satellite observation : 87 phrases in 13 subjects |
Astrometry | 1 |
Astronautics | 22 |
Cartography | 1 |
Computers | 1 |
Ecology | 1 |
Electronics | 2 |
Environment | 1 |
General | 6 |
High frequency electronics | 1 |
Meteorology | 2 |
Military | 36 |
Technology | 12 |
United Nations | 1 |