Patents Assigned to Centre National d'Etudes Spatiales
  • Patent number: 10732295
    Abstract: 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.
    Type: Grant
    Filed: July 16, 2015
    Date of Patent: August 4, 2020
    Inventor: Denis Laurichesse
  • Patent number: 10732291
    Abstract: A GNSS receiver, and an associated method are presented for calculating a position from positioning signals transmitted by a plurality of GNSS transmitters. For example the receiver compsises a first and a second signal acquisition elements having different polarizations, the receiver being configured to process the signals received on the first signal acquisition element to calculate first pseudo range measurements, and the signals received on the second signal acquisition element to calculate second pseudo range measurements and associated quality indicators. The receiver further comprises a calculation circuit configured to select at least one of the second pseudo range measurements depending on the quality indicators, and compare it with the corresponding first pseudo range measurement, and select at least three first pseudo range measurements based on the comparison results to calculate a position.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: August 4, 2020
    Inventors: Nicolas Capet, François-Xavier Marmet
  • Patent number: 10684329
    Abstract: A method for estimating the ageing of a battery powering an electrical system. A set of data about the voltage and current across the battery terminals, in response to the current perturbations provoked during the normal operation of the battery by the changes of consumption rate of the electrical system are stored. The impedance of the battery, within a predetermined frequency interval, from the voltage and current data is determined. The age of the battery as a function of the impedance is estimated by comparing the impedance with a previously stored model of evolution of this impedance with ageing.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: June 16, 2020
    Inventors: Laurent Gajewski, Pierre-Louis Taberna, Patrice Simon
  • Patent number: 10656283
    Abstract: The invention discloses an antenna assembly comprising one or more sensors, possibly a fish-eye camera which produces images of the sky above the antenna, said images being processed to identify open sky and occulted sky areas, said identification being used to generate an antenna gain pattern shape wherein null zones are placed on the occulted sky areas, so as to eliminate the GNSS signals which are affected by multipath reflection. The antenna assembly of the invention may be used with any GNSS receiver of the prior art. No specific data on the location of the receiver or its orientation is needed to perform the method of the invention, while in some embodiments, it may be useful to send some information on the number of satellites in view in the open sky.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: May 19, 2020
    Inventors: Nicolas Capet, François-Xavier Marmet
  • Patent number: 10641902
    Abstract: The positioning signals broadcast by GNSS constellations are affected by significant errors, notably due to the crossing of the ionospheric layer or of the tropospheric layer. Several unwieldy means have been deployed to provide professional users with corrections of said errors. These means, however, all require the knowledge of at least one precise reference point at a given distance. According to the invention, positioning receivers that are not very precise, such as smartphones, present in a geographical zone, of unknown precise position, can contribute to the production of precise atmospheric error corrections if said receivers are sufficiently numerous.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: May 5, 2020
    Inventors: Gaël Scot, Denis Laurichesse
  • Patent number: 10605927
    Abstract: The invention discloses a constellation of relay vehicles comprising a receiver of navigation signals and a transmitter of positioning signals to an area of service where a number of rovers manoeuver, wherein the position of the relay vehicle may be adjusted to optimize one or more of an SNR or a DOP index of the positioning signals. In some embodiments, the optimal configuration of the constellation of relay vehicles may be further defined based on priority indexes allocated to the rovers. The invention is applicable to terrestrial or underwater rovers, respectively serviced by aerial or nautical relay vehicles.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: March 31, 2020
    Inventors: François-Xavier Marmet, Nicolas Capet
  • Patent number: 10585195
    Abstract: Receiver and method for receiving one or more RF signals, the RF signals comprising a component relative to a direct propagation path and, depending on a propagation environment, one or more additional components relative to reflected propagation paths, the receiver comprising a calculation circuit configured to: compute at least a first correlation function (310) between the received signal and at least a replica of a RF signal generated at the receiver, and for at least an output of said first correlation function: perform a cepstrum transform (410), search for one or more reflected propagation paths from the output of the cepstrum transform (411), and when reflected propagation paths are detected, determine the associated propagation characteristics (412), and remove the contribution of the detected reflected propagation paths from one of the received signal or the output of the first correlation function.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: March 10, 2020
    Inventors: François-Xavier Marmet, Joël Dantepal
  • Patent number: 10564289
    Abstract: The positioning signals broadcast by the GNSS constellations on civilian frequencies are likely to be counterfeited, while the use of authentic signals is becoming increasingly critical for certain applications. According to the invention, the authentication of GNSS signals is performed by analysis of consistency between the measurements of parameters characteristic of the signals (direction of arrival, amplitude, phase) and their state model, said state model taking account of an emulation by software and electronic means of displacements of the phase centre of the antenna and/or of the main lobe of the radiation pattern. Advantageously, these displacements are generated by a pseudo-random code. Advantageously, the analysis of consistency between measurements and models is a multiple-criterion analysis, the combination of criteria being chosen as a function of a reception quality indicator and/or of a presumed location.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: February 18, 2020
    Inventor: Lionel Ries
  • Publication number: 20200041658
    Abstract: The invention discloses a receiver and a method to process navigation signals from one or more GNSS constellation, wherein an observation model and a measurement model allow a direct calculation of the carrier phase ambiguities. More specifically, in a triple frequency implementation, the receiver calculates in turn the extrawidelane, widelane and narrowlane ambiguities. The code and carrier phase biases can also be directly calculated. Thanks to the invention a quicker acquisition and tracking of a precise position, which will also be less noisy than a prior art solution, especially in some embodiments of the invention using a RAIM and/or a gap-bridging function. Also, code smoothing using the Doppler and low latency clock synchronization allow to decrease the noise levels of the precise point navigation solutions.
    Type: Application
    Filed: June 22, 2016
    Publication date: February 6, 2020
    Inventor: Denis LAURICHESSE
  • Publication number: 20200002028
    Abstract: A damper for an object is placed in a medium subjected to vibrations. The damper has an idle state in the absence of vibrations, a first operating state in case of vibrations of a first type, and a second operating state in case of vibrations of a second type. The level of each vibration of the first type is less than the level of each vibration of the second type. The damper includes an outer support structure, an inner support structure, and at least one pair of membranes formed of a first membrane and a second membrane. Each membrane is formed of a viscoelastic material including fibers aligned substantially in a same direction.
    Type: Application
    Filed: June 27, 2019
    Publication date: January 2, 2020
    Applicants: Centre National d'Etudes Spatiales, SMAC
    Inventors: Pierre LAMY, Tony DEMERVILLE, Quentin BIANCO, Roseline SCHMISSER, Aurelien HOT, Elisabeth LAURENT
  • Publication number: 20200002029
    Abstract: A method for determining, by reanalysis, a vibratory environment of a coupled vehicle/passenger system. A vehicle is subjected to external forces Fext and is coupled to a new passenger including multiple payloads (e.g., x=I, . . . N payload(s)). At the level of vehicle/passenger interfaces Ix, the method comprising a step DET1) for determining, based on reference interfacial acceleration ?x_ref of a reference passenger, the interfacial acceleration ?x? relative to the new passenger.
    Type: Application
    Filed: September 13, 2019
    Publication date: January 2, 2020
    Inventor: Luc-Olivier GONIDOU
  • Publication number: 20190383940
    Abstract: A LIDAR-type device for a remote spectroscopy of a matter includes an optical emission channel that includes a laser source and an optical waves frequency generator to generate a first comb, a second comb, and a local comb. Each comb includes at least one stripe. A transmit telescope emits an emission signal. A reception channel includes a receive telescope that receives a signal reflected by the matter traversed by the emission signal and a detection system that detects a first beat signal of the at least one stripe of the local comb with the corresponding first stripe of the first reflected comb, a second beat signal of the at least one stripe of the local comb with the corresponding second stripe of the second reflected comb, and a third beat signal of the at least one first beat signal with the at least one second beat signal.
    Type: Application
    Filed: June 19, 2019
    Publication date: December 19, 2019
    Inventors: Philippe HEBERT, Francois LEMAITRE, Nicolas CEZARD
  • Patent number: 10466105
    Abstract: Disclosed is a remote spectroscopy device of the LIDAR type including a module for generating an emission signal, an emission module for sending the emission signal toward a targeted material, a receiving module for receiving a response signal and a module for postprocessing of the response signal to determine a composition of the targeted material. The generating module includes at least two laser sources, each laser source being able to generate a laser signal at a predetermined wavelength, an upstream mixer able to mix the laser signals generated by the different laser sources, and a first modulator able to modulate the composite signal at a first modulation frequency to form the emission signal.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: November 5, 2019
    Assignees: CENTRE NATIONAL D'ETUDES SPATIALES, Office National d'Etudes et de Recherches Aérospatiales
    Inventors: Philippe Hébert, François Lemaître, Xavier Orlik, Thibault Dartigalongue
  • Publication number: 20190319327
    Abstract: The present disclosure relates to a multilayer electromagnetic waveguide that includes a plurality of layers forming guide channels for an electromagnetic wave, and at least one transition device including at least one dielectric layer between two guide channels, referred to as coupled guide channels, extending as an extension. Each transition device includes at least one adaptation channel extending in a longitudinal direction, and each adaptation channel is defined by two electrically conductive walls. At least one wall extends along the dielectric spacer layer from one end of the coupled guide channel, over a length suitable for optimizing the transmission of an electromagnetic wave between the two coupled guide channels.
    Type: Application
    Filed: October 16, 2017
    Publication date: October 17, 2019
    Applicant: Centre National d'Etudes Spatiales CNES
    Inventors: Nicolas CAPET, Francesco FOGLIA MANZILLO, Karim TEKKOUK, Ronan SAULEAU, Mauro ETTORRE
  • Patent number: 10382116
    Abstract: The invention relates to a radio communication receiver receiving a radio signal (S) including a main polarisation (MAIN-POL) and a secondary polarisation (X-POL) orthogonal to the main polarisation (MAIN-POL), the receiver including: a unit (1) for receiving the main polarisation (MAIN-POL) and the secondary polarisation of the received signal, synchronised as a carrier frequency with the main polarisation (MAIN-POL); a unit (2) for cancelling out the secondary polarisation synchronised with the main polarisation (MAIN-POL) and configured to suppress, from the received signal (S), the interference due to the secondary polarisation (X-POL), the unit (2) for cancelling out the secondary polarisation including a filtering unit (21) that receives the main polarisation (MAIN-POL) and the secondary polarisation (X-POL) as input; a unit (3) for demodulating the filtered signal, located downstream of the cancellation unit and configured to calculate carrier frequency error information and to communicate same by feed
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: August 13, 2019
    Assignees: Zodiac Data Systems, CENTRE NATIONAL D'ETUDES SPATIALES
    Inventors: Nicolas Pasternak, Alain Thomas, Clément Dudal, Mathieu Llauro, Jean-Pierre Millerioux
  • Publication number: 20190243036
    Abstract: A solid-state thermochromic device and method for producing the device, the device including: a stack successively including, from a rear face to a front face exposed to solar radiation: a) a solid substrate of an inorganic material resistant up to a temperature of 550° C.; b) an infrared-reflective layer of an electronically conductive material; c) electronically insulating interface layers; d) an electronically insulating inorganic dielectric layer transparent to infrared radiation, of cerium oxide CeO2, with a thickness between 400 and 900 nm; e) electronically insulating interface layers; f) a layer of an infrared-active thermochromic material, an n-doped VO2 vanadium oxide, and crystallized in a monoclinic or rutile phase, with a thickness between 30 and 50 nm; and g) a solar-protective coating, transparent to infrared radiation.
    Type: Application
    Filed: July 26, 2017
    Publication date: August 8, 2019
    Inventors: Corinne MARCEL, Frederic SABARY, Xavier VERDALET GUARDIOLA, Stephanie REMAURY
  • Publication number: 20190211422
    Abstract: The present invention relates to novel composite materials enriched with silicon dispersed in matrices comprising Ni, Ti and Si and/or Sn, optionally passivated, the method for producing said materials and to the use of same as electrodes. The invention further relates to the aforementioned matrices and the synthesis thereof.
    Type: Application
    Filed: May 18, 2017
    Publication date: July 11, 2019
    Applicants: Centre National D'Etudes Spatiales, SAFT, Centre National de la recherche scientifique, Université de Montpellier
    Inventors: Christian JORDY, Florent FISCHER, Fermin CUEVAS, Alix LADAM, Laurent ALDON, Pierre-Emmanuel LIPPENS, Nicolas BIBENT, Josette OLIVER-FOURCADE, Jean-Claude JUMAS
  • Patent number: 10336474
    Abstract: The invention relates to a method for deflecting space debris comprising steps of: launching (E2) a thruster (2) by means of a sounding rocket (1) at a target altitude close to that of the one or more debris to be deflected. generating (E3) by the thruster a gas cloud (G) above the sounding rocket.
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: July 2, 2019
    Inventor: Christophe Bonnal
  • Patent number: 10324193
    Abstract: A GNSS receiver comprising a circuit configured to receive a positioning signal comprising a carrier modulated by a subcarrier and a PRN code; a subcarrier and code tracking loop, comprising a first discrimination circuit, configured to calculate a first pseudo range from said received positioning signal and a first reference signal; a code tracking loop, comprising a second discrimination circuit, configured to calculate a second pseudo range from said received positioning signal and a second reference signal; and a calculation circuit configured to evaluate a difference between said first pseudo range and said second pseudo range, and to modify the output of the first discrimination circuit accordingly. The invention further addresses a method for calculating a pseudo-range in such a GNSS receiver.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: June 18, 2019
    Inventors: Nabil Jardak, Willy Vigneau, François-Xavier Marmet, Lionel Ries
  • Patent number: 10317537
    Abstract: 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.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: June 11, 2019
    Inventors: Francois-Xavier Marmet, Lionel Ries, Jacques Beas-Garcia, Gaël Scot, Marion Aubault