单词 | ionosonde |
释义 | ionosonde/ʌɪˈɒnəsɒnd/Atmospheric Physics noun An instrument for obtaining information about the ionosphere by transmitting a succession of radio pulses into it at different frequencies and recording and analysing their echoes. Origin1950s; earliest use found in Monthly Notices of the Royal Astronomical Society. From iono- + sonde. |
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