Word: radar
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Anthony Barringer, a Canadian geophysicist, is unbothered by Soviet se crecy. At a symposium on remote sensing in Huntsville, Ala., last week, he theorized that Luna 7's radar may have failed to "see" a top porous layer of the moon's crust. As a result, the space ship crashed on its way to a landing on the hard lunar rock below...
...difference between success and failure, Barringer decided, could have been caused by an altimeter error of as little as 30 ft. - which some scientists believe is the approximate depth of a layer of porous rock or partially compacted dust that covers the moon. Barringer's conclusion: Russian radar penetrated the moon's top layer, reflected back from the bedrock below and reported an incorrect altitude...
Then, 143 miles high and 541.9 miles downrange over the Atlantic, the Agena suddenly went silent. At the Houston control center, flight directors hunted desperately for their missing spacecraft, still hoping that there might be something in orbit for a Gemini rendezvous. But after a futile radar hunt, a technician at the Carnavon tracking station in Australia announced the end by moaning...
Along with the fighter-bombers goes a covey of other craft: jammers to knock out the enemy's radar, flying command and communications posts, planes whose radar sweeps the sky for signs of attacking Communist aircraft. RF-101 photo-reconnaissance planes dive into the smoke to film the raid's damage for analysis back home, using strobelike parachute flares at night. Backing the raids also are the planes and helicopters of the Air Rescue Service, ready to pluck a downed airman out of the enemy heartland...
...solid bar of fire," explains a U.S. officer, "and the noise is a terrible roar." The Lightning Bug is a UH-1B helicopter fitted with seven brilliant landing lights. It goes sampan hunting at night along Viet Cong rivers or canals. Antipeople peepers include Tipsy 33, a ground-surveillance radar first used by the marines along their Danang perimeter. By the end of this year, a steel-mesh net platform that can be laid by helicopters across jungle treetops will be in use by choppers as a do-it-yourself landing pad; the disgorged troops shinny down through the branches...