Complex sentence: Ionospheric soundings, geomagnetic, F region vertical drift and surface observations are made here regularly and summaries of the data obtained are sent to national IMD and global WMO GAW data centers.
Split into simpler sentences: Ionospheric soundings, geomagnetic, F region vertical drift and surface observations are made here regularly. Summaries of the data obtained are sent to national (IMD) and global (WMO, GAW) data centers.