Semiannual variation in relativistic electron fluxes of the outer radiation belt: Phases comparison with classical hypotheses predictions
Relativistic electron fluxes of the outer Van Allen belt present a clear semiannual signature, with maxima fluxes near the equinoxes and minima near the solstices. We investigate the semiannual variation (SAV) of 3.75 MeV and 3.4 MeV electron fluxes from Solar, Anomalous, and Magnetospheric Particle...
Ausführliche Beschreibung
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| Autor*in: |
Poblet, Facundo L. [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2021transfer abstract |
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| Umfang: |
12 |
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| Übergeordnetes Werk: |
Enthalten in: Posttranscriptional actions of triiodothyronine on - Bargi-Souza, Paula ELSEVIER, 2018, including COSPAR information bulletin : the official journal of the Committee on Space Research (COSPAR), a scientific committee of the International Council of Scientific Unions (ICSU), Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:68 ; year:2021 ; number:1 ; day:1 ; month:07 ; pages:170-181 ; extent:12 |
| Links: |
|---|
| DOI / URN: |
10.1016/j.asr.2021.02.038 |
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ELV054081548 |
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| 245 | 1 | 0 | |a Semiannual variation in relativistic electron fluxes of the outer radiation belt: Phases comparison with classical hypotheses predictions |
| 264 | 1 | |c 2021transfer abstract | |
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| 520 | |a Relativistic electron fluxes of the outer Van Allen belt present a clear semiannual signature, with maxima fluxes near the equinoxes and minima near the solstices. We investigate the semiannual variation (SAV) of 3.75 MeV and 3.4 MeV electron fluxes from Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) and Van Allen probe A (RBSP-A) data, respectively. The fluxes of both missions are binned in McIlwain’s L-shell values and in day of year (DOY). In order to obtain the SAV from the data, a superposed epoch analysis and then a 30-day smoothing is carried out for the entire L-shell range utilized. The results show clear semiannual patterns with maximum differences of ~ 1 and ~ 2 orders of magnitude between values near the equinoxes and solstices, for SAMPEX and RBSP-A fluxes, respectively. The comparison of the maxima-minima dates of the observed SAVs with corresponding dates predicted by the Axial, Equinoctial and Russell & McPherron (RM) theory shows that the latter gives the best estimations for both data sets. However, considerable delays from the theories’ predictions are found. The most important delay occurs in the Mar/Apr maximum and is found to be ~ 26.8 days on average for L ≳ 3.5 RBSP-A data. In the case of SAMPEX, this delay is found for L < 3.8 with a maximum of 22.4 days. Accurately determining the Mar/Apr maximum and the Sep/Oct maximum has implications in space weather since it indicates when the SAV will affect the most particular flux enhancements capable of inducing satellite operational anomalies. . | ||
| 520 | |a Relativistic electron fluxes of the outer Van Allen belt present a clear semiannual signature, with maxima fluxes near the equinoxes and minima near the solstices. We investigate the semiannual variation (SAV) of 3.75 MeV and 3.4 MeV electron fluxes from Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) and Van Allen probe A (RBSP-A) data, respectively. The fluxes of both missions are binned in McIlwain’s L-shell values and in day of year (DOY). In order to obtain the SAV from the data, a superposed epoch analysis and then a 30-day smoothing is carried out for the entire L-shell range utilized. The results show clear semiannual patterns with maximum differences of ~ 1 and ~ 2 orders of magnitude between values near the equinoxes and solstices, for SAMPEX and RBSP-A fluxes, respectively. The comparison of the maxima-minima dates of the observed SAVs with corresponding dates predicted by the Axial, Equinoctial and Russell & McPherron (RM) theory shows that the latter gives the best estimations for both data sets. However, considerable delays from the theories’ predictions are found. The most important delay occurs in the Mar/Apr maximum and is found to be ~ 26.8 days on average for L ≳ 3.5 RBSP-A data. In the case of SAMPEX, this delay is found for L < 3.8 with a maximum of 22.4 days. Accurately determining the Mar/Apr maximum and the Sep/Oct maximum has implications in space weather since it indicates when the SAV will affect the most particular flux enhancements capable of inducing satellite operational anomalies. . | ||
| 650 | 7 | |a Russell & McPherron effect |2 Elsevier | |
| 650 | 7 | |a Outer radiation belt |2 Elsevier | |
| 650 | 7 | |a Relativistic electron fluxes |2 Elsevier | |
| 650 | 7 | |a Semiannual variation |2 Elsevier | |
| 700 | 1 | |a Azpilicueta, Francisco |4 oth | |
| 700 | 1 | |a Lam, Hing-Lan |4 oth | |
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10.1016/j.asr.2021.02.038 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001397.pica (DE-627)ELV054081548 (ELSEVIER)S0273-1177(21)00185-X DE-627 ger DE-627 rakwb eng 610 570 VZ 44.89 bkl Poblet, Facundo L. verfasserin aut Semiannual variation in relativistic electron fluxes of the outer radiation belt: Phases comparison with classical hypotheses predictions 2021transfer abstract 12 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Relativistic electron fluxes of the outer Van Allen belt present a clear semiannual signature, with maxima fluxes near the equinoxes and minima near the solstices. We investigate the semiannual variation (SAV) of 3.75 MeV and 3.4 MeV electron fluxes from Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) and Van Allen probe A (RBSP-A) data, respectively. The fluxes of both missions are binned in McIlwain’s L-shell values and in day of year (DOY). In order to obtain the SAV from the data, a superposed epoch analysis and then a 30-day smoothing is carried out for the entire L-shell range utilized. The results show clear semiannual patterns with maximum differences of ~ 1 and ~ 2 orders of magnitude between values near the equinoxes and solstices, for SAMPEX and RBSP-A fluxes, respectively. The comparison of the maxima-minima dates of the observed SAVs with corresponding dates predicted by the Axial, Equinoctial and Russell & McPherron (RM) theory shows that the latter gives the best estimations for both data sets. However, considerable delays from the theories’ predictions are found. The most important delay occurs in the Mar/Apr maximum and is found to be ~ 26.8 days on average for L ≳ 3.5 RBSP-A data. In the case of SAMPEX, this delay is found for L < 3.8 with a maximum of 22.4 days. Accurately determining the Mar/Apr maximum and the Sep/Oct maximum has implications in space weather since it indicates when the SAV will affect the most particular flux enhancements capable of inducing satellite operational anomalies. . Relativistic electron fluxes of the outer Van Allen belt present a clear semiannual signature, with maxima fluxes near the equinoxes and minima near the solstices. We investigate the semiannual variation (SAV) of 3.75 MeV and 3.4 MeV electron fluxes from Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) and Van Allen probe A (RBSP-A) data, respectively. The fluxes of both missions are binned in McIlwain’s L-shell values and in day of year (DOY). In order to obtain the SAV from the data, a superposed epoch analysis and then a 30-day smoothing is carried out for the entire L-shell range utilized. The results show clear semiannual patterns with maximum differences of ~ 1 and ~ 2 orders of magnitude between values near the equinoxes and solstices, for SAMPEX and RBSP-A fluxes, respectively. The comparison of the maxima-minima dates of the observed SAVs with corresponding dates predicted by the Axial, Equinoctial and Russell & McPherron (RM) theory shows that the latter gives the best estimations for both data sets. However, considerable delays from the theories’ predictions are found. The most important delay occurs in the Mar/Apr maximum and is found to be ~ 26.8 days on average for L ≳ 3.5 RBSP-A data. In the case of SAMPEX, this delay is found for L < 3.8 with a maximum of 22.4 days. Accurately determining the Mar/Apr maximum and the Sep/Oct maximum has implications in space weather since it indicates when the SAV will affect the most particular flux enhancements capable of inducing satellite operational anomalies. . Russell & McPherron effect Elsevier Outer radiation belt Elsevier Relativistic electron fluxes Elsevier Semiannual variation Elsevier Azpilicueta, Francisco oth Lam, Hing-Lan oth Enthalten in Elsevier Science Bargi-Souza, Paula ELSEVIER Posttranscriptional actions of triiodothyronine on 2018 including COSPAR information bulletin : the official journal of the Committee on Space Research (COSPAR), a scientific committee of the International Council of Scientific Unions (ICSU) Amsterdam [u.a.] (DE-627)ELV000905844 volume:68 year:2021 number:1 day:1 month:07 pages:170-181 extent:12 https://doi.org/10.1016/j.asr.2021.02.038 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.89 Endokrinologie VZ AR 68 2021 1 1 0701 170-181 12 |
| spelling |
10.1016/j.asr.2021.02.038 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001397.pica (DE-627)ELV054081548 (ELSEVIER)S0273-1177(21)00185-X DE-627 ger DE-627 rakwb eng 610 570 VZ 44.89 bkl Poblet, Facundo L. verfasserin aut Semiannual variation in relativistic electron fluxes of the outer radiation belt: Phases comparison with classical hypotheses predictions 2021transfer abstract 12 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Relativistic electron fluxes of the outer Van Allen belt present a clear semiannual signature, with maxima fluxes near the equinoxes and minima near the solstices. We investigate the semiannual variation (SAV) of 3.75 MeV and 3.4 MeV electron fluxes from Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) and Van Allen probe A (RBSP-A) data, respectively. The fluxes of both missions are binned in McIlwain’s L-shell values and in day of year (DOY). In order to obtain the SAV from the data, a superposed epoch analysis and then a 30-day smoothing is carried out for the entire L-shell range utilized. The results show clear semiannual patterns with maximum differences of ~ 1 and ~ 2 orders of magnitude between values near the equinoxes and solstices, for SAMPEX and RBSP-A fluxes, respectively. The comparison of the maxima-minima dates of the observed SAVs with corresponding dates predicted by the Axial, Equinoctial and Russell & McPherron (RM) theory shows that the latter gives the best estimations for both data sets. However, considerable delays from the theories’ predictions are found. The most important delay occurs in the Mar/Apr maximum and is found to be ~ 26.8 days on average for L ≳ 3.5 RBSP-A data. In the case of SAMPEX, this delay is found for L < 3.8 with a maximum of 22.4 days. Accurately determining the Mar/Apr maximum and the Sep/Oct maximum has implications in space weather since it indicates when the SAV will affect the most particular flux enhancements capable of inducing satellite operational anomalies. . Relativistic electron fluxes of the outer Van Allen belt present a clear semiannual signature, with maxima fluxes near the equinoxes and minima near the solstices. We investigate the semiannual variation (SAV) of 3.75 MeV and 3.4 MeV electron fluxes from Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) and Van Allen probe A (RBSP-A) data, respectively. The fluxes of both missions are binned in McIlwain’s L-shell values and in day of year (DOY). In order to obtain the SAV from the data, a superposed epoch analysis and then a 30-day smoothing is carried out for the entire L-shell range utilized. The results show clear semiannual patterns with maximum differences of ~ 1 and ~ 2 orders of magnitude between values near the equinoxes and solstices, for SAMPEX and RBSP-A fluxes, respectively. The comparison of the maxima-minima dates of the observed SAVs with corresponding dates predicted by the Axial, Equinoctial and Russell & McPherron (RM) theory shows that the latter gives the best estimations for both data sets. However, considerable delays from the theories’ predictions are found. The most important delay occurs in the Mar/Apr maximum and is found to be ~ 26.8 days on average for L ≳ 3.5 RBSP-A data. In the case of SAMPEX, this delay is found for L < 3.8 with a maximum of 22.4 days. Accurately determining the Mar/Apr maximum and the Sep/Oct maximum has implications in space weather since it indicates when the SAV will affect the most particular flux enhancements capable of inducing satellite operational anomalies. . Russell & McPherron effect Elsevier Outer radiation belt Elsevier Relativistic electron fluxes Elsevier Semiannual variation Elsevier Azpilicueta, Francisco oth Lam, Hing-Lan oth Enthalten in Elsevier Science Bargi-Souza, Paula ELSEVIER Posttranscriptional actions of triiodothyronine on 2018 including COSPAR information bulletin : the official journal of the Committee on Space Research (COSPAR), a scientific committee of the International Council of Scientific Unions (ICSU) Amsterdam [u.a.] (DE-627)ELV000905844 volume:68 year:2021 number:1 day:1 month:07 pages:170-181 extent:12 https://doi.org/10.1016/j.asr.2021.02.038 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.89 Endokrinologie VZ AR 68 2021 1 1 0701 170-181 12 |
| allfields_unstemmed |
10.1016/j.asr.2021.02.038 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001397.pica (DE-627)ELV054081548 (ELSEVIER)S0273-1177(21)00185-X DE-627 ger DE-627 rakwb eng 610 570 VZ 44.89 bkl Poblet, Facundo L. verfasserin aut Semiannual variation in relativistic electron fluxes of the outer radiation belt: Phases comparison with classical hypotheses predictions 2021transfer abstract 12 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Relativistic electron fluxes of the outer Van Allen belt present a clear semiannual signature, with maxima fluxes near the equinoxes and minima near the solstices. We investigate the semiannual variation (SAV) of 3.75 MeV and 3.4 MeV electron fluxes from Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) and Van Allen probe A (RBSP-A) data, respectively. The fluxes of both missions are binned in McIlwain’s L-shell values and in day of year (DOY). In order to obtain the SAV from the data, a superposed epoch analysis and then a 30-day smoothing is carried out for the entire L-shell range utilized. The results show clear semiannual patterns with maximum differences of ~ 1 and ~ 2 orders of magnitude between values near the equinoxes and solstices, for SAMPEX and RBSP-A fluxes, respectively. The comparison of the maxima-minima dates of the observed SAVs with corresponding dates predicted by the Axial, Equinoctial and Russell & McPherron (RM) theory shows that the latter gives the best estimations for both data sets. However, considerable delays from the theories’ predictions are found. The most important delay occurs in the Mar/Apr maximum and is found to be ~ 26.8 days on average for L ≳ 3.5 RBSP-A data. In the case of SAMPEX, this delay is found for L < 3.8 with a maximum of 22.4 days. Accurately determining the Mar/Apr maximum and the Sep/Oct maximum has implications in space weather since it indicates when the SAV will affect the most particular flux enhancements capable of inducing satellite operational anomalies. . Relativistic electron fluxes of the outer Van Allen belt present a clear semiannual signature, with maxima fluxes near the equinoxes and minima near the solstices. We investigate the semiannual variation (SAV) of 3.75 MeV and 3.4 MeV electron fluxes from Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) and Van Allen probe A (RBSP-A) data, respectively. The fluxes of both missions are binned in McIlwain’s L-shell values and in day of year (DOY). In order to obtain the SAV from the data, a superposed epoch analysis and then a 30-day smoothing is carried out for the entire L-shell range utilized. The results show clear semiannual patterns with maximum differences of ~ 1 and ~ 2 orders of magnitude between values near the equinoxes and solstices, for SAMPEX and RBSP-A fluxes, respectively. The comparison of the maxima-minima dates of the observed SAVs with corresponding dates predicted by the Axial, Equinoctial and Russell & McPherron (RM) theory shows that the latter gives the best estimations for both data sets. However, considerable delays from the theories’ predictions are found. The most important delay occurs in the Mar/Apr maximum and is found to be ~ 26.8 days on average for L ≳ 3.5 RBSP-A data. In the case of SAMPEX, this delay is found for L < 3.8 with a maximum of 22.4 days. Accurately determining the Mar/Apr maximum and the Sep/Oct maximum has implications in space weather since it indicates when the SAV will affect the most particular flux enhancements capable of inducing satellite operational anomalies. . Russell & McPherron effect Elsevier Outer radiation belt Elsevier Relativistic electron fluxes Elsevier Semiannual variation Elsevier Azpilicueta, Francisco oth Lam, Hing-Lan oth Enthalten in Elsevier Science Bargi-Souza, Paula ELSEVIER Posttranscriptional actions of triiodothyronine on 2018 including COSPAR information bulletin : the official journal of the Committee on Space Research (COSPAR), a scientific committee of the International Council of Scientific Unions (ICSU) Amsterdam [u.a.] (DE-627)ELV000905844 volume:68 year:2021 number:1 day:1 month:07 pages:170-181 extent:12 https://doi.org/10.1016/j.asr.2021.02.038 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.89 Endokrinologie VZ AR 68 2021 1 1 0701 170-181 12 |
| allfieldsGer |
10.1016/j.asr.2021.02.038 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001397.pica (DE-627)ELV054081548 (ELSEVIER)S0273-1177(21)00185-X DE-627 ger DE-627 rakwb eng 610 570 VZ 44.89 bkl Poblet, Facundo L. verfasserin aut Semiannual variation in relativistic electron fluxes of the outer radiation belt: Phases comparison with classical hypotheses predictions 2021transfer abstract 12 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Relativistic electron fluxes of the outer Van Allen belt present a clear semiannual signature, with maxima fluxes near the equinoxes and minima near the solstices. We investigate the semiannual variation (SAV) of 3.75 MeV and 3.4 MeV electron fluxes from Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) and Van Allen probe A (RBSP-A) data, respectively. The fluxes of both missions are binned in McIlwain’s L-shell values and in day of year (DOY). In order to obtain the SAV from the data, a superposed epoch analysis and then a 30-day smoothing is carried out for the entire L-shell range utilized. The results show clear semiannual patterns with maximum differences of ~ 1 and ~ 2 orders of magnitude between values near the equinoxes and solstices, for SAMPEX and RBSP-A fluxes, respectively. The comparison of the maxima-minima dates of the observed SAVs with corresponding dates predicted by the Axial, Equinoctial and Russell & McPherron (RM) theory shows that the latter gives the best estimations for both data sets. However, considerable delays from the theories’ predictions are found. The most important delay occurs in the Mar/Apr maximum and is found to be ~ 26.8 days on average for L ≳ 3.5 RBSP-A data. In the case of SAMPEX, this delay is found for L < 3.8 with a maximum of 22.4 days. Accurately determining the Mar/Apr maximum and the Sep/Oct maximum has implications in space weather since it indicates when the SAV will affect the most particular flux enhancements capable of inducing satellite operational anomalies. . Relativistic electron fluxes of the outer Van Allen belt present a clear semiannual signature, with maxima fluxes near the equinoxes and minima near the solstices. We investigate the semiannual variation (SAV) of 3.75 MeV and 3.4 MeV electron fluxes from Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) and Van Allen probe A (RBSP-A) data, respectively. The fluxes of both missions are binned in McIlwain’s L-shell values and in day of year (DOY). In order to obtain the SAV from the data, a superposed epoch analysis and then a 30-day smoothing is carried out for the entire L-shell range utilized. The results show clear semiannual patterns with maximum differences of ~ 1 and ~ 2 orders of magnitude between values near the equinoxes and solstices, for SAMPEX and RBSP-A fluxes, respectively. The comparison of the maxima-minima dates of the observed SAVs with corresponding dates predicted by the Axial, Equinoctial and Russell & McPherron (RM) theory shows that the latter gives the best estimations for both data sets. However, considerable delays from the theories’ predictions are found. The most important delay occurs in the Mar/Apr maximum and is found to be ~ 26.8 days on average for L ≳ 3.5 RBSP-A data. In the case of SAMPEX, this delay is found for L < 3.8 with a maximum of 22.4 days. Accurately determining the Mar/Apr maximum and the Sep/Oct maximum has implications in space weather since it indicates when the SAV will affect the most particular flux enhancements capable of inducing satellite operational anomalies. . Russell & McPherron effect Elsevier Outer radiation belt Elsevier Relativistic electron fluxes Elsevier Semiannual variation Elsevier Azpilicueta, Francisco oth Lam, Hing-Lan oth Enthalten in Elsevier Science Bargi-Souza, Paula ELSEVIER Posttranscriptional actions of triiodothyronine on 2018 including COSPAR information bulletin : the official journal of the Committee on Space Research (COSPAR), a scientific committee of the International Council of Scientific Unions (ICSU) Amsterdam [u.a.] (DE-627)ELV000905844 volume:68 year:2021 number:1 day:1 month:07 pages:170-181 extent:12 https://doi.org/10.1016/j.asr.2021.02.038 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.89 Endokrinologie VZ AR 68 2021 1 1 0701 170-181 12 |
| allfieldsSound |
10.1016/j.asr.2021.02.038 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001397.pica (DE-627)ELV054081548 (ELSEVIER)S0273-1177(21)00185-X DE-627 ger DE-627 rakwb eng 610 570 VZ 44.89 bkl Poblet, Facundo L. verfasserin aut Semiannual variation in relativistic electron fluxes of the outer radiation belt: Phases comparison with classical hypotheses predictions 2021transfer abstract 12 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Relativistic electron fluxes of the outer Van Allen belt present a clear semiannual signature, with maxima fluxes near the equinoxes and minima near the solstices. We investigate the semiannual variation (SAV) of 3.75 MeV and 3.4 MeV electron fluxes from Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) and Van Allen probe A (RBSP-A) data, respectively. The fluxes of both missions are binned in McIlwain’s L-shell values and in day of year (DOY). In order to obtain the SAV from the data, a superposed epoch analysis and then a 30-day smoothing is carried out for the entire L-shell range utilized. The results show clear semiannual patterns with maximum differences of ~ 1 and ~ 2 orders of magnitude between values near the equinoxes and solstices, for SAMPEX and RBSP-A fluxes, respectively. The comparison of the maxima-minima dates of the observed SAVs with corresponding dates predicted by the Axial, Equinoctial and Russell & McPherron (RM) theory shows that the latter gives the best estimations for both data sets. However, considerable delays from the theories’ predictions are found. The most important delay occurs in the Mar/Apr maximum and is found to be ~ 26.8 days on average for L ≳ 3.5 RBSP-A data. In the case of SAMPEX, this delay is found for L < 3.8 with a maximum of 22.4 days. Accurately determining the Mar/Apr maximum and the Sep/Oct maximum has implications in space weather since it indicates when the SAV will affect the most particular flux enhancements capable of inducing satellite operational anomalies. . Relativistic electron fluxes of the outer Van Allen belt present a clear semiannual signature, with maxima fluxes near the equinoxes and minima near the solstices. We investigate the semiannual variation (SAV) of 3.75 MeV and 3.4 MeV electron fluxes from Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) and Van Allen probe A (RBSP-A) data, respectively. The fluxes of both missions are binned in McIlwain’s L-shell values and in day of year (DOY). In order to obtain the SAV from the data, a superposed epoch analysis and then a 30-day smoothing is carried out for the entire L-shell range utilized. The results show clear semiannual patterns with maximum differences of ~ 1 and ~ 2 orders of magnitude between values near the equinoxes and solstices, for SAMPEX and RBSP-A fluxes, respectively. The comparison of the maxima-minima dates of the observed SAVs with corresponding dates predicted by the Axial, Equinoctial and Russell & McPherron (RM) theory shows that the latter gives the best estimations for both data sets. However, considerable delays from the theories’ predictions are found. The most important delay occurs in the Mar/Apr maximum and is found to be ~ 26.8 days on average for L ≳ 3.5 RBSP-A data. In the case of SAMPEX, this delay is found for L < 3.8 with a maximum of 22.4 days. Accurately determining the Mar/Apr maximum and the Sep/Oct maximum has implications in space weather since it indicates when the SAV will affect the most particular flux enhancements capable of inducing satellite operational anomalies. . Russell & McPherron effect Elsevier Outer radiation belt Elsevier Relativistic electron fluxes Elsevier Semiannual variation Elsevier Azpilicueta, Francisco oth Lam, Hing-Lan oth Enthalten in Elsevier Science Bargi-Souza, Paula ELSEVIER Posttranscriptional actions of triiodothyronine on 2018 including COSPAR information bulletin : the official journal of the Committee on Space Research (COSPAR), a scientific committee of the International Council of Scientific Unions (ICSU) Amsterdam [u.a.] (DE-627)ELV000905844 volume:68 year:2021 number:1 day:1 month:07 pages:170-181 extent:12 https://doi.org/10.1016/j.asr.2021.02.038 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.89 Endokrinologie VZ AR 68 2021 1 1 0701 170-181 12 |
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English |
| source |
Enthalten in Posttranscriptional actions of triiodothyronine on Amsterdam [u.a.] volume:68 year:2021 number:1 day:1 month:07 pages:170-181 extent:12 |
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Enthalten in Posttranscriptional actions of triiodothyronine on Amsterdam [u.a.] volume:68 year:2021 number:1 day:1 month:07 pages:170-181 extent:12 |
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Article |
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Endokrinologie |
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findex.gbv.de |
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Russell & McPherron effect Outer radiation belt Relativistic electron fluxes Semiannual variation |
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semiannual variation in relativistic electron fluxes of the outer radiation belt: phases comparison with classical hypotheses predictions |
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Semiannual variation in relativistic electron fluxes of the outer radiation belt: Phases comparison with classical hypotheses predictions |
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Relativistic electron fluxes of the outer Van Allen belt present a clear semiannual signature, with maxima fluxes near the equinoxes and minima near the solstices. We investigate the semiannual variation (SAV) of 3.75 MeV and 3.4 MeV electron fluxes from Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) and Van Allen probe A (RBSP-A) data, respectively. The fluxes of both missions are binned in McIlwain’s L-shell values and in day of year (DOY). In order to obtain the SAV from the data, a superposed epoch analysis and then a 30-day smoothing is carried out for the entire L-shell range utilized. The results show clear semiannual patterns with maximum differences of ~ 1 and ~ 2 orders of magnitude between values near the equinoxes and solstices, for SAMPEX and RBSP-A fluxes, respectively. The comparison of the maxima-minima dates of the observed SAVs with corresponding dates predicted by the Axial, Equinoctial and Russell & McPherron (RM) theory shows that the latter gives the best estimations for both data sets. However, considerable delays from the theories’ predictions are found. The most important delay occurs in the Mar/Apr maximum and is found to be ~ 26.8 days on average for L ≳ 3.5 RBSP-A data. In the case of SAMPEX, this delay is found for L < 3.8 with a maximum of 22.4 days. Accurately determining the Mar/Apr maximum and the Sep/Oct maximum has implications in space weather since it indicates when the SAV will affect the most particular flux enhancements capable of inducing satellite operational anomalies. . |
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Relativistic electron fluxes of the outer Van Allen belt present a clear semiannual signature, with maxima fluxes near the equinoxes and minima near the solstices. We investigate the semiannual variation (SAV) of 3.75 MeV and 3.4 MeV electron fluxes from Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) and Van Allen probe A (RBSP-A) data, respectively. The fluxes of both missions are binned in McIlwain’s L-shell values and in day of year (DOY). In order to obtain the SAV from the data, a superposed epoch analysis and then a 30-day smoothing is carried out for the entire L-shell range utilized. The results show clear semiannual patterns with maximum differences of ~ 1 and ~ 2 orders of magnitude between values near the equinoxes and solstices, for SAMPEX and RBSP-A fluxes, respectively. The comparison of the maxima-minima dates of the observed SAVs with corresponding dates predicted by the Axial, Equinoctial and Russell & McPherron (RM) theory shows that the latter gives the best estimations for both data sets. However, considerable delays from the theories’ predictions are found. The most important delay occurs in the Mar/Apr maximum and is found to be ~ 26.8 days on average for L ≳ 3.5 RBSP-A data. In the case of SAMPEX, this delay is found for L < 3.8 with a maximum of 22.4 days. Accurately determining the Mar/Apr maximum and the Sep/Oct maximum has implications in space weather since it indicates when the SAV will affect the most particular flux enhancements capable of inducing satellite operational anomalies. . |
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Relativistic electron fluxes of the outer Van Allen belt present a clear semiannual signature, with maxima fluxes near the equinoxes and minima near the solstices. We investigate the semiannual variation (SAV) of 3.75 MeV and 3.4 MeV electron fluxes from Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) and Van Allen probe A (RBSP-A) data, respectively. The fluxes of both missions are binned in McIlwain’s L-shell values and in day of year (DOY). In order to obtain the SAV from the data, a superposed epoch analysis and then a 30-day smoothing is carried out for the entire L-shell range utilized. The results show clear semiannual patterns with maximum differences of ~ 1 and ~ 2 orders of magnitude between values near the equinoxes and solstices, for SAMPEX and RBSP-A fluxes, respectively. The comparison of the maxima-minima dates of the observed SAVs with corresponding dates predicted by the Axial, Equinoctial and Russell & McPherron (RM) theory shows that the latter gives the best estimations for both data sets. However, considerable delays from the theories’ predictions are found. The most important delay occurs in the Mar/Apr maximum and is found to be ~ 26.8 days on average for L ≳ 3.5 RBSP-A data. In the case of SAMPEX, this delay is found for L < 3.8 with a maximum of 22.4 days. Accurately determining the Mar/Apr maximum and the Sep/Oct maximum has implications in space weather since it indicates when the SAV will affect the most particular flux enhancements capable of inducing satellite operational anomalies. . |
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