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Timothy Cichan Phones & Addresses

  • Lone Tree, CO
  • 9381 Cove Creek Dr, Littleton, CO 80129
  • 7345 Grant Ranch Blvd, Littleton, CO 80123
  • Highlands Ranch, CO
  • 1890 Turk Rd, Doylestown, PA 18901
  • 120 Washington Ave, Newtown, PA 18940
  • Philadelphia, PA
  • Eagleville, PA
  • State College, PA

Publications

Us Patents

Stationkeeping Optimization For Inclined Elliptical Satellite Orbit Constellations

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US Patent:
7720604, May 18, 2010
Filed:
May 30, 2006
Appl. No.:
11/442332
Inventors:
Timothy Cichan - Doylestown PA, US
Mary K. Johnson - Santa Clara CA, US
Assignee:
Lockheed Martin Corporation - Bethesda MD
International Classification:
G01C 21/00
G06F 17/10
US Classification:
701226, 2441584
Abstract:
A satellite constellation optimized for stationkeeping fuel consumption is provided. The satellite constellation includes a plurality of satellites, each satellite having a corresponding inclined elliptical orbit, each orbit having an initial right ascension of ascending node (“RAAN”) value, a RAAN drift rate, a semi-major axis, an eccentricity, an argument of perigee and an inclination. Each satellite has a fuel consumption value required to maintain the RAAN drift rate, the semi-major axis, the eccentricity, the argument of perigee and the inclination of the corresponding orbit. The initial RAAN value and the RAAN drift rate for each orbit correspond to a minimized fuel consumption value for the satellite having the highest fuel consumption value. The initial RAAN value and RAAN drift rate may be determined by calculating, for each possible data combination of an initial RAAN value for each orbit and a RAAN drift rate for the constellation, a fuel consumption value for each satellite in the constellation, and selecting, from the fuel consumption values thus determined, the data combination corresponding to a lowest fuel consumption for a highest fuel-consuming satellite.
Timothy Cichan from Lone Tree, CO, age ~44 Get Report