Influence Of Stray Light in the Instrument on Measurements of Longitudinal Magnetic Signals and Magnetic Field Azimuths

Details Influence Of Stray Light in the Instrument on Measurements of Longitudinal Magnetic Signals and Magnetic Field Azimuths Influence Of Stray Light in the Instrument on Measurements of Longitudinal Magnetic Signals and Magnetic Field Azimuths

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005soph..226..189s&link_type=abstract

Solar Physics, Volume 226, Issue 2, pp.189-200

Physics

4

Scientific paper

Magnetic saturation is investigated by numerical simulations and observations. It is found that this effect is not a main disturbance factor in measurements of longitudinal field signals. To examine the stray light in the instrument in magnetograph observations, we determined the point spread function of the Video Vector Magnetograph mounted on the Solar Magnetic Field Telescope (SMFT) installed at the Huairou Solar Observing Station (HSOS). Then we obtained the distribution of large-spread-angle (LSA) stray light intensity as a function of distance from disk center. A new way to correct LSA stray light is proposed. Also, we investigate stray light influence on measuring magnetic field azimuths.

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