Conclusions obtained from an absorption measurement campaign in Spain

Details Conclusions obtained from an absorption measurement campaign in Spain Conclusions obtained from an absorption measurement campaign in Spain

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993adspr..13...89w&link_type=abstract

Advances in Space Research (ISSN 0273-1177), vol. 13, no. 3, p. 89-96.

Computer Science

Sound

Atmospheric Attenuation, D Region, Ionospheric Propagation, Ionospheric Sounding, Rocket Sounding, Atmospheric Circulation, Spain, Stratosphere

Scientific paper

A long-term series of absorption measurements in an A3 network was made in order to detect the southern limit of the winter anomaly. In Spain, this phenomenon occurred every year. The quasi-irregularity of beginning and end suggests a cause of quasi-meteorological character. An apparent four-day-period might be explained by a parametric oscillation of the D-region, possibly triggered by the bi-annual oscillation of the stratosphere. In winter, atmospheric pressure changes at the ground appear to be correlated with absorption changes. The shape of the diurnal variation changes with the season and in groups of days; this may be connected with circulation changes in the D-region.

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