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7388539 |
Carrier track loop for GNSS derived attitude
A method and system for reducing Global Navigation Satellite System (GNSS) carrier tracking loop ambiguities comprising: receiving a plurality of GNSS satellite signals with a first antenna in...
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7388538 |
System and method for obtaining attitude from known sources of energy and angle measurements
A system and method of determining an orientation of a spinning object at a known GPS location comprises radially deploying antennae around a plurality of axes of measurement of the spinning...
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7355549 |
Apparatus and method for carrier phase-based relative positioning
A carrier phase-based relative positioning apparatus includes a plurality of antennas fixedly mounted on a moving body for receiving positioning signals from satellites, an inertial measurement...
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7346452 |
Inertial GPS navigation system using injected alignment data for the inertial system
An inertial (“INS”)/GPS receiver uses injected alignment data to determine the alignment of the INS sub-system when the receiver is in motion during start-up. The alignment data is determined...
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7292185 |
Attitude determination exploiting geometry constraints
A method and system for determining at least one attitude angle of a rigid body. The method comprising: receiving a plurality of Global Navigation Satellite System (GNSS) satellite signals with a...
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7230567 |
Azimuth/attitude detecting sensor
The sensor successively calculates a rolling angle, pitch angle and azimuth from the coordinate transformation matrix with the level error and azimuth error compensated. It calculates azimuth error...
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7193559 |
Inertial GPS navigation system with modified kalman filter
An inertial (“INS”)/GPS receiver includes an INS sub-system which incorporates, into a modified Kalman filter, GPS observables and/or other observables that span previous and current times. The...
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7187323 |
Apparatus for controlling antenna in stratospheric platform and stratospheric platform system having the same
Provided is an antenna control apparatus for controlling an antenna mounted on a stratospheric platform of the stratospheric communication system. The apparatus includes a plurality of location...
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7123187 |
Technique for determining relative yaw using phase windup
A technique uses “phase windup” to determine relative yaw of a craft from a plurality circularly polarized signals transmitted from one or more transmission sources. A first difference in...
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7076342 |
Attitude sensing apparatus for determining the attitude of a mobile unit
An attitude sensing apparatus for determining the attitude of a mobile unit is provided that can reliably estimate an alignment angle between a GPS antenna coordinate system and an IMU coordinate...
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6993345 |
Positioning system of wireless terminal
A wireless terminal has the enhanced performance in the attainability of successful search of GPS satellites based on the operation of a position data server. The server sets a GPS satellite search...
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6992624 |
Attitude determination system using null-steered array
Apparatus and process for determining the position and heading or attitude of an antenna array are described based on radiating sources, preferably GNSS or other such satellite positioning systems....
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6990351 |
Equipment for the calculation of mobile handset position
Even in areas where signals from only two or less base stations are available for position calculation, the mobile handset position can be calculated, expanding the position information service...
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6906664 |
Method and system using a GPS-based phased-array scheme for three-axis attitude determination
A method and system for determining three-axis attitude from line-of-sight (LOS) solutions for two or more GPS satellites uses intersections of null cone patterns and LOS vectors to the GPS...
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6900759 |
Terminal equipment of golf play information and analyzing system thereof
A portable terminal is used so as to provide play results of a golf player and information necessary for the golf player wherein the golf player inputs a score into the portable terminal and thus...
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6844847 |
Method and device for instantaneous determination of orientation, based on satellite positioning signals
Measurement of orientation of a mobile in space, for example the heading of a ship with the aid of receivers of satellite-based radio positioning signals. To obtain a measurement of orientation...
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6792380 |
Attitude angle detecting apparatus
An attitude angle detecting apparatus receives radio waves transmitted from a plurality of position-fixing satellites with multiple antennas located at specific positions of a mobile unit,...
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6792352 |
Vehicle data bus system with positioning means
A vehicle data bus system includes locating means which comprise a locating computing unit and a locating sensor system which contains at least one GPS receiver with associated GPS antenna and gyro...
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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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6760664 |
Autonomous navigation system based on GPS and magnetometer data
This invention is drawn to an autonomous navigation system using Global Positioning System (GPS) and magnetometers for low Earth orbit satellites. As a magnetometer is reliable and always provides...
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6728552 |
Mobile telecommunications terminals
A mobile telecommunications terminal including interface means suitable for communicating information to a user, the terminal being characterized in that it includes at least one sensor ( 4, 5 )...
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6720913 |
Lock slip detection using inertial information
A method for detecting lock slip using inertial information is provided. The method involves an epoch comparison of a predicted delta phase range with a measured delta phase range. The predicted...
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6621453 |
Satellite attitude adjustment for GPS initialization
By using the GPS satellite transmitted signals that are tracked on a satellite and those that should be tracked but are not due to the attitude of the satellite and rotating the satellite, two...
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6618593 |
Location dependent user matching system
A system and method for matching first and second mobile communications devices are provided. Preference or profile information associated with the first and second mobile communications devices is...
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6598009 |
Method and device for obtaining attitude under interference by a GSP receiver equipped with an array antenna
A GPS receiver that determines its own attitude under jamming conditions is created by augmenting it with an array antenna and a novel signal processing system. The augmented signal processing...
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6594582 |
GPS compound eye attitude and navigation sensor and method
The present invention is a GPS system for navigation and attitude determination, comprising a sensor array including a convex hemispherical mounting structure having a plurality of mounting...
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6593879 |
Using the global positioning satellite system to determine attitude rates using doppler effects
In the absence of a gyroscope, the attitude and attitude rate of a receiver can be determined using signals received by antennae on the receiver. Based on the signals received by the antennae, the...
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6580389 |
Attitude determination using a global positioning system
An apparatus and method for vehicle orientation determination is disclosed. A typical method comprises the steps of receiving position and velocity information data from a global positioning system...
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6518918 |
Wireless assisted altitude measurement
Disclosed is a communication device and method for estimating a more accurate vertical position or altitude of a communication device using atmospheric pressure measurements. In one embodiment, a...
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6463374 |
Form line following guidance system
A first form line is defined using two or more terrestrial locations. The first form line may be predefined or may be defined by user during a spraying operation. A second form line is then...
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6459406 |
GPS patch antenna attitude reference system
A pair of patch antennas are used to form a null slit antenna pattern for receiving GPS signals from at least three GPS satellites functioning as pseudo stars for spin rate and spin axis attitude...
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6441779 |
System and method of carrier-phase attitude determination
A system and a method for determining a satellite antenna attitude are disclosed. Radio signals from a satellite, such as a GPS satellite, are received by a plurality of coupled antenna elements...
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6421003 |
Attitude determination using multiple baselines in a navigational positioning system
A method and system for performing attitude determination for an array of receivers in a navigational positioning system are described. A navigational positioning system includes an array of...
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6336061 |
System and method for attitude determination in global positioning systems (GPS)
A system for attitude determination of a platform in global positioning systems (GPS) is disclosed herein. The system includes at least two receivers and an attitude determination circuit. The...
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6329945 |
System for improved GPS accuracy using a sky map
According to the invention, a system utilizing satellites of known locations produces a sky map containing quality values relating locations in the sky to the quality of signals received from those...
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6313788 |
Method and apparatus for reliable inter-antenna baseline determination
Disclosed is a method for inter-antenna baseline determination that uses an antenna configuration comprising a pair of relatively closely spaced antennas and other pairs of distant antennas. The...
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6292132 |
System and method for improved accuracy in locating and maintaining positions using GPS
A system and method are provided for using multiple GPS antennas and corresponding processors on a single vehicle in order to both maintain position information when fewer than four GPS satellites...
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6288671 |
Beacon-assisted spacecraft attitude control systems and methods
Control systems and methods are provided which enhance acquisition range, transient response and offset pointing accuracy in beacon-assisted orientation of a spacecraft to a desired spacecraft...
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6278404 |
Global positioning system satellite selection method
The satellite selection method as utilized by the spaceborne Global Positioning System receiver provides navigational solutions and is designed for use in low Earth orbit. The satellite selection...
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6266582 |
GPS analytic redundancy for gyroscope failure detection
An inertial measurement system for determining the attitude and rate of change of attitude of a vehicle such as an aircraft is disclosed. Redundancy of the inertial measurement system may be...
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6259398 |
Multi-valued variable ambiguity resolution for satellite navigation signal carrier wave path length determination
A method and system for performing integer ambiguity resolution for navigational positioning systems are described. A navigational positioning system includes a pair of receivers with antennas that...
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6256583 |
GPS attitude determination system and method using optimal search space identification for integer cycle ambiguity resolution
Disclosed are an integer cycle ambiguity resolution method, and attitude determining systems and apparatus using the same. In the method of determining a solution to an integer cycle ambiguity,...
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6211821 |
Apparatus and method for determining pitch and azimuth from satellite signals
A navigational apparatus includes a receiver, two antennas, and a computational unit to receive satellite positional signals and provides corrected position, azimuth, and pitch readings. The...
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6184825 |
Method and apparatus for radio frequency beam pointing
An RF beam pointing apparatus (500, 600) compensates for the effects of settling errors on antenna pointing. The beam pointing apparatus includes an attitude reference system (502, 528, 530, 534)...
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6166683 |
System and method for high-integrity detection and correction of cycle slip in a carrier phase-related system
A system and method of detecting and correcting for cycle slip in a GPS attitude determination system is presented. The method employs several techniques for detecting and correcting for faults in...
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6163021 |
Navigation system for spinning projectiles
A navigation system for spinning projectiles using a magnetic spin sensor to measure the projectile roll angle by sensing changes in magnetic flux as the projectile rotates through the earth's...
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6157891 |
Positioning and ground proximity warning method and system thereof for vehicle
A positioning and ground proximity warning method for vehicle includes the steps of outputting global positioning system signals to an integrated positioning/ground proximity warning system...
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6154170 |
Enhanced attitude determination system using satellite navigation receiver with antenna multiplexing
The position, velocity, time (PVT) and attitude (ATT) measurement system including a Master GPS antenna and a plurality of Slave GPS antennas is disclosed. The system comprises a hardware PVT...
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6101430 |
Global positioning system self calibration attitude determination
An improved GPS Attitude Receiver for spacecraft uses concurrent line-bias estimates derived from GPS signals for attitude determination. Attitude determination is obtained from GPS measurements by...
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6023240 |
Method for determining a phase measurement error map using rotating antenna information
A method for calculating the phase reception pattern of an antenna system utilized in attitude determination is disclosed. The antenna system is disposed on a platform (or rate table) that rotates...
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