Synonyms were used for: Solar Activity
Search without synonyms: title: Solar Activity Observations and Predictions

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    Accuracy of IRI profiles of ionospheric density and temperatures derived from comparisons to Kharkov incoherent scatter radar measurements

    Cherniak, Iu.V. / Zakharenkova, I.E. / Dzyubanov, D.A. | Elsevier | 2011
    representation accuracy improves significantly when IRI is driven by observed-averaged values of the solar activity index rather than their predictions ...
    Keywords: Solar cycle , Solar indices

    A model of foreground emission in UV using GALEX deep observations

    Narayanan, Nimmi / Menon, Shivashankar S. / N.V., Sujatha | Elsevier | 2022
    model of airglow emission, derived from GALEX deep observations, as a function of 10.7 cm Solar flux and Sun angle. We obtained the model by ...
    Keywords: Solar activity , Solar cycle , Astronomical space missions and instrumentation

    An empirical model for the ionospheric electron content at low latitude in Brazil and a comparison with IRI95

    Souza, J.R. / Abdu, M.A. / Batista, I.S. | Elsevier | 2003
    ∼ 1 hour earlier than observations at all seasons and at all solar activity levels. IRI overestimates the values of TEC for all local times ...

    A regional model for the prediction of M(3000)F2 over East Asia

    Wang, Jian / Feng, Feng / Bai, Hong-mei et al. | Elsevier | 2020
    activity parameters of sunspot number and the 10.7-cm solar radio flux are together introduced into temporal reconstruction. (2) Both the ...

    Assessment of IRI-2016 hmF2 model predictions with COSMIC observations over the African region

    Moses, Mefe / Bilitza, Dieter / Panda, Sampad Kumar et al. | Elsevier | 2020
    during quiet geomagnetic conditions under both low and high solar activity periods. However, the average performance declines during disturbed ...

    Calculations and observations of solar particle enhancements to the radiation environment at aircraft altitudes

    Dyer, C.S. / Lei, F. / Clucas, S.N. et al. | Elsevier | 2003
    . Predictions for all events show very steep dependencies on both latitude and altitude. At high latitude and altitude (17 km) calculated increases with ...

    Characterize the long-term ionospheric response to the changes in solar activity at low-latitude stations of the East African Sector

    Woldemariam, Shumet Workie / Gogie, Tsegaye Kassa | Elsevier | 2023
    We examine the long-term ionospheric response to solar conditions from 2009–2019 ...
    Keywords: Solar-activity , Solar-cycle-24

    Comparison of GPS-TEC observations over Addis Ababa with IRI-2012 model predictions during 2010–2013

    Akala, A.O. / Somoye, E.O. / Adewale, A.O. et al. | Elsevier | 2015
    . TEC increases with solar activity, and of all the three options of IRI-2012, NeQuick was most accurate. ...
    Keywords: Solar activity

    Comparison of ionospheric F2 peak parameters foF2 and hmF2 with IRI2001 at Hainan

    Wang, X. / Shi, J.K. / Wang, G.J. et al. | Elsevier | 2008
    sunrise to about noon. It seems that there are bigger deviations between IRI Model predictions and the experimental observations for the moderate ...

    Comparison of IRI model predictions with low latitude ionospheric observations

    Bittencourt, J.A. / Chryssafidis, M. | Elsevier | 1991
    Abstract During a period of high solar activity (1979/1980), IRI ...

    Comparison of peak characteristics of F2 ionospheric layer over Tehran region at a low solar activity period with IRI-2001 and IRI-2007 models predictions

    Karami, Kh. / Ghader, S. / Raeen, A. | Elsevier | 2011
    height of F2 ionospheric layer (hmF2) over Tehran region at a low solar activity period are compared with the predictions of the International ...
    Keywords: Ionospheric modeling and prediction

    Comparison of the main ionospheric characteristics measured by the digisonde at Irkutsk in 2003 with IRI 2001 model data

    Oinats, A.V. / Kotovich, G.V. / Ratovsky, K.G. | Elsevier | 2005
    ways of solar activity specification in IRI to improve its prediction quality. In addition to the standard technique of using 12 monthly ...
    Keywords: Solar activity

    Comparison of two IRI electron-density plasmasphere extensions with GPS-TEC observations

    Gulyaeva, T.L. / Gallagher, D.L. | Elsevier | 2007
    , measurements have been carried out for different latitudinal, solar activity, magnetic activity, diurnal, and seasonal conditions. The models evaluated ...

    Comparisons of foF2 with IRI model and equatorial vertical drifts

    Oyekola, O.S. | Elsevier | 2011
    results reveal that the present version of IRI essentially reproduces diurnal trends and the general features of the experimental observations for ...
    Keywords: High solar activity

    Concepts of medium-range (1–3 days) geomagnetic forecasting

    Gleisner, Hans / Watermann, Jürgen | Elsevier | 2005
    field component–days ahead from remote observations of the inner heliosphere. This is, however, not feasible and will not ...
    Keywords: Solar-wind model

    Diurnal and seasonal variations of F2 layer characteristics over Irkutsk during the decrease in solar activity in 2003–2006: Observations and IRI-2001 model predictions

    Ratovsky, K.G. / Oinats, A.V. / Medvedev, A.V. | Elsevier | 2008
    medians. The comparison with the IRI-2001 model during the decrease in solar activity in 2003–2006 revealed cases of both close agreement and ...
    Keywords: Diurnal and seasonal variations , Solar activity dependence

    Diurnal variations of the ionospheric electron density height profiles over Irkutsk: Comparison of the incoherent scatter radar measurements, GSM TIP simulations and IRI predictions

    Zherebtsov, G.A. / Ratovsky, K.G. / Klimenko, M.V. et al. | Elsevier | 2016
    for 4 four seasons (winter, spring, summer, autumn) and for two solar activity levels (low and moderate). Considering these electron density ...

    Early Recognition of Major Solar Flares in H<*

    Mclntosh, Patrick S. / Dryer, Murray | AIAA | 1972
    disturbances created by solar activity. In addition to the disruption of radio communications, the sun can create hazards to men and their space ...
    Publisher: The American Institute of Aeronautics and Astronautics

    Effects of Solar Particle Events on the Energetic Particle Population in the Earth's Magnetosphere

    Mclntosh, Patrick S. / Dryer, Murray | AIAA | 1972
    disturbances created by solar activity. In addition to the disruption of radio communications, the sun can create hazards to men and their space ...
    Publisher: The American Institute of Aeronautics and Astronautics