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The STIX Aspect System (SAS): The Optical Aspect System of the Spectrometer/Telescope for Imaging X-Rays (STIX) on Solar Orbiter

Urheber*innen

Warmuth,  A.
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Önel,  H.
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Mann,  G.
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Rendtel,  J.
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Strassmeier,  K. G.
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Denker,  C.
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Hurford,  G. J.
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Krucker,  S.
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Anderson,  James
1.1 Space Geodetic Techniques, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Bauer,  S.-M.
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Bittner,  W.
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Dionies,  F.
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Paschke,  J.
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Plüschke,  D.
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Sablowski,  D. P.
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Schuller,  F.
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Senthamizh Pavai,  V.
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Woche,  M.
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Casadei,  D.
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Kögl,  S.
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Arnold,  N. G.
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Gröbelbauer,  H.-P.
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Schori,  D.
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Wiehl,  H. J.
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Csillaghy,  A.
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Grimm,  O.
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Orleanski,  P.
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Skup,  K. R.
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Bujwan,  W.
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Rutkowski,  K.
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Ber,  K.
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Volltexte (frei zugänglich)

5003243.pdf
(Verlagsversion), 2MB

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Zitation

Warmuth, A., Önel, H., Mann, G., Rendtel, J., Strassmeier, K. G., Denker, C., Hurford, G. J., Krucker, S., Anderson, J., Bauer, S.-M., Bittner, W., Dionies, F., Paschke, J., Plüschke, D., Sablowski, D. P., Schuller, F., Senthamizh Pavai, V., Woche, M., Casadei, D., Kögl, S., Arnold, N. G., Gröbelbauer, H.-P., Schori, D., Wiehl, H. J., Csillaghy, A., Grimm, O., Orleanski, P., Skup, K. R., Bujwan, W., Rutkowski, K., Ber, K. (2020): The STIX Aspect System (SAS): The Optical Aspect System of the Spectrometer/Telescope for Imaging X-Rays (STIX) on Solar Orbiter. - Solar Physics, 295, 90.
https://doi.org/10.1007/s11207-020-01660-w


Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5003243
Zusammenfassung
The Spectrometer/Telescope for Imaging X-rays (STIX) is a remote sensing instrument on Solar Orbiter that observes the hard X-ray bremsstrahlung emission of solar flares. This paper describes the STIX Aspect System (SAS), a subunit that measures the pointing of STIX relative to the Sun with a precision of ±4′′, which is required to accurately localize the reconstructed X-ray images on the Sun. The operating principle of the SAS is based on an optical lens that images the Sun onto a plate that is perforated by small apertures arranged in a cross-shaped configuration of four radial arms. The light passing through the apertures of each arm is detected by a photodiode. Variations of spacecraft pointing and of distance from the Sun cause the solar image to move over different apertures, leading to a modulation of the measured lightcurves. These signals are used by ground analysis to calculate the locations of the solar limb, and hence the pointing of the telescope.