1962-10-03 USA Explorer 14

A Sarzin Explorer 14 launch cover, postmarked at Cape Canaveral on October 3, 1962.

Explorer 14, launched on October 3, 1962, aimed to study solar wind and radiation phenomena. Its instruments included a cosmic ray detector, an ion electron detector, a solar cell measurer, a proton analyzer, and a trapped particle radiation experiment. The spacecraft also featured an experiment to measure how radiation affected solar power cells, and its own solar cells were protected by a 60mm glass cover.

(Reference from Discovering the Cosmos with Small Spacecraft: The American Explorer Program By Brian Harvey)