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.

