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| "SpaceCraft" Pioneer 8 launch cover cancelled at Cape Canaveral, December 13, 1967. Signed by Pioneer Project Manager, Charles F. Hall. |
The original launch vehicle also carried a second payload, the TTS 1 (Test and Training Satellite 1, later renamed TETR 1), fixed to the second stage, which was successfully ejected after the third stage finished firing, and entered an Earth orbit of 303 × 187 miles (488 × 301 kilometers) at a 33-degree inclination. It reentered Earth's atmosphere on May 14, 1968.
