"Gravitational fields." . . "Tethered satellites." . . "Analysis (Mathematics)" . . . . . . . . . . . "Analytical investigation of the dynamics of tethered constellations in Earth orbit (phase II) quarterly report # 1, for the period 22 February 1985 to 21 June 1985"@en . . . . . . . . . "Analytical investigation of the dynamics of tethered constellations in Earth orbit (phase II) quarterly report # 1, for the period period 22 February 1985 through 21 June 1985"@en . . . . "Calculus." . . "Equatorial orbits." . . "Three body problem." . . "Stationkeeping." . . . . "Earth orbits." . .