Fully manned weather and fallout prediction units are an oe Ae conetees ee integral part of the Task Force conducting the tests. Since the larger detonations in the Pacific require additional information on the upper air, new types of high altitude balloons and missiles are used. Nine weather stations are established by the Task Force during the test i” series on islands around the Site, in addition to the eight regular | weather stations in operation on other islands. After each detonation, aircraft track the radioactive air out for several hundred miles. Other aircraft, with special monitoring equipment fly over land and sea areas to measure any residual contamination. Through the cooperation of the U. S. Public Health Service, trained monitors were present during Operation Redwing (Spring 1956 series) on the populated Islands of Wotho, Ujelang and Utirik. As would be expected, the delineation of fallout patterns in the wide expanses of the Pacific is difficult. For the immediate monitor~— ing, aerial surveys are conducted as mentioned above, automatic equipment are placed on land areas, and a variety of ships, skiffs, and buoys are utilized. Following each test series, large scale radiological and biological surveys are made. Data from these surveys have been summarized by the Commission in a document soon to be published by the Government Printing Office. The Nevada Test Site covers an area of about 600 square miles, with the adjacent 4,000 square miles being a U. S. Air Force Gunnery range .~4 land. Surrounding these areas are wide exparses of sparsely populated For general safety, as well as security, the Nevada Test Site “is ~ %-