Open AccessEffects of neutral wind on the electron temperature at a height of 600 km in the low latitude region
Author(s) -
Shigeto Watanabe,
K.I. Oyama
Publication year - 1996
Publication title -
annales geophysicae
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.522
H-Index - 93
eISSN - 1432-0576
pISSN - 0992-7689
DOI - 10.1007/s00585-996-0290-5
Subject(s) - morning , atmospheric sciences , local time , latitude , overshoot (microwave communication) , ionosphere , geomagnetic latitude , declination , sunset , earth's magnetic field , evening , low latitude , northern hemisphere , solar wind , environmental science , geology , physics , geodesy , geophysics , astrophysics , optics , magnetic field , astronomy , mathematics , statistics , engineering , quantum mechanics , electrical engineering
Electron temperature observed by the Hinotori\udsatellite with the low inclination at the height of ~600 km was studied in\udterms of local time, season, latitude, magnetic declination and solar flux\udintensity during a 16-month period from 1981 to 1982. The electron temperatures\udshow steep rise in the early morning (well known as morning overshoot), decrease\udafter that and again increase at ~18 hours (hereafter named as evening\udovershoot). Generally the morning overshoot becomes more enhanced in the winter\udhemisphere and for higher solar fluxes. The evening overshoot becomes more\udpronounced in the mid-latitude in all seasons and more enhanced in the winter\udhemisphere in the same way as the morning overshoot. A difference is seen\udbetween 210°–285° and 285°–360° longitudes where magnetic declination is\uddifferent. The longitudinal dependence of electron temperature indicates that\udthe neutral wind also contributes to the thermal structure in the low latitude\udionosphere