Calculation of double-lunar swingby trajectories: I. Keplerian foundation

Details Calculation of double-lunar swingby trajectories: I. Keplerian foundation Calculation of double-lunar swingby trajectories: I. Keplerian foundation

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989fmet.symp..367s&link_type=abstract

In NASA, Goddard Space Flight Center, Flight Mechanics/Estimation Theory Symposium, 1989 p 367-379 (SEE N90-13413 05-13)

Physics

Earth-Moon Trajectories, Kepler Laws, Orbital Mechanics, Spacecraft Trajectories, Swingby Technique, Alignment, Parameterization, Transfer Orbits

Scientific paper

Scientific satellites may require translunar orbits aligned with the Sun-Earth line, with most of the period spent in either the sunward or antisunward direction. To maintain alignment, the orbit's line of apsides must rotate at a rate equal to mean angular motion of the Earth about the Sun. To maintain this rotation of the line of apsides by use of fuel onboard the spacecraft is prohibitively expensive. Farquhar and Dunham proposed a method for maintaining the desired alignment by gaining momentum at the expense of the Moon during a close approach (a lunar swingby) as the spacecraft passes beyond lunar orbit, then returning the momentum at the second lunar swingby as the spacecraft returns within the lunar orbit. The cycle of double-lunar swingbys may then be repeated. Dunham presented the orbit parameters necessary to achieve double-lunar swingby orbits which will maintain Sun-Earth line alignment. The details of the Keplerian approach to calculation of these parameters are presented. Methods for solution of the necessary equations for these parameters are presented.

Affiliated with

Also associated with

No associations

Rating

Calculation of double-lunar swingby trajectories: I. Keplerian foundation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Calculation of double-lunar swingby trajectories: I. Keplerian foundation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Calculation of double-lunar swingby trajectories: I. Keplerian foundation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1528663