Tilt for offset dish on polar mount

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adrian

SatelliteGuys Family
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Jan 23, 2006
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For mounting an offset dish on to a polar mount, can the tilt adjustment be ignored?
Also,i assume that it is of paramount importance that ones latitude is correct to track the Clarke belt spot on.
 
If you mean declination >>For mounting an offset dish on to a polar mount, can the tilt adjustment be ignored? << No.
Prime focus, Dish face angle is the polar axis angle + declination angle.
Offset dish face is offset angle + declination + polar axis angle.
>>Also,i assume that it is of paramount importance that ones latitude is correct to track the Clarke belt spot on.<<
Without knowing it, and setting it accurately, tracking the arc would be impossible (or at least a very long process of trial and error)
 
The amount of declination, which changes depending on latitude. This is accomplished differently with different setups; IE: 36" Ku w/Diseq 1.2/3 or C/KU w/actuator. The elevation of the dish setting changes the amount enough that declination is achieved! The measurement is acquired at the dish plate compared to the pivot point of the motor's turning device; which then makes the signal work correctly. Setting of the dish elevation as declination (because it cannot move too far) is a low number and will not move too far off (some move only 3-7 degree's).

At the equator, declination is zero (0). San Diego, CA 5.1 Washington to Alaska -> 6.0 - 8.0. If you aim at the highest satellite in the arc which is due south; it is required you set this number on the mount (with directions of motor); compared to the elevation setting, which is also important; so that the dish tracks all satellites. What the use of declination does is skew the dish as it moves; and sets track of all satellites.
 
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