An expert or specialist in the study of the ionosphere, which is the region of the Earth's atmosphere that is ionized by solar and cosmic radiation.

आयनमंडल के अध्ययन में विशेषज्ञ या विशेषज्ञ।

English Usage: The ionosphericist conducted research on the effects of solar flares on radio communications.

Hindi Usage: आयनमंडल के विशेषज्ञ ने रेडियो संचार पर सौर तूफानों के प्रभाव पर शोध किया।