The zesults of the reduction and analysis of data obtained from instrumentation flown on the Air Force Satellite Hitch-hiker I (1963-25B) are presented. The instrumentation included two electrostatic analyzers (one for electrons, 15 to 100 kev, the other for protons, 15 to 100 key); a scintillation spectrometer (for electrons, 0. 7 to 4. 0 Mev); a phoswich scintillation spectrometer (for protons 1. to 5. Mev and 7. 5 to 120 Mev); and a Geiger counter (electrons greater than 4. Mev, protons greater than 40. Mev). Detailed data on integral energy spectra, pitch angle distributions, and perpendicular unidirectional intensities, as functions of B, L (or X, L) and time are given in five papers appended to this report. No substantial intensities of protons, 15 to 100 key, were observed. Electrons, 15 to 10C key, were observed with intensities as great as 2 x 10 5/cm 2-sec-ster-kev at 40 key, but the anomalous angular distributions obtained cab. doubt on the credibility of these data. Peak Protons in the Radiation Belts. " Paper presented at Forty-sixth Annual Meeting of the American Geophysical Union at Washington,