Investigation of the Occurrence of Nighttime Topside Ionospheric Irregularities in Low-Latitude and Equatorial Regions Using CYGNSS Satellites
By using multi-satellite observations of the L1 signal-to-noise ratio (SNR) from the Cyclone Global Navigation Satellite System (CYGNSS) taken in 2017, we present the occurrence of nighttime topside ionospheric irregularities in low-latitude and equatorial regions. The most significant finding of th...
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| Format: | Article |
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MDPI AG
2020-01-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/20/3/708 |
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| author | Liang Huang Yi Liu Qiong Tang Guanyi Chen Zhuangkai Wang Chen Zhou |
| author_facet | Liang Huang Yi Liu Qiong Tang Guanyi Chen Zhuangkai Wang Chen Zhou |
| author_sort | Liang Huang |
| collection | DOAJ |
| description | By using multi-satellite observations of the L1 signal-to-noise ratio (SNR) from the Cyclone Global Navigation Satellite System (CYGNSS) taken in 2017, we present the occurrence of nighttime topside ionospheric irregularities in low-latitude and equatorial regions. The most significant finding of this study is the existence of longitudinal structures with a wavenumber 4 pattern in the topside irregularities. This suggests that lower atmospheric waves, especially a daytime diurnal eastward-propagating zonal wave number-3 nonmigrating tide (DE3), might play an important role in the generation of topside plasma bubbles during the low solar minimum. Observations of scintillation events indicate that the maximum occurrence of nighttime topside ionospheric irregularities occurs on the magnetic equator during the equinoxes. The current work, which could be regarded as an important update of the previous investigations, would be readily for the further global analysis of the topside ionospheric irregularities. |
| first_indexed | 2024-04-11T21:48:21Z |
| format | Article |
| id | doaj.art-2b8d71a031c541068c5153142dc86b32 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T21:48:21Z |
| publishDate | 2020-01-01 |
| publisher | MDPI AG |
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| series | Sensors |
| spelling | doaj.art-2b8d71a031c541068c5153142dc86b322022-12-22T04:01:19ZengMDPI AGSensors1424-82202020-01-0120370810.3390/s20030708s20030708Investigation of the Occurrence of Nighttime Topside Ionospheric Irregularities in Low-Latitude and Equatorial Regions Using CYGNSS SatellitesLiang Huang0Yi Liu1Qiong Tang2Guanyi Chen3Zhuangkai Wang4Chen Zhou5Department of Space Physics, School of Electronic Information, Wuhan University, Wuhan 430072, ChinaDepartment of Space Physics, School of Electronic Information, Wuhan University, Wuhan 430072, ChinaDepartment of Space Physics, School of Electronic Information, Wuhan University, Wuhan 430072, ChinaDepartment of Space Physics, School of Electronic Information, Wuhan University, Wuhan 430072, ChinaDepartment of Space Physics, School of Electronic Information, Wuhan University, Wuhan 430072, ChinaDepartment of Space Physics, School of Electronic Information, Wuhan University, Wuhan 430072, ChinaBy using multi-satellite observations of the L1 signal-to-noise ratio (SNR) from the Cyclone Global Navigation Satellite System (CYGNSS) taken in 2017, we present the occurrence of nighttime topside ionospheric irregularities in low-latitude and equatorial regions. The most significant finding of this study is the existence of longitudinal structures with a wavenumber 4 pattern in the topside irregularities. This suggests that lower atmospheric waves, especially a daytime diurnal eastward-propagating zonal wave number-3 nonmigrating tide (DE3), might play an important role in the generation of topside plasma bubbles during the low solar minimum. Observations of scintillation events indicate that the maximum occurrence of nighttime topside ionospheric irregularities occurs on the magnetic equator during the equinoxes. The current work, which could be regarded as an important update of the previous investigations, would be readily for the further global analysis of the topside ionospheric irregularities.https://www.mdpi.com/1424-8220/20/3/708cygnssnighttime topside ionospheric irregularitieswavenumber 4 patternde3 |
| spellingShingle | Liang Huang Yi Liu Qiong Tang Guanyi Chen Zhuangkai Wang Chen Zhou Investigation of the Occurrence of Nighttime Topside Ionospheric Irregularities in Low-Latitude and Equatorial Regions Using CYGNSS Satellites Sensors cygnss nighttime topside ionospheric irregularities wavenumber 4 pattern de3 |
| title | Investigation of the Occurrence of Nighttime Topside Ionospheric Irregularities in Low-Latitude and Equatorial Regions Using CYGNSS Satellites |
| title_full | Investigation of the Occurrence of Nighttime Topside Ionospheric Irregularities in Low-Latitude and Equatorial Regions Using CYGNSS Satellites |
| title_fullStr | Investigation of the Occurrence of Nighttime Topside Ionospheric Irregularities in Low-Latitude and Equatorial Regions Using CYGNSS Satellites |
| title_full_unstemmed | Investigation of the Occurrence of Nighttime Topside Ionospheric Irregularities in Low-Latitude and Equatorial Regions Using CYGNSS Satellites |
| title_short | Investigation of the Occurrence of Nighttime Topside Ionospheric Irregularities in Low-Latitude and Equatorial Regions Using CYGNSS Satellites |
| title_sort | investigation of the occurrence of nighttime topside ionospheric irregularities in low latitude and equatorial regions using cygnss satellites |
| topic | cygnss nighttime topside ionospheric irregularities wavenumber 4 pattern de3 |
| url | https://www.mdpi.com/1424-8220/20/3/708 |
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