Hearings held Mar. 4-5, 1963 (pt. 1); Mar. 6-27, Apr. 1-29, May 1-21, & June 6, 1963 (pt. 2a) before the Subcommittee on Manned Space Flight; Mar. 6-27, Apr. 1-29, May, 1-21, & June 6, 1963 (pt. 2b) before the Subcommittee on Manned Space Flight; Mar. 6-28, Apr. 1-30, & May 1-8, 1963 (pt.3a) before the Subcommittee on Space Sciences and Advanced Research and Technology; Mar. 6-28, Apr. 1-30, & May 1-8, 1963 (pt. 3b) before the Subcommittee on Space Sciences and Advanced Research and Technology; Mar. 12-26, Apr. 2-30, May 2-9, & June 6, 1963 (pt. 4) before the subcommittee on Applications and Tracking and Data Acquisition.