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Title: US5909299: Microsatellite system for high-volume orbital telemetry

Country:US United States of America

Inventor: Sheldon, Jr., L. Philip; Lancaster, PA 17601
Sheldon, Robert; Woburn, MA 01801

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11 pages

Assignee: None

Published / Filed: June 1, 1999 / April 28, 1997

Application Number: US1997000847931

IPC Code: H04B 10/00;

ECLA Code: B64G1/10D; B64G1/10M; B64G1/66; G01S17/74; H04B7/185D;

U.S. Class: Current: 359/172; 359/159;
Original: 359/172; 359/159;

Field of Search: 359/172,159,152,169,170,180,181

Priority Number:
April 28, 1997  US1997000847931

Abstract: Detailed mapping of the magnetosphere is made possible by deploying hundreds of attitude-impervious microsatellites, in the form of small corner reflectors with piezoelectric mirror surfaces, from a single mother satellite at spacings of as little as 1 km in equatorial and elliptical orbits. The microsatellites carry magnetosensors whose output is transmitted to a ground station by modulating the reflection of a laser beam transmitted to the microsatellite by the ground station. Various refinements of the laser data link are also disclosed.

Attorney, Agent or Firm: Coudert Brothers ;

Primary / Assistant Examiners: Bacares, Rafael;

INPADOC Legal Status: Show legal status actions

Designated Country: AL AM AP AT AZ BA BB BG BR BY CA CH CN CU CZ DE DK EA EE EP ES FI GB GE GH GM GW HU ID IL IS JP KE KG KP KR KZ LC LK 

Family:Show 6 known family members

First Claim: Show all 27 claims

What is claimed is:
    
1. A communication system for space-borne data devices, comprising:

  • a. a platform containing a laser beam source;
  • b. a data device spaced from said platform and containing a corner reflector receiving and reflecting a laser beam emanating from said source, and a source of data to be transmitted; and
  • c. a modulator on said data device arranged to transmit said data by varying the surface position of said corner reflector when reflecting said laser beam to modulate the amplitude, phase or frequency of said laser beam.


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U.S. References: Go to Result Set: All U.S. references   |  No patents reference this one   |   Backward references (4)   |   Citation Link

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Patent  Pub.Date  Inventor Assignee   Title
Buy PDF- 5pp US3863064  1975-01 Doyle et al.  Philco-Ford Corporation Differential retrocommunicator
Buy PDF- 7pp US5390040  1995-02 Mayeux  Martin Marietta Corporation Optical transceiver for free-space communication links
Buy PDF- 13pp US5450223  1995-09 Wagner et al.  Martin Marietta Corp. Optical demultiplexer for optical/RF signals
Buy PDF- 61pp US5486833  1996-01 Barrett   Active signalling systems
         
Foreign References:
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Publication Date IPC Code Assignee   Title
Buy PDF- 4pp EP0317374A2 1989-05  H04B 9/00 BRITISH AEROSPACE PUBLIC LIMITED COMPANY Laser beam communication between spacecraft 
  DE19940043254261 1994-09       


Other Abstract Info: DERABS G1998-610006

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