SemOpenAlex |

SemOpenAlex

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4255778821> ?p ?o ?g. }

Showing items 1 to 77 of 77 with 100 items per page.

W4255778821 endingPage "327" @default.
W4255778821 startingPage "327" @default.
W4255778821 abstract "Abstract. Measurements of F-region electron density and temperature at Millstone Hill are compared with results from the IZMIRAN time-dependent mathematical model of the Earth's ionosphere and plasmasphere during the periods 16â23 March and 6â12 April 1990. Each of these two periods included geomagnetically quiet intervals followed by major storms. Satisfactory agreement between the model and the data is obtained during the quiet intervals, provided that the recombination rate of O+(4S) ions was decreased by a factor of 1.5 at all altitudes during the nighttime periods 17â18 March, 19â20 March, 6â8 April and 8â9 April in order to increase the NmF2 at night better to match observations. Good model/data agreement is also obtained during the storm periods when vibrationally excited N2 brings about factor-of-2-4 reductions in daytime NmF2. Model calculations are carried out using different expressions for the O+ â O collision frequency for momentum transfer, and the best agreement between the electron-density measurements and the model results is obtained when the CEDAR interim standard formula for the OÂ+ â O collision frequency is used. Deviations from the Boltzmann distribution for the Â®rst Â®ve vibrational levels of N2 collision frequency is used. Deviations from the Boltzmann distribution for the first five vibrational levels of j were calculated. The calculated distribution is highly non-Boltzmann at vibrational levels j > 2 and the Boltzmann distribution assumption results in the increase of 10â30% in calculated NmF2 during the storm-time periods. During the March storm at solar maximum the model results obtained using the EUVAC solar flux model agree a little better with the observations in comparison with the EUV94 solar flux model. For the April storm period of moderate solar activity the EUV94X model results agree better with the observations in comparison to the EUVAC model." @default.
W4255778821 created "2022-05-12" @default.
W4255778821 creator A5008167920 @default.
W4255778821 creator A5076391492 @default.
W4255778821 date "1997-01-01" @default.
W4255778821 modified "2023-09-24" @default.
W4255778821 title "Comparison of model electron densities and temperatures with Millstone Hill observations during undisturbed periods and the geomagnetic storms of 16–23 March and 6–12 April 1990" @default.
W4255778821 doi "https://doi.org/10.1007/s005850050447" @default.
W4255778821 hasPublicationYear "1997" @default.
W4255778821 type Work @default.
W4255778821 citedByCount "0" @default.
W4255778821 crossrefType "journal-article" @default.
W4255778821 hasAuthorship W4255778821A5008167920 @default.
W4255778821 hasAuthorship W4255778821A5076391492 @default.
W4255778821 hasBestOaLocation W42557788211 @default.
W4255778821 hasConcept C112951337 @default.
W4255778821 hasConcept C115260700 @default.
W4255778821 hasConcept C116403925 @default.
W4255778821 hasConcept C118691173 @default.
W4255778821 hasConcept C121332964 @default.
W4255778821 hasConcept C125485243 @default.
W4255778821 hasConcept C130443932 @default.
W4255778821 hasConcept C147120987 @default.
W4255778821 hasConcept C170641098 @default.
W4255778821 hasConcept C184779094 @default.
W4255778821 hasConcept C185544564 @default.
W4255778821 hasConcept C199635899 @default.
W4255778821 hasConcept C2778732512 @default.
W4255778821 hasConcept C35304006 @default.
W4255778821 hasConcept C58300830 @default.
W4255778821 hasConcept C62520636 @default.
W4255778821 hasConcept C8058405 @default.
W4255778821 hasConcept C82706917 @default.
W4255778821 hasConcept C91586092 @default.
W4255778821 hasConcept C97355855 @default.
W4255778821 hasConceptScore W4255778821C112951337 @default.
W4255778821 hasConceptScore W4255778821C115260700 @default.
W4255778821 hasConceptScore W4255778821C116403925 @default.
W4255778821 hasConceptScore W4255778821C118691173 @default.
W4255778821 hasConceptScore W4255778821C121332964 @default.
W4255778821 hasConceptScore W4255778821C125485243 @default.
W4255778821 hasConceptScore W4255778821C130443932 @default.
W4255778821 hasConceptScore W4255778821C147120987 @default.
W4255778821 hasConceptScore W4255778821C170641098 @default.
W4255778821 hasConceptScore W4255778821C184779094 @default.
W4255778821 hasConceptScore W4255778821C185544564 @default.
W4255778821 hasConceptScore W4255778821C199635899 @default.
W4255778821 hasConceptScore W4255778821C2778732512 @default.
W4255778821 hasConceptScore W4255778821C35304006 @default.
W4255778821 hasConceptScore W4255778821C58300830 @default.
W4255778821 hasConceptScore W4255778821C62520636 @default.
W4255778821 hasConceptScore W4255778821C8058405 @default.
W4255778821 hasConceptScore W4255778821C82706917 @default.
W4255778821 hasConceptScore W4255778821C91586092 @default.
W4255778821 hasConceptScore W4255778821C97355855 @default.
W4255778821 hasIssue "3" @default.
W4255778821 hasLocation W42557788211 @default.
W4255778821 hasLocation W42557788212 @default.
W4255778821 hasLocation W42557788213 @default.
W4255778821 hasOpenAccess W4255778821 @default.
W4255778821 hasPrimaryLocation W42557788211 @default.
W4255778821 hasRelatedWork W1651334967 @default.
W4255778821 hasRelatedWork W1973938694 @default.
W4255778821 hasRelatedWork W2004739905 @default.
W4255778821 hasRelatedWork W2065949764 @default.
W4255778821 hasRelatedWork W2072894145 @default.
W4255778821 hasRelatedWork W2080180330 @default.
W4255778821 hasRelatedWork W2212609344 @default.
W4255778821 hasRelatedWork W2483963876 @default.
W4255778821 hasRelatedWork W2885275652 @default.
W4255778821 hasRelatedWork W2962360506 @default.
W4255778821 hasVolume "15" @default.
W4255778821 isParatext "false" @default.
W4255778821 isRetracted "false" @default.
W4255778821 workType "article" @default.