The Global Space-based Inter-Calibration System (GSICS) was initiated in 2005 by the World Meteorological Organization (WMO) and the Coordination Group for Meteorological Satellites (CGMS). The purpose of GSICS is to provide well-calibrated measurements of space-based observations for weather forecasting and climate monitoring. The NMSC conducts calibration and research to produce accurate measurements of GK2A Advanced Meteorological Imager (AMI) as the GSICS Processing and Research Center (GPRC).

NMSC Activities for GSICS

The NMSC is involved in several activities of GSICS. It has conducted inter-calibration for MI infrared channels, which is based on the GSICS (Global Space-based Inter-Calibration System) Coordinate Center (GCC) Algorithm Theoretical Basis Document (ATBD). The hyperspectral Infrared Atmospheric Sounding Interferometer (IASI) and Cross-track Infrared Sounder (CrIS) on the low Earth orbit satellite are used as reference instruments.

For calibration of visible channels, the NMSC employs vicarious calibration methods using earth targets such as ocean, desert, watercloud (WC), as well as deep convective cloud (DCC) and Geo-Leo inter-calibration methods of ray-matching in the GISC for deep convective cloud.

GK-2A AMI(Advanced Meteorological Imager)

Links to Other GSICS Processing and Research Centers (GPRCs)





Links to

GSICS Coordination Center

GSICS Product Catalogue


Dataserver EUMETSAT

Dataserver NOAA

Dataserver CMA