Analytic method for observation of the gravity waves using radio occultation data

Details Analytic method for observation of the gravity waves using radio occultation data Analytic method for observation of the gravity waves using radio occultation data

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30tasc1l&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 20, pp. ASC 1-1, CiteID 2021, DOI 10.1029/2003GL017818

Physics

2

Atmospheric Composition And Structure: Pressure, Density, And Temperature, Meteorology And Atmospheric Dynamics: Waves And Tides, Radio Science: Radio Wave Propagation, Radio Science: Remote Sensing, Radio Science: Atmospheric Propagation

Scientific paper

We present an analytical method for observation of the gravity waves (GWs) in the atmosphere from the amplitude of the radio occultation (RO) signal. We found the height dependence of the GW phase and amplitude (the GW ``portrait'') using for example the amplitude data corresponding to one of the GPS/Meteorology (GPS/MET) RO events. We estimated the horizontal wind speed perturbations, which are in fairly good agreement with radiosonde data. The horizontal wind speed perturbations v(h) are changing in the range v ~ +/- 1-+/-9 m/s with vertical gradients dv/dh ~ +/- 0.5-+/-15 m/(s km) in the height interval 10-40 km. The height dependence of the GW vertical wavelength has been inferred through the differentiation of the GW phase. Analysis of this dependence gives the estimation of the GW intrinsic phase speed, which varies for the considered event in the interval 1.5-5 m/s. Thus the analytical method has the capability to extract important information from the amplitude of the RO signals helpful for studying the GW activity in the atmosphere.

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