Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aiaa.meetq....m&link_type=abstract
AIAA, Aerospace Sciences Meeting, 25th, Reno, NV, Jan. 12-15, 1987. 14 p.
Astronomy and Astrophysics
Astronomy
Astronomical Observatories, Extrasolar Planets, Planetary Systems, Planetology, Space Stations, Spaceborne Astronomy, Stars, Constraints, Pointing Control Systems, Slewing, Star Distribution, Telescopes, View Effects
Scientific paper
A 10-20-yr star-observation program for the Space Station Astrometric Telescope Facility (ATF) is proposed and evaluated by means of computer simulations. The primary aim of the program is to detect stars with planetary systems by precise determination of their motion relative to reference stars. The designs proposed for the ATF are described and illustrated; the basic parameters of the 127 stars selected for the program are listed in a table; spacecraft and science constraints, telescope slewing rates, and the possibility of limiting the program sample to stars near the Galactic equator are discussed; and the effects of these constraints are investigated by simulating 1 yr of ATF operation. Viewing all sky regions, the ATF would have 81-percent active viewing time, observing each star about 200 times (56 h) per yr; only small decrements in this performance would result from limiting the viewing field.
Jorgensen Helen
Mascy Alfred C.
Nishioka Ken
Swenson Byron L.
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