Abstract:
A method for observing a region of the Earth's surface, called region of interest, implementing a plurality of satellites spaced apart along at least one non-stationary orbit, the method comprises: the acquisition, by at least two of the satellites, during a same passage over the region of interest and in successive acquisition periods, of a plurality of images of the Earth's surface, called partial images, each covering a portion of the region of interest; and the obtaining of an image covering all of the region of interest by the merging of at least two partial images, exhibiting a predefined time shift between their acquisition periods, for each of the at least two satellites. A satellite system for observing a region of the Earth's surface for the implementation of such a method, and ground segment belonging to such a system is provided.
Abstract:
A relay platform for communicating telemetry data from one or more moving observation satellite(s) to the ground is provided. The relay platform for communicating from a space observation system, installed on board an aircraft moving above the clouds, comprises a first reception interface for demodulating telemetry data from at least one moving observation satellite, a second transmission interface for modulating and transmitting the data received to at least one destination ground station. The relay platform comprises a first descending two-level decryption/encryption chain for the telemetry data returned from at least one moving observation satellite(s) to the destination ground station(s).
Abstract:
A space system comprises two main satellites each describing a distinct elliptical orbit around the Earth, each of the two orbits being such that the space system makes it possible to provide a permanent or continuous service over at most a terrestrial zone comprising a polar cap and a region of different latitude over an interval of longitudes.