According to CNES-ISRO agreement:

CNES is responsible for the production, the archiving and the distribution of near-realtime altimetry products (OGDR: Operational Geophysical Data Record) and delayed products (GDR: Geophysical Data Record, IGDR, S-IGDR and S-GDR) to users outside India.

Production of the mission preliminary and precise orbits is realised by CNES, from DORIS system data, completed by the laser system data, for the precise orbit. The operational upkeeping of DORIS components and system is ensured by CNES.

CNES uses EUMETSAT support for the operation of ground stations in Sweden, as well as to produce, archive and distribute near-realtime products to users outside India

CNES supplies the near-realtime data processor to EUMETSAT and ISRO, as well as a support for its integration, test and operation

CNES supplies the processor for delayed products to ISRO, as well as a support for its integration, test and operation

ISRO is responsible for the production, the archiving and the distribution to Indian users of near-realtime and delayed-time altimetry products

ISRO is responsible for the command-control operations of the satellite.

All housekeeping and scientific telemetry as well as auxiliary data are archived by CNES and ISRO
CNES and ISRO are responsible for the product enhanced value and the support to their respective users.

CNES is responsible for the coordination of AltiKa with the other altimetry missions. The enhanced value products of DUACS system (Data Unification and Altimeter Combination System) generated by CNES are archived and distributed under CNES responsibility.

CNES is responsible for the expertise and the long term CalVal.