Interpretation of gravity wave signatures in GPS radio occultations

摘要: [1] The horizontal averaging of global positioning system radio occultation retrievals produces an amplitude attenuation and phase shift in any plane gravity wave, which may lead to significant discrepancies with respect the original values. In addition, wavelengths cannot be straightforwardly inferred due observational characteristics. If waves produce small departures from spherical symmetry background atmosphere under assumption that refractivity kernel represented by a delta function, analytical expression derived order find how retrieved amplitudes become weakened (against ones). particular, we study range detected consequent reduction variance calculation, is found around 19%. A larger discrepancy was obtained when comparing one computed numerical simulation case. Wave can better resolved fronts are nearly or angle between line sight component wave vector approaches π/2. Short scale have high probability becoming attenuated not being at all. We then geometrical relations terms relative orientation sounding, so as appropriately interpret extracted acquired data. Only inertio-gravity waves, exhibit fronts, will show differences vertical wavelengths. Last, analyze retrieval effect on generally nonzero π/4 for largest