Proton alpha telescope, experiment S28 flight spare for ESRO-2 (IRIS) satellite, made by McMichael Ltd. for A. C. Durney, Imperial College, used to measure variations in high-energy protons.
Proton alpha telescope, experiment S28 flight spare for ESRO-2 (IRIS) satellite, made by McMichael Ltd. for A. C. Durney, Imperial College, used to measure variations in high-energy protons.