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| 卫星-卫星 跟 踪: 137 phrases in 13 subjects |
| Air defense | 3 |
| Astronautics | 1 |
| Aviation | 13 |
| Business | 1 |
| Cartography | 2 |
| Earth sciences | 5 |
| Electronics | 20 |
| General | 4 |
| Geophysics | 2 |
| Information technology | 1 |
| Space | 58 |
| Technology | 23 |
| United States | 4 |
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