| (semtnozz) DELETED. Project 1.8 - Crater Measurements - F. FE. Deeds OBJECTIVE The objective of this project is to obtain measurements 0: the physical characteristics (radius, depth and average profil of the crater produced by the detonation of atomic weapons at the surface of the ground. INSTRUMENTATION OR TECHNIQUES Preshot Survey: Rays extending from ground zero and 60 4 apart were surveyed to a distance greater than any expected cer radius, The elevations ranged from 2 to 11 feet above the dat plane (6 inches below mean low water springs) with the greater of them being about 7 feet. Uncontrollei stereoptic aerial pho were taken of the shot area. Postshot Survey: Aerial photographs were taken in order - the diameter of the crater could be measured by the use of ste equipment, At H #1 one pass was made at an altitude of 1350 feet. of a malfunction of the camera no further runs were made that D ¥ 1 three other passes were made at altitudes of 1495, 1475, feet. A requirement for making lead line soundings along thre (with a minimum of ten soundings each) has been placed with Ho Narver. RESULTS The postshot aerial photographs were studied and it was f the crater was not symmetrical. COPIED/DOE LANL RC It had vented in a Northern d