000 01721nam a2200289 4500
999 _c13410
_d13410
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040 _apeliigp
_bspa
_cpeliigp
041 _aeng
082 0 4 _a551.514/C512
100 1 _95152
_aChacko, C. C.
_eautor
245 1 0 _aHigh latitude ionospheric gradients and their relationships to auroral and magnetospheric boundaries
260 _aMassachusetts:
_bAir Force Geophysics Laboratory,
_c1977
300 _a57 páginas:
_bgráficas;
_c30 cm
500 _aNúmero de reporte: AFGL-TR-78-0092(I)
504 _aIncluye bibliografía
505 _aChapter 1. Introduction -- Chapter 2. The Baselevel Ionospheric Trough -- Chapter 3. Electron Density enhancements in the F-Region Beneath the magnetospheric cusp -- Chapter 4. The equatorward edge of the diffuse aurora and the poleward wall of the main electron density trough: case study investigations
520 _aThe main electron density trough in the topside ionosphere is investigated using ISIS 2 topside sounder data, DMSP auroral images and ground-based observations. A "base-level" ionospheric trough is characterized with the aid of ISIS 2 electron densities obtained in December 1971 under an optimun set of geophysical conditions, namely midwinter, local midnight and very quiet magnetospheric intervals. The statistical positions of the equatorward and poleward walls of the trough are examined in relation to the plasmapause and various auroral boundaries, respectively.
650 1 4 _9315
_aIONOSFERA
650 2 4 _91794
_aAURORAS
653 _aPLASMASFERA
700 1 _93772
_aMendillo, Michael
_eautor
910 _aphc
942 _2ddc
_cBK