on the North end of the Atoll. At mid-island the radiation was measured to be . The southern tip received a very small amount of radiation, due to the easterly winds. Out of the eight Programs listed, DOD-affiliated Projects 1.4, 1.7, 1.8, 1.9, 1.12, 2.8, 3.2, 5.2, 5.3, 6.4, 6.5 and 6.6 involved the Cactus test. One of the goals of this test was to study the physical characteristics of the crater and the surrounding area pre- and post-detonation associated with Project 1.4. A camera was mounted to a RB-50 aircraft and the resultant crater was mapped using photogrammetry. Measurements were taken from down to ground zero for both pre- and post detonation. Survey measurements of the Cactus test could not be made until the resultant radiation amounts had lowered to safer levels. Along with photogrammetric radial measurements, Airblast measurements were also recorded near surface zero for Cactus in accordance with Project 1.7. Similar to Project 1.8, Project 1.9 sought to determine transmission of blast pressure through the ground soil. Forty-three drums were buried at varying depths from ground zero of the Cactus detonation. Individuals from the Air Force Ballistic Missile Division—TRW Space Technologies Laboratory sought to the Shock Spectra Studies of Project 1.12. Measurement gauges were located between from the blast site. Fallout measurements and samples were taken by aircraft in the aftermath of the detonation, as part of Project 2.8. These surveys were designed in part to determine the impact of specific radionuclides to overall nuclear fallout. Samples were taken early post-blast using a new rocket sampler, the UCRL, which were then followed by B-57D and WB-50 aircraft. Between four and twenty-four hours post-detonation, the WB-50 collected several samples at in altitude. Project 3.2 involved structural tests of corrugated steel arches. One of these arches was placed away from the Cactus blast site. Eight days after the test, a crew of 13 men were allowed near the surface zero in order to extract the arch. The extraction took around twelve hours, and the radioactivity levels reached a maximum at during this time. Project 5.2 sought to determine the effects of the blast on two A4D-1 aircraft, both in thermal radiation and pressure. Nine film badges were placed throughout each aircraft in order to measure radiation. The Gamma dosimeter worn by the pilot in aircraft 827 indicated a neutron exposure level of . There is not information available for