Searching for Arecibo. Bob Zimmerman

Aug 18, 01:17 AM
Photo: A detailed view of the beam-steering mechanism and some antennas. The triangular platform at the top is fixed, and the azimuth arm rotates beneath it. To the left is the Gregorian sub-reflector, and to the right is the 96-foot-long (29 m) line feed tuned to 430 MHz. Just visible at the upper right is part of the rectangular waveguide that brings the 2.5 MW 430 MHz radar transmitter's signal up to the focal region.
Alessandro Cai (OliverZena) - own work

Closeup of the feed antenna of the Arecibo Radio Telescope, at Arecibo, Puerto Rico. The dish reflector of the telescope is built into a valley in the landscape, and the feed antenna is suspended by cables above it. Since the reflector can't be moved, the telescope is steered to point at different regions of the sky by moving the feed antenna (in bell shaped dome) along on a curving track. The dome shields the feed antenna from interfering radio signals.

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  • File:Arecibo Observatory Aerial.jpg
  • Created: 31 December 2005