Abstract: A device (1) for assisting with physical exertion management, includes a physiological sensor, a positioning device, at least one memory in which data representative of the itinerary to be travelled during the physical exertion can be recorded, and at least one data processing unit organised so as to produce forecast data representative of the change in an physical exertion parameter over the remaining itinerary to be travelled by the individual, to compare these forecast data with predetermined data, and to produce and transmit a message, the content of which depends on the result of the comparison of the forecast data and the predetermined data, with a view to communicating the message to a user.

Abstract: A method includes estimating the position of the moving object on the basis of the reception of navigation signals emitted by a constellation of satellites, the navigation signals being modulated by a code and the receiver comprising a local replica of the code. The determination of the confidence indicator consists in estimating a speed of displacement of the receiver over an identified trajectory segment, deducing therefrom a Doppler delay function corresponding to the motion of the receiver, in correcting the auto-correlation function of the GNSS navigation signal received from each satellite of the constellation by means of the delay function, in comparing the corrected auto-correlation function with a theoretical auto-correlation function by applying a quadratic criterion corresponding to the confidence indicator.

Abstract: A method is provided for demodulating a signal carrying a message transmitted by a terrestrial beacon, executed by a system comprising a constellation of satellites suitable for detecting said signal and for repeating it towards receiving stations on the ground, and an analysis module suitable for receiving signals from said stations. Each receiving station transmits the signals that it receives from the satellite to the analysis module, said module realigning said signals in frequency and/or in time relative to one another, combining the realigned signals to generate a synthetic signal having an enhanced signal-to-noise ratio, and determining the content of said message and/or the modulation parameters of said synthetic signal. The method applies notably to the accurate and reliable location of distress beacons by a satellite system.

Abstract: In the field of active phase-control antennas, a method is provided for calibrating the phase centre of an active antenna comprising a plurality of sub-elements able to receive a useful signal emitted by a satellite, said calibration being defined as a function of the reception characteristics of a reference signal at the level of each sub-element, said reference signal being emitted by the same satellite on a frequency band substantially equal to the frequency band of the useful signal and whose theoretical reception characteristics are known.

Abstract: A method for controlling an attitude control system (30) for a space vehicle (10), the attitude of the space vehicle being controlled during at least one preparation phase followed by an observation phase during which an image capture is performed. In an attitude control system that includes a maneuvering subsystem (300) which includes at least one reaction wheel, the method includes, during the at least one preparation phase, a preparation step (50), during which commands are issued to the maneuvering subsystem in order to control the attitude of the space vehicle, followed by a step (55) of stopping the at least one reaction wheel prior to the observation phase. In addition, during the observation phase, a fine control subsystem (310) having a lower vibration signature than that of the maneuvering subsystem, is sent commands in order to control the space vehicle's attitude. An attitude control system for a space vehicle is also described.

Abstract: Optical devices can comprise a deformable mirror and a system for deforming said mirror. A deformation system comprises a first mechanical structure comprising a first surround, one or more electromechanical actuators attached to the first mechanical structure, a second mechanical structure comprising a substantially planar bottom and a second surround, both deformable, the bottom being attached to the first surround, the second surround being attached to the surround of the mirror, a rigid stud being attached to the bottom, substantially planar and centred on the bottom, the electromechanical actuator or actuators exerting predetermined forces or bending moments on the stud so as to generate a particular distribution of the bending moments on the surround of the mirror, deforming it according to a geometrical form representative or of one or more predetermined geometrical aberrations.

Abstract: The subject of the invention is a satellite comprising at least one central router, a source terminal and a destination terminal. The source terminal comprises means for transmitting, via the central router, IP packets fragmented into at least one level-2 fragment to the destination terminal to which a destination IP address is allocated. The said central router is composed of a satellite and of a ground router. The satellite comprises means for implementing a switching of the IP packets without reassembling the level-2 fragments sent by the source terminal to the destination terminal, the said fragments comprising a reference to the Destination IP address used as basis for the switching. The ground router comprises means for determining IP routing parameters, the said parameters being transmitted by the ground router to the satellite so as to configure the way in which the switching is carried out by the said satellite.

Abstract: The invention is situated in the field of telecommunication satellites. A deployable structure with which such a satellite may be equipped and a method of deploying the deployable structure is provided. The deployable structure includes: a set of primary panels, a set of secondary panels, primary articulation systems, each primary articulation system enabling a primary panel to be caused to pivot relative to another primary panel about a primary axis, the primary axes being substantially parallel to the primary panels, and secondary articulation systems, each secondary articulation system being associated with a secondary panel and enabling said panel to be caused to pivot relative to another panel about a secondary axis parallel to said panels, the deployable structure being configured in such a manner that, in a deployed configuration, the front surfaces of the panels form a substantially continuous overall surface.

Abstract: A device (1) for draining a tank of fluid under pressure pertaining to a space system includes a pyrotechnic actuator that is suitable to perforate a conduit (2) in fluid communication with the tank, the device including a collar (4) that is suitable to enclose the conduit, the collar bearing: a pyrotechnic cartridge (5) for perforation, oriented radially towards the conduit (2), and an anvil (11), diametrically opposed to the cartridge in relation to the conduit, that is suitable to collect debris generated by the perforation.

Abstract: A method for identifying transmitters by a terminal in a single-frequency network comprising a plurality of transmitters. The transmitters are synchronized and transmit with an artificial delay ?i, specific to each transmitter. The method comprises at least one step of acquiring the approximate position of the terminal {circumflex over (p)}, the position pi of a list of transmitters {Tx} in the vicinity of the terminal and the delays ?i associated with them, a step of measuring pseudo-distances ?i between the transmitters and the terminal and a step of associating the measurements ?i with the transmitters of known positions pi by minimizing a cost function, said cost function ?(?i,{circumflex over (p)},?) corresponding to the norm of the error between the measurements ?i and a model of measurements of the pseudo-distances applied to a permutation of the position of the transmitters ?.

Abstract: A stable solution of molecular material includes a first type of organic or organometallic molecule and a second type of organic or organometallic molecule or of ion. The first type has groups allowing electron delocalization. The solution further includes a third type of molecule that may be a surfactant or a solvent, capable of combining with the first or the second type of molecule or of ion), to form an adduct in solution whose presence prevents the precipitation of a compound formed by reaction between the first and second types of molecules, and makes it possible to obtain solutions whose concentration of the compound is greater than that governed by the precipitation constant of the compound in the absence of molecules of the third type.

Abstract: A method for optimizing the acquisition phase of a spread-spectrum signal by a mobile receiver includes searching for the path having the maximum energy for different frequency assumptions and among all the positive trend paths of said frequencies between two initial and final instants marking the beginning and the end of a coherent signal integration.

Abstract: A method of acquiring and repatriating satellite data representative of a zone in space, termed the target zone, and an instrument for acquiring and repatriating satellite data including a plurality of satellites (1, 100), a plurality of terrestrial receiving stations (50, 51, 52, 53, 54), the instrument includes, for each item of data received by a receiving station (50, 51, 52, 53, 54), termed the receiving station, originating from the space layer: elements for determining a receiving station (50, 51, 52, 53, 54) intended for storing this item of data, termed the receiving station competent in respect of this item of data, and a terrestrial digital network for routing this item of data from the station receiving this item of data to the receiving station competent in respect of this item of data.

Abstract: An actuation system for at least two mobile elements with dynamically compensated and opposite relative motions, without disturbance of the elements fixed in the same rigid structure as it, and resistant to exterior loadings, in the case of a translational motion of the mobile elements, includes, in a rigid structure, at least one linear actuator linked to a motion transmission device with four rigid arms, articulated at their ends and forming a lozenge, of which each of two first opposite vertices is linked to a corresponding mobile element, and whose other two opposite vertices have a single translational degree of freedom.

Abstract: A method of acquiring, compressing and transmitting satellite images, characterized in that in a systematic manner: an image is acquired (101); (102) the image is processed by an image preprocessing step providing a value characteristic of the image and an image preprocessed by recognizing predetermined natural objects in the acquired image and replacing the natural objects by standard objects; the characteristic value is compared (103) with a table of values, each value of which is associated with a compression algorithm; the compression algorithm corresponding to the characteristic value is implemented (104) by compression elements for compressing the image; the compressed image is transmitted (105) to a remote image reception device by transmission elements.

Abstract: A device, referred to as a satellite grid, includes a plurality of reception and storage ground stations (5) provided with a storage unit (13), each station (5) including elements for receiving observation data from at least one satellite orbiting around the Earth. Each station (5) is connected to at least one digital network (15) and includes at least one management module so that the different stations cooperate together in order to provide a permanent and transparent shared access to the observation data coming from at least one satellite and stored in the different stations (5), wherein the satellite grid is adapted to be accessible and viewed as a single computer resource from any access point in the network (15).

Abstract: A device includes at least one built-in flexible portion (1) between two stiffer portions (10) that are made of a stiff composite material, the flexible portion (11) being suitable for forming a flexible hinge and made of a flexible material including a reinforcing armature that includes at least one connecting layer (13) common to the material(s) forming each stiff portion (10). The device has end surfaces (20) that oppose each other when extended, the opposing end surfaces being arranged to be suited to serve as a longitudinal compression abutment while enabling the thus-made hinge to fold back at least in a direction away from the extended state.

Abstract: The invention relates to a self-driving and self-locking hinge strap for mounting between two adjacent elements (A1, A2), the strap being of the type constituted by at least one resilient strip (3) preformed to have a section that is curved and designed to be secured via its two ends to the two elements, and to occupy a folded position and a deployed position. According to the invention, each resilient strip (3) is provided with a layer of viscoelastic material (4) interposed between one of the faces of the resilient strip (3) and a stress plate (5) in such a manner as to provide a hinge that also performs a damping function.