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

Demidov, M. L.; Wang, Xiaofeng; Wang, D. G.; Deng, Yuanyong

doi:10.1007/s11207-018-1366-6

Cited by 5 publications

(2 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hayashi et al (2016) used the synoptic maps of solar photospheric magnetic field from four observatories including HMI and SMAT to make a comparison of potential field solutions for Carrington Rotation 2144. Demidov et al (2018) compared the LOS magnetograms obtained by SMAT, HMI and Solar Telescope for Operative Predictions (STOP). It was found that there was a general consistency among different instruments, but there were also some differences.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Line-of-Sight Magnetic Field Observed by ASO-S/FMG, SDO/HMI and HSOS/SMAT

Xu,

Su,

Liu

et al. 2024

Sol Phys

View full text Add to dashboard Cite

The Full-disk MagnetoGraph (FMG) onboard the Advanced Space based Solar Observatory (ASO-S) has obtained a series of Line-of-Sight (LOS) magnetic field since it launched in October 2022. It is important to compare its observational data with other existing solar telescopes. In this paper, we make a detail data comparison of 4 active regions and a pore region simultaneously observed by FMG, SDO/HMI (Helioseismic and Magnetic Imager onboard Solar Dynamic Observatory) and HSOS/SMAT (Solar Magnetism and Activity Telescope at the Huairou Solar Observing Station). The magnetic field structure and spatial distribution are found basically consistent among these three instruments, and the initial correlation coefficient of magnetic field is approximately 0.90. They slightly increase when sunspot umbra region was removed, and they significant increase in penumbra region, up to 0.98. The magnetic field observed by FMG tends to smaller than the HMI in strength in sunspot umbra due to saturation effect, whereas larger outside sunspot. The differences probably come from the affections of noise, the seeing condition (SMAT is affected by the Earth's atmosphere), and observational and calibration methods.

show abstract

Section: Introductionmentioning

confidence: 99%

Comparison of Line-of-Sight Magnetic Field Observed by ASO-S/FMG, SDO/HMI and HSOS/SMAT

Xu,

Su,

Liu

et al. 2024

Sol Phys

View full text Add to dashboard Cite

show abstract

“…As is known from numerous previous studies, the full-disk solar magnetograms [1][2][3], synoptic maps [4], the size and location of the calculated coronal holes and heliospheric current sheet [5], as well as interplanetary field strength [6] can sometimes differ very significantly when observations from different instruments are used. So it is very interesting to explore the possible differences in the calculations of the solar wind speed (one of the important space weather parameters) when different synoptic maps (low boundary conditions) from different observatories are used.…”

Section: Introductionmentioning

confidence: 99%

On the role of empirical boundary conditions in space weather prediction results

Demidov¹

2022

Proceedings of the Multifaceted Universe: Theory and Observations - 2022 — PoS(MUTO2022)

View full text Add to dashboard Cite

Prediction of the conditions in the near-Earth space environment (space weather) is an urgent scientific and practical task, and there are several scientific teams in the world which have been deeply involved in this research using various model assumptions. One of the most important problems in such calculations is the reliability of the initial data -synoptic maps of the solar magnetic fields. The most famous Space Weather Prediction Center (SWPC) uses observations of the Global Oscillations Network Group (GONG). However, there are other sources of measurements of the full-disk solar magnetic fields (WSO, SDO/HMI and SOLIS in the USA, IRmag at Mitaka in Japan, SMAT in China, STOPs in Russia), and it is of interest to use them to calculate the parameters of the solar wind. In this paper this is done on the example of Carrington Rotation (CR) 2164 using observations from Wilcox Solar Observatory (WSO), GONG, Solar Telescope for Operative Prediction (STOP) at the Sayan Solar Observatory (SSO). The calculations are based on the Wang-Sheeley-Arge (WSA) model and include the determination of the parameters of the coronal magnetic field in the Potential Field Source Surface (PFSS) approximation. The propagation of the solar wind to Earth's orbit is calculated using the HUX (Heliospheric Upwind eXtrapolation) model. It is shown that the differences in solar wind speeds for different data sets can reach 200 km/s or even more. The results of model simulations are compared with the experimental ACE satellite data.

show abstract

Large-Scale Solar Magnetic Fields Observed with the Infrared Spectro-Polarimeter IRmag at the National Astronomical Observatory of Japan: Comparison of Measurements Made in Different Spectral Lines and Observatories

et al. 2020

View full text Add to dashboard Cite

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

Cited by 5 publications

References 30 publications

Comparison of Line-of-Sight Magnetic Field Observed by ASO-S/FMG, SDO/HMI and HSOS/SMAT

Comparison of Line-of-Sight Magnetic Field Observed by ASO-S/FMG, SDO/HMI and HSOS/SMAT

On the role of empirical boundary conditions in space weather prediction results

Large-Scale Solar Magnetic Fields Observed with the Infrared Spectro-Polarimeter IRmag at the National Astronomical Observatory of Japan: Comparison of Measurements Made in Different Spectral Lines and Observatories

Contact Info

Product

Resources

About