Meteorological balloons Troposphere 8 Balloons 6 Gravity waves 6 Spectrum analysis 6 Stratospheric balloon 6 Wind 6 balloon measurement 6 Argentina, Andes 4 Atmospheric movements 4 Atmospheric spectra 4 Atmospheric temperature 4 Balloon sounding 4 Geophysics 4 Meteorology 4 Sounding apparatus 4 South America 4 Stratospheric balloons 4 balloon observation 4 orography 4 spectral analysis 4 stratosphere 4 Acoustic waves 2 Andes mountains 2 Anemometers 2 Argentina, Mendoza 2 Artifacts 2 Atmospheric Transport 2 Atmospheric conditions 2 Atmospheric measurements 2