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Table 1.
Period covered by the SPICE spk kernels of the space missions used in this work.
| Satellite | Period |
|---|---|
| Hubble Space Telescope | 1990/04/26–2019/07/05 |
| XMM-Newton Space Telescope | 1999/12/17–2019/07/05 |
| Herschel Space Observatory | 2009/05/16–2013/07/01 |
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