Originally posted by Miscue
Glass and vinyl does not effect the signal as much as metal but satellites are not always directly above. The signal will still have to deal with the roof of the car most of the time.
Edit: I can't say if it will effect sat. radio but it surely does in GPS surveying situations. The slightest cover will make our GDOP jump to an unacceptable level. But I'm dealing with millimeters not sound quality.



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