Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Low energy method for changing the inclinations of orbiting satellites using weak stability boundaries and a computer process for implementing same










Image Number 13 for United States Patent #6341250.

When a satellite is orbiting the earth in an elliptic orbit, it has a certain inclination with respect to the earth's equator. The usual way to change the inclination is perform a maneuver by firing the rocket engines at the periapsis of the ellipse. This then forces the satellite into the desired inclination. There is a substantially more fuel efficient way to change the inclination. This is done by an indirect route by first doing a maneuver to bring the satellite to the moon on a BCT (Ballistic Capture Transfer). At the moon, the satellite is in the so called fuzzy boundary or weak stability boundary. A negligibly small maneuver can then bring it back to the earth on a reverse BCT to the desired earth inclination. Another maneuver puts it into the new ellipse at the earth. In the case of satellites launched from Vandenberg AFB into LEO in a circular orbit of an altitude of 700 km with an inclination of 34.degree., approximately 6 km/s is required to change the inclination to 90.degree.. This yields a savings of approximately 13% in Delta-V as compared to the standard approach which could translate into a significant increase of payload or perhaps a smaller launch vehicle. This may have applications to commercial satellite launches for the Iridium or Teledesic networks and others.








 
 
  Recently Added Patents
Reovirus for the treatment of cellular proliferative disorders
Beverage container lid
Floor standing rack
Permitting access of slave device from master device based on process ID's
Method of creating animatable digital clone from multi-view images
Traveling vehicle system and self-diagnosis method for the traveling vehicle system
Identification of biomarkers in biological samples and methods of using same
  Randomly Featured Patents
Rigid panel folding shower door assembly having improved horizontal track and method for making the same
Low viscosity noncrystalline dicyanate ester blends with prepolymers of dicyanate esters
System for energy efficient computer management environment via tightly integrated target status and directed work sessions
Tilting hood ventilator
Gas generator
Series-connected control system
Tracking solar shelter
Drilling tool for producing an undercut bore
Safety guard system for machine having a ram
Inhibitors of protein tyrosine kinase activity