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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 15, issue 4
Ann. Geophys., 15, 430–442, 1997
https://doi.org/10.1007/s00585-997-0430-6
© European Geosciences Union 1997
Ann. Geophys., 15, 430–442, 1997
https://doi.org/10.1007/s00585-997-0430-6
© European Geosciences Union 1997

  30 Apr 1997

30 Apr 1997

Observations of atmospheric gravity waves by radio interferometry: are results biased by the observational technique?

C. Mercier1 and A. R. Jacobson2 C. Mercier and A. R. Jacobson
  • 1Observatoire de Paris-Meudon, URA 2080, France (e-mail: mercier@obspm.fr)
  • 2Los Alamos National Laboratory, New Mexico 87545, USA (e-mail: ajacobson@lanl.gov)

Abstract. In this paper we present a quantitative comparison between a large data base of medium-scale atmospheric gravity waves (AGWs) observed by radio interferometry of transionospheric radio sources and the results of a numerical simulation of the observed effects. The simulation includes: (i) the propagation and dissipation of AGWs up to ionospheric heights and (ii) the calculation of the subsequent slant TEC perturbations integrated along the path to the radio sources. We show that the observed azimuthal distribution of AGWs can be deeply biased. Predicted results are found to be consistent with previous extensive observations using radio beacons aboard geostationary satellites. These observations are rediscussed in view of the present predictions.

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