公开(公告)号：US12265163B2

公开(公告)日：2025-04-01

申请号：US17357160

申请日：2021-06-24

Applicant: Science Applications International Corporation

Inventor： George Fortney

IPC: G01S19/48 ,  G01S19/47 ,  G01C21/02 ,  G01C21/16 ,  G01S19/21

Abstract: Location may be determined in a way that does not primarily rely on jam-able or spoof-able techniques. For example, an apparatus may have multiple location-determining units, each unit having a different level of trust. One unit may have a first (e.g., highest) level of trust, a second such unit may have a second (e.g., medium) level of trust lower than the first level of trust, and a third such unit may have a third (e.g., lowest) level of trust lower than the first and second levels of trust. The apparatus may generally prefer to determine its location using the highest level of trust unit that is available at any given time.

公开(公告)号：US20250085110A1

公开(公告)日：2025-03-13

申请号：US18708081

申请日：2022-11-09

Applicant: SAFRAN ELECTRONICS & DEFENSE

Inventor： Philippe ELIE

IPC: G01C21/16 ,  G01C21/02

Abstract: A navigation method of a vehicle equipped with a star tracking device, a first inertial measurement device and a satellite positioning device, the star tracking device and the first inertial measurement device being connected to a single support. The method includes controlling movements of the support; simultaneously with these movements, calculating, in a horizontal plane, first positions of the vehicle, and second positions of the vehicle; calculating first deviations between the first positions and the second positions corresponding to each tracking heading and depicting them in a polar reference frame as a function of the corresponding heading and the values of the first deviations; carrying out a circular regression on said first deviations to determine, in this polar reference frame, a first circle; and determining a radius of the circle and a second deviation between a centre of the first circle and an origin of the polar reference frame.

公开(公告)号：US20240425209A1

公开(公告)日：2024-12-26

申请号：US18703621

申请日：2022-10-26

Applicant: JENA-OPTRONIK GMBH

Inventor： Uwe Schmidt

IPC: B64G3/00 ,  G01C21/02

Abstract: A method for determining the position of a satellite rotating about an axis of rotation using at least a star tracker which is aligned along an optical axis with a recorded light object field, the axis of rotation and the optical axis being at a fixed angle relative to one another and a light sensor having a sensor surface which is perpendicular to the optical axis and contains a sensor coordinate system having an arrangement of light-sensitive pixels in rows being provided. To achieve improved position control of the satellite, image data recorded in the individual rows of the light sensor are recorded row by row and sequentially, the image data for each row are convoluted with a predefined number of pixels over a predefined time interval using a boxcar operator, a light maximum is identified using the boxcar operator, the light maximum is assigned to a location of a light object on the basis of a position of the row and within the row in the sensor coordinate system, and an object list containing light object coordinates, the light maximum and a measurement time is identified from a plurality of light objects using an over the entire sensor coordinate system.

公开(公告)号：US12104920B2

公开(公告)日：2024-10-01

申请号：US18478924

申请日：2023-09-29

Applicant: GM Cruise Holdings LLC

Inventor： Roman Sergeev ,  Andrew Robinson ,  Lucio Otavio Marchioro Rech

IPC: G01C21/00 ,  G01C21/02 ,  G01C21/20 ,  G01C21/36 ,  G05D1/00 ,  G06F16/29 ,  G06V20/56

CPC classification number: G01C21/3804 ,  G01C21/02 ,  G01C21/20 ,  G01C21/3602 ,  G01C21/387 ,  G01C21/3889 ,  G05D1/0274 ,  G06F16/29 ,  G06V20/588

Abstract: Systems, methods, and devices are disclosed for synchronizing map updates for a navigating autonomous vehicle. A management service on a managing node can receive an update to a portion of a first map, where a limited visibility map, which is a subset of the first map, can be determined based on a geographical area around an autonomous vehicle navigating a route. The limited visibility map can be synchronized among all the nodes while the autonomous vehicle is using the limited visibility map by the management service delivering, to a plurality of downstream nodes, the update to the limited visibility map when the update does not modify a portion of the limited visibility map, and by bypassing, to the plurality of downstream nodes, the update to the limited visibility map when the update modifies a portion of the limited visibility map.

公开(公告)号：US12104907B2

公开(公告)日：2024-10-01

申请号：US17192978

申请日：2021-03-05

Applicant: US Gov't as represented by Secretary of Air Force

Inventor： Joshua Lentz ,  Kevin Brink

IPC: G01B11/26 ,  G01C21/02 ,  G02B5/10 ,  G02B19/00

CPC classification number: G01C21/025 ,  G02B5/10 ,  G02B19/0019 ,  G02B19/0076

Abstract: A compact celestial tracker includes a platform, a rotation stage that rotatably coupled to the platform to rotate a plane of the platform about a rotation axis and that supports the platform on a substrate, an off-axis parabolic mirror mounted to one side of the platform and having a focal plane directed at an acute angle that is between the rotation axis and the plane of the platform to reflect and focus the beam at a point above another side of the platform, and a detector coupled to the other side of the platform to receive and detect the reflected and focused beam.

公开(公告)号：US20240289968A1

公开(公告)日：2024-08-29

申请号：US18573667

申请日：2022-06-22

Applicant: John Allen Christian ,  Paul Dickson McKee ,  Michael Kudenov ,  Hoang Nguyen

Inventor： John Allen Christian ,  Paul Dickson McKee ,  Michael Kudenov ,  Hoang Nguyen

IPC: G06T7/246 ,  B64G1/36 ,  G01C21/02 ,  G01C21/24

CPC classification number: G06T7/246 ,  G01C21/025 ,  G01C21/24 ,  B64G1/361 ,  G06T2207/10032 ,  G06T2207/30252

Abstract: In an embodiment, there is provided a method for determining a spacecraft instantaneous velocity using starlight. The method includes determining, by a star pairing module, a plurality of star pairs in a selected star field image. The selected star field image includes a plurality of star images. The method includes estimating, by a line of sight estimation module, an apparent bearing direction to each star in at least some of the plurality of star pairs; determining, by the line of sight estimation module, a respective apparent inter-star angle for each star pair of the least some star pairs; and estimating, by a velocity estimation module, a spacecraft velocity to within a total velocity error based, at least in part, on the apparent inter-star angles.

公开(公告)号：US11919663B2

公开(公告)日：2024-03-05

申请号：US17423003

申请日：2020-01-15

Applicant: ARCA DYNAMICS SOCIETA' A RESPONSABILITA' LIMITATA SEMPLIFICATA

Inventor： Emanuele Cidonio ,  Fabio Curti ,  Daniele Luchena ,  Marco Moriani ,  Dario Spiller

IPC: B64G1/24 ,  B64G1/36 ,  G01C21/02

CPC classification number: B64G1/244 ,  B64G1/361 ,  G01C21/025 ,  B64G1/245

Abstract: The invention concerns a method for estimating the angular velocity (and, preferably, also the attitude) of a space platform (for example, a satellite, a space vehicle, or a space station) using only the information provided by one or more optical sensors, such as one or more star trackers, one or more colour and/or black and white cameras or video cameras, one of more infrared sensors, etc.

公开(公告)号：US11808600B2

公开(公告)日：2023-11-07

申请号：US17550471

申请日：2021-12-14

Applicant: GM CRUISE HOLDINGS LLC

Inventor： Roman Sergeev ,  Andrew Robinson ,  Lucio Otavio Marchioro Rech

IPC: G06F16/29 ,  G01C21/00 ,  G01C21/36 ,  G05D1/02 ,  G01C21/02 ,  G06V20/56

CPC classification number: G01C21/3804 ,  G01C21/02 ,  G01C21/3602 ,  G01C21/387 ,  G01C21/3889 ,  G05D1/0274 ,  G06F16/29 ,  G06V20/588

Abstract: Systems, methods, and devices are disclosed for synchronizing map updates for a navigating autonomous vehicle. A management service on a managing node can receive an update to a portion of a first map, where a limited visibility map, which is a subset of the first map, can be determined based on a geographical area around an autonomous vehicle navigating a route. The limited visibility map can be synchronized among all the nodes while the autonomous vehicle is using the limited visibility map by the management service delivering, to a plurality of downstream nodes, the update to the limited visibility map when the update does not modify a portion of the limited visibility map, and by bypassing, to the plurality of downstream nodes, the update to the limited visibility map when the update modifies a portion of the limited visibility map.

公开(公告)号：US20230098784A1

公开(公告)日：2023-03-30

申请号：US18075142

申请日：2022-12-05

Applicant: Optical Physics Company

Inventor： Richard A Hutchin

IPC: G01C21/02 ,  G01V7/16 ,  G01J1/04

Abstract: Aspects of the disclosure are directed to acquiring aligned geographic coordinates of a vertical position. In one aspect, a vertical navigation system includes a light source to generate a source beam; a beam splitter to generate a first and a second source references derived from the source beam; a hollow retroreflector to produce a first and a second vertical references derived from the first and the second source references; an attitude sensor to capture a plurality of reference stars and to measure a first set of angles for the first vertical reference and a second set of angles for the second vertical reference, the first set of angles and the second set of angles are relative to the plurality of reference stars; and a processor to produce the aligned geographical coordinates using the first set of angles, the second set of angles, a gravity vector measurement and a time signal.

公开(公告)号：US20220236062A1

公开(公告)日：2022-07-28

申请号：US17629203

申请日：2020-07-22

Applicant: CUBE EARTH CO., LTD.

Inventor： Masafumi TAKEDA

IPC: G01C21/24 ,  G01C21/02

Abstract: The present invention provides a method for imparting unique identifiers that do not overlap each other to individual position spaces in the case of latitude and longitude information or even in the case of height information also included in addition thereto. A longitude line passing through the coordinate origin is divided by the length of one side of a unit grid, and a latitude value inside unit grids is calculated. An accumulated error is calculated in a case where latitude values inside the unit grids are accumulated for one round in a longitude line direction of a celestial body, and an error per unit grid is calculated based on the calculated accumulated error. The number of unit grids included in one block in the longitude line direction is specified so that a reference error per block is equal to or smaller than one thousandth of the accumulated error, and thus a reference latitude is set. A reference longitude is set by the same calculation process for each latitude line that is determined based on the set reference latitude, reference points are specified sequentially from the coordinate origin based on the set reference latitude and reference longitude, and a unique identifier is imparted to each unit grid located in a block with the reference points set as its vertices.