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7595749 |
Method and device for relative time and position determination for moving objects based on one-way and two-way measurements
In a method for relative time and position determinations for moving objects of a constellation, signals by the objects are isochronously transmitted, with each object transmitting a unique signal...
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7471212 |
Method and device for guiding a vehicle, as well as a corresponding computer program and a corresponding computer-readable storage medium
A method and a system for guiding a vehicle are provided, which utilize information regarding the vehicle's position. The position of the vehicle is ascertained exactly to the correct lane, and for...
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7471211 |
Celestial object location device
A hand-held electronic celestial object-locating device assists in identifying a celestial object or directing a user to a desired celestial object. The device is useful for locating or identifying...
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7454272 |
Geostationary stationkeeping method
According to one embodiment of the invention, a stationkeeping method for a geostationary satellite includes determining a gravitational force of the sun on the satellite at a beginning of a...
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7443340 |
Method and apparatus for generating and distributing satellite tracking information
A method and apparatus for generating and distributing satellite tracking data to a remote receiver is disclosed. The method for includes extracting from satellite-tracking data initial model...
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7428405 |
Automatic operation system and method for automating satellite control operation and satellite ground control system using the same
Provided are an automatic operation system for automating satellite control operation, a method thereof, and an automatic satellite ground control system using the same. The object of the present...
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7358474 |
System and method for time-delay integration imaging
A system is provided that includes an optical arrangement, an assembly of a plurality of detectors, and a signal processor. The optical arrangement is capable of viewing a scene that includes an...
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7302317 |
System and method to enhance attitude estimation for transfer orbit maneuver
A system and method to enhance attitude estimation for transfer orbit maneuvers of a spinning satellite includes a transfer orbit earth sensor that can receive and convert an infrared radiance to...
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7245214 |
Electronically tracking a path history
Methods and systems for electronically tracking the progress of teams as they cover an assigned geographic area are described herein. A server computer establishes a coverage area, divides the...
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7228231 |
Multiple stayout zones for ground-based bright object exclusion
A vehicle ( 12 ) including a control system ( 18 ) is used for controlling vehicle attitude or angular velocity ( 38 ). The processor ( 24 ) is coupled to a star sensor or tracker ( 22 ) and a...
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7113851 |
Practical orbit raising system and method for geosynchronous satellites
A practical orbit raising method and system wherein a satellite quickly escapes the Van Allen radiation belts and payload mass and mission life are maximized. A satellite is launched that contains...
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7110883 |
Space based augmentation system with hierarchy for determining geographical corrections source
Systems, devices and methods are provided for determining the appropriate or desired geographical correction source for SBAS corrections. One aspect provided herein is a method. According to one...
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7096095 |
Method for the fuel-optimized selection of a thruster configuration
The invention describes a method for the fuel-optimized selection of a configuration of thrusters on a spacecraft while resolving a linear optimization problem with an initialization phase for...
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7076341 |
Autonomous manoeuvring for spinning spacecraft
An inventive autonomous active manoeuvring method and system 1 for spinning spacecraft is provided having a capability to enhance the AOCMS performance of passive spinning satellites and to...
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7069021 |
Method and a system for positioning of an electronic device, and an electronic device
A method is provided for determining the position of an electronic device by receiving a code modulated signal transmitted by satellites, and position information of the satellites and time data,...
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7068180 |
Celestial object location device
A hand-held electronic celestial object-locating device assists in identifying a celestial object or directing a user to a desired celestial object. The device is useful for locating or identifying...
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6999860 |
Low energy method for changing the inclinations of orbiting satellites using weak stability boundaries and a computer process for implementing same
A fuel efficient technique for changing the inclination, with respect to the Earth's equator, for a satellite includes first maneuvering the satellite to the moon on a BCT (Ballistic Capture...
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6957143 |
Monitoring of substitution of high quality position measurements with upgraded low quality position measurements
A method for monitoring of the substitution at least one high quality position measurement with a set of upgraded low quality position measurements comprising the steps of: (A) selecting a high...
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6950060 |
Satellite positioning system
A satellite positioning system and method of maintaining the positioning and clock data of a satellite using as few as one or two monitoring stations is disclosed. Each satellite of the positioning...
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6934609 |
Space-based integrated multi-mission broadband architecture
Spacecraft network and communication method thereof. A spacecraft network includes a first server spacecraft disposed in a first server orbit, a first client spacecraft disposed in a first client...
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6889941 |
Aircraft formation/refueling guidance system
An aircraft formation/refueling guidance system guides a follower aircraft relative to a leader aircraft. A datalink provides a position hold and a bias command from the leader aircraft to the...
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6859769 |
Method and apparatus for creating elements and systems for description of position and motion of bodies in three-dimensional space to support orbital maneuver analysis
The present invention provides a graphical user interface and software architecture that empowers the user to create new vectors, axes, points, coordinate systems, and other elements, and...
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6845950 |
System for high efficiency spacecraft orbit transfer
The present invention relates generally to systems and methods for transferring a spacecraft from a first orbit to a second orbit. In accordance with one embodiment of the invention, the method...
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6813547 |
Method of providing protection against the effects of solar originating protons, so as to make it possible for a star sensor to be reconfigured, and an attitude control system implementing the method
The invention provides a system and method of providing protection against the effects of protons of solar origin, so as to make it possible for a start sensor to be reconfigured. The system...
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6778885 |
Apparatus, method, and system of transferring correction information
Apparatuses, methods, and systems of transferring correction information are described. In certain implementations, correction factors relate to stored or calculated values, and a correspondence...
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6766987 |
Satellite system and method of deploying same
A satellite communication system has a first deployment of a plurality of satellites deployed in a medium earth orbit and two later deployments of a plurality of satellites deployed in the medium...
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6708116 |
Method and apparatus for orbit determination
A method and apparatus for estimating the orbits of spacecraft or other objects relative to primary celestial bodies, given applicable measurements. The present invention uses the variation of...
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6707418 |
Correlating single continuous wave radar space object observation for initial orbit determination
Correlating observations of objects in the sky to determine an orbit includes identifying an initially identified object, determining if the initially identified object will be identifiable again,...
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6691033 |
System and method for calibrating inter-star-tracker misalignments in a stellar inertial attitude determination system
A method and apparatus for determining star tracker misalignments is disclosed. The method comprises the steps of defining a defining a reference frame for the star tracker assembly according to a...
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6683563 |
System for determining precise orbit of satellite and method thereof
In a system for determining a precise orbit of a satellite, a satellite control system includes a tracking, telemetry and command module for receiving telemetry data from the satellite, tracking...
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6681159 |
Spacecraft methods and structures with enhanced attitude control that facilitates gyroscope substitutions
Methods and structures are provided that enhance attitude control during gyroscope substitutions by insuring that a spacecraft's attitude control system does not drive its absolute-attitude sensors...
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6634600 |
Satellite constellation for measuring atmospheric wind speeds using doppler lidar
A constellation of satellites comprising at least two satellites in the same orbit is used to measure atmospheric wind speeds by means of a spatial wind lidar; each satellite carries a Doppler...
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6597989 |
Non-geostationary orbit satellite constellation for continuous coverage of northern latitudes
A non-geostationary low earth orbit satellite constellation using elliptical orbits with apogees in the Northern Hemisphere to provide continuous coverage over the Continental United States of...
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6577929 |
Miniature attitude sensing suite
The present invention provides methods of and apparatus for determining the inertial attitude of an aerospace vehicle. In one embodiment, the invention provides a rotational astronomical...
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6571173 |
Three-dimensional space curve comparison using spatial angle variance metric and applications thereof
Methods for comparing three-dimensional space curves are provided. Such methods are particularly useful for map matching in in-vehicle navigation systems as well as for other applications that...
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6567712 |
Method for determining the co-ordinates of a satellite
The invention relates to the field of radio navigation and, more specifically, it relates to methods of determining the current values of the orbital position of the artificial satellite of the...
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6553286 |
Spacecraft constellation formation keeping using inter-spacecraft distance measurement
A method for controlling a spacecraft comprising the steps of providing a first spacecraft in a known first predetermined orbit, and a second spacecraft in a second predetermined orbit. The...
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6516252 |
Method for acquiring satellite
A method for acquiring a satellite using satellite prediction values has a behavior analysis step for analyzing a behavior unique to a satellite orbit, a search range calculation step for...
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6487476 |
Redundant satellite system
A diversity satellite system using a trailer satellite concept. The main satellite is placed into orbit and the trailer satellite, typically a much smaller satellite, is in orbit with the main...
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6470243 |
Correction of spacecraft steering control law for unexpected orbital inclination effects
A system and method for correcting pointing errors induced by an inclined orbit ( 14 ) for a satellite ( 20 ) that is adapted to be in an orbit having zero inclination ( 12 ). The present invention...
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6453220 |
Low earth orbit satellite constellation stationkeeping algorithm with absolute altitude control
An easily implementable satellite constellation stationkeeping algorithm for maintaining the relative positioning among satellites of a low earth orbit constellation with minimal maneuvering while...
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6442482 |
Procedure for generating operational ballistic capture transfer using a computer implemented process
A method generates an operational ballistic capture transfer for an object emanating substantially at earth or earth orbit to arrive at the moon or moon orbit using a computer implemented process....
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6424913 |
GPS navigational system and associated process for space applications
The invention provides GPS navigational system for a satellite in space which comprises a front end section having an input for receiving GPS signals from a plurality of satellites, a digital...
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6424890 |
Method and apparatus for satellite orbit interpolation using piecewise hermite interpolating polynomials
A method and corresponding apparatus and system for determining the position of a satellite at any instant of time between two sampling instants, based on information in at least one ephemeris...
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6389336 |
Overhead system of inclined eccentric geosynchronous orbiting satellites
A system of inclined geosynchronous satellite orbits has a service area defined on a surface of the earth. The service area has elevation angles greater than a predetermined minimum elevation angle...
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6385512 |
System and method of a ballistic capture transfer to L4, L5
A technique for transferring an object such as a spacecraft to one of the stable Lagrange points, for instance L 4 or L 5 , utilizes a substantially negligible amount of delta-V. In doing so,...
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6381520 |
Sun seeking solar array control system and method
A control system and method that keeps solar arrays on a satellite pointing toward the sun. Exemplary control systems and methods are implemented as follows. An orbit propagator computes satellite...
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6380526 |
Employing booster trajectory in a payload inertial measurement unit
A payload launching method measures the attitude of a booster during a launch with an inertial measurement unit on the payload to compare the actual booster trajectory with a desired trajectory to...
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6366212 |
Celestial object location device
A hand-held electronic celestial object locating device assists in identifying a celestial object or directing a user to a desired celestial object. The device is useful for locating or identifying...
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6356815 |
Stellar attitude-control systems and methods with weighted measurement-noise covariance matrices
Stellar attitude-control systems and methods are provided with enhanced accuracy because they recognize that important star tracker errors exhibit a boresight symmetry and that these errors can be...
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