Daytime lidar measurements of the mesospheric sodium layer

Details Daytime lidar measurements of the mesospheric sodium layer Daytime lidar measurements of the mesospheric sodium layer

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982p%26ss...30..169g&link_type=abstract

Planetary and Space Science, vol. 30, Feb. 1982, p. 169-177. Research supported by the Centre National de la Recherche Scientif

Computer Science

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24

Atmospheric Composition, Mesosphere, Optical Radar, Sodium, Annual Variations, Diurnal Variations, Photochemical Reactions

Scientific paper

Daytime lidar measurements of the mesospheric sodium layer have been performed at the Haute Provence Observatory from 1979 to 1981. High values of the signal to noise ratio (greater than 50) are obtained by simultaneously reducing the receiver bandwidth down to 20 pm and its field of view to 0.0003 radian. The long-term behavior of the sodium layer during daytime is similar to the one already observed for nighttime by previous lidar soundings. No regular variation of the characteristics parameters of the sodium layer-total content, altitude of the concentration maximum, topside and bottom side scale heights-during the diurnal cycle or during day-night transitions have been observed, suggesting that the photochemical processes are not dominant in governing the behavior of the upper atmospheric sodium atoms.

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