Customer: Centre National d’Études Spatiales (CNES)

Programme: SWOT

Supply Chain: CNES > CS Group SPACE

Context

CS Group responsabilities for SWOT Expertise Center are as follows:

• Design, Development, Integration and Maintenance

The features are as follows:

• Integration of new processing versions.
• Replay of failed mission processings
• Calibration/Validation of algorithms

Project implementation

The project objectives are as follows:

• Provision of a Calibration/Validation environment for SWOT algorithms
• Development and provision of interfacing tools for SWOT data access
• Development and provision of replay and test tools for processing
• CHRONOS SWOT processing orchestrator to facilitate the launch of on-demand processing

The processes for carrying out the project are:

• V cycle
• Development in iterations with regular presentations to end users
• Continuous development/integration platform at CNES accessible to end users

Technical characteristics

The solution key points are as follows:

• CE-SWOT specific VRE extended from CNES core
• Access to multiple catalogs using OGC standard API STAC with component EODAG of VRE
• Provision of a Hydro repository and an Oceano repository (time series of SWOT products and ground truths)
• Orchestration and launch of processing identical to the SWOT mission with the CHRONOS orchestrator

The main technologies used in this project are:

Domain	Technology(ies)
Hardware environment(s)	VMware, HPC5G CNES (Pbs)
Operating System(s)	GNU/Linux
Programming language(s)	Python
Interoperability (protocols, format, APIs)	S3, API REST, OGC STAC, JSON, Zarr, CWL
Production software (IDE, DEVOPS etc.)	Gitlab, Jenkins, SonarQube, Artifactory, Docker, Singularity, TimeScaleDB, Docker Compose/Swarm, Ansible, VRE (CNES), CHRONOS (CNES)