Abstract: An instrument for of observation images exhibits a high ground resolution and a high frequency of coverage of the Earth. Such an instrument includes a spatial images acquisition layer (1) including satellites (4), a terrestrial images processing layer (3), including images processing devices (5), and a telecommunications layer (2) that is suitable to ensure a transfer of the images from the spatial layer (1) to the terrestrial layer (3), wherein each satellite (4) includes at least one images acquisition device with fixed aim exhibiting a spatial resolution of the order of one metre; each images processing device (5) includes at least one communications line (8) coupling the images processing device (5) and at least one immediately adjacent images processing device, a processing unit that is suitable to process the images received, element for storage of the processed images, and a connection to a digital network.

Abstract: A reciprocating actuator includes at least one element moving reciprocally relative to a rack, a device for driving the moving element in a driving direction, an element for returning the moving element in an opposite direction, at least one sensor for detecting the position of the moving element, and a servocontrol adapted to deliver, for each displacement cycle of the moving element in the driving direction, at least one correction signal (S5) representative of the difference between the energy imparted on the moving element during at least one preceding cycle, and the nominal energy to be imparted on this moving element to displace it exactly to its extreme set-point position, and to adjust on each cycle the control signal of the driving device according to the correction signal (S5).

Abstract: The invention relates to an electromagnetic actuator with variable reluctance comprising a fixed ferromagnetic armature (3) comprising at least two concentric cylinders of revolution linked by a ring nut, at least one magnetizing winding (2) arranged between said cylinders, a ferromagnetic moving armature (4) guided in reciprocating translation movements relative to said fixed armature (3), with which it defines a magnetic circuit with an air gap (20), the dimension of which varies during reciprocating translation movements of the moving armature (4), wherein said fixed armature (3) comprises at least two series of slots, a first series of slots provided radially in said outer cylinder and extending over the entire height of said outer cylinder, and a second series of slots provided radially in said outer and inner cylinders and extending only over a major part of the height of said cylinders.

Abstract: A device for extracting a clock signal from a baseband serial signal, includes an injection-locked oscillator (19), a phase-locked loop (25) including a digital phase detector (26). The oscillator (19) includes a digital input for controlling the value of its natural frequency, and the phase-locked loop (25) includes a counting circuit (30, 35) aggregating the relative values of the digital signal supplied by the digital phase detector (26) and supplying a control signal in digital form for the oscillator (19).

Abstract: Disclosed is a receiver and a method for receiving a radio-electric navigation signal modulated by a carrier at a frequency fp, a sub-carrier at a frequency fsp and a pseudo-random code at a frequency fc, in which the radio-electric signal is converted into a two-way base band I, Q, characterized in that K modified pseudo-random codes, where K=?·fsp/fc, a being a predetermined integer, are generated locally by a modified code generator, each modified code having, during a time duration Tk where Tk=1/?·fsp, the shape of the pseudo-random code without the sub-carrier, and being offset in time by a duration Tk of the preceding modified pseudo-random code; in both ways, the signal is multiplied by the K modified codes and is phase- and quadrature-correlated by two phase and quadrature sub-carriers generated locally.

Abstract: A method and a device for generating a modulated navigation signal which is intended to be used to position a downlink receiver. Four pseudorandom navigation codes of chip rhythms greater than 0.5 MHz are modulated onto a carrier of frequency greater than 500 MHz according to an 8-PSK modulation of constant amplitude with a modulation frequency fM such that: 8fc?fM where fc=Max(fci), and fci designates the chip rhythms.

Abstract: The invention concerns an observation satellite (1) which is intended to be placed in orbit around a celestial body (2), and which comprises a reflecting device (5), a receiving device (6), a linking mechanical system (19), the whole forming a capture system (3) which is suitable to be able to orient the capture system (3) by gravity gradient in an aiming position in which the electromagnetic radiation corresponding to the information to be captured is received. The invention extends to an observation method and a fleet of such satellites (1).

Abstract: A redundant transition device between a waveguide (1) and at least two redundant processing circuits (2, 3) includes two uncoupled coplanar lines (5, 6) formed one on either side of a single substrate plate (4) and extending, in part at least, into the waveguide (1). Each coplanar line (5) has a longitudinal end (17) for connection to one (2) of the processing circuits, and a longitudinal transfer end (16), adapted to channel an electromagnetic wave between the waveguide and the slots (21, 22) of the coplanar line. Each coplanar line (5, 6) is provided with a phase shifting element (25, 26), for inverting the phase of an electric field on one side of the central transmission strip (7, 10) of the coplanar line.

Abstract: A server device for self-service multiple-directing remote production and program broadcasting on a channel of at least a television network (TV1, TV2) includes an apparatus for input connection to at least a first digital data transmission network (2, 3) adapted to authorise the setting up of a communication with at least a particular remote director belonging to a group of suitable and registered remote directors. Automatic sensing and converting devices generate a video signal based on graphic data produced by each connected remote director (OPi), and connectors for telebroadcasting them on the television channel.

Abstract: The invention relates to a transmitter of radio signals (SMS), which are amplitude-modulated according to a discrete plurality of amplitude levels, in which at least one output power transistor (6) receives, on one of its terminals, a bias-voltage level which is adapted to the amplitude level represented by the instantaneous value of a selection signal (SS) generated by analysis means (11) on the basis of the digital control signals (1). The electrical consumption is hence optimized.

Abstract: The invention concerns a method and a device for generating a modulated navigation signal which is intended to be used to position a downlink receiver. Four pseudorandom navigation codes C1, C2, C1?, C2? of chip rhythms greater than 0.5 MHz are modulated onto a carrier of frequency fp greater than 500 MHz according to an 8-PSK modulation of constant amplitude with a modulation frequency fM such that: 8fc?fM where fc=Max(fci), and fci designates the chip rhythms fc1, fc1?, fc2, fc2? of the navigation codes C1, C2, C1?, C2?, each fci value being such that fM=Ni.fci, Ni being an integer greater than or equal to 8, two navigation codes C1, C1? being quadrature modulated at frequency f1=fp?fM/8, and two other navigation codes C2, C2? being quadrature modulated at frequency f2=fp+fM/8, and the modulated navigation signal presenting a constant envelope. Application to radio navigation or radio positioning by satellites.

Abstract: A process and installation for automatic optimal location of a servicing operation on an integrated circuit. The accessible polygons are retrieved on the basis of topographic descriptive data and data representing the electrical circuit. For each step, different execution options are determined, each corresponding to each of the different accessible polygons, and a rating is calculated and assigned to each execution option as a function of the depth of each possible initial polygon with respect to the access surface, and of accessibility parameters of each possible initial polygon, and the optimal execution option to be used for executing each step of the servicing operation is determined automatically by a numerical optimization calculation using the ratings assigned to the different execution options of each step of the servicing operation.

Abstract: The invention relates to a method and an installation for fast location of a fault in an integrated circuit. A sequence of NRZ location vectors is created, the abnormal location vectors are determined, for which the value of the electrical consumption current at rest IDDQ of the circuit is abnormal, at least one set of images is produced with an abnormal location vector, and at least one abnormal vector image is compared with a reference image.

Abstract: A method for producing an input/output permutation of several conductive strips on an integrated circuit consists in: identifying, among the parallel branches of the conductive strips, a minimal group whereof the branches are designed to be subjected to input/output swapping; locating a bend (3) on a deflected branch (2) and carrying out a conductive deposit (5) perpendicular from said bend (3) between the two parallel branches (1, 2), and an inclined deposit (9) between the perpendicular branch (4) and the parallel branch (1) with breaks (7, 8) so as to swap the inputs and the outputs. The invention also concerns the resulting integrated circuit.

Abstract: A method and a circuit for modulating a carrier signal (Se) with a signal (SCj) having at least a modulation cell (CMi) by phase shift for receiving two digital control signals (Scji, SCji2) representing at least part of the digital modulation signal (SCj). For at least a value of the digital modulation signal (SCj), the method consists in applying on at least a common modulation cell (CMi), two digital control signals (SCji1, SCji2) of identical value, the modulation cell (CMi) delivering a signal, called a modulated elementary signal (Ssi), which is null for the digital modulation signal value (SCj).

Abstract: A tool to be fitted onto a machine for traction testing of two elements that are glued to one another at a gluing plane. The tool includes two assemblies, one of which includes a first part that is adjustably movable in a direction orthogonal to a traction axis after the tool is connected to the machine.

Abstract: The invention concerns a free lighter-than-air aerostat comprising a structure (1, 3, 4, 5) symmetrical relative to a main axis (2), at least one main sealed pressurized chamber (16), one or several particle emitting thrusters (8), adapted to drive the aerostat in rotation in one direction about the main axis (2), one or several moving flaps (9) adapted to be set either in an active state wherein they brake the aerostat rotation, or in an inoperative state wherein they offer no substantial resistance to the aerostat rotation, and on-board control means (19) adapted to control the thrusters (8) and the flaps (9) to drive the aerostat in permanent rotation about the main axis (2), and in translation perpendicular to the main axis (2).

Abstract: A pump with positive displacement for pumping and entrainment of a fluid in piping (3), includes a cylinder (6) which contains deformable pumping bellows (12) which separate two pumping chambers, a driver (34, 29) which is associated with the pumping unit (12) and has an actuator unit (29) inside the cylinder (6) which is connected to the pumping unit (12), and coils (34) for transmission of drive energy to the actuator (29) from outside the cylinder (6), and a manifold (2) with vortex fluid diodes, which is designed to control the global direction of pumping and flow of the fluid in the piping (3).

Abstract: The invention concerns a device for micrometric positioning with respect to a frame (1) of an optical support (2) element (3) integrated in a space system, comprising three turrets (4, 5, 6) integral with the frame (1) and, for each turret first means (9 to 12) for adjustment along a first direction, second means (20 to 22) for adjustment along a second direction, third means (30 to 35) for micrometric adjustment along a third direction, and means for locking the support (2) in adjusted position with respect to the frame (1) comprising at least a lock screw and a shim.

Abstract: The invention concerns a modulating electronic circuit with m phase status m.gtoreq.2 comprising a distribution line (6) with n similar dephasing cells (Ci) n.gtoreq.2, each comprising a transistor supplying on a derivative output (ODi) an out-of-phase signal (SDi); a secondary switching/modulating stage (4) controlled on the basis of a control signal; means for summing in phase the signals derived the switching/modulating stage (4).