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Table 3
Global astrometric solutions using 12 months of simulated Gaia data, where the attitude is determined as part of the solution.
| Prior σϖ,p | Fraction in 90% conf. ellipse | Actual position errors [mas] | ||||
| G ≃ 11 | G ≃ 15 | G ≃ 19 | G ≃ 11 | G ≃ 15 | G ≃ 19 | |
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| Subset of stars with ≤4 field-of-view transits | ||||||
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| σϖ,F90 | 76.5% | 86.8% | 92.4% | 1.2 | 0.7 | 2.0 |
| 10σϖ,F90 | 89.1% | 90.4% | 94.3% | 1.4 | 1.1 | 4.2 |
| 1000 mas | 89.7% | 89.8% | 90.6% | 3.8 | 3.4 | 17.7 |
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| Subset of stars with >4 field-of-view transits | ||||||
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| σϖ,F90 | 32.3% | 53.3% | 88.0% | 0.2 | 0.2 | 0.8 |
| 10σϖ,F90 | 88.6% | 89.3% | 90.4% | 0.1 | 0.2 | 1.0 |
| 1000 mas | 88.7% | 89.4% | 90.0% | 0.1 | 0.2 | 1.1 |
Notes. The prior uncertainty needs to be relaxed to 10σϖ,F90 to obtain a sensible solution. Columns as in Table 2.
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