The rotation of a dish around its center point. Seen as a clockwise or counter-clockwise rotation when facing the front of the dish.
Skew is needed to align the antenna with the polarization of the satellite signal when the dish is not located on the same longitude as the satellite. When a dish is west of the satellite, the skew is a negative number, and from the front of the dish the left edge will be higher than the right. When the dish is east of the satellite it will have a positive skew, with the left edge lower than the right edge.
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