Work Files Saved Searches
   My Account                                                  Search:   Quick/Number   Boolean   Advanced   Derwent    Help   


 The Delphion Integrated View
  Buy Now:   Buy PDF- 18pp  PDF  |   File History  |   Other choices   
  Tools:  Citation Link  |  Add to Work File:    
  View:  Expand Details   |  INPADOC   |  Jump to: 
  Go to:  Derwent  
 Email this to a friend  Email this to a friend 
       
Title: US5758260: Satellite beam steering reference using terrestrial beam steering terminals
[ Derwent Title ]

Country: US United States of America

View Images High
Resolution

 Low
 Resolution

 
18 pages

 
Inventor: Wiedeman, Robert A.; Los Altos, CA

Assignee: Globalstar L.P., San Jose, CA
other patents from GLOBALSTAR L.P. (719374) (approx. 64)
 News, Profiles, Stocks and More about this company

Published / Filed: 1998-05-26 / 1995-08-23

Application Number: US1995000518524
IPC Code: Advanced: B64G 1/24; B64G 1/36; B64G 3/00; G05D 1/08; H04B 7/195; H04B 7/204; H04B 7/216; B64G 1/10; B64G 1/66;
Core: B64G 1/00; more...
IPC-7: H04B 7/185;

ECLA Code: B64G1/24; B64G1/36B; B64G1/36C; B64G1/36D; B64G3/00; G05D1/08D; H04B7/204B;

U.S. Class: Current: 455/012.1; 244/164; 342/354; 342/355; 342/358; 701/221;
Original: 455/012.1; 244/164; 342/354; 342/355; 342/358; 364/454;

Field of Search: 455/12.1,13.1,13.4 244/164 342/352,353,354,355,357,358,359,368 364/434

Priority Number:
1995-08-23  US1995000518524

Abstract:     A satellite communication system has at least one satellite (1) with an antenna that generates a moving beam pattern on the surface of the earth. The beam pattern (3) is comprised of a plurality of sub-beams (4). A method of this invention determines an attitude correction signal for the satellite by the steps of: (a) providing at least one reference transmitter (10) at a known location on the surface of the earth; (b) transmitting at least one signal from the at least reference transmitter into at least one of the sub-beams; (c) receiving the at least one signal with the satellite antenna and transponding the received at least one signal to a ground station (8). A next step of the method (d) receives the transponded at least one signal with the ground station; (e) determines a gain of the received at least one signal; (f) compares the determined gain to a gain expected to be received based on a predetermined knowledge of a spatial variation in gain of the satellite antenna; and (g) and determines a difference between the determined gain and the expected gain to derive a correction signal indicative of an attitude error of the satellite. The method further includes the steps of transmitting the correction signal to the satellite; and correcting the attitude of the satellite in accordance with the correction signal.

Attorney, Agent or Firm: Perman & Green ;

Primary / Asst. Examiners: Pham, Chi H.;

Maintenance Status: E2 Expired  Check current status

INPADOC Legal Status: Show legal status actions          Buy Now: Family Legal Status Report

Designated Country: AU BR MX RU SG UA  DE FI FR GB IT 

Family: Show 10 known family members
First Claim:
Show all 38 claims		 What is claimed is:     1. In a satellite communication system comprising at least one satellite having an antenna that generates a moving beam pattern on the surface of the earth, the beam pattern being comprised of a plurality of sub-beams, a method for determining an attitude correction signal for the satellite comprising the steps of:
  • providing at least one reference transmitter at a known location on the surface of the earth;
  • transmitting at least one signal from the at least reference transmitter into at least one of the sub-beams;
  • receiving the at least one signal with the satellite antenna and transponding the received at least one signal to a ground station;
  • receiving the transponded at least one signal with the ground station;
  • determining a gain of the received at least one signal;
  • comparing the determined gain to a gain expected to be received based on a predetermined knowledge of a spatial variation in gain of the satellite antenna; and
  • determining a difference between the determined gain and the expected gain to derive a correction signal indicative of an attitude error of the satellite.
    •


Background / Summary: Show background / summary

Drawing Descriptions: Show drawing descriptions

Description: Show description

Forward References: Show 24 U.S. patent(s) that reference this one

       
U.S. References: Go to Result Set: All U.S. references   |  Forward references (24)   |   Backward references (26)   |   Citation Link

Buy
PDF		 Patent  Pub.Date  Inventor Assignee   Title
Buy PDF- 13pp US4567485  1986-01 Oshima et al.  Nippon Electric Co., Ltd. Earth station transmission power control system for keeping an EIRP of down link signals constant irrespective of weather
Buy PDF- 11pp US4599619  1986-07 Keigler et al.  RCA Corporation Satellite dual antenna pointing system
Buy PDF- 9pp US4630058  1986-12 Brown  RCA Corporation Satellite communication system
Buy PDF- 35pp US4901307  1990-02 Gilhousen et al.  Qualcomm, Inc. Spread spectrum multiple access communication system using satellite or terrestrial repeaters
Buy PDF- 7pp US4910524  1990-03 Young et al.  British Aerospace plc Investigating and controlling the pointing direction of an antenna on board a spacecraft
Buy PDF- 17pp US4910792  1990-03 Takahata et al.  Kokusai Denshin Denwa Co., Ltd. Up-link power control in satellite communications system
Buy PDF- 18pp US5010317  1991-04 Schwendeman et al.  Motorola, Inc. Satellite based simulcast paging system
Buy PDF- 14pp US5070338  1991-12 Cohen  General Electric Company Doppler determination of satellite attitude
Buy PDF- 12pp US5073900  1991-12 Mallinckrodt   Integrated cellular communications system
Buy PDF- 9pp US5081703  1992-01 Lee  Pactel Corporation Satellite mobile communication system for rural service areas
Buy PDF- 16pp US5109390  1992-04 Gilhousen et al.  Qualcomm Incorporated Diversity receiver in a CDMA cellular telephone system
Buy PDF- 12pp US5119225  1992-06 Grant et al.  British Aerospace Public Limited Company Multiple access communication system
Buy PDF- 18pp US5216427  1993-06 Yan et al.  California Institute of Technology Land-mobile satellite communication system
Buy PDF- 13pp US5233626  1993-08 Ames  Space Systems/Loral Inc. Repeater diversity spread spectrum communication system
Buy PDF- 15pp US5239671  1993-08 Linquist et al.  Pagemart, Inc. Simulcast satellite paging system with provision for signal interruption
Buy PDF- 42pp US5303286  1994-04 Wiedeman  Space Systems/Loral, Inc. Wireless telephone/satellite roaming system
Buy PDF- 16pp US5339330  1994-08 Mallinckrodt  Otten; David D. Integrated cellular communications system
Buy PDF- 11pp US5410728  1995-04 Bertiger et al.  Motorola, Inc. Satellite cellular telephone and data communication system
Buy PDF- 34pp US5415368  1995-05 Horstein et al.  TRW Inc. Medium-earth-altitude satellite-based cellular telecommunications
Buy PDF- 15pp US5422647  1995-06 Hirshfield et al.  Space Systems/Loral, Inc. Mobile communication satellite payload
Buy PDF- 11pp US5433726  1995-07 Horstein et al.  TRW Inc. Medium-earth-altitude satellite-based cellular telecommunications system
Buy PDF- 34pp US5439190  1995-08 Horstein et al.  TRW Inc. Medium-earth-altitude satellite-based cellular telecommunications
Buy PDF- 17pp US5446756  1995-08 Mallinckrodt  Celsat America, Inc. Integrated cellular communications system
Buy PDF- 38pp US5448623  1995-09 Wiedeman et al.  Space Systems/Loral, Inc. Satellite telecommunications system using network coordinating gateways operative with a terrestrial communication system
Buy PDF- 25pp USRE32905  1989-04 Baran  Equatorial Communications Company Satellite communications system and apparatus
Buy PDF- 25pp USRE32905B1  1989-04 Baran  Equatorial Communications Company Satellite communications system and apparatus
       
Foreign References:
Buy
PDF		 Publication Date IPC Code Assignee   Title
Buy PDF- 2pp EP0421698A3 1991-10  H04B 7/185 MOTOROLA, INC. Method of predicting cell-to-cell hand-offs for a satellite cellular communications system 
Buy PDF- 38pp WO9013186 1990-11  G01S 5/00 GEOSTAR CORPORATION COMMUNICATION SYSTEM EMPLOYING MULTIPLE RELAY SATELLITES OPERATING ON COMMON DOWNLINK FREQUENCY 
Buy PDF- 47pp WO9109473 1991-06  H04B 7/185 MOTOROLA INC SATELLITE BASED ACKNOWLEDGE-BACK PAGING SYSTEM 


Other Abstract Info: DERABS G1997-157315

Other References:
  • Petition of American Mobile Satellite Corporation Before the FCC, Washington, DC 20554, dated Jun. 3, 1991, pp. 1-15.
  • Application of Motorola Satellite Communications, Inc. for IRIDIUM A Low Earth Orbit Mobile Satellite System before the FCC, Washington, D.C. Dec. 1990, pp. 49-96.
  • Before the FCC, Washington, D.C. 20554, Aries Constellation Low Earth Orbit Satellite System Proposal of Constellation Communications, Inc. Jun. 3, 1991, Appendix A, B, and C.
  • Application of TRW Inc. for Authority to Construct a New Communications Satellite System Odyssey.SM. before the FCC, Washington, D.C. 20554, May 31, 1991 pp. 33-51.
  • Application of Ellipsat Corporation ELLIPSAT for the Authority to Construct Ellipso® 1 An Elliptical Orbit Satellite System, before the FCC, Washington, D.C. 20554, Nov. 2, 1990, pp. 5-34.
  • Application of Loral Cellular Systems, Corp., Globalstar Mobile COmmunications Wherever You Are, before the FCC, Washington, D.C. Jun. 3, 1991, pp. 94-187.
  • "An Integrated Satellite-Cellular Land Mobile System for Europe", E. Del Re, University of Florence, Dept. of Electronics Engineering, italy, Sep. 21, 1989.
  • "Current and Future Mobile Satellite Communication Systems", S. Kato et al., IEICE Transactions, vol. E 74, No. 8 Aug. 1991, pp. 2201-2210. (10 pages) Cited by 47 patents [ISI abstract]
  • "Digital Network Oriented Mobile Radio Satellite System as an Intregrated Part of The GSM Cellular Radio System in Europe", P. Dondl, Deutsch BUndespost/Fernmeldetechniches Zentralmt/Darmstadt, Sep. 21, 1989 Fed. Rep. Germ.
  • "The OmniTRACS® Mobile Satellite Communications and Positioning System", E. Tiedemann, Jr. et al., Vehicle Electronics in the 90's: Proceedings of the In'l. Congress on Transporation Electronics, Oct. 1990.
  • "Software Implementation of a PN Spread Spectrum Receiver to Accommodate Dynamics", C. Cahn et al., IEEE Trans. on Comm., vol. COM-25, No. 8, Aug. 1977.
  • "A Communication Technique for Multipath Channels", R. Price, Proceedings of the IR, Mar. 1958, pp. 555-570.
  • "Increased Capacity Using CDMA for Mobile Satellite Communication", K. Gilhousen et al., IEEE Journal on Selected Areas in Communications, vol. 8, No. 4, May 1990, pp. 503-514. (12 pages) Cited by 54 patents
  • "The Iridium .TM.1 System--A Revolutionary Satellite Communications System Developed with Innovative Applications of Technology", D. Sterling et al., IEEE, MILCOM 1991, Nov. 4-7.
  • "Iridium: Key to Worldwide Cellular Communications", J. Foley, Telecommunications, Oct. 1991, pp. 23-28.


    • Inquire Regarding Licensing

    Powered by Verity
    Plaques from Patent Awards      Gallery of Obscure PatentsNominate this for the Gallery...

    Thomson Reuters Copyright © 1997-2010 Thomson Reuters 
    Subscriptions  |  Web Seminars  |  Privacy  |  Terms & Conditions  |  Site Map  |  Contact Us  |  Help