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Publication numberUST100604 I4
Publication typeGrant
Publication dateMay 5, 1981
Filing dateJan 29, 1979
Publication numberUS T100604 I4, US T100604I4, US-I4-T100604, UST100604 I4, UST100604I4
InventorsPhilip D. Crill, Shel Kulick
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method of placing a spacecraft into final earth orbit or earth escape trajectory
US T100604 I4
Abstract
The method of placing a spacecraft having on-board propulsion devices with self-start capabilities into a series of successively higher transfer orbits to attain from a low earth orbit a final earth orbit or earth escape trajectory. Incremental thrusting impulses limited to a thrusting level at which the acceleration of the spacecraft is more than 0.01 g at beginning of thrusting, but is no more than 0.3 g at termination of thrusting are applied to the spacecraft. The propulsion propellant is ignited upon the near completion of each orbit at the perigee altitude, the latter being substantially common to all of the transfer orbits. The duration of each propellant burn is selectively varied during the transit from one transfer orbit to the next higher orbit and results in the spacecraft being propelled into successively higher energy orbits or trajectories until the desired orbit or escape trajectory is attained. The self-start capability of the spacecraft permits it to be parked in any transfer orbit to permit checkout of its equipment and recapture if a malfunction is detected.
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5152482 *Jun 29, 1990Oct 6, 1992Standard Space Platforms Corp.Modular mother satellite bus for subsidiary payloads
US5271582 *May 1, 1992Dec 21, 1993Standard Space Platforms Corp.Modular mother satellite bus for subsidiary payloads
US6059233 *Dec 30, 1997May 9, 2000Societe Nationale D'etude Et De Construction De Moteurs D'aviationMethod and a system for launching satellites on non-coplanar orbits, making the use of gravitational assistance from the moon
US6097997 *May 6, 1999Aug 1, 2000Galaxy Development, LlcLow energy method for changing the inclinations of orbiting satellites using weak stability boundaries and a computer process for implementing same
US6253124May 7, 1999Jun 26, 2001Galaxy DevelopmentLow energy method for changing the inclinations of orbiting satellites using weak stability boundaries and a computer process for implementing same
US6278946Mar 29, 1999Aug 21, 2001Galaxy Development, LlcProcedure for generating operational ballistic capture transfer using computer implemented process
US6341250Jul 7, 2000Jan 22, 2002Galaxy Development, LlcLow energy method for changing the inclinations of orbiting satellites using weak stability boundaries and a computer process for implementing same
US6385512Apr 14, 2000May 7, 2002Galaxy Development LlcSystem and method of a ballistic capture transfer to L4, L5
US6442482Jul 27, 2001Aug 27, 2002Galaxy Development, LlcProcedure for generating operational ballistic capture transfer using a computer implemented process
US6577930May 7, 2001Jun 10, 2003Galaxy Development, LlcLow energy method for changing the inclinations of orbiting satellites using weak stability boundaries and a computer process for implementing same
US6751531Apr 10, 2003Jun 15, 2004Galaxy Development, LlcLow energy method for changing the inclinations of orbiting satellites using weak stability boundaries and a computer process for implementing same
US6999860Mar 22, 2004Feb 14, 2006Galaxy Development, LlcLow energy method for changing the inclinations of orbiting satellites using weak stability boundaries and a computer process for implementing same
US7113851 *Jun 9, 1999Sep 26, 2006Walter GelonPractical orbit raising system and method for geosynchronous satellites
EP0409721A1 *Jul 17, 1990Jan 23, 1991Centre National D'etudes SpatialesSatellite and method of bringing into orbit by gravitational assistance
Classifications
U.S. Classification244/158.5
International ClassificationB64G1/40, B64G1/24, B64G1/00
Cooperative ClassificationB64G1/007, B64G1/242, B64G1/405, B64G1/406, B64G2700/00
European ClassificationB64G1/00A2