| Answer | Crossword Clue |
|---|---|
| ionosonde | pulsed radar device used to measure the height of ionospheric layers |
| Answer | Crossword Clue |
|---|---|
| ionosonde | pulsed radar device used to measure the height of ionospheric layers |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.