Field line dependence of magnetospheric electron density
Observations of the electron density ne based on measurement of the upper hybrid resonance frequency by the Polar spacecraft Plasma Wave Instrument (PWI) are available for March, 1996 to September, 1997, during which time the Polar orbit sampled all MLT values three times. Using this data set, we as...
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| Veröffentlicht in: | Geophysical research letters 2002-12, Vol.29 (24), p.58-1-58-4 |
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| container_title | Geophysical research letters |
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| creator | Denton, R. E. Goldstein, J. Menietti, J. D. |
| description | Observations of the electron density ne based on measurement of the upper hybrid resonance frequency by the Polar spacecraft Plasma Wave Instrument (PWI) are available for March, 1996 to September, 1997, during which time the Polar orbit sampled all MLT values three times. Using this data set, we assume a power law form for the electron density dependence along field lines ne = ne0 (Rmax/R)α, where ne0 is the equatorial electron density and Rmax ≈ LRE is the maximum geocentric radius R to any point on the field line, and model the statistical average of α as αmodel = 8.0 − 3.0 log10ne0 + 0.28 (log10ne0)2 − 0.43(Rmax/RE) for all categories of plasma (plasmasphere and plasmatrough), with an average error of 0.65. The data set on which this result is based is limited to 2.5RE ≤ Rmax ≤ 8.5RE, 2RE ≤ R ≤ Rmax, and 2 ≤ ne0 ≤ 1500 cm−3. There is no remaining dependence of the average α – αmodel on MLT or Kp. |
| doi_str_mv | 10.1029/2002GL015963 |
| format | Article |
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E. ; Goldstein, J. ; Menietti, J. D.</creator><creatorcontrib>Denton, R. E. ; Goldstein, J. ; Menietti, J. D.</creatorcontrib><description>Observations of the electron density ne based on measurement of the upper hybrid resonance frequency by the Polar spacecraft Plasma Wave Instrument (PWI) are available for March, 1996 to September, 1997, during which time the Polar orbit sampled all MLT values three times. Using this data set, we assume a power law form for the electron density dependence along field lines ne = ne0 (Rmax/R)α, where ne0 is the equatorial electron density and Rmax ≈ LRE is the maximum geocentric radius R to any point on the field line, and model the statistical average of α as αmodel = 8.0 − 3.0 log10ne0 + 0.28 (log10ne0)2 − 0.43(Rmax/RE) for all categories of plasma (plasmasphere and plasmatrough), with an average error of 0.65. The data set on which this result is based is limited to 2.5RE ≤ Rmax ≤ 8.5RE, 2RE ≤ R ≤ Rmax, and 2 ≤ ne0 ≤ 1500 cm−3. There is no remaining dependence of the average α – αmodel on MLT or Kp.</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1029/2002GL015963</identifier><language>eng</language><publisher>Blackwell Publishing Ltd</publisher><subject>Categories ; Electron density ; field line dependence ; Geophysics ; Magnetospheric electron density ; Plasma waves ; Plasmasphere ; Polar spacecraft ; Power law ; PWI</subject><ispartof>Geophysical research letters, 2002-12, Vol.29 (24), p.58-1-58-4</ispartof><rights>Copyright 2002 by the American Geophysical Union.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c5251-9685f6ffb6a90f72d6e536544413e4bba5060fc0eb2480eeeb64b535c17781563</citedby><cites>FETCH-LOGICAL-c5251-9685f6ffb6a90f72d6e536544413e4bba5060fc0eb2480eeeb64b535c17781563</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1029%2F2002GL015963$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1029%2F2002GL015963$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,1427,11493,27901,27902,45550,45551,46384,46443,46808,46867</link.rule.ids></links><search><creatorcontrib>Denton, R. E.</creatorcontrib><creatorcontrib>Goldstein, J.</creatorcontrib><creatorcontrib>Menietti, J. D.</creatorcontrib><title>Field line dependence of magnetospheric electron density</title><title>Geophysical research letters</title><addtitle>Geophys. Res. Lett</addtitle><description>Observations of the electron density ne based on measurement of the upper hybrid resonance frequency by the Polar spacecraft Plasma Wave Instrument (PWI) are available for March, 1996 to September, 1997, during which time the Polar orbit sampled all MLT values three times. Using this data set, we assume a power law form for the electron density dependence along field lines ne = ne0 (Rmax/R)α, where ne0 is the equatorial electron density and Rmax ≈ LRE is the maximum geocentric radius R to any point on the field line, and model the statistical average of α as αmodel = 8.0 − 3.0 log10ne0 + 0.28 (log10ne0)2 − 0.43(Rmax/RE) for all categories of plasma (plasmasphere and plasmatrough), with an average error of 0.65. The data set on which this result is based is limited to 2.5RE ≤ Rmax ≤ 8.5RE, 2RE ≤ R ≤ Rmax, and 2 ≤ ne0 ≤ 1500 cm−3. There is no remaining dependence of the average α – αmodel on MLT or Kp.</description><subject>Categories</subject><subject>Electron density</subject><subject>field line dependence</subject><subject>Geophysics</subject><subject>Magnetospheric electron density</subject><subject>Plasma waves</subject><subject>Plasmasphere</subject><subject>Polar spacecraft</subject><subject>Power law</subject><subject>PWI</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><recordid>eNp90M1Og0AUBeCJ0cRa3fkArIwL0Tu_zCy1sVSDmjQalxMYLopSQIZG-_ZiMMZVV_cuvnMWh5BjCucUmLlgACxOgEqj-A6ZUCNEqAGiXTIBMMPPIrVPDrx_AwAOnE6InpdY5UFV1hjk2GKdY-0waIpglb7U2De-fcWudAFW6PquqQdV-7LfHJK9Iq08Hv3eKXmaXz_OFmHyEN_MLpPQSSZpaJSWhSqKTKUGiojlCiVXUghBOYosSyUoKBxgxoQGRMyUyCSXjkaRplLxKTkZe9uu-Vij7-2q9A6rKq2xWXvLtKbKgBjg6VZIJTOGSUXlQM9G6rrG-w4L23blKu02loL9WdL-X3LgbOSfZYWbrdbGy4QqpukQCsdQ6Xv8-gul3btVEY-kfb6PLV3Anbq90nbJvwEl14Gn</recordid><startdate>200212</startdate><enddate>200212</enddate><creator>Denton, R. E.</creator><creator>Goldstein, J.</creator><creator>Menietti, J. D.</creator><general>Blackwell Publishing Ltd</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>KR7</scope><scope>L7M</scope></search><sort><creationdate>200212</creationdate><title>Field line dependence of magnetospheric electron density</title><author>Denton, R. E. ; Goldstein, J. ; Menietti, J. D.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c5251-9685f6ffb6a90f72d6e536544413e4bba5060fc0eb2480eeeb64b535c17781563</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2002</creationdate><topic>Categories</topic><topic>Electron density</topic><topic>field line dependence</topic><topic>Geophysics</topic><topic>Magnetospheric electron density</topic><topic>Plasma waves</topic><topic>Plasmasphere</topic><topic>Polar spacecraft</topic><topic>Power law</topic><topic>PWI</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Denton, R. E.</creatorcontrib><creatorcontrib>Goldstein, J.</creatorcontrib><creatorcontrib>Menietti, J. D.</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Denton, R. E.</au><au>Goldstein, J.</au><au>Menietti, J. D.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Field line dependence of magnetospheric electron density</atitle><jtitle>Geophysical research letters</jtitle><addtitle>Geophys. Res. Lett</addtitle><date>2002-12</date><risdate>2002</risdate><volume>29</volume><issue>24</issue><spage>58-1</spage><epage>58-4</epage><pages>58-1-58-4</pages><issn>0094-8276</issn><eissn>1944-8007</eissn><abstract>Observations of the electron density ne based on measurement of the upper hybrid resonance frequency by the Polar spacecraft Plasma Wave Instrument (PWI) are available for March, 1996 to September, 1997, during which time the Polar orbit sampled all MLT values three times. Using this data set, we assume a power law form for the electron density dependence along field lines ne = ne0 (Rmax/R)α, where ne0 is the equatorial electron density and Rmax ≈ LRE is the maximum geocentric radius R to any point on the field line, and model the statistical average of α as αmodel = 8.0 − 3.0 log10ne0 + 0.28 (log10ne0)2 − 0.43(Rmax/RE) for all categories of plasma (plasmasphere and plasmatrough), with an average error of 0.65. The data set on which this result is based is limited to 2.5RE ≤ Rmax ≤ 8.5RE, 2RE ≤ R ≤ Rmax, and 2 ≤ ne0 ≤ 1500 cm−3. There is no remaining dependence of the average α – αmodel on MLT or Kp.</abstract><pub>Blackwell Publishing Ltd</pub><doi>10.1029/2002GL015963</doi><tpages>4</tpages><oa>free_for_read</oa></addata></record> |
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| source | Wiley Free Content; Wiley-Blackwell AGU Digital Library; Wiley Online Library Journals Frontfile Complete; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Categories Electron density field line dependence Geophysics Magnetospheric electron density Plasma waves Plasmasphere Polar spacecraft Power law PWI |
| title | Field line dependence of magnetospheric electron density |
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