| |||
| observation | |||
| ozone observation; ozone sounding; sounding | |||
|
observation : 40 phrases in 11 subjects |
| Earth sciences | 2 |
| Electronics | 2 |
| Environment | 1 |
| Finances | 1 |
| General | 3 |
| Information technology | 1 |
| Life sciences | 21 |
| Mathematics | 3 |
| Natural sciences | 2 |
| Statistics | 3 |
| Transport | 1 |