1961-11-01 USA Mercury Scout MS-1

The launch of Mercury Scout 1 (MS-1) on November 1, 1961, aimed to test tracking stations for Project Mercury flights. It utilized Scout rockets to deploy small satellites for assessing the global Mercury Tracking Network in preparation for crewed orbital missions. However, the launch encountered issues shortly after liftoff and was aborted by the Range Safety Officer due to erratic oscillations of the booster.

MS-1 launch, postmarked PAFB, November 1, 1961.
(Reference from Mercury-Scout 1)