OV3-3

The OV3-3 spacecraft was placed into a polar orbit to measure trapped and precipitating particles and correlated electromagnetic wave fields. The spacecraft was spin stabilized at 8 rpm, and its systems performed well for 14 months, until September 1967 when the onboard tape recorder failed. After that time, low-latitude, real-time tracking continued into 1969 when the spacecraft was deactivated.OV3-3航天器被置于极地轨道，以测量被困和降落的粒子以及相关的电磁波场。航天器以每分钟8转的速度进行自旋稳定，其系统在14个月内表现良好，直至1967年9月，机载磁带记录器发生故障。此后，直至1969年航天器被停用，低纬度实时跟踪工作持续进行。