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7555297 |
High altitude platform deployment system
A communication system for supporting communications with a target market area. The system includes one or more solar-powered aircraft maintained in, or successively passing through, flight...
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7545764 |
Synchronized code recognition
A system includes a central controller to transmit a plurality of synchronization codes through a transmission medium and a plurality of satellite controllers, each satellite controller configured...
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7486224 |
Microwave and millimeter frequency bistatic radar tracking and fire control system
A bistatic passive radar system for tracking at least one target utilizing means for transmitting radar signals from at least one satellite platform in a geosynchronous orbit with the earth, means...
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7466264 |
System and method for providing assistance data within a location network
A system and method for providing assistance to a position receiver in a location network consisting of a Global Navigation Satellite System (GNSS) and a synchronized network of positioning-unit...
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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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7432852 |
Method of synchronizing base stations of a terrestrial cellular communication network
The present invention relates to a method of synchronizing base stations of a terrestrial cellular communication system using a satellite component.
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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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7391677 |
Positioning device, positioning method, and timepiece having the positioning device
A positioning device has a reception unit for receiving navigation messages transmitted continuously in a time series from positioning information satellites orbiting the Earth and determines the...
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7369847 |
Fixed cell communication system with reduced interference
A communication system has a high altitude communication device that has an antenna for directing beams to a fixed cell pattern with a polarity of cells. A specific pattern of cells having the same...
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7317895 |
Method of controlling a satellite communication system, a timing unit, and a control unit of a timing unit
A method of controlling a satellite communication system, a timing unit, and a control unit of a timing unit. The method comprises dividing the coverage area of the satellite communication system...
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7200414 |
Client-aiding with cellphones in a 150-KM radius area
A cellphone system comprises a GPS reference station located with a telephone cell site. Such GPS reference station tracks the GPS satellites visible to its local area and estimates the Doppler for...
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7142154 |
Time and frequency synchronizations of equipment at different locations
Method and apparatus for providing accurately synchronized timing signals at mutually distant locations employs a GPS or similar receiver at each location. These receivers are interconnected by a...
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7123186 |
Controlling solution latency in a global navigation satellite receiver
A satellite positioning device is disclosed for determining position based on received satellite navigation signals and a received non-satellite signal. A local clock controls the epoch period of a...
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7065348 |
Communication system for providing information on position of communication party
A method for providing location information. In the method a demand of providing location information of a terminal of a second user is accepted from a terminal of a first user. An approval of the...
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6954613 |
Fixed satellite constellation system employing non-geostationary satellites in sub-geosynchronous elliptical orbits with common ground tracks
Shows orbit-constellation of satellites that appears virtually geosynchronous.
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6944450 |
Communications system
This disclosure provides a communications system using a span-loaded flying wing, traveling at relatively slow speeds, that can remain airborne for long periods of time. The communications system...
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6853894 |
Global network based vehicle safety and security telematics
The present invention relates to a global network based vehicle safety and security system and method. In this regard, a global network based data processing resource can wirelessly data...
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6824107 |
Artificial satellite with an orbit having a long staying time in a zenith direction, an orbit control method and a communication system therewith
A transmission or communication system, wherein plural individual elliptical orbits are so defined that an individual right ascension of a north-bound node is established with a designated angle....
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6795771 |
Method and apparatus for correlating a satellite signal with a reference code
A method and apparatus for correlating a satellite signal with a reference code is described. In an example, samples of a satellite signal having a repeating code are received. At least one fast...
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6795687 |
Elliptical satellite system emulating characteristics of geosynchronous satellites during the apogee portion of an elliptical orbit
An array of satellites which is virtually geosynchronous. Each satellite is in an elliptical orbit. The apogee portion of each elliptical orbit is over one of the regions of interest. Each...
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6781968 |
Wireless communication system, apparatus and method using an atmospheric platform having a wideband trunkline
A system, apparatus and method provide wireless communications to a geographical area. The system includes at least one atmospheric platform serving as a central relay or node using a star network...
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6683565 |
Method of determining the position of geostationary satellites by transit time measurements of satellite navigation signals
A method of determining the position of geostationary satellites by means of signals of at least one navigation satellite. A determination is made of data concerning the transit times of the...
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6678519 |
Elliptical satellite system which emulates the characteristics of geosynchronous satellites
An elliptical satellite communication system including a constellation of satellites which orbit the earth at a height less than that necessary for geosynchronous orbits but which simulate the...
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6661373 |
Antenna alignment meter
The present invention relates to an antenna alignment meter which comprises a receiver for detecting a signal with predetermined characteristics and outputting data pertaining to the detection of...
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6608590 |
Alignment of antenna polarization axes
A method for aligning an antenna polarization axes of a dual polarized end-user terminal having an antenna. The antenna is aligned with a satellite in relation to azimuth and elevation. The...
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6529161 |
Antenna control method and antenna controller
An antenna controller comprises an antenna beam control unit for controlling the direction of an antenna beam of an antenna, an inertial navigation system for acquiring motion information on a...
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6515617 |
Method and system for position determination using geostationary earth orbit satellite
A system ( 20 ) and method ( 30 ) for estimating the location of a terrestrial-based user terminal ( 23 ) is provided. The user terminal ( 23 ) is capable of measuring the relative signal strengths...
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6504504 |
Antenna system for receiving signals that are transmitted by geostationary satellite
The antenna system comprises a reflector which can be motionless, a source device and a device for treating the signals received by the source device. The system comprises means for automatically...
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6453237 |
Method and apparatus for locating and providing services to mobile devices
A method and apparatus for locating mobile device over a broad coverage area using a wireless communications link that may have large and unknown latency. The apparatus comprises at least one...
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6442148 |
Reconfigurable multibeam communications satellite having frequency channelization
A satellite subsystem for a satellite employs a reconfigurable communications payload and active array antennas. The subsystem includes an active receive array antenna having a reconfigurable beam...
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6417799 |
Method of locating an interfering transmitter for a satellite telecommunications system
The invention relates to a method of locating a jammer ( 14 ) of a satellite telecommunications system ( 10 ). To locate the jammer, at least two of the following three measurements are performed: ...
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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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6380891 |
GPS receiver with satellite frame synchronization process
A GPS receiver has a plurality of data demodulator circuits assigned to a plurality of GPS satellites, respectively, and a data memory which stores detailed orbit information of the GPS satellites....
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6366853 |
Utilizing navigation direction data in a mobile antenna signal combiner
A method of controlling an antenna signal combiner in a vehicle having multiple antenna elements. The method comprises the steps of receiving broadcast signals from the antenna elements. An antenna...
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6351235 |
Method and system for synchronizing receiver systems of a wireless location system
In a wireless location system (WLS) including a plurality of geographically separated receiver systems, a system for synchronizing the respective receiver systems includes the use of an enhanced...
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6333924 |
High latitude geostationary satellite system
A satellite broadcast and communication system employing a constellation of satellites in highly elliptical and highly inclined orbits, where the satellites remain almost stationary relative to...
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6324586 |
System for synchronizing multiple computers with a common timing reference
A synchronized timing system is disclosed for one or more of a plurality of network interconnected computers. The system utilizes a global satellite system and includes a receiver device for...
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6219617 |
Method for determining the orbital positions of satellites in LEO networks
In order to achieve a considerable reduction of the outlay required on the ground in connection with the accurate calculation of the exact orbital position of each individual satellite of a...
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6127967 |
Low-earth orbit satellite acquisition and synchronization system using a beacon signal
A system for acquiring the beacon of a satellite and synchronizing data transmission between the satellite and a ground terminal is disclosed. The ground terminal conducts a search for a satellite...
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5971324 |
Multiple altitude satellite relay system and method
A multiple altitude satellite relay system is disclosed in which Medium Earth Orbit satellites are continuously linked with at least one geosynchronous satellite to provide uninterrupted relaying...
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5911389 |
Wave based satellite constellation
A constellation (100) comprising a plurality of man-made satellites (1-27). The satellites (1-27) orbit a celestial body (110) along a plurality of orbits (120-128), which are located at a...
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5907578 |
Weighted carrier phase multipath reduction
The effect of the multipath distortions on the carrier phase measurements is reduced by using the weighted correlation functions. The generators of both periodic and dynamic weighted functions are...
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5859610 |
Method and a system for locating ground equipment transmitting via satellites
A method and a system for locating ground equipment transmitting signals to a geostationary satellite, the method and the system being based on identifying the arrival directions of such signals...
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5848099 |
Method and system for testing phase imbalance in QPSK receivers
A method or system (10) includes test apparatus (14) for measuring the phase imbalance in a QPSK receiver (12). A signal generator (16) provides a test signal (18) to the receiver (12), which...
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5810297 |
Satellite cluster attitude/orbit determination and control system and method
A satellite attitude/orbit control system (300) for managing a satellite cluster (200) in a satellite constellation (207). A satellite cluster (200) comprises a master satellite (203) and secondary...
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5621646 |
Wide area differential GPS reference system and method
A GPS reference system and corresponding method utilizing a network of reference stations and a master station. Each reference station receives GPS signals from GPS satellites it observes and...
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5619211 |
Position locating and communication system using multiple satellite constellations
A communication and position locating system (2) suitable for air traffic control is described. Multiple satellites (40) are provided in two geosynchronous constellations. One constellation (e.g.,...
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5551624 |
Medium-earth-altitude satellite-based cellular telecommunications
A satellite-based cellular telecommunications system employing a constellation of telecommunications satellites in medium earth orbit to provide multibeam radio frequency (rf) communications links...
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5506781 |
RF link control of satellite clocks
A system and method for maintaining a precise time standard among a system of orbiting satellites is disclosed. In an illustrative embodiment, atomic clock data is circulated among the satellites...
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5467282 |
GPS and satellite navigation system
A satellite-based navigation system providing improved accuracy and reliability over wide geographical areas, including remote regions, is disclosed. Ranging-type signals transmitted through two or...
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