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Study on the Method of Extracting Plasma Lines Based on Sanya Incoherent Scatter Radar.

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Title: Study on the Method of Extracting Plasma Lines Based on Sanya Incoherent Scatter Radar.
Authors: Hao, Honglian1,2,3 (AUTHOR), Zhao, Biqiang1,2,3 (AUTHOR) zbqjz@mail.iggcas.ac.cn, Yue, Xinan1,2,3 (AUTHOR), Ding, Feng1,2,3 (AUTHOR), Ning, Baiqi1,3 (AUTHOR), Zeng, Lingqi1,3 (AUTHOR)
Source: Remote Sensing. May2023, Vol. 15 Issue 10, p2634. 13p.
Subjects: Incoherent scattering, Plasma Langmuir waves, Radar, Power spectra, Solar radiation, Electron density
Abstract: The plasma lines observed by Sanya incoherent scatter radar (SYISR) are dependent on the enhancement of Langmuir waves due to superthermal photoelectrons generated by solar EUV radiation. The plasma line power spectrum can be obtained using long-pulse and alternating-code transmission signals during the period from sunrise to noon almost every day. For the power spectrum of the long pulse, the CLEAN algorithm that has been applied in this field is used to verify the feasibility of this method for SYISR in only a few cases. However, it is difficult to deal with alternating code with such a low SNR using the general deconvolution method. The irreversible-migration filtering (IMF) method has been developed to separate signal noise from the measurements of the alternating code. Some experimental results from the SYISR measurements validate the excellent performance of the IMF method for alternating code. Additionally, an example observation of the electron density with a high time and range resolution is derived. The results show that plasma line detection can be a powerful new observational capability for SYISR as an ionospheric experimental mode for ionospheric calibration, when possible, which can be simultaneously measured with the ion line for constant radar calibration in the standard fitting of the ion line. [ABSTRACT FROM AUTHOR]
Copyright of Remote Sensing is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Study on the Method of Extracting Plasma Lines Based on Sanya Incoherent Scatter Radar.
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  Data: <searchLink fieldCode="AR" term="%22Hao%2C+Honglian%22">Hao, Honglian</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhao%2C+Biqiang%22">Zhao, Biqiang</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> zbqjz@mail.iggcas.ac.cn</i><br /><searchLink fieldCode="AR" term="%22Yue%2C+Xinan%22">Yue, Xinan</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ding%2C+Feng%22">Ding, Feng</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ning%2C+Baiqi%22">Ning, Baiqi</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zeng%2C+Lingqi%22">Zeng, Lingqi</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Remote+Sensing%22">Remote Sensing</searchLink>. May2023, Vol. 15 Issue 10, p2634. 13p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Incoherent+scattering%22">Incoherent scattering</searchLink><br /><searchLink fieldCode="DE" term="%22Plasma+Langmuir+waves%22">Plasma Langmuir waves</searchLink><br /><searchLink fieldCode="DE" term="%22Radar%22">Radar</searchLink><br /><searchLink fieldCode="DE" term="%22Power+spectra%22">Power spectra</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+radiation%22">Solar radiation</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+density%22">Electron density</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The plasma lines observed by Sanya incoherent scatter radar (SYISR) are dependent on the enhancement of Langmuir waves due to superthermal photoelectrons generated by solar EUV radiation. The plasma line power spectrum can be obtained using long-pulse and alternating-code transmission signals during the period from sunrise to noon almost every day. For the power spectrum of the long pulse, the CLEAN algorithm that has been applied in this field is used to verify the feasibility of this method for SYISR in only a few cases. However, it is difficult to deal with alternating code with such a low SNR using the general deconvolution method. The irreversible-migration filtering (IMF) method has been developed to separate signal noise from the measurements of the alternating code. Some experimental results from the SYISR measurements validate the excellent performance of the IMF method for alternating code. Additionally, an example observation of the electron density with a high time and range resolution is derived. The results show that plasma line detection can be a powerful new observational capability for SYISR as an ionospheric experimental mode for ionospheric calibration, when possible, which can be simultaneously measured with the ion line for constant radar calibration in the standard fitting of the ion line. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Remote Sensing is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/rs15102634
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        Text: English
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        PageCount: 13
        StartPage: 2634
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      – SubjectFull: Incoherent scattering
        Type: general
      – SubjectFull: Plasma Langmuir waves
        Type: general
      – SubjectFull: Radar
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      – SubjectFull: Power spectra
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      – SubjectFull: Solar radiation
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      – SubjectFull: Electron density
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      – TitleFull: Study on the Method of Extracting Plasma Lines Based on Sanya Incoherent Scatter Radar.
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            NameFull: Hao, Honglian
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            NameFull: Zhao, Biqiang
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              M: 05
              Text: May2023
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