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1. Immediately before a launching, skilled technicians check every piece of gear to make sure it is in perfect condition. 2. From the moment a missile like the Snark, shown here, is fired, its flight is recorded by optical and electronic devices. Tracking Long-Range Missiles D, "evelopment of long-range missiles has become a top priority item in our national defense program, and has focused sharp attention on Patrick Air Force Base on the east coast of central Florida. There the giant "birds" like the Snark, Navaho, Redstone and Bomarc are tested under the supervision of the Air Research and Development Command. From a scrub-covered launching area on Cape Canaveral, the missiles are fired out over the Atlantic Ocean. They are "tracked" by camera, radar, telemetry and other means along the range of islands shown on the map below, a range that will eventually be in full operation for 5,000 miles from Florida to lonely Ascension Island. The RCA Service Company, under sub-contract to Pan American World Airways, Inc., has responsibility for the all-important technical aspects of range operations. RCA experts plan, engineer, install, maintain and operate the electronic and optical equipment used for tracking. A single missile flight may produce as much as 50,000 feet of photographic film and more than 100,000 feet of magnetic and punched tape. Electronic devices inside the missile itself, known as telemetry devices, radio to the ground vital information about performance. On some missile flights, telemetry alone has furnished more than 400 separate pieces of information. The data recorded by the various electronic and photographic devices cover every aspect of the missile's performance — speed, altitude at various stages, rate of climb, fuel consumption, and other factors. Once a test flight has been completed, this vast bulk of data is processed by mathematicians and machines. The end product is a Flight Test Report of fifty to 100 pages telling how well the missile's guidance system, engine and other equipment functioned. This report is turned over to the missile manufacturer. Engineers analyze it and decide what changes to make in the missile's design. The techniques developed for gathering and processing missile test data will be used in the Vanguard Project to track the earth satellite when it is launched from Cape Canaveral some time after next July 1. Pictures on this and the opposite page show step-by-step the various aspects of the tracking operation.