THE LABORATORY CALIBRATION OF A NOVEL SURFACE POTENTIAL MONITOR AT GEO

摘要

A novel surface potential monitor (SPM) has been developed for a satellite at GEO in China. The SPM consisted of a surface charge detector head, an electrostatic voltmeter and associated control electronics. This novel SPM has been calibrated in a simulated space environment in our laboratory. This paper describes the calibration system which consists of a non-contact voltmeter and an electron beam current monitor. The calibration method is also given, with which the linearity error of SPM is proved less than 1.7.