ionosonde
/aɪˈɑnəˌsɑnd/
noun
- A device that sends radio waves upward to study the ionosphere, especially to measure its height and density.
- Scientists deployed a portable ionosonde to study changes in the ionosphere during a solar storm.
- Weather forecasters use data from an ionosonde to predict how radio waves will travel.
- The ionosonde at the research station sends signals to measure the layers of the upper atmosphere.