Cross-Calibrating Sunspot Magnetic Field Strength Measurements from the McMath–Pierce Solar Telescope and the Dunn Solar Telescope

Watson, Fraser; Beck, C.; Penn, Matthew; Tritschler, A.; Pillet, V. Martínez; Livingston, W.

doi:10.1007/s11207-015-0803-z

Cited by 3 publications

(1 citation statement)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the first time, the Solar Orbiter's PHI instrument (Solanki et al 2019) will provide surface magnetic field measurements from outside the Sun-Earth line and from outside the ecliptic plane. Despite possible issues with cross-calibration of magnetic field measurements between different instruments and observatories (see e.g., Bai et al 2014;Riley et al 2014;Watson et al 2015), coordinated observations from Earth and Solar Orbiter's PHI will provide better photospheric boundary conditions for 3D modeling. For instance, observations of the same solar region from both Solar Orbiter's PHI and Earth's orbit (via, say, SDO/HMI) can enable the unique removal of the 180 • ambiguity in the transverse component of the photospheric magnetic field ( Fig.…”

Section: Some Challenges To Model Coronal Magnetic Fieldsmentioning

confidence: 99%

Models and data analysis tools for the Solar Orbiter mission

Rouillard

Pinto

Vourlidas

et al. 2020

A&A

View full text Add to dashboard Cite

Context. The Solar Orbiter spacecraft will be equipped with a wide range of remote-sensing (RS) and in-situ (IS) instruments to record novel and unprecedented measurements of the solar atmosphere and the inner heliosphere. To take full advantage of these new datasets, tools and techniques must be developed to ease multi-instrument and multi-spacecraft studies. In particular the currently inaccessible low solar corona below two solar radii can only be observed remotely. Furthermore techniques must be used to retrieve coronal plasma properties in time and in three dimensional (3D) space. Solar Orbiter will run complex observation campaigns that provide interesting opportunities to maximise the likelihood of linking IS data to their source region near the Sun. Several RS instruments can be directed to specific targets situated on the solar disk just days before data acquisition. To compare IS and RS, data we must improve our understanding of how heliospheric probes magnetically connect to the solar disk. Aims. The aim of the present paper is to briefly review how the current modelling of the Sun and its atmosphere can support Solar Orbiter science. We describe the results of a community-led effort by European Space Agency (ESA)'s Modelling and Data Analysis Working Group (MADAWG) to develop different models, tools, and techniques deemed necessary to test different theories for the physical processes that may occur in the solar plasma. The focus here is on the large scales and little is described with regards to kinetic processes. To exploit future IS and RS data fully, many techniques have been adapted to model the evolving 3D solar magneto-plasma from the solar interior to the solar wind. A particular focus in the paper is placed on techniques that can estimate how Solar Orbiter will connect magnetically through the complex coronal magnetic fields to various photospheric and coronal features in support of spacecraft operations and future scientific studies. Methods. Recent missions such as STEREO, provided great opportunities for RS, IS, and multi-spacecraft studies. We summarise the achievements and highlight the challenges faced during these investigations, many of which motivated the Solar Orbiter mission. We present the new tools and techniques developed by the MADAWG to support the science operations and the analysis of the data from the many instruments on Solar Orbiter. Results. This article reviews current modelling and tool developments that ease the comparison of model results with RS and IS data made available by current and upcoming missions. It also describes the modelling strategy to support the science operations and subsequent exploitation of Solar Orbiter data in order to maximise the scientific output of the mission. Conclusions. The on-going community effort presented in this paper has provided new models and tools necessary to support mission operations as well as the science exploitation of the Solar Orbiter data. The tools and techniques will no doubt evolve significantly as we refine our proc...

show abstract

Section: Some Challenges To Model Coronal Magnetic Fieldsmentioning

confidence: 99%

Models and data analysis tools for the Solar Orbiter mission

Rouillard

Pinto

Vourlidas

et al. 2020

A&A

View full text Add to dashboard Cite

show abstract

On the Measurements of Full-Disk Longitudinal Magnetograms at Huairou Solar Observing Station

Demidov

Wang

et al. 2018

Sol Phys

View full text Add to dashboard Cite

Thermal control for light-weighted primary mirrors of large ground-based solar telescopes

Cheng

et al. 2019

J. Astron. Telesc. Instrum. Syst.

View full text Add to dashboard Cite

Thermal control for light-weighted primary mirrors of large ground-based solar telescopes,"Abstract. A light-weighted primary mirror is the most important optical element for a large ground-based solar telescope. It receives solar radiation of more than 1000 W∕m 2 , of which about 10% is converted into heat energy, bringing in mirror seeing effect and surface shape distortion. Thus, a thermal control system (TCS) is necessary and important. Many studies have discussed the factors that influence the temperature difference between mirror surface and ambient air, but few refer to TCS modeling and optimization for the sake of parameter estimation. A thermal control model for the parameter estimation is proposed. The analytical process and the numerical analysis results of the model on the Chinese large ground-based solar telescope are given. A 60-cm prototype of open solar telescope (POST) is developed, on which practical experiment is taken place. According to the parameters estimated results, we select devices for the TCS of the POST. The experiment results show that the maximum temperature difference was restricted within AE0.5°C, despite the temperature variation of the ambient air, whereas without TCS, the maximum temperature difference rises up to 6.5°C. That validates the feasibility and effectiveness of the proposed model, and it can be referred for other large ground-based solar telescopes. © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

show abstract

Cross-Calibrating Sunspot Magnetic Field Strength Measurements from the McMath–Pierce Solar Telescope and the Dunn Solar Telescope

Cited by 3 publications

References 14 publications

Models and data analysis tools for the Solar Orbiter mission

Models and data analysis tools for the Solar Orbiter mission

On the Measurements of Full-Disk Longitudinal Magnetograms at Huairou Solar Observing Station

Thermal control for light-weighted primary mirrors of large ground-based solar telescopes

Contact Info

Product

Resources

About