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US20110233344 Satellite control system  
In a satellite control system, a liquid is ejected by thermal ejection from holes in a substrate structure to create a reactive force on the satellite allowing the position, such as the attitude,...
US20110233343 Satellite control system  
In a satellite control system, a liquid is ejected by thermal ejection from holes in a substrate structure to create a reactive force on the satellite allowing the position, such as the attitude,...
US20110155858 METHOD FOR CONTROLLING SATELLITE ATTITUDE, AND ATTITUDE-CONTROLLED SATELLITE  
A method for controlling the attitude of a satellite in orbit around a celestial object, the satellite including an observation instrument, a solar panel, a radiator and a star sensor which are...
US20100314487 PREDICTING AND CORRECTING TRAJECTORIES  
Technology for predicting and correcting a trajectory is described. The technology can create a model to predict a position of the reusable launch vehicle at a time in the future; observe a wind...
US20150120096 Angles-Only Initial Orbit Determination (IOD)  
A methodology for initial orbit determination of an object about an astronomical body searches a grid of possible boundary values on the range-to-object over the observation interval to find the...
US20110010027 SYSTEMS AND METHODS FOR ATTITUDE PROPAGATION FOR A SLEWING ANGULAR RATE VECTOR  
Computer-based systems and methods for determining attitude of a moveable object. Attitude is determined by a transformation matrix {right arrow over (U)} from a body coordinate frame of the...
US20120253563 Positioning Satellites  
A method comprising: receiving first information for defining a first algebraic function that relates a time variable to a first mapped variable; using the function to convert a time variable...
US20150232203 GIMBAL OVER RATE PREVENTION SYSTEM AND METHOD  
A system and method for preventing a gimbal from exceeding a predetermined gimbal rate limit includes receiving a gimbal rate command and a gimbal rate feedback signal representative of sensed...
US20110297794 METHOD OF NAVIGATING A SPINNING, ARTIFICIAL SATELLITE AND CONTROLLING THE GLOBAL, TERRESTRIAL SURVEILLANCE COVERAGE THEREOF  
A method of controlling inertial attitude of an artificial satellite in order to perform a navigation function and to maximize terrestrial coverage of the Earth by the satellite. The method...
US20120053764 PARTICLE SWARM-BASED MICRO AIR LAUNCH VEHICLE TRAJECTORY OPTIMIZATION METHOD  
The particle swarm-based micro air launch vehicle trajectory optimization method is carried out by formulating a parameter optimization problem, which is solved using a particle swarm optimization...
US20110196550 Method and apparatus for initial orbit determination using high-precision orbit propagation and maneuver modeling  
A method of determining an orbit of an orbital object includes computing predicted tracking measurement values based on the orbit computed from the initial conditions factoring in any modeled...
US20090299553 Satellite Control  
A satellite has a depletion detector arranged in a propellant line such that, when depletion is detected, the amount of propellant remaining in the propellant lines is sufficient to dispose of the...
US20120232724 REFINING A POSITION ESTIMATE OF A LOW EARTH ORBITING SATELLITE  
In a method for refining a position estimate of a low earth orbiting (LEO) satellite a first position estimate of a LEO satellite is obtained with a GNSS receiver on-board the LEO satellite. The...
US20080059009 SYSTEMS AND METHODS FOR INTERPLANETARY NAVIGATION  
Systems and methods for interplanetary space navigation are provided. In one embodiment, a system for navigating a spacecraft in outer space is provided. The system comprises means for...
US20150197351 TRAJECTORY GENERATION DEVICE, TRAJECTORY GENERATION METHOD, AND STORAGE MEDIUM HAVING TRAJECTORY GENERATION PROGRAM STORED THEREIN  
A trajectory generation device includes a control target (1), an angle detector (2), a command generator (5) and a trajectory generator (6). If a change is generated from a current target angle to...
US20090132105 Proximity Spacecraft Maneuvering  
Provided is a method and system for maneuvering a first spacecraft relative to a nearby second spacecraft that occupies a finite volume of space including obstacles in the vicinity of the second...
US20120016541 System and Method for Assessing the Risk of Conjunction of a Rocket Body with Orbiting and Non-Orbiting Platforms  
A system and method for assessing the risk of conjunction of a rocket body with orbiting and non-orbiting platforms. Two-body orbital dynamics are used to initially determine the kinematic access...
US20120013478 System and Method for Assessing the Risk of Conjunction of a Rocket Body with Orbiting and Non-Orbiting Platforms  
A system and method for assessing the risk of conjunction of a rocket body with orbiting and non-orbiting platforms. Two-body orbital dynamics are used to initially determine the kinematic access...
US20120018585 MEDIUM EARTH ORBIT CONSTELLATION WITH SIMPLE SATELLITE NETWORK TOPOLOGY  
A method, a member satellite, and a tangible machine-readable medium are disclosed. An inter-satellite link subsystem 472 may maintain a fixed communication link between the member satellite and a...
US20070050102 Space based navigation system  
The invention is a spaced based navigation system for guiding a spacecraft. In detail, the navigation system includes at least two Doppler range/range rate satellites positioned at LaGrangian...
US20150251777 SPACE OBJECT DISPOSAL DEVICE AND SPACE OBJECT DISPOSAL METHOD  
Disclosed are a space object disposal device and a space object disposal method using a rotation motion. The device for disposing a space object includes: a disposal orbit calculation unit...
US20130085628 Modified Kalman Filter for Generation of Attitude Error Corrections  
Methods, systems, and computer-readable media are described herein for using a modified Kalman filter to generate attitude error corrections. Attitude measurements are received from primary and...
US20050171653 Satellite coverage region detection  
A system and method for determining when a moving mobile platform will enter or exit a satellite coverage region. In a preferred form the method involves determining a plurality of boundary...
US20080177430 SATELLITE NAVIGATION USING LONG-TERM NAVIGATION INFORMATION AND AUTONOMOUS ORBIT CONTROL  
An improved approach to satellite-based navigation (e.g., GPS) is provided. In one embodiment, a method includes determining a nominal orbital path of a navigation satellite. The method also...
US20120303185 SPACECRAFT MOMENTUM MANAGEMENT USING SOLAR ARRAY  
Stored momentum on a spacecraft is managed by determining a target profile of stored momentum as a function of time for the spacecraft; measuring a difference between a momentum value actually...
US20060241824 Method of injecting plurality of spacecrafts into different orbits individually  
Disclosed is a method for injecting a plurality of spacecrafts into different circum-earth or interplanetary orbits individually in a single launch. A plurality of spacecrafts coupled to an assist...
US20120248253 MULTI-BODY DYNAMICS METHOD OF GENERATING FUEL EFFICIENT TRANSFER ORBITS FOR SPACECRAFT  
A method of generating orbital transfers for spacecraft. The method provides an innovative technique for transferring spacecraft from one Earth orbit to another Earth orbit using significant solar...
US20140032022 Method For Reducing the Angular Momentum and Controlling the Attitude of a Spacecraft  
A method for reducing the angular momentum of a spacecraft comprises a propulsion device able to generate a torque along a Z axis corresponding to an axis of maximum inertia or minimum inertia of...
US20140236401 Star Tracker Rate Estimation with Kalman Filter Enhancement  
An attitude estimator that uses star tracker measurements and enhanced Kalman filtering, with or without attitude data, to provide three-axis rate estimates. The enhanced Kalman filtering...
US20100042274 ATTITUDE CONTROL METHOD USING TARGET TRACK APPROXIMATION  
Provided is a method for controlling an attitude of a satellite using target track approximation. The method includes the steps of: a) receiving coordinate information of at least one of target...
US20080023587 Autonomous Space Flight System and Planetary Lander for Executing a Discrete Landing Sequence to Remove Unknown Navigation Error, Perform Hazard Avoidance and Relocate the Lander and Method  
An autonomous unmanned space flight system and planetary lander executes a discrete landing sequence including performing an initial velocity braking maneuver to remove velocity at altitude,...
US20110309200 Apparatus, Satellite and Method for Trapping High-Speed Particles  
An apparatus for trapping high-speed particles, such as space debris, is provided. The apparatus includes a first front tapping surface and at least one rear trapping surface. The front and rear...
US20090001220 Direct torque actuator control for control moment gyroscope  
A control moment gyroscope system for delivering a target torque to a spacecraft including a rotor assembly having a rotor and a motor to spin the rotor about a rotor axis. A gimbal assembly has a...
US20090222153 METHOD OF DETERMINING AND CONTROLLING THE INERTIAL ATTITUDE OF A SPINNING, ARTIFICIAL SATELLITE AND SYSTEMS THEREFOR  
A method of and apparatus for determining and controlling the inertial attitude of a spinning artificial satellite without using a suite of inertial gyroscopes. The method and apparatus operate by...
US20110153122 ON-LINE INERTIA ESTIMATION FOR USE IN CONTROLLING AN AEROSPACE VEHICLE  
A system for controlling an aerospace vehicle using on-line inertia estimation may include an attitude sensor to measure an attitude of the aerospace vehicle. The system may also include a...
US20120022726 Method for Maintaining Pose of Spacecraft  
Embodiments of invention disclose a system and a method for formation-keeping of a spacecraft in response to a displacement of the spacecraft to a displaced pose with respect to at least one...
US20140365043 Estimation Of Propellant Remaining In A Satellite  
An amount of propellant remaining in an orbiting satellite can be estimated in a more accurate manner than is possible with conventional approached. Pressure and temperature telemetry data...
US20070032924 Method and device for assisting the lateral control of an aircraft running on a runway  
Method and device for assisting the lateral control of an aircraft running on a runway. The system (1) comprises a detector (3) for measuring a lateral deviation of the aircraft relative to a...
US20150149001 MANEUVER PROCESSING  
A computing device may detect that a space object has undergone a maneuver and may attempt to calculate a solution to that maneuver based in part on start and stop times and thrust uncertainties...
US20080275598 Trajectory Estimation System for an Orbiting Satellite  
In one embodiment of the disclosure, a computing system includes a processor and a computer readable medium. The computer readable medium is operable to, when executed on the processor, determine...
US20050090948 Process for determining the position of a spacecraft with the aid of a directional vector and a total angular momentum measurement  
In a method for determining the position of a spacecraft based on vector determinations, a direction vector is measured in a body-fixed coordinate system; a reference direction vector is...
US20050131592 In-flight control system stability margin assessment  
A method for in-flight stability margin assessment includes steps of: exciting a control system with a wide band spectrum excitation signal to produce in-flight data; storing the in-flight data in...
US20100140413 METHOD FOR MAXIMUM DATA COLLECTION WITH A CONTROL MOMENT GYROSCOPE CONTROLLED SATELLITE  
The present invention relates to a method for maneuvering an imaging satellite, and more particularly a method for commanding control moment gyroscopes on an imaging satellite to change the...
US20080004758 Apparatus and method for tracking an orbital body relative to a planetary body using a single sensor  
A system and method are disclosed for tracking a position of an orbital body relative to a planetary body. A processor (602) with memory (603) stores reference data associated with the planetary...
US20080228332 ACTIVE CONTROL OF SOFT HYBRID ISOLATION SYSTEMS  
Apparatus, Systems, and Methods are provided for controlling motion of a spacecraft. One apparatus includes a non-contacting actuator and a passive mechanical system coupled in parallel with one...
US20100228407 METHOD OF DETERMINING AND CONTROLLING THE INERTIAL ATTITUDE OF A SPINNING, ARTIFICIAL SATELLITE AND SYSTEMS THEREFOR  
A method of and apparatus for determining and controlling the inertial attitude of a spinning artificial satellite without using a suite of inertial gyroscopes. The method and apparatus operate by...
US20110297795 SPACECRAFT PANEL ARCHITECTURE  
One embodiment of the invention includes a spacecraft system. The system includes a spacecraft payload system coupled to a spacecraft frame. The system also includes a plurality of spacecraft...
US20090222152 DEVICE FOR CONTROL OF RELATIVE POSITION(S) BY MEASUREMENTS OF POWER, FOR A SPACECRAFT OF A GROUP OF SPACECRAFT IN FORMATION  
A control device (D) for a spacecraft of a group of spacecraft intended to travel in a chosen formation comprises i) a set of at least three send/receive antennas (A1-A3) installed on at least...
US20150246736 Reusable Staging System For Launch Vehicles  
A reusable staging system comprising of a processor-based device configured to monitor one or more rocket stages of a launch vehicle having a payload, wherein the processor-based device has at...
US20090012662 Method and apparatus for determining a satellite attitude using crosslink reference signals  
A method and apparatus for determining the attitude of a satellite using crosslink information is disclosed. The method and apparatus integrates data from the crosslinks with data available from...

Matches 1 - 50 out of 80 1 2 >