satellite observations: 97 phrases in 15 subjects |
Astrometry | 1 |
Astronautics | 25 |
Cartography | 1 |
Computers | 1 |
Ecology | 1 |
Electronics | 2 |
Environment | 1 |
General | 5 |
High frequency electronics | 1 |
Makarov | 2 |
Meteorology | 2 |
Military | 39 |
Physics | 1 |
Technology | 14 |
United Nations | 1 |