French National Center for Space Studies

Toulouse, France

French National Center for Space Studies

Toulouse, France

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Patent
French National Center for Space Studies | Date: 2017-01-11

The invention discloses a receiver of GNSS positioning signals which has embedded computer logic to select between a first operating mode, which uses all available frequencies, and a second operating mode, which uses only part of the available frequencies but in combination with available correction data. The selection is based on a comparison of an index of quality of reception at the receiver and a computed or predicted precision/confidence level of the corrections. A plurality of corrections types are possible, including a type using a local model and a type using collaborative corrections. In some embodiments, a selection and/or a combination of a plurality of local models may be made to optimize the accuracy of the corrections.


Patent
Thales Alenia and French National Center for Space Studies | Date: 2016-10-06

A distributed amplification device with p inputs, p outputs, p amplification paths comprises a redundant reservoir of n amplifiers including n-p back-up amplifiers, an input redundancy ring and an output redundancy ring formed by rotary switches, the input and output redundancy rings sharing the same technology. The internal amplification pathways associated with the n-p back-up amplifiers frame in an interlaced manner the internal amplification pathways associated with the p nominal amplifiers and the amplification paths of the routing configurations each pass through at least five rotary switches. The input and output redundancy rings are topologically and geometrically configured and the family of the routing configurations is chosen such that the electrical lengths of all the paths of one and the same routing configuration of the family are equal.


Patent
French National Center for Space Studies | Date: 2017-01-18

The invention relates to a device (1) for absorbing electromagnetic waves, comprising a plurality of arrays (Ei) each comprising at least one cell (2) for absorbing electromagnetic waves, characterised in that: each array (Ei) has a minimum absorption coefficient valid for given parameters of the waves incident on said array (Ei), said parameters comprising one or more of the following parameters: - a pair of angular ranges ([i-i],[i-i]) of the direction of arrival of the incident waves on the array (Ei), comprising a range ([i-i]) of angles of incidence and a range of azimuthal angles ([i-i]), and - a polarisation of the incident waves, the parameters of the incident waves for which each array (Ei) ensures the minimum absorption coefficient being different from one array (Ei) to the other. The invention also relates to a method for designing and producing an absorbing device.


Patent
French National Center for Space Studies | Date: 2016-11-16

The invention relates to a method for deflecting space debris comprising steps of:


Patent
French National Center for Space Studies | Date: 2017-06-28

The invention discloses a recovery assistance device for helping in rescuing victims of avalanches, earthquakes or boat capsizes. The device is capable of calculating a position from combinations of a previous position and distances to other devices. Different configurations are possible, with a basic configuration consisting of a smart phone having waveform generation capabilities, processing and GNSS receiving capabilities. The device is programmed to be used in a defined mission by an application. The device can also receive a number of add-ons as a battery add-on, a modem add-on, a sound wave generation add-on, antennas, and protection, possibly waterproof, if adequate. Devices of the same type can be carried by people to be rescued and rescuers. The device is therefore quite versatile and can increase significantly the efficiency of rescue teams in different use case scenarios.


This system (30) comprises: - a database (31) comprising maps (Cik), each map being associated with an infrastructure from a plurality of available infrastructures and giving, at each point of a geographical area, a local value of a quantity relating to a quality of experience associated with the execution of an application accessing a remote resource via the infrastructure; a localisation means (20) generating a current position of the mobile terminal (10); a means (40) for selecting a path; a correlation means (50) capable of determining a correlation coefficient, from the current position, the selected path, and each map; and a selection means capable of selecting an infrastructure from the plurality of infrastructures, based on the correlation coefficients.


Patent
French National Center for Space Studies | Date: 2017-05-24

The positioning receiver according to the invention comprises means for storing configuration information and information on its reception conditions, which is processed in order to calculate a current and/or predicted precision of the positioning calculation. Advantageously, at least some of this information is integrated into a variation model of a Kalman filter integrated into the receiver. The invention notably allows a more rapid convergence on a reference precision in a mono-frequency operating mode and transitions between a mono-frequency and bi-frequency mode to be smoothed. Advantageously, the precision information is delivered graphically or in numerical form to the user.


The present invention relates to a method (50) of supervising attitude of a satellite (10) in survival mode in inclined low orbit, the satellite (10) comprising a solar generator (12), a magneto-coupler (15) and an inertial flywheel (16). Said method (50) comprises: - a step (51), prior to the survival mode, of storing a non-zero internal magnetic moment setting which is constant in a satellite frame tied to the satellite (10), termed the survival magnetic moment, and a non-zero internal kinetic moment setting which is constant in said satellite frame, termed the survival kinetic moment, - a step (52) of controlling the magneto-coupler (15) and the inertial flywheel (16) in such a way as to simultaneously form the survival magnetic moment and the survival kinetic moment during part at least of the survival mode.


Patent
Thales Alenia and French National Center for Space Studies | Date: 2017-02-01

A deformable mirror comprises a deformable membrane extending at rest in a first plane and having a reflecting front face and a back face opposite the front face, a supporting structure, an actuator having a first and second end, the first end fixed to the supporting structure, the second end displaced relative to the first end on a first axis substantially at right angles to the first plane to exert, on the back face, an axial load on the first axis, to locally deform the deformable membrane. The mirror comprises a plate that is substantially flat in a second plane substantially parallel to the first plane, positioned between the actuator and deformable membrane, linked to the back face and deformed when the actuator exerts the axial load, and the plate is rigid in the second plane to take up loads applied to the mirror in the second plane.


The present invention relates to an architecture (10) for observing a plurality of objects (18A,..,18N) arranged in geographically separate locations, comprising: - a processing center (14) connected to a global computer network (29), - at least one airliner (15) comprising: + a cabin system (33) comprising a local network (47), + a first external communication module (41), + a second external communication module (42), and + an intermediate communication module (43) connected to the first external communication module (41) via the local network (47) and to the second external communication module (42) via the local network (47), where the intermediate communication module (43) sends digital data comprising observation data between the second external communication module (42) and the first external communication module (41) via the local network (47).

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