ESA and EUMETSAT have initiated joint preparatory activities for the formulation and definition of
the Meteosat Third Generation (MTG) geostationary system to ensure the future continuity, and
enhancement, of the current Meteosat Second Generation (MSG) system. The MTG programmatics are
being established to ensure a seamless transition between the conclusion of the successful MSG
operational system and the start of the new MTG operational system, with particular emphasis on
continuity of the imagery missions.
The MTG phase A studies were successfully concluded in December 2008 an re-consolidation phase
B1 activities continued from January to July 2009. They were devoted to the MTG concept definition
and requirements consolidation for meeting the User needs in the field of Nowcasting and Very Short
Term Weather Forecasting (NWC), Medium/Short Range global and regional Numerical Weather
Prediction (NWP), Climate, Air Quality and Composition Monitoring. The following missions have
been analysed, measurement techniques studied and preliminary concepts established:
- High Resolution Fast Imagery Mission (improved successor to MSG SEVIRI HRV mission)
- Full Disk High Spectral Resolution Imagery Mission (improved successor to SEVIRI)
- Lightning Imagery Mission
- IR Sounding Mission
- UV-VIS-NIR Sounding Mission
Both space segment architecture and preliminary satellite and instrument concepts were investigated in
the course of these studies, and a dual satellite configuration established comprising the Imaging
satellite (MTG-I) and the sounding satellite (MTG-S). The study covered all elements to a level of
detail allowing to establish a technical baseline, conclude on the feasibility of the system requirements
and undertake preliminary programmatic evaluation.
Riders to the Phase A studies (Phase B1 work) have been placed to further consolidate the satellite and
payload definition and development, prior to the release of the Invitation To Tender (ITT) for the full
space segment implementation in July 2009.
This paper provides an overview of the conclusions of those MTG space segment studies. It
summarises the conclusions reached for the satellites, and associated instruments relating to Imaging,
IR Sounding and Lightning missions, with respect to achievable performances, including Radiometry
and Image Navigation and Registration aspects.