Abstract
Nitric oxide concentration in the upper D-region is estimated by comparing empirically derived ratios of Lyman-α and X-ray contributions to the total radio-wave absorption (2775 kHz. A3 method) in medium latitudes with model ratios. Typical NO concentrations are about 8.5×1013 m−3, at 90 km and 6.5×1013 m−3 at 78 km. These values are higher than generally accepted model NO concentrations, but lie within the broad range of experimental values.
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Baker, K. D., Nagy, A.F., Olsen, R. O., Oran, E. S., Randhawa, J., Strobel, D. F., andTohmatsu, T. (1977),Measurement of the Nitric Oxide Altitude Distribution in the Midlatitude Mesosphere, J. geophys. Res.82, 3281–3286.
Bremer, J., andSinger, W. (1974)Bestimmung mittleren Elektronenkonzentrationsprofile der Ionosphärischen D-Schicht mit Hilfe von Funkwellenausbreitungsmessungen, Gerlands Beitr. Geophys.83, 217–236.
Carver, J. H., Horton, B. H., Ilyas, M., andLewis, B. R. (1977),Molecular Oxygen Densities and the Atmospheric Absorption of Solar Lyman-α Radiation, J. geophys. Res.82, 2613–2618.
Culhane, J. L., Sanford, P. W., Shaw, M. L., Phillips, K. J. H., Willmore, A. P., Bowen, P. J., Pounds, K. A., andSmith, D. C. (1969),A Study of the Solar Soft X-Ray Spectrum, Mon. Notes R. Astr. Soc.145, 435–455.
Dere, K. P., Horan, D. M. andKreplin R. W. (1974),The Spectral Dependence of Solar Soft X-Ray Flux Values Obtained by SOLRAD 9 J. atmos. terr. Phys.36, 989–994.
Evans, W. F. J., andLlewellyn, E. J. (1970),Molecular Oxygen Emission in the Airglow, Ann. Géophys.26, 167–178.
Hall, J. R. (1972),Atmospheric Pressure, Density and Scale Height Calculated from the H Lyman-α Absorption allowing for the Variation in Cross Section with Wavelength, J. atmos. terr. Phys.34, 1337–1348.
Huffman, R. E., Paulsen, D.E., Larrabee, J. C., andCairns, R. D. (1971), Decrease in D-RegionO 2(1Δ g ) Photoionization Rates Resulting from CO2 Absorption, J. geophys. Res76, 1028–1038.
Iwagami, N., andOgawa, T. (1980),An Antarctic NO Density Profile Deduced from the Gamma Band Airglow, Planet. Space Sci.28, 867–873.
Laštovička, J. (1975),Calculation of the Upper D-Region Ionization by Various Ionization Sources, Travaux Géophys.1973, 431–446, Academia, Prague.
Laštovička, J. (1976a),The Dependence of the Ionospheric Absorption at 2775 kHz on the Intensity of Ionizing Radiation-Ionospheric Implications, Pure Appl. Geophys.114, 321–331.
Laštovička, J. (1976b),On some Sources of Uncertainty in the Lyman-α Ionization-Rate Calculation, Studia geophys. geod.20, 273–283.
Laštovička, J., andBoška, J. (1982),Dominant Role of Solar Lyman-α in Radio-Wave Absorption in the D-Region, J. atmos. terr. Phys.44, 793–795.
Laštovička, J., andKlas, J. (1976),Calculation of the Absorption Height Profile for the 2775 kHz Kiel-Panská Ves Circuit, Travaux Géophys.1974, 355–368, Academia, Prague.
Maeda, K. (1969),Mid-Latitude Electron Density Profiles as Revealed by Rocket Experiments J. Geomagn. Geolect., Kyoto21, 557–567.
Manson, J. E. (1976),The Solar Extreme Ultraviolet between 30 and 205 A on November 9, 1971, Compared with Previous Measurements in this Spectral Region, J. geophys. Res.81 1629–1635.
Massie, S. T. (1980),Nitric Oxide Delta Bend Absorption Measurements in the Lower Thermosphere J. geophys. Res.A85, 2155–2164.
Mechtly, E. A. andSmith, L. G. (1970),Changes of Lower Ionosphere Electron Densities with Solar Zenith Angle, Radio Sci.5., 1407–1421.
Meira, L. G. (1971),Rocket Measurements of Upper Atmospheric Nitric Oxide and their Consequences to the Lower Ionosphere, J. geophys. Res.76, 202–212.
Pontano, B. A., andHale, L. C. (1970),Measurements of N Ionizable Constitutents of the Low Ionosphere using a Lyman-α Source and Blunt Probe, Space Res.X, 208–214, North Holland, Amsterdam.
Pounds, K. A. (1970),X-Radiation below 25 Å Ann. Géophys.26, 555–565.
Ratnasiri, P. A. J., andSechrist, C. F., Jr. (1975),An Investigation of the Solar Zenith Angle Variation of D-Region Ionization, Aeronomy Rep. No. 67, Univ. of Illinois, Urbana.
Smith, L. G., andMiller, K. L. (1974),The Measurement of O 2 Number Density by Absorption of Lyman-α J. geophys. Res.79, 1965–1971.
Swider, W. (1969),Ionization Rates due to the Attenuation of 1–100 Å Nonflare Solar X-Rays in the Terrestrial Atmosphere, Rev. Geophys.7, 573–594.
Swider, W. (1978),Daytime Nitric Oxide at the Base of the Thermosphere, J. Geophys. Res.A 83, 4407–4410.
Tisone, C. C. (1973),Measurements of NO Densities during Sunrise at Kauai, J. geophys. Res.78, 746–750.
Tohmatsu, T., andIwagami, N. (1976),Measurement of Nitric Oxide Abundance in Equatorial Upper Atmosphere, J. Geomagn. Geoelect., Kyoto28, 343–353.
Velinov, P. (1968),On Ionization in the Ionospheric D-Region by Galactic and Solar Cosmic Rays, J. atmos. terr. Phys.30, 1891–1905.
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Laštovička, J. Nitric oxide concentration near the mesopause as deduced from ionospheric absorption measurements. PAGEOPH 120, 607–614 (1982). https://doi.org/10.1007/BF00876646
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DOI: https://doi.org/10.1007/BF00876646