Arecibo 2380 MHz Radar Receiver
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The Arecibo Planetary Radar Receiver is a single-pixel dual-circular-polarization radio feed with cooled HEMT first stage amplifiers and a system temperature of 20-30K depending on pointing. It is operated with a 100 MHz filter centered at 2380 MHz and is designed to be part of the Arecibo Planetary Radar System. The first filter is switchable to 2290 MHz for receiving spacecraft communications.