Patent US5041833A successfully refreshed from Google Patents.
US5041833A
Expired / Lapsed
US
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Precise satellite ranging and timing system using pseudo-noise bandwidth synthesis
Assignee: ITT Manufacturing Enterprises LLC
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Filing: 1990-06-04
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Granted: 1991-08-20
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Expires: 2010-06-04
Abstract
Abstract A precise ranging and timing system using pseudo-noise bandwidth synthesis to provide precise orbit determination for geosynchronous and low earth orbit satellites, navigation of low earth orbiting satellite through signals transmitted through geosynchronous satellites and precise time-transfer. The system includes a novel signal structure which is comprised of disjoint, narrow band, spectral components spread over a wide bandwidth. The number of spectral components, their individual bandwidths, and their specific spectral locations over the end-to-end spread bandwidth determine the ultimate capabilities and performance achievable. The broad beam transmission of the precise ranging and timing system signal via a geosynchronous satellite provide the precise ranging and timing system capability to suitably equipped users for a multiplicity of purposes including: (1) precise orbit determination, (2) navigation of low-earth orbiting satellites through signals transmitted through geosynchronous satellites, and (3) precise time transfer.
Inventors
- 👤 Aaron Weinberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:53
CPC Classifications
G; G01; G01S; G01S11/00; G01S11/02; G01S11/08; G01S5/00; G01S5/02; G01S5/14; H; H04; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/185; H04B7/1853; H04B7/18545; H04B7/18547; H04B7/1855; H04B7/18552
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
221 words
A satellite ranging and timing system in which a master station on earth transmits signals to an earth orbiting communication satellite and a plurality of remote stations within radio view of said satellite and communicate with each other and said master station via said communications satellite, said ranging and timing system including, means at said master station for generating and transmitting a wide bandwidth pseudo-noise signal, said wide bandwidth pseudo-noise signal being comprised of a plurality of disjoint narrow-band spectral components, said master station including a master system clock for controlling the generation and transmission of said wide bandwidth pseudo-noise signal, and means for determining from return of components of said pseudo-noise signal from said earth orbiting communication satellite orbit data of said satellite and transmitting said orbit data to all other stations via said satellite, means at each of said plurality of remote stations for receiving said wide-band pseudo-noise signal and deriving data including range information to said communications satellite, means at each of said stations for transmitting said range information to said master station, and means at said master station for receiving said wide-band pseudo-noise signal and deriving data including range information for said stations from different ones of said disjoint narrow-band spectral components and determining orbit data of said communication satellite and provide real time satellite position data.
Claim 2
Dependent Claim
221 words
A satellite ranging and timing system in which a master station on earth transmits signals to an earth orbiting communication satellite and a plurality of remote stations within radio view of said satellite and communicate with each other and said master station via said communications satellite, said ranging and timing system including, means at said master station for generating and transmitting a wide bandwidth pseudo-noise signal, said wide bandwidth pseudo-noise signal being comprised of a plurality of disjoint narrow-band spectral components, said master station including a master system clock for controlling the generation and transmission of said wide bandwidth pseudo-noise signal, and means for determining from return of components of said pseudo-noise signal from said earth orbiting communication satellite orbit data of said satellite and transmitting said orbit data to all other stations via said satellite, means at each of said plurality of remote stations for receiving said wide-band pseudo-noise signal and deriving data including range information to said communications satellite, means at each of said stations for transmitting said range information to said master station, and means at said master station for receiving said wide-band pseudo-noise signal and deriving data including range information for said stations from different ones of said disjoint narrow-band spectral components and determining orbit data of said communication satellite and provide real time satellite position data.
Claim 3
Dependent Claim
178 words
A satellite ranging and timing system in which a master station on earth transmits signals to an earth orbiting communication satellite and a plurality of remote stations within radio view of said satellite communicate with each other and said master station via said communications satellite, said ranging and timing system including, means at said master station for generating and transmitting a wide bandwidth pseudo-noise signal, said wide bandwidth pseudo-noise signal being comprised of a plurality of disjoint narrow-band spectral components, and means at each of said plurality of remote stations for receiving said wide-band pseudo-noise signal and deriving data including range information to said communications satellite, means at each of said stations for transmitting said range information to said master station, means at said master station for receiving said range information from said remote stations, said master station including means providing a calibration signal, and means at said master station for determining the orbit data of said satellite from said range information and said calibration information and producing real time satellite position data at each of said stations.
Claim 4
Dependent Claim
178 words
A satellite ranging and timing system in which a master station on earth transmits signals to an earth orbiting communication satellite and a plurality of remote stations within radio view of said satellite communicate with each other and said master station via said communications satellite, said ranging and timing system including, means at said master station for generating and transmitting a wide bandwidth pseudo-noise signal, said wide bandwidth pseudo-noise signal being comprised of a plurality of disjoint narrow-band spectral components, and means at each of said plurality of remote stations for receiving said wide-band pseudo-noise signal and deriving data including range information to said communications satellite, means at each of said stations for transmitting said range information to said master station, means at said master station for receiving said range information from said remote stations, said master station including means providing a calibration signal, and means at said master station for determining the orbit data of said satellite from said range information and said calibration information and producing real time satellite position data at each of said stations.
Claim 5
Dependent Claim
66 words
The satellite ranging and timing system defined in claim 2 wherein, said master station includes a master system clock for controlling the generation and transmission of said wide bandwidth pseudo-noise signal, and means for determining from return of components of said pseudo-noise signal from said earth orbiting communications satellite orbit data of said satellite and transmitting said orbit data to all other stations via said satellite.
Claim 6
Dependent Claim
123 words
A satellite ranging and timing system in which a master station on earth transmits pseudo-noise signals to an earth orbiting communications satellite and a plurality of remote station within radio view of said satellite to communicate with each other and said master station via said communication satellite, said ranging and timing system including: means at said master station for generating and transmitting a wide-band pseudo-noise signal, said wide-band pseudo-noise signal being comprised of a plurality of mutually coherent disjoint, narrow-band, spectral components which are frequency division multiplexed over said wide-band width, and means at said master station for receiving said wide-band pseudo-noise signal, demultiplexing same and deriving data including range information for said stations from different ones of said disjoint narrow-band spectral components.
Claim 7
Dependent Claim
123 words
A satellite ranging and timing system in which a master station on earth transmits pseudo-noise signals to an earth orbiting communications satellite and a plurality of remote station within radio view of said satellite to communicate with each other and said master station via said communication satellite, said ranging and timing system including: means at said master station for generating and transmitting a wide-band pseudo-noise signal, said wide-band pseudo-noise signal being comprised of a plurality of mutually coherent disjoint, narrow-band, spectral components which are frequency division multiplexed over said wide-band width, and means at said master station for receiving said wide-band pseudo-noise signal, demultiplexing same and deriving data including range information for said stations from different ones of said disjoint narrow-band spectral components.
Claim 8
Dependent Claim
52 words
A satellite ranging and timing system defined in claim 4 wherein at least one of said plurality of remote stations includes means for receiving and demultiplexing said wide-band pseudo-noise signal and deriving data including range information for that station from said disjoint narrow-band spectral components of said frequency division multiplexed wide-band signal.
References Cited (Backward Citations)
US4445118A
Cited
US4751512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-19 | 1995-02-18 | 1995-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-19 | 1999-02-18 | 1999-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-19 | 2003-02-18 | 2003-08-20 | $7700.00 | Window Closed / Lapsed |