Tec climatology derived fromtopex/poseidonmeasurements |
| |
| Institution: | 1. Cooperative Institute for Research in EnvironmentalSciences,University of Colorado, and NOAA, Space EnvironmentCenter,Boulder, Colorado, USA;2. Department of Aerospace Engineering, University ofColorado,Boulder, Colorado, USA;1. Institute of Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, Athens, Greece;2. Bulgarian Academy of Sciences, Sofia, Bulgaria;3. Institute of Information and Communication Technologies, Bulgarian Academy of Sciences, Sofia, Bulgaria;1. West Department of Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation RAS, Pobedy Av., 41, Kaliningrad, 236017, Russia;2. Department of Radiophysics and Information Safety, Immanuel Kant Baltic Federal University, Nevsky Str., 14a, Kaliningrad, 236000, Russia;3. Polar Geophysical Institute, Khalturina Str., 15, Murmansk, 183010, Russia;4. Faculty of Physics, Moscow State University, Vorobjovy Gory, Moscow, 119992, Russia;5. Institute of Solar-Terrestrial Physics, SB RAS, Lermontov Str., 126a, Irkutsk, 664033, Russia;1. School of Geographical Science, Guangzhou University, Guangzhou 510006, China;2. School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China;1. Faculty of Education, Mus Alparslan University, 49250 Mus, Turkey;2. Independent researcher, Bingöl, Turkey;3. Department of Physics, Faculty of Science and Art, Mus Alparslan University, 49250 Mus, Turkey;1. Instituto Tecnológico de Aeronáutica – ITA, São José dos Campos, SP, Brazil;2. William B. Hanson Center for Space Sciences, University of Texas at Dallas – UT Dallas, Richardson, TX;3. Instituto de Aeronáutica e Espaço - IAE São José dos Campos, SP, Brazil |
| |
| Abstract: | We have used the TOPEX data sets available from JPL to create a customizeddatabase of the TOPEX TEC measurements that contain data from 1992 through part of 1996.Thedata base includes time, geographic and geomagnetic coordinates of themeasurement,geomagnetic indices (Kp, previous Kp, HemisphericPower, andintegral of hemispheric power over the previous 36 h), solar index (F 10.7),andInternational Reference Ionosphere (IRI) results corresponding to the TOPEX measurements.Inthis paper we present global maps of TEC for low solar activity conditions (F 10.7 ⩽ 120) for quiet (integral of hemispheric power less than 800 GWh, roughly correspondingto Kp = 2), moderately disturbed (integral of hemispheric power greaterthan 800GWh but less than 1200 GWh, roughly corresponding to Kp = 3),anddisturbed (integral of hemispheric power greater than 1200 GWh, roughly corresponding to Kp = 4) geomagnetic conditions, derived by binning all appropriateTOPEX TECdata from 1992 to 1996. The analysis is performed in a Magnetic-Local-Time,Magnetic-Latitudecoordinate system. The most prominent feature of the global TEC maps is thefeaturecorresponding to the equatorial anomaly. The feature becomes wider in magnetic latitudeandmore pronounced in amplitude as the activity level increases. The equatorward shift of thecrests,with increased magnetic activity, can produce apparent decreases in TEC at their quiettimelocation for individual storms as evident in the conflicting conclusions of TECgeomagneticdependence studies of the 1960s. For the same activity level, TEC values in theequatorialanomaly are higher during equinox compared to solstice. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
