Table 3
Three input cases used to simulate the performance of the MIRI coronagraphs.
| OPD tel. [nm] | OPD MIRI [nm] | OPD Frill [nm] | OPD IEC [nm] | OPD TD [nm] | TA [mas axis−1] | Jitter [mas axis−1] | Pupil shear [%] | |
|---|---|---|---|---|---|---|---|---|
| Best | 73 | 32 | 0.017 | 1.6 | 0.016 | 6.25 | 2.5 | 0 |
| Nominal | 73 | 32 | 0.07 | 2.8 | 0.07 | 8.76 | 3.8 | 2 |
| Requirement | 73 | 32 | 1.75 | 4.6 | 1.67 | 12.51 | 5.8 | 4 |
Notes. Wavefront errors (OPD) are provided in nanometers RMS from the telescope, the instrument MIRI, the frill around the primary mirror, the ISIM electronics compartment (IEC), and thermal distortion (TD), respectively. TA and jitter are given in milliarcsec per axis, and the shear is given as a percentage of the telescope pupil.
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