I am installing multiple 11GHz Point-to-Point licensed microwave data links for a project in ITU Rain Region "E". I allowed for a composite fade margin of 20dB through use of 4-foot dishes over a path distance of 4.3 miles. The path is mostly over water. Antenna height is 50 feet at one end and 120 feet at the other with clear line-of-sight. Does shooting over water at 11GHz have any impact on link quality?