Wavefront error of PHI/HRT on Solar Orbiter at various heliocentric distances

Kahil, F.; Gandorfer, A.; Hirzberger, J.; Calchetti, D.; Sinjan, J.; Valori, G.; Solanki, S. K.; van Noort, M.; Albert, K.; Albelo, Jorge N.; Alvarez-Herrero, A.; Appourchaux, T.; Bellot Rubio, L. R.; Blanco Rodríguez, J.; Feller, A.; Fiethe, B.; Germerott, D.; Gizon, L.; Guerrero, Lucas; Gutierrez-Marques, P.; Kolleck, M.; Korpi-Lagg, A.; Michalik, H.; Moreno Vacas, A.; Orozco Suárez, D.; Pérez-Grande, I.; Sanchis Kilders, E.; Schou, J.; Schühle, U.; Staub, Jan; Strecker, H.; del Toro Iniesta, J. C.; Volkmer, R.; Woch, J.

doi:10.1051/0004-6361/202346033

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学術論文

Wavefront error of PHI/HRT on Solar Orbiter at various heliocentric distances

MPS-Authors

/persons/resource/persons209278

Kahil, F.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103917

Gandorfer, A.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103966

Hirzberger, J.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons283892

Calchetti, D.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons292210

Sinjan, J.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons274392

Valori, G.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104218

Solanki, S. K.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104263

van Noort, M.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons231801

Albert, K.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons291346

Albelo, Jorge N.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103910

Feller, A.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103923

Germerott, D.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103925

Gizon, L.
Department Solar and Stellar Interiors, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons291348

Guerrero, Lucas
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons103944

Gutierrez-Marques, P.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104018

Kolleck, M.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104044

Korpi-Lagg, A.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons129829

Schou, J.
Department Solar and Stellar Interiors, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104197

Schühle, U.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104226

Staub, Jan
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

/persons/resource/persons104296

Woch, J.
Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;

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https://ui.adsabs.harvard.edu/abs/2023A&A...675A..61K
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引用

Kahil, F., Gandorfer, A., Hirzberger, J., Calchetti, D., Sinjan, J., Valori, G., Solanki, S. K., van Noort, M., Albert, K., Albelo, J. N., Alvarez-Herrero, A., Appourchaux, T., Bellot Rubio, L. R., Blanco Rodríguez, J., Feller, A., Fiethe, B., Germerott, D., Gizon, L., Guerrero, L., Gutierrez-Marques, P., Kolleck, M., Korpi-Lagg, A., Michalik, H., Moreno Vacas, A., Orozco Suárez, D., Pérez-Grande, I., Sanchis Kilders, E., Schou, J., Schühle, U., Staub, J., Strecker, H., del Toro Iniesta, J. C., Volkmer, R., & Woch, J. (2023). Wavefront error of PHI/HRT on Solar Orbiter at various heliocentric distances. Astronomy and Astrophysics, 675, A61. doi:10.1051/0004-6361/202346033.

引用: https://hdl.handle.net/21.11116/0000-000D-8DA7-8

要旨

Aims: We use wavefront sensing to characterise the image quality of the High Resolution Telescope (HRT) of the Polarimetric and Helioseismic Imager (SO/PHI) data products during the second remote sensing window of the Solar Orbiter (SO) nominal mission phase. Our ultimate aims are to reconstruct the HRT data by deconvolving with the HRT point spread function (PSF) and to correct for the effects of optical aberrations on the data.
Methods: We use a pair of focused-defocused images to compute the wavefront error and derive the PSF of HRT by means of a phase diversity (PD) analysis.
Results: The wavefront error of HRT depends on the orbital distance of SO to the Sun. At distances > 0.5 au, the wavefront error is small, and stems dominantly from the inherent optical properties of HRT. At distances < 0.5 au, the thermo-optical effect of the Heat Rejection Entrance Window (HREW) becomes noticeable. We develop an interpolation scheme for the wavefront error that depends on the thermal variation of the HREW with the distance of SO to the Sun. We also introduce a new level of image reconstruction, termed `aberration correction', which is designed to reduce the noise caused by image deconvolution while removing the aberrations caused by the HREW.
Conclusions: The computed PSF via phase diversity significantly reduces the degradation caused by the HREW in the near-perihelion HRT data. In addition, the aberration correction increases the noise by a factor of only 1.45 compared to the factor of 3 increase that results from the usual PD reconstructions.