This document presents the results of the first United States manned orbital space flight conducted on February 20, 1962. The prelaunch activities, spacecraft description, flight operations, flight data, and postflight analyses presented form a continuation of the information previously published for the two United States manned suborbital space flights conducted on May 5, 1961, and July 21, 1961, respectively, by the National Aeronautics and Space Administration.

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"This document presents the results of the second United States manned orbital space flight conducted on May 24, 1962. The performance discussions of the spacecraft and launch systems, the modified Mercury Network, mission support personnel, and the astronaut, together with analyses of observed space phenomena and the medical aspects of the mission, form a continuation of the information previously published for the first United States manned orbital flight, conducted on February 20, 1962, and the two manned sub-orbital space flights."--P. iii.

This document presents the results of the third United States manned orbital space flight conducted on October 3, 1962. The performance discussions of the spacecraft and launch-vehicle systems, the flight control personnel, and the astronaut, together with a detailed analysis of the medical aspects of the flight, form a continuation of the information previously published for the first two United States manned orbital flights, conducted on February 20 and May 24, 1962, and the two manned suborbital space flights.--p. iii.