IP Library Granted Patent US 8,800,932
Granted Patent B2
US 8,800,932 · App. 12/843,417 · Granted Aug 12, 2014

Medium earth orbit constellation with simple satellite network topology

Inventors: Xiangdong Liu (Boyds, MD); Joshua Schachter (Dallas, TX)
Assignee: Lockheed Martin Corporation
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Quick Facts
Patent No.
US 8,800,932
App. No.
12/843,417
Granted
Aug 12, 2014
Kind
B2
Abstract

A method, a member satellite, and a tangible machine-readable medium are disclosed. An inter-satellite link subsystem 472 may maintain a fixed communication link between the member satellite and a partner satellite of the medium earth orbit centric satellite constellation in a regular, wraparound symmetric, spatially dimensional network. A terrestrial linking subsystem 476 may create a terrestrial link to a ground terminal.

Claims (32)

1. A method, comprising:

maintaining a substantially constant communication link directly between a member satellite of a medium earth orbit centric satellite constellation and a partner satellite of the medium earth orbit centric satellite constellation via an inter-satellite link in a regular, wraparound symmetric, spatially dimensional network; and

establishing a terrestrial link to a ground terminal.

2. The method of claim 1 , wherein the medium earth orbit centric satellite constellation consists of sixteen satellites.

3. The method of claim 2 , wherein the medium earth orbit centric satellite constellation is arranged in a four satellites by four orbital paths constellation.

4. The method of claim 1 , further comprising:

linking the member satellite directly to four partner satellites in the medium earth orbit centric satellite constellation.

5. The method of claim 1 , further comprising:

linking the member satellite directly to six partner satellites in the medium earth orbit centric satellite constellation.

6. The method of claim 1 , wherein the member satellite is in an orbital path with a 67.5 degree phase offset from an adjacent orbital path.

7. The method of claim 6 , further comprising:

adjusting a position of the member satellite to maintain the 67.5 degree offset.

8. The method of claim 1 , further comprising:

sending an alert directly from the member satellite to the partner satellite of a handover of the terrestrial link.

9. A member satellite of a medium earth orbit centric satellite constellation, comprising:

an inter-satellite link subsystem that maintains a substantially constant communication link directly between the member satellite and a partner satellite of the medium earth orbit centric satellite constellation in a regular, wraparound symmetric, spatially dimensional network; and

a terrestrial linking subsystem that establishes a terrestrial link to a ground terminal.

10. The member satellite of claim 9 , wherein the medium earth orbit centric satellite constellation consists of sixteen satellites.

11. The member satellite of claim 10 , wherein the medium earth orbit centric satellite constellation is arranged in a four satellites by four orbital paths constellation.

12. The member satellite of claim 9 , wherein the inter-satellite link subsystem links the member satellite directly to four partner satellites in the medium earth orbit centric satellite constellation.

13. The member satellite of claim 9 , wherein the inter-satellite link subsystem links the member satellite directly to six partner satellites in the medium earth orbit centric satellite constellation.

14. The member satellite of claim 9 , wherein the member satellite is in a 56 degree inclined orbital path.

15. The member satellite of claim 14 , further comprising:

an altitude and orbital control subsystem that adjusts a trajectory of the member satellite to maintain the 56 degree inclined orbital path.

16. The member satellite of claim 9 , wherein the inter-satellite link subsystem sends an alert directly to the partner satellite of a handover of the terrestrial link.

17. A non-transitory tangible machine-readable medium having a set of instructions stored thereon that, when executed by one or more processors, cause the one or more processors to perform a method comprising:

maintaining a substantially constant communication link directly between a member satellite of a medium earth orbit centric satellite constellation and a partner satellite of the medium earth orbit centric satellite constellation via an inter-satellite link in regular, wraparound symmetric, spatially dimensional network; and

establishing a terrestrial link to a ground terminal.

18. The non-transitory tangible machine-readable medium of claim 17 , wherein the medium earth orbit centric satellite constellation consists of sixteen satellites arranged in four satellites by four orbital paths.

19. The non-transitory tangible machine-readable medium of claim 17 , the method further comprising:

linking the member satellite directly to four partner satellites in the medium earth orbit centric satellite constellation.

20. The non-transitory tangible machine-readable medium of claim 17 , wherein the member satellite is in a 56 degree inclined orbital path with a 67.5 degree phase offset from an adjacent orbital path.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 26, 2010
From: LIU, XIANGDONG; SCHACHTER, JOSHUA
To: LOCKHEED MARTIN CORPORATION
Reel/Frame 024740/0411 →
Continuity (1)
Related Publication 20120018585A1 · Jan 26, 2012