| 词条 | Statite |
| 释义 |
A statite (a portmanteau of static and satellite) is a hypothetical type of artificial satellite that employs a solar sail to continuously modify its orbit in ways that gravity alone would not allow. Typically, a statite would use the solar sail to "hover" in a location that would not otherwise be available as a stable geosynchronous orbit. Statites have been proposed that would remain in fixed locations high over Earth's poles, using reflected sunlight to counteract the gravity pulling them down. Statites might also employ their sails to change the shape or velocity of more conventional orbits, depending upon the purpose of the particular statite. The concept of the statite was invented independently (and approximately simultaneously) by Robert L. Forward[1] (who coined the term "statite"), and by Colin McInnes, who used the term "halo orbit"[2] (not to be confused with the type of halo orbit invented by Robert Farquhar). Subsequently, the terms "non-Keplerian orbit" and "artificial Lagrange point" have been used as a generalization of the above terms.{{clarify|date=April 2018}} No statites have been deployed to date, as solar sail technology is still in its infancy. NASA's cancelled Sunjammer solar sail mission had the stated objective of flying to an artificial Lagrange point near the Earth/Sun L1 point, to demonstrate the feasibility of the Geostorm geomagnetic storm warning mission concept proposed by NOAA's Patricia Mulligan.[3] See also
References1. ^{{Ref patent | country = US | number = 5183225 | status = patent | title = Statite: Spacecraft That Utilizes Light Pressure and Method of Use | gdate = 1993-02-02 | pridate = | inventor = Robert L. Forward | invent1 = Robert | invent2 = Forward | assign1 = | assign2 = | class = }} {{spacecraft-stub}}2. ^McInnes, C. R. and Simmons, J. F. L.: "Halo Orbits for Solar Sails --- Dynamics and Applications," ESA Journal, Vol. 13, 1989, pp.229-234 3. ^{{cite journal|last1=Mulligan|first1=Patricia|title=Solar Sails for the Operational Space Community|journal=Spaceviews|date=August 1998|volume=8|issue=3-4}} 2 : Spaceflight concepts|Astrodynamics |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。