Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987tdar.nasa..133k&link_type=abstract
In its The Telecommunications and Data Acquisition Report p 133-140 (SEE N88-12679 04-32)
Astronomy and Astrophysics
Astronomy
Astronomical Observatories, Mars (Planet), Optical Communication, Solar Radiation Shielding, Umbras, Angular Velocity, Planetary Orbits, Revolving, Shadows, Spaceborne Telescopes, Tetherlines
Scientific paper
The umbra of a planet may serve as a sun shield for a space based optical communications terminal or for a space based astronomical observatory. An orbit that keeps the terminal or observatory within the umbra is desirable. There is a corevolution point behind every planet. A small body stabilized at the planet corevolution point will revolve about the sun at the same angular velocity as the planet, always keeping the planet between itself and the sun. This corevolution point is within the umbra of Mars but beyond the end of the umbra for Mercury, Venus, and earth. The Mars corevolution point is an ideal location for an astronomical observatory. There Mars obstruct less than 0.00024 percent of the sky at any time, and it shades the observatory completely from the sun. At the earth corevolution point, between 51 and 84 percent of the solar disk area is blocked, as is up to 92 percent of the sunlight. This provides a reduction from 3 dB to 11 dB in sunlight that could interfere with optical communications if scattered directly into the detectors. The variations is caused by revolution of the earth about the earth-moon barycenter.
No associations
LandOfFree
A near-earth optical communications terminal with a corevolving planetary sun shield 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 A near-earth optical communications terminal with a corevolving planetary sun shield, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A near-earth optical communications terminal with a corevolving planetary sun shield will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1716248