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Usage examples of antenna.

Photographs were taken of equipment suspected of being used for acoustical surveillance and of the antenna field and ionospheric laboratory that had likely been used for eavesdropping.

To quickly get intercepts from the ship to NSA, a unique sixteen-foot dish-shaped antenna was installed on its fantail.

Sailors immediately began setting up a huge dish antenna as well as an assortment of wires and poles.

A rotating switch allowed the intercept operators to choose the antenna that best received their target.

Midway was too small for a giant elephant-cage antenna, so instead they used vertical wires.

The problem for NSA was how to get an antenna and tape recorder into one of the most secret and heavily protected areas on earth.

Silhouetted against the rising sun was the large moon-bounce antenna on the rear deck, pointing straight up as if praying.

There were thin long-wire VLF antennas, conical electronic-countermeasure antennas, spiracle antennas, a microwave antenna on the bow, and whip antennas that extended thirty-five feet.

Most unusual was the sixteen-foot dish-shaped moon-bounce antenna that rested high on the stern.

As more and more antenna blades were stuck to its skin, the once-graceful U-2 was beginning to resemble a porcupine.

In the center, sitting on a tripod, would be the PRD-1, which was about eighteen inches square and crowned with a diamond-shaped antenna that could be rotated.

Or they would place their transmitting antenna up to a mile from the actual transmitter, in order to avoid fire.

Earlier, NSA had succeeded in intercepting a weak beacon transponder signal transmitted from a small spiral antenna on the tail of the Soviet SA-2 surface-to-air missile.

Arecibo dish would be a perfect antenna to capture Soviet signals as they drifted into space, bounced off the moon, and were reflected back to earth.

But Herzfeld later gave in, and NSA began using the antenna under the cover of conducting a study of lunar temperatures.