Title page for ETD etd-03302010-020248
|Type of Document
||Eisemann, David W.
||Methods for determining dish antenna pointing angles
||Master of Science
|Ricci, Fred J.
|Date of Defense
Satellite Look Angles are the coordinates to which an earth
station antenna must point to communicate with a satellite. Each
satellite has it's own unique set of look angles. The first method,
developed to calculate a satellite's look angles, uses standard plane
and spherical trigonometry and assumes a perfectly spherical earth. The
second method developed is unique to this paper and wi11 not be found
anywhere, including general satellite communication textbooks. This
method uses a geodetic reference system which refers to the earth as an
ellipsoid rather than a sphere. This second method is a more rigorous
approach to determining look angles and readily lends itself to pointing
at satellites in any given orbit. Fortran code was written implementing
both methods and it is concluded that employing a geodetic reference
frame is viable where high degrees of accuracy are required. Fortran
code was also developed to calculate the pointing angles for Radio
Sources such as pulsars and quasars. This code corrects for precession,
nutation, annual aberration, and polar motion of the earth.
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