 These were routine field conditions for the men of the 64th.During the early years of the Space Age, geodetic investigations by the USACE determined the earth's size and shape, and included precise geodetic and astronomic surveys in many remote areas of the Pacific, the Arctic, Asia and South America.Work by Dr. Irene Fischer helped determine the parallax of the moon, and her geoid studies helped in investigation the lingering effects of the last Ice Age.