How can we say that a beam being received is horizontally polarized or vertically polarized on reception at a satellite..what will be the plane of reference? Is there any other method to measure plane of polarization.
2007-06-13 08:37:57 · 2 answers · asked by ram 1 in Science & Mathematics ➔ Astronomy & Space
E-wave parallel with the equator = 0 degrees: horizontal polarization.
E-wave parallel with the local longitudnal line = 90 degrees: vertical polarization.
E-wave in a time-varying rotating pattern from 0 degrees, to 90, to 180, to 270, back to 360 (0 degrees) = circular polarization.
One problem with fixed polarization is that it may start vertically from the satellite, but once the signal hits the atmosphere it will not arrive on the ground vertically polarized. That's why they use circular polarization, because the signal will get circularly polarized by the ionosphere, anyway.
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2007-06-13 10:38:04 · answer #1 · answered by tlbs101 7 · 0⤊ 0⤋
By the angle of degrees.
Closer to 90 degrees, we say its vertically and when its closer to 180 degrees, its called horizontal.
Its based on the angle the satellite is in the sky and its inclination to us
2007-06-13 10:00:47 · answer #2 · answered by Ryan C 2 · 0⤊ 0⤋