" No.2 (CRDP#2).
PSDv3: A key initial activity of Phase 2 is to improve the product format for the GHG-CCI core (=ECA) products (purpose: better product harmonization, meeting CCI data standards, etc.). The new Product Specification Document version 3 (PSDv3) describes the "common parameters" of all GHG-CCI core products for Climate Research Data Package No.2 (CRDP#2) data set released end of March 2015.
URDv2 (see above).
Short TN on planned Sentinel data use.
Technical / project internal documents:
DARDv4.1 (Data Access Requirements Document).
SSDv1 (System Specification Document).
GHG-CCI Phase 1 (2010-2013) documents:
Documents related to the Climate Research Data Package (CRDP#1):
The CRDP is the first version of the ECV GHG data base, i.e., it contains the satellite-derived CO2 and CH4 data products as generated with all algorithms selected during the Round Robin (RR) exercise (see below).
Validation and intercomparison results of the CRDP are reported in the Product Validation and Intercomparison Report (PVIR, v2).
A first user assessment of the CRDP data products is reported in the Climate Assessment Report (CAR), version 1.1.
The algorithms used to generate the CRDP are described in Algorithm Theoretical Baseline Documents (ATBDs). The most recent version (version 2) of GHG-CCI ATBDs is referenced in the products tables of the Climate Research Data Package (CRDP) website.
The Product User Guides (PUGs) advises the user how to use the data. The PUGs include, e.g., detailed file format descriptions. The most recent versions (version 1) of GHG-CCI PUGs is referenced in the products tables of the Climate Research Data Package (CRDP) website.
Round Robin exercise (finished in 2012) documents:
The Algorithm Selection Report (ASR) describes the "Round Robin" algorithm selection results (decision and justification based on the results reported in AIECARv1 and PVASR, see below).
The Algorithm Inter-comparison and Error Characterization & Analysis Report Version 1 (AIECARv1) describes key results obtained in the first two years of the GHG-CCI project with respect to error characterization and inter-comparison of the GHG-CCI satellite-derived data products. The initial version generated after the first year of this project is AIECARv0.
The Product Validation and Algorithm Selection Report (PVASR) describes the validation of the satellite data products as generated after the first two years of the GHG-CCI project ("Round Robin" data set).
Project internal documents:
The Product Validation Plan Version 1 (PVPv1) describes how the GHG-CCI satellite-derived data products will be validated.
The Data Access Requirements Document Version 3 (DARDv3) identifies all the data that needed as input to generate the satellite-derived GHG-CCI data products.
The Product Specification Document Version 2 (PSDv2, PSDv1) describes the GHG-CCI satellite-derived data products. Due to the ongoing development within GHG-CCI, mature data product formats are not necessarily available. For this reason it is expected that the PSD is updated on an annual basis.
The System Requirements Document (version 1) of GHG-CCI lists GHG-CCI system requirements relevant for future phases of the CCI.