A microwave relay antenna, which transmits data such as long-distance telephone calls and data between cities on beams of microwaves. The pairs of parabolic antennas are pointed at another relay station in line-of-sight range, within 30-40 miles, which passes the data on. The two separated antennas used for each link may be for space diversity; to prevent fading of the signal due to transmission difficulties in one transmission path; if the signal received by one dish is weak it may be strong at the other dish. The mouths of the "dish" antennas are covered by protective plastic radomes to keep out precipitation.}} Please credit the photographer, David Jordan, when using this image.