Solar Proton Monitoring Experiment

The solar proton monitoring experiment used four separate detectors, each of which used one or more solid-state sensors. Three detectors measured the omnidirectional fluxes of protons and alpha particles with energy per nucleon values above 10, 30, and 60 MeV. Alpha particle contributions to the total count rates were generally less than 10%. These detectors were also sensitive to electrons above approximately 0.7, 2, and 8 MeV, respectively. The 10-MeV channel was sampled for two 19.2-s intervals every 163.8 s and the 30- and 60-MeV channels for one 19.2-s interval every 163.8 s. Resultant hourly averaged fluxes have been published in Solar-Geophysical Data (NOAA, Boulder) on a rapid basis. The fourth detector had a 60-deg full look angle normal to the spacecraft spin axis and measured fluxes of 1- to 10-MeV protons for two 19.2-s intervals every 163.8 s. Data were obtained from the first three detectors between launch and May 3, 1969. Data from the fourth detector were obtained between launch and June 12, 1968. NSSDC has all the useful data that now exist.

该太阳质子监测实验采用了四个独立的探测器，每个探测器均配备一个或多个固态传感器。其中三个探测器测量了质子和α粒子的全向通量，其每核子能量值分别为10、30和60 MeV。α粒子对总计数率的贡献通常低于10%。这些探测器对约0.7、2和8 MeV的电子也具有敏感性。10-MeV通道每163.8秒采样两次，每次19.2秒，而30-MeV和60-MeV通道则每163.8秒采样一次，每次19.2秒。所得的每小时平均通量已迅速发布在《太阳地球物理数据》（NOAA，博尔德）上。第四个探测器具有60度的全视场角，垂直于航天器自旋轴，并测量了每163.8秒两次，每次19.2秒的1至10 MeV质子通量。从发射到1969年5月3日之间，获取了前三个探测器的数据。第四个探测器的数据则是在发射到1968年6月12日之间获取的。国家空间科学数据中心（NSSDC）拥有目前所有有用的数据。