CO2M logos

Scientific support for CO2M Level-1 processing requirements

CO2M logos
CO2M logos

This service provides support to EUMETSAT for the definition of Level-0 to 1 processing requirements for the future Copernicus CO2 Monitoring (CO2M) mission.

Last Updated

08 April 2021

Published on

07 September 2020

The CO2M mission is the space component of the European integrated observation and inversion modelling system dedicated to the monitoring of anthropogenic CO2 emissions.

This Monitoring and Verification System of systems (MVS) is proposed as a future Copernicus programme component by the European Commission and will be implemented jointly by ESA, EUMETSAT and ECMWF.

 Instrument details and simulated outputs
Figure 1: Instrument details and simulated outputs

The European integrated system has the following objectives:

  1. Atmospheric CO2 measurements obtained from dedicated space-borne sensors, complemented by in-situ networks and ancillary observations.
  2. The operational provision of bottom-up anthropogenic CO2 emissions, with high spatial and temporal resolution and short time updates.
  3. An operational data-assimilation system, which will integrate atmospheric measurements with bottom-up information into consistent and accurate estimates of anthropogenic CO2 emissions and their trends.
  4. A decision support tool.

The CO2M mission will contribute to the European MVS, for which EUMETSAT and its partners will provide the Payload Data Ground Segment (PDGS) and its operational products, under Objective 1.


Objectives

The objective of this study it to support the definition of Level-0 to 1 processing requirements for the CO2M mission. To achieve this objective, tasks in the following categories will be executed:

Activity 1: Data processing steps, inverse processing methods and error propagation.
Activity 2: Scientific algorithm data flows and functional requirements.
Activity 3: Preparation of test-data and evaluation of processing performance.


Overview

The above activities will support wider EUMETSAT work on the requirements definition for a CO2M operational level-1 processor and its processing and product monitoring, as part of the PDGS (see Figure 2).

 Schematic of the proposed CO2M ground-segment processing tasks for processing level-1 and 2 products, together with geo-location and scene information, as well as ancillary input and output data.
Figure 2: Schematic of the proposed CO2M ground-segment processing tasks for processing level-1 and 2 products, together with geo-location and scene information, as well as ancillary input and output data.
 

The scientific service will:

  • evaluate existing instrument functional models, existing algorithms and inverse methods based on GOME/SCIAMACHY/OMI/S5p and S5 experience (being a similar class of instruments) and will make use of the technical specifications for CO2M where already available;
  • make proposals for efficient inverse methods and error propagation for the efficient application of instrument key-data and the use of in-orbit calibration, as well as routine solar and lunar measurement data;
  • make proposals for a robust implementation of the processing of different instrument observation modes (dark side eclipse, sun-glint and nominal nadir mode), as well as consider the potential use of multi-platform data;
  • run dedicated performance tests on specific sub-functions of the full level-1 processing chain using pre-existing or tailored sets of level-0 test-data (provided by EUMETSAT, ESA or through other studies and services) and provide an evaluation of the results along with the produced test-data sets;
  • evaluate the available technical notes and specifications from the corresponding ESA CO2M satellite platform and instrument industrial studies as available, as well as the existing Sentinel-5 operational processor and instrument data simulator (IDS) specifications.

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