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

61–80 of 82 hits
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    The heliospheric modulation of 3–10 MeV electrons: Modeling of changes in the solar wind speed in relation to perpendicular polar diffusion

    Moeketsi, D.M. / Potgieter, M.S. / Ferreira, S.E.S. et al. | Elsevier | 2005
    to model the KET observations realistically during periods of increased solar activity by applying an advanced three-dimensional, steady ...
    Keywords: Solar activity , Solar wind speed

    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

    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 ...

    Variability of the bottomside B0 and B1 parameters of ionospheric electron density profile over Cyprus and comparison with IRI-2012 model

    Panda, Sampad Kumar / Haralambous, Haris | Elsevier | 2016
    under low and high solar activity conditions. Observations show significant day-to-day variations in their magnitudes manifesting relatively ...
    Keywords: B0 and B1 parameters

    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

    Analysis of sea level changes in the Caspian Sea related to Cosmo-geophysical processes based on satellite and terrestrial data

    Free access
    Vladimir Kaftan / Boris Komitov / Sergey Lebedev | DOAJ | 2018
    solar activity characteristics, magnetic field data, and length of day are presented. Spectra of the indicated processes were investigated and ...

    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

    The heliospheric hydrogen wall and astrospheres

    Wood, B.E / Müller, H.-R / Zank, G.P et al. | Elsevier | 2003
    with stellar age and activity. Thus, we also review these astrospheric results and discuss their ramifications for solar, stellar, and ...

    Variation in the ionospheric propagating factor M(3000)F2 at Ouagadougou, Burkina Faso

    Oyekola, O.S. | Elsevier | 2010
    better predictions for M(3000)F2 between 0900 and 1500LT during equinox low and high solar activity and equinox high sunspot number ...
    Keywords: Solar activity

    Orbit Analysis and Lifetime Prediction Using Radar Data by Reentry of Salyut-7/Kosmos-1686

    W. Liewehr / H. G. Peters / D. Mehrholz | NTIS | 1991
    attitude are presented. The influence of solar activity on low Earth orbits is shown. The robustness and reliability of the analysis methods is ...
    Keywords: Predictions , Solar activity effects

    Evaluation of the performance of F-layer peak height models used in IRI-2016 over the Indian equatorial and low latitudes

    Venkatesh, K. / Pallamraju, D. / Dalsania, Kelvy P. et al. | Elsevier | 2023
    Ahmedabad (23.0 °N, 72.5 °E) along with GPS observations over Colombo (6.8 °N, 79.8 °E) and Ahmedabad during a high solar activity year 2014 are ...

    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 ...

    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 ...

    The quiet nighttime low-latitude ionosphere as observed by TIMED/GUVI

    Talaat, E.R. / Yee, J.-H. / Hsieh, S.-Y. et al. | Elsevier | 2012
    structure in the low latitude region and discrepancies between Global Ultraviolet Imager (GUVI) observations and the IRI model predictions using (1 ...

    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

    Plasma tail evolution in Comet P/Halley 1985-1986

    Brandt, J. C. / Niedner, M. B., Jr. | NTRS | 1989
    Watch. The evolution of the plasma tail is discussed, focusing on the turn-on/turn-off of plasma tail activity, and observations of ...
    Publisher: NASA National Aeronautics and Space Administration

    Regional modeling of ionospheric peak parameters using GNSS data—An update for IRI

    Liang, Wenjing / Limberger, Marco / Schmidt, Michael et al. | Elsevier | 2014
    days under high solar activity (1 July 2012), moderate solar activity (16 July 2011) and low solar activity (16 July 2008), respectively. A ...

    Prediction tests by using “ISF” method for the geomagnetic disturbances

    Wei, Fengsi / Feng, Xueshang / Ya, Xu et al. | Elsevier | 2004
    scintillation (I) and geomagnetic disturbance observations during the period 1966–1982 together with the dynamics of solar wind storm propagation (S ...

    Plasma tail evolution in comet P/Halley 1985–1986

    Brandt, J.C. / Niedner, M.B. Jr | Elsevier | 1989
    : (1) the turn-on/turn-off of plasma tail activity and (2) the extensive observations of disconnection events ...

    Overview of Advanced Space Propulsion Activities in the Space Environmental Effects Team at MSFC

    Edwards, David / Carruth, Ralph / Vaughn, Jason et al. | NTRS | 2000
    the effect of changes in magnetic field structure, beam current, and gas species. Experimental observations will be compared to predictions ...
    Publisher: NASA National Aeronautics and Space Administration
    Keywords: Spacecraft Propulsion And Power