Orbit of Russian Satellite, 1957
Dr. Wm. A. Pickering & Dr. J.E. Froelich. 27/20: Dr. William H. Pickering, Dir. Jet Propulsion Lab & Chairman Working group for tracking and computation U.S.N.C. for I.G.Y. 13/14: Dr. William H. Pickering points to orbit of Russian Sattelite as it will be tonite 10:40 A.M. when moon passes almost [...] over Los Angeles".