| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| population size model | 1.5 | 0.9 | 9656 | 39 | 21 |
| population | 1.24 | 0.6 | 3223 | 21 | 10 |
| size | 1.57 | 0.1 | 6994 | 66 | 4 |
| model | 0.47 | 0.5 | 124 | 99 | 5 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| population size model | 1.3 | 0.3 | 8123 | 6 |
| population model of small size space debris | 1.7 | 0.9 | 5781 | 16 |
| total mass of small space debris | 0.01 | 0.6 | 5574 | 73 |
| space debris 3d model | 0.82 | 0.3 | 1328 | 4 |
| total mass of space debris | 0.87 | 0.1 | 8584 | 77 |
| the number of space debris | 0.51 | 0.5 | 1011 | 43 |
| amount of space debris in space | 0.48 | 0.8 | 5001 | 56 |
| image of space debris | 0.26 | 0.2 | 4976 | 42 |
| space debris models and risk analysis | 0.84 | 0.4 | 1976 | 99 |
| amount of debris in space | 1.14 | 0.7 | 9043 | 37 |
