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7561968 |
Scale factor calibration and compensation for angular position resolver
In accordance with an embodiment of the present invention, a resolver system has at least one resolver and at least one amplifier in electrical communication with each resolver. A reference circuit...
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RE40801 |
GPS airborne target geolocating method
A geolocation method is applied for accurate targeting of a target using an airborne beacon as a pseudo star generated by a high altitude vehicle, and using optical sensors by a low altitude...
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7542849 |
Network aided terrestrial triangulation using stars (NATTS)
A method for determining a terrestrial location of an apparatus that is deployed in a generally known geographical region includes capturing, by the apparatus, an earthbound image of the sky from a...
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7518792 |
Method of determining orientation of a telescope
An automatic telescope ( 10 ) capable of determining an orientation without requiring input from a user or any external source. The telescope ( 10 ) preferably includes a database ( 22 ) to store...
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7494090 |
Multiple kill vehicle (MKV) interceptor with autonomous kill vehicles
The present invention provides a MKV interceptor including multiple kill vehicles with autonomous management capability and kinematic reach to prosecute a large threat extent. Each KV can...
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7494089 |
Multiple kill vehicle (MKV) interceptor and method for intercepting exo and endo-atmospheric targets
By sharing tasks between the CV and the KVs, the MKV interceptor provides a cost-effective missile defense system capable of intercepting and killing multiple targets. The placement of the...
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7471952 |
Data terminal device
A position data receiving part receives position data transmitted from an artificial satellite. A wireless unit transmits and receives data with respect to a base station. A detailed map data...
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7451022 |
Calibration of ship attitude reference
A ship includes a star tracker mounted on a platform stabilized in ENU by the inertial navigation system (INS). The line-of-sight (LOS) of the star tracker is directed toward two separated stars,...
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7447591 |
Daytime stellar imager for attitude determination
An automatic celestial navigation system for navigating both night and day by observation of K-band or H-band infrared light from multiple stars. One or more telescopes mounted on a movable...
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7437222 |
Gimbal disturbance calibration and compenstion
Various embodiments of the present invention are directed to precision control system for spacecraft gimbaled payloads. Embodiments of the invention provide an innovative technique of calibrating...
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7411167 |
Tracking a moving object from a camera on a moving platform
A method to dynamically stabilize a target image formed on an image plane of an imaging device located in a moving vehicle. The method includes setting an origin in the image plane of the imaging...
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7349803 |
Daytime stellar imager
An automatic celestial navigation system for navigating both night and day by observation of K-band or H-band infrared light from multiple stars. A preferred embodiment uses three telescopes with...
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7310578 |
Fast access, low memory, pair catalog
A system ( 18 ) includes: a) A vehicle ( 12 ) includes an attitude or angular velocity control system ( 38 ), a plurality of star trackers or star sensors ( 22 ) each having a field of view ( 28 );...
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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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7219014 |
Method and apparatus for real-time star exclusion from a database
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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7216036 |
Integrated inertial stellar attitude sensor
An integrated inertial stellar attitude sensor for an aerospace vehicle includes a star camera system, a gyroscope system, a controller system for synchronously integrating an output of said star...
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7142981 |
Laser range finder closed-loop pointing technology of relative navigation, attitude determination, pointing and tracking for spacecraft rendezvous
A closed-loop LRF pointing technology to measure the range of a target satellite from a chaser satellite for rendezvous is provided that includes: LOS angle measurements of the target, a relative...
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7140574 |
Inertial position target measuring systems and methods
Systems and methods for contiguously and accurately updating target object information during an entire target engagement period are provided. The target tracking system includes a database for...
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7136752 |
Method and apparatus for on-board autonomous pair catalog generation
A system ( 18 ) includes: a) A vehicle ( 12 ) includes an attitude or angular velocity control system ( 38 ), a plurality of star trackers or star sensors ( 22 ) each having a field of view ( 28 );...
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7136750 |
Obstacle detection apparatus and method for automotive vehicle
In obstacle detection apparatus and method for an automotive vehicle, a first importance as obstacle representing a possibility that a selected object becomes an obstacle for the vehicle is...
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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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7079944 |
System and method for determining orientation based on solar positioning
Determination of the orientation of a unit is based on solar positioning. An actual measurement of the position of the sun is taken and compared to a theoretical determination of the position of...
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7062363 |
Refinement of spacecraft angular velocity and attitude estimates using star data
A method and apparatus for refining a spacecraft state estimate, such as an attitude estimate or an angular velocity estimate, is disclosed. The method computes a plurality equations using...
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7043363 |
Host based satellite positioning systems
Methods and systems consistent with the present invention provide a host based positioning system. The host based positioning system includes a tracker hardware interface that connects to a...
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7032857 |
Multi-sensor guidance system for extreme force launch shock applications
A projectile navigation system operable within an extremely high G-shock loading environment during the launch phase may include a set of Kalman filters configured to repeatedly calculate a...
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7007888 |
Inertial position target measuring systems and methods
Systems and methods for contiguously and accurately updating target object information during an entire target engagement period are provided. The target tracking system includes a database for...
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6863244 |
Mitigation of angular acceleration effects on optical sensor data
A method, apparatus, article of manufacture, and a memory structure for compensating for optical sensor data corrupted by angular acceleration is disclosed. The method comprises the steps of...
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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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6859729 |
Navigation of remote controlled vehicles
Methods for navigating a remote controlled vehicle, methods for maintaining a formation of remote controlled vehicles, and remote controlled vehicles using those methods. A vehicle is navigated...
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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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6766227 |
Attitude-acquisition methods and systems for controlled spacecraft attitude
Attitude acquisition methods and systems are provided which reduce the time generally required to acquire spacecraft attitude estimates and enhance the probability of realizing such estimates. The...
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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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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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6566640 |
System and method for autonomous correction of star tracker high spatial frequency (HSF) error
A method and apparatus for post processing a star tracker measurement to remove a systematic error characterizable at least in part by a pixel phase is disclosed. The method comprises the steps of...
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6523786 |
Apparatus for determining attitude of artificial satellite
An apparatus for determining the attitude of an artificial satellite by narrowing attitude candidates to a correct one in a short time. The apparatus has star sensors, a star catalog data base,...
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6512979 |
Lost-in-space stellar attitude acquisition using multiple star trackers
A method, apparatus, article of manufacture for determining the attitude of a spacecraft having at least one star sensor. The method comprises the steps of selecting a first reference star sensor...
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6417798 |
Method and apparatus for position and attitude control of a satellite
An apparatus for regulating or controlling a satellite includes: at least one sensor for detecting reference targets such as stars, which is connected to arrangements for selecting and determining...
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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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6330988 |
System for star catalog equalization to enhance attitude determination
An apparatus for star catalog equalization to enhance attitude determination includes a star tracker, a star catalog and a controller. The star tracker is used to sense the positions of stars and...
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6324475 |
Method for identifying in a pre-established catalogue stars detected by a star sensor
The invention concerns the identification of stars. It consists in selecting "detected stars" among the sensed stars; coupling the detected stars; selecting all or part of the doublets of the...
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6317660 |
Method for using satellite state vector prediction to provide satellite sensor automatic scan inhibit and/or sensor switching
A method for use on a satellite that automatically inhibits scanning of an Earth sensor to handle sensor intrusions by the sun, moon, or other celestial bodies. In implementing the method, a...
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6314393 |
Parallel/pipeline VLSI architecture for a low-delay CELP coder/decoder
An integrated circuit for processing a speech signal in accordance with a CELP standard includes a plurality of processing elements coupled to a data bus in parallel. Each processing element...
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6304822 |
Spacecraft attitude control systems with dynamic methods and structures for processing star tracker signals
Methods are provided for dynamically processing successively-generated star tracker data frames and associated valid flags to generate processed star tracker signals that have reduced noise and a...
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6304799 |
Apparatus and method for lasercom tracking acquisition
An apparatus for determining the pointing uncertainty of a satellite communications system comprises a communications terminal coupled to a pointing mechanism which is operative to move and...
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6272432 |
System and method for correcting star tracker low spatial frequency error in stellar-inertial attitude determination systems
A system and method of estimating the attitude of a spacecraft compares a three-axis inertial-based estimate of spacecraft attitude to a stellar-based estimate of the spacecraft attitude. A Kalman...
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6266616 |
Confused-in-space stellar attitude acquisition using multiple star trackers
A method, apparatus, article of manufacture for determining the attitude of a spacecraft having at least one star sensor. The method comprises the steps of preparing, for each star sensor, an...
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6253125 |
Method and apparatus for generating orbital data
Satellite control data in the form of state vectors and state vector products are generated representing the position and geometric relationships of the space craft to the Earth, sun, moon, and...
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6236939 |
Method and apparatus for controlling spacecraft attitude with rotational star trackers
High precision spacecraft attitude determination is produced by specially positioning the spacecraft's star trackers and then filtering out measurement errors produced from star tracker...
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6158694 |
Spacecraft inertial attitude and rate sensor control system
Disclosed is a method and apparatus (1'; 1") for tracking a stellar body (22) using a telescope (9; 32) of a spacecraft (e.g., a satellite) (10; 10"). In accordance with an embodiment of the...
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6133997 |
System for spotting moving objects based on a plurality of artificial satellites
A system for spotting moving objects based on a plurality of artificial satellites including: a step of taking images at the same point in time by using imaging devices respectively mounted on at...
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