公开(公告)号：US20150015436A1

公开(公告)日：2015-01-15

申请号：US14388806

申请日：2013-03-28

Applicant: AIRBUS DEFENCE AND SPACE SAS ,  CENTRE NATIONAL D'ETUDES SPATIALES CNES

Inventor： Renaud Broquet ,  Bernard Polle ,  Johan Montel

IPC: G01S19/54 ,  G01S19/55 ,  G01S19/22

CPC classification number: G01S19/55 ,  G01S3/46 ,  G01S3/48 ,  G01S5/0247 ,  G01S5/06 ,  G01S19/22 ,  G01S19/53 ,  G01S19/54

Abstract: A method for calibrating spatial errors induced by phase biases having a detrimental effect on the measurements of phase differences of radio signals received by three unaligned receiving antennas of a vehicle. An inter-satellite angular deviation of a pair of satellites is estimated in two different ways: on the basis of the respective positions of the vehicle and of the satellites to obtain a theoretical inter-satellite angular deviation; and on the basis of the respective directions of incidence of the satellites relative to the vehicle, which are determined from phase measurements, to obtain an estimated inter-satellite angular deviation. The space errors are estimated on the basis of said theoretical and estimated inter-satellite angular deviations. Also, a method and system for estimating the attitude of a vehicle, in particular a spacecraft.

Abstract translation: 校准由相位偏差引起的空间误差的方法，其对由车辆的三个未对准的接收天线接收的无线电信号的相位差的测量具有不利影响。 以两种不同的方式估计一对卫星的卫星间角度偏差：基于车辆和卫星的相应位置以获得理论上的卫星间角度偏差; 并且基于从相位测量确定的卫星相对于车辆的各个入射方向，以获得估计的卫星间角度偏差。 基于所述理论和估计的卫星间角度偏差来估计空间误差。 另外，用于估计车辆，特别是航天器的姿态的方法和系统。

公开(公告)号：US20140368824A1

公开(公告)日：2014-12-18

申请号：US14304240

申请日：2014-06-13

Applicant: ASTRIUM SAS ,  CENTRE NATIONAL D'ETUDES SPATIALES C N E S

Inventor： Frédéric Pasternak

IPC: G01B9/02 ,  G01J3/45

CPC classification number: G01B9/02049 ,  G01B9/02015 ,  G01J3/45 ,  G01J3/4535 ,  G01J3/4537

Abstract: A Fourier-transform interferometer with self-apodization compensation comprises at least one pair of mobile prisms forming a plate with thickness which varies at the same time as an optical path length difference is itself varied. The prisms are displaced using a mobile system with a single degree of freedom, comprising two support elements and at least two rotatably hinged levers. The interferometer is adapted to be installed on board a satellite, for spectral analysis of a radiation originating from the Earth's surface.

Abstract translation: 具有自变迹补偿的傅里叶变换干涉仪包括至少一对可移动棱镜，其形成板，其厚度随着光程长度差自身变化而同时变化。 使用具有单个自由度的移动系统来移动棱镜，包括两个支撑元件和至少两个可旋转铰接的杠杆。 该干涉仪适于安装在卫星上，用于对来自地球表面的辐射进行光谱分析。

公开(公告)号：US20140112302A1

公开(公告)日：2014-04-24

申请号：US14061618

申请日：2013-10-23

Applicant: CENTRE NATIONAL D'ETUDES SPATIALES ,  THALES

Inventor： Pierre BACQUET ,  Charles DAYMAND ,  Mathieu Arnaud

IPC: H04W28/04 ,  H04W72/04

CPC classification number: H04W28/044 ,  H04B7/18523 ,  H04B7/2043 ,  H04B7/2656 ,  H04W72/0406 ,  H04W72/0453 ,  H04W74/085

Abstract: A method is provided of dynamic allocation of shared resources in a communication network, consisting in defining, in a time-frequency plan, a superframe of a given duration ΔT and a given spectral width Δf, made up of one or more frames, each defining a regular time-frequency grid, of which one square, referred to as a time-frequency unit, constitutes the smallest time and frequency interval allocable to a user of said network within said frame, said method consisting in reserving, on each carrier frequency of a frame, at least one block of a number K, greater than or equal to 1, of time-frequency units which can be dynamically allocated to a user for communication or for synchronization.

Abstract translation: 提供了一种在通信网络中动态分配共享资源的方法，其包括在时间 - 频率计划中定义给定持续时间的超帧和Dgr; T给定的频谱宽度＆Dgr; f，由一个或多个 帧，每个定义一个规则的时间频率网格，其中一个平方（称为时间 - 频率单位）构成可分配给所述帧内的所述网络的用户的最小时间和频率间隔，所述方法包括： 帧的每个载波频率，K个大于或等于1个的时间频率单元的至少一个块，其可以动态地分配给用户进行通信或用于同步。

公开(公告)号：US20130106654A1

公开(公告)日：2013-05-02

申请号：US13659691

申请日：2012-10-24

Applicant: THALES ,  CENTRE NATIONAL D'ETUDES SPATIALES (CN

Inventor： Thibaud CALMETTES ,  Lionel RIES ,  Michel MONNERAT

IPC: H04B7/185 ,  G01S19/23

CPC classification number: H01Q3/267 ,  G01S19/23

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 translation: 在有源相位控制天线领域，提供了一种用于校准有源天线的相位中心的方法，该有源天线包括能够接收由卫星发射的有用信号的多个子元件，所述校准被定义为 在每个子元件的电平处的参考信号的接收特性，所述参考信号由相同的卫星在基本上等于有用信号的频带并且其理论接收特性已知的频带上发射。

公开(公告)号：US12044543B2

公开(公告)日：2024-07-23

申请号：US16958687

申请日：2018-12-19

Applicant: CENTRE NATIONAL D'ETUDES SPATIALES

Inventor： François-Xavier Marmet

IPC: G01C21/36 ,  G06F16/29 ,  G06Q30/0241

CPC classification number: G01C21/3691 ,  G06F16/29 ,  G06Q30/0241

Abstract: A user computing device, method and computer program to display a view to the user are provided. The invention allows a user to display a number of different views with photorealistic rendering of how the view should look like at a view time, based solely on view position, and descriptors of the view. In an aspect, the invention deduces from view position and view time the view descriptors (weather parameters, traffic parameters . . . ); selects, in a collection of images, an image of the view based on view position; modifies the image to match descriptors of the view (for example, by adding a rain effect if the image in the collection is under sunshine and the view should be displayed under rain). Thus, the invention allows displaying photorealistic images of how a view should look like at any time.

公开(公告)号：US20240168177A1

公开(公告)日：2024-05-23

申请号：US18512596

申请日：2023-11-17

Applicant: EXAIL ,  CENTRE NATIONAL D'ETUDES SPATIALES ,  CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE ,  UNIVERSITÉ JEAN MONNET SAINT ETIENNE

Inventor： Pierrick CHEINEY ,  Thierry ROBIN ,  Gilles MELIN ,  Nicolas BALCON ,  Julien MEKKI ,  Sylvain GIRARD

IPC: G01T1/02 ,  G01T7/00

CPC classification number: G01T1/026 ,  G01T7/005

Abstract: This relates to a dosimeter including a light source capable of generating a light beam, an optical coupler-splitter, a radio-sensitive optical fiber, a first photodetector arranged to record a power measurement of the light beam transmitted through the radio-sensitive optical fiber, a reference optical arm, a second photodetector arranged to record a reference power measurement of the light beam transmitted through the reference optical arm, and an electronic system configured to extract a differential radiation induced attenuation measurement in the radio-sensitive optical fiber with respect to the reference optical arm. The light beam is non-polarized or depolarized, or, respectively, the light beam is polarized and the radio-sensitive optical fiber is a polarization-maintaining fiber.

公开(公告)号：US11740362B2

公开(公告)日：2023-08-29

申请号：US16771210

申请日：2018-12-11

Applicant: CENTRE NATIONAL D'ETUDES SPATIALES

Inventor： François-Xavier Marmet

IPC: G01S19/21 ,  G01S19/01 ,  G01S19/25

CPC classification number: G01S19/215 ,  G01S19/015 ,  G01S19/254

Abstract: A device and the associated method for detecting spoofing of GNSS signals are provided. The device includes an RF chain to acquire and down convert a signal comprising one or more GNSS signals transmitted by GNSS sources, each of the GNSS signals comprising a navigation message modulated by a spreading code associated to a related GNSS source, an analog to digital converter, to digitize the down converted signal, and a computer logic, to: calculate over a grid of spreading code phase delays and Doppler shifts, cross-correlation functions between the digitized signal and locally generated replicas of the signal, for one or more of the spreading codes, identify cross-correlation peaks, and analyze the cross-correlation peaks to detect spoofing situations.

公开(公告)号：US11505335B2

公开(公告)日：2022-11-22

申请号：US16454882

申请日：2019-06-27

Applicant: Centre National d'Etudes Spatiales ,  SMAC

Inventor： Pierre Lamy ,  Tony Demerville ,  Quentin Bianco ,  Roseline Schmisser ,  Aurelien Hot ,  Elisabeth Laurent

IPC: B64G1/22 ,  B64G1/10

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.

公开(公告)号：US11372074B2

公开(公告)日：2022-06-28

申请号：US16962185

申请日：2019-01-21

Applicant: CENTRE NATIONAL D'ETUDES SPATIALES

Inventor： Nicolas Capet ,  François-Xavier Marmet

IPC: G01S5/00 ,  G01S5/02 ,  G01S5/08 ,  G01S5/10 ,  G01S5/12 ,  G01S5/14 ,  G01S5/16

Abstract: There is disclosed a system for locating an object on a surface waveguide. The surface waveguide is made of one or more 1D wires and/or 2D waveguides comprising conductive elements arranged in patterns. Emitters with known positions can couple with receivers coupled with the surface waveguide. The position of receivers can be determined, for example by multilateration or signal strength indication. Conductive elements can be sprayed or sewed or otherwise deposited onto surfaces such as a ground floor, a sidewalk or a road lane. Described developments comprise the use of absorbers, protective layers, unidirectional emitters, contactless coupling, and various arrangements comprising frequency-selective layers, arrangements in lattices, trellis or anisotropic surfaces. Signal processing aspects and software embodiments are also described.

公开(公告)号：US11304241B2

公开(公告)日：2022-04-12

申请号：US17052183

申请日：2019-05-02

Applicant: THALES ,  CENTRE NATIONAL D'ETUDES SPATIALES ,  INSTITUT SUPERIEUR DE L'AERONAUTIQUE ET DE L'ESPACE ,  INSTITUT NATIONAL POLYTECHNIQUE DE TOULOUSE ,  CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE

Inventor： Selma Zamoum ,  Mathieu Gineste ,  Jérôme Lacan ,  Marie-Laure Boucheret ,  Jean-Baptiste Dupe

IPC: H04B7/185 ,  H04W74/08 ,  H04W84/06

Abstract: A method for transmitting data packets through a random-access (RA) transmission channel shared by a plurality of user terminals uses and exploits a function F for assigning and distributing transmission resources F(u) to the user terminals, knowledge of the graph of which is shared by the sending user terminals and the receiving station in a preliminary step. During the decoding of the received packets, the graph {(u, F(u)} of the assigning and distributing function is exploited by the receiving station to minimize, or even to decrease to zero, the number of replica-location correlations required in case of failure of the conventional CRD-SA protocol decoding process.