GMES Sentinel Complimentary Study

OHB-System is examining the user requirements for the European earth observation program GMES (Global Monitoring for Environment and Security) and, on this basis, designing next-generation satellite missions which are beyond the capabilities of current and planned systems (Sentinel-1...5).

One important application in this connection is support in recording natural and man-made catastrophes by means of high-resolution earth observation. For this purpose, data with a resolution of less than one meter is necessary within 24 hours or on a daily basis. This requires satellite constellations which are able to cover the surface of the earth, record images and send the data to the ground quickly enough. Users are interested in receiving both optical data (visible spectrum) for simple interpretation as well as radar data on account of the guaranteed availability (i.e. no impairment as a result of clouds or the lack of sunlight). For this purpose, OHB-System has developed the underlying models and the design for radar and optical earth observation satellite constellations (2-3 satellites each), all of which can be implemented immediately using technology which is currently available. In addition to catastrophe management, these systems are also required for security purposes as well as for humanitarian aid, particularly European missions. 

To supplement the Sentinel-3 mission, OHB-System has developed a satellite system which collects data on the condition of coastal waters on an hourly basis. By comparison, Sentinel-3 can only do this once every 2 or 4 days. The new system will enable close to real-time observation of the development of and movements in algae slick, phytoplancton and sediments. This is of relevance for fishing, coastal protection and other maritime applications. To this end, an instrument with up to 14 channels in the optical and near infrared spectrum is to be fitted to a small geostationary satellite (SGEO). From its geostationary orbit, it will provide more or less continuous observation capabilities.

Further applications such as immediate data transmissions from the earth observation satellite to the ground via geostationary relay satellites, the observation and measurement of atmospheric gases or the measurement of sea levels and wave heights are other areas which OHB-System is exploring for future GMES missions.