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Keeping a spacecraft on the sun-earth line
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Roithmayr, Carlos M. Kay-Bunnell, Linda |
| Copyright Year | 2005 |
| Description | Measurements of Earth's atmosphere as it occults sunlight can be obtained advantageously from a spacecraft placed in the proximity of the Sun-Earth Lagrange point L2. Maintaining the condition of continuous solar occultation by all parts of the atmospheric disk requires that the displacement of the spacecraft perpendicular to the Sun-Earth line remains less than 200 km. However, the gravitational force exerted by the Earth s moon must be negated by propulsion in order to meet this rather tight constraint. We provide an estimate of propulsive force needed to keep the spacecraft coincident with L2, as well as estimates of velocity increments needed to maintain various trajectories in the close vicinity of L2. |
| File Size | 576928 |
| Page Count | 22 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20110010967 |
| Archival Resource Key | ark:/13960/t1xd5vj4x |
| Language | English |
| Publisher Date | 2005-04-01 |
| Access Restriction | Open |
| Subject Keyword | Astrodynamics Lunar Spacecraft Time Dependence Solar Gravitation Eccentric Orbits Lagrange Coordinates Lissajous Figures Librational Motion Collinearity Earth-moon System Perturbation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
