On one of the scientific instruments, the plasma probe, there was a component failure making its readings unintelligible, although due to a better telemetry rate, some data was received between January and May 1965. 5, 1964, ensured that the spacecraft would fly between 5,0 miles (8,000 and 9,660 kilometers) from the Martian surface. Using a new all-metal shroud, the spacecraft lifted off without any problems and was successfully boosted towards Mars by the Agena D upper stage. The Mariner 4 mission, the second of two Mars flyby attempts launched in 1964 by NASA, was one of the great early successes of the agency, and indeed the Space Age, returning the very first photos of another planet from deep space.
31, 1967: Last contact with spacecraft In Depth: Mariner 4
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