Explorer 28
Explorer 28 was a satellite launched in May 1965 to study Space physics. It was powered by chemical batteries and Solar panels. There were 7 experiments on board, all devoted to particle studies. Performance was normal until mid-April 1967, when intermittent problems began. It stayed in contact until May 12, 1967, when contact was lost. The orbit kept going lower and lower until it re-entered on July 4, 1968.
