Basic measurements of radiation at station Granite Island (2023-03)

The tracker has not been working at all this month. Direct and diffuse have therefore been removed. The global component of the data should still be good.本月内该跟踪器（tracker）完全无法正常工作，因此已移除直接分量与漫射分量的数据。不过，数据中的全局分量仍保持完好可用。