NIVMER-DEF

An analysis of satellite radar imagery (InSAR) has revealed crustal uplift reaching several millimeters per year in the Kerguelen Islands.
The NIVMER-DEF program involves the study of ground deformation in situ through the installation, maintenance, and data analysis of a permanent GNSS station.
This GNSS infrastructure would address the following objectives:
– Validation and calibration of InSAR measurements;
– Assessment of the physical processes responsible for the observed ground deformation;
– Monitoring of regional crustal deformation.

Additionally, this station would also support the needs of the NIVMER program:
– Monitoring sea level changes.

The NIVMER program aims to develop, monitor, and maintain the co-located tide gauge and GNSS stations of the ROSAME network as part of French SONEL Observing Service (accredited as a National Observation Service by INSU and a member of the Coastal Research Infrastructure – IR ILICO) in the scientific frame of the international Global Sea Level Observing System (GLOSS).
This program also supports national and international research and monitoring programs using in situ observations of sea level variations in the Indian sector of the Southern Ocean.
The NIVMER measurement sites (Crozet, Kerguelen, Saint-Paul, Dumont d’Urville) represent France’s contribution in this part of the ocean to the GLOSS core network.
The GNSS infrastructure of the NIVMER-DEF program will be fully integrated into the NIVMER measurement sites.