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OGO 4 observations of ion composition and temperatures in the topside ionosphere

1970; American Geophysical Union; Volume: 75; Issue: 19 Linguagem: Inglês

10.1029/ja075i019p03867

2156-2202

S. Chandra, B. E. Troy, J. L. Donley, R. E. Bourdeau,

Astro and Planetary Science

Journal of Geophysical Research (1896-1977)Volume 75, Issue 19 p. 3867-3878 OGO 4 observations of ion composition and temperatures in the topside ionosphere S. Chandra, S. ChandraSearch for more papers by this authorB. E. Troy Jr., B. E. Troy Jr.Search for more papers by this authorJ. L. Donley, J. L. DonleySearch for more papers by this authorR. E. Bourdeau, R. E. BourdeauSearch for more papers by this author S. Chandra, S. ChandraSearch for more papers by this authorB. E. Troy Jr., B. E. Troy Jr.Search for more papers by this authorJ. L. Donley, J. L. DonleySearch for more papers by this authorR. E. Bourdeau, R. E. BourdeauSearch for more papers by this author First published: 1 July 1970 https://doi.org/10.1029/JA075i019p03867Citations: 44AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract Direct measurement of the densities of ionic constituents (H+, He+, and O+) and the temperatures of ions and electrons have been obtained from the Ogo 4 planar retarding potential analyzer in the altitude range 400–900 km. Results are presented from day and night passes in the middle and low latitudes near the 1967 fall equinox. The passes are selected to empasize the latitudinal rather than the height dependence of the measurements. The main results can be summarized as follows: (1) Above 800 km at night, there is a deep equatorial trough in He+ and a corresponding rise in O+, suggesting a charge exchange between He+ and O as an important loss mechanism for He+. (2) The dominant ion in the night at these altitudes between ±40° geomagnetic latitudes is H+ followed generally by O+ and He+. Outside this latitude region O+ becomes the dominant constituent, increasing continuously toward the pole. (3) The major ionic constituent in the daytime is O+ throughout the altitude and latitude range of observations. In the height range 400–500 km, the latitudinal variation in O+ shows the well-known feature of the geomagnetic anomaly. (4) Both electron and ion temperatures generally increase poleward from their low latitude values, attaining maxima between 40 and 50° geomagnetic latitude. References Bates, D. R., T. N. L. Patterson, Helium ions in the upper atmosphere, Planet. Space Sci., 9, 599, 1962. Bauer, S. J., Chemical processes involving helium ions and the behavior of atomic nitrogen ions in the upper atmosphere, J. Geophys. Res., 71, 1508, 1966. Bauer, S. J., Rocket and satellite experiments in the magnetosphere, Handb. Phys., 49, IV/4, 1970. Bourdeau, R. E., E. C. Whipple Jr., J. L. Donley, S. J. Bauer, Experimental evidence for the presence of helium ions based on Explorer 8 satellite data, J. Geophys. Res., 67, 467, 1962. Bowen, P. J., R. L. F. Boyd, W. J. Raitt, A. P. Willmore, Ion composition of the upper F-region, Proc. Royal Soc., 281, 504, 1964. Brace, L. H., B. M. Reddy, H. G. Mayr, Global behavior of the ionosphere at 1000-kilometer altitude, J. Geophys. Res., 72, 265, 1967. Bramley, E. N., M. Peart, Diffusion and electromagnetic drift in the equatorial F2 region, J. Atmos. Terr. Phys., 27, 1201, 1965. Brinton, H. C., M. W. Pharo III, H. G. Mayr, H. A. Taylor Jr., Implication for ionospheric chemistry and dynamics of a direct measurement of ion composition in the F2 region, J. Geophys. Res., 74, 2941, 1969a. Brinton, H. C., R. A. Pickett, H. A. Taylor; Jr., Diurnal and seasonal variations of atmospheric ion composition: Correlation with solar zenith angle, J. Geophys. Res., 74, 4064, 1969b. Chandra, S., R. A. Goldberg, Geomagnetic control of diffusion in the upper atmosphere, J. Geophys. Res., 69, 3187, 1964. Chandra, S., S. Rangaswamy, Geomagnetic and solar control of ionization at 1000 km, J. Atmos. Terr. Phys., 29, 259, 1967. Cohen, R., The equatorial ionosphere, Physics of Geomagnetic Phenomena S. Matsushita, W. Campbell, 561, Academic Press, New York, 1967. Colin, L., S. W. Dufour, D. S. Willoughby, An interpretation of Ogo light ion abundance measurements, J. Geophys. Res., 74, 1863, 1969. Dalgarno, A., Thermal reactions involving charged particles, Discuss. Faraday Soc., 37, 142, 1964. Donley, J. L., L. H. Brace, J. A. Findlay, J. H. Hoffman, G. L. Wrenn, Comparison of results of Explorer 31 direct measurement probes, Proc. IEEE, 57, 1078, 1969. Eccles, D., J. W. King, A review of the topside sounder studies of the equatorial ionosphere, Proc. IEEE, 57, 1012, 1969. Goldberg, R. A., A review of the theories concerning the equatorial F2 region ionosphere, Proc. IEEE, 57, 1119, 1969. Gordon, W. E., F region and magnetosphere backscatter results, Rev. Geophys., 5, 191, 1967. Hanson, W. B., R. J. Moffett, Ionization transport effects in the equatorial F region, J. Geophys. Res., 71, 5559, 1966. Hoffman, J. H., Composition measurements of the topside ionosphere, Science, 155, 322, 1967. Istomin, V. G., Variation in the positive ion concentration with altitude from data of mass spectrometry measurements on the third satellite, Planet, Space Sci., 8, 179, 1961. Istomin, V. G., Observational results on atmospheric ions in the region of the outer ionosphere, Ann. Geophys., 22, 255, 1966. Kendall, P. C., D. W. Windle, A possible explanation of the Appleton anomaly of the F2 layer: Dougherty's theory of ion drag, J. Atmos. Terr. Phys., 27, 795, 1965. Maier, E. J. R., Sounding rocket measurements of ion composition and charged particle temperatures in the topside ionosphere, J. Geophys. Res., 74, 815, 1969. Maier, E. J., B. C. Narasinga Rao, Observations of the suprathermal electron flux and the electron temperature at high latitudesfall URSI meetingAustin, Texas, 1969. Maier II, W. B. ,II, Reactions of He+ with N2 and O2 in the upper atmosphere, Planet. Space Sci., 16, 477, 1968. Moss, S. J., E. Hyman, Minimum variance technique for the analysis of ionospheric data acquired in satellite retarding potential analyzer experiments, J. Geophys. Res., 73, 4315, 1968. Nicolet, M., Helium, an important constituent in the lower exosphere, J. Geophys. Res., 66, 2263, 1961. Serbu, G. P., E. J. R. Maier, Low-energy electrons measured on Imp 2, J. Geophys. Res., 71, 3755, 1966. Taylor Jr., H. A., H. C. Brinton, M. W. Pharo III, N. K. Rahman, Thermal ions in the exosphere: Evidence of solar and geomagnetic control, J. Geophys. Res., 73, 5521, 1968. Whipple Jr., E. C., L. W. Parker, Theory of an electron trap on a charged spacecraft, J. Geophys. Res., 74, 2962, 1969a. Whipple Jr., E. C., L. W. Parker, Theory of ion collection by traps and mass spectrometers with attractive apertures on moving charged spacecraft (abstract), Trans. Am. Geophys. Union, 5011, 652, 1969b. Windle, D. W., P. C. Kendall, A possible explanation of the Appleton anomaly of the F2 layer, 2, A model with unequal horizontal velocities, J. Atmos. Terr. Phys., 27, 1163, 1965. Citing Literature Volume75, Issue19Space Physics1 July 1970Pages 3867-3878 ReferencesRelatedInformation