Attenuation and scintillation of radio waves in the Earth's atmosphere from radio occultation experiments on satellite-to-satellite links

Radio Science ◽  
1995 ◽  
Vol 30 (3) ◽  
pp. 591-602 ◽  
Author(s):  
O. I. Yakovlev ◽  
S. S. Matyugov ◽  
I. A. Vilkov
Keyword(s):  
Radio Occultation ◽  
Radio Waves ◽  
Earth’S Atmosphere ◽  
Satellite Links ◽  
Earth's Atmosphere

Initial Results of Radio Occultation Observations of Earth's Atmosphere Using the Global Positioning System

Science ◽  
1996 ◽  
Vol 271 (5252) ◽  
pp. 1107-1110 ◽  
Author(s):  
E. R. Kursinski ◽  
G. A. Hajj ◽  
W. I. Bertiger ◽  
S. S. Leroy ◽  
T. K. Meehan ◽  
...  
Keyword(s):  
Global Positioning System ◽  
Radio Occultation ◽  
Positioning System ◽  
Earth’S Atmosphere ◽  
Global Positioning ◽  
Earth's Atmosphere ◽  
Initial Results

scholarly journals Exploring earth's atmosphere with radio occultation: contributions to weather, climate and space weather

2011 ◽  
Vol 4 (1) ◽  
pp. 135-212 ◽  
Author(s):  
R. A. Anthes
Keyword(s):  
Water Vapor ◽  
Electron Density ◽  
Space Weather ◽  
Radio Occultation ◽  
Proof Of Concept ◽  
Atmospheric Research ◽  
Earth’S Atmosphere ◽  
Satellite Constellation ◽  
Earth's Atmosphere ◽  
Satellite Missions

Abstract. The launch of the proof-of-concept mission GPS/MET in 1995 began a revolution in profiling earth's atmosphere through radio occultation (RO). GPS/MET; subsequent single-satellite missions CHAMP, SAC-C, GRACE, METOP-A, and TerraSAR-X; and the six-satellite constellation, FORMOSAT-3/COSMIC, have proven the theoretical capabilities of RO to provide accurate and precise profiles of electron density in the ionosphere and refractivity, containing information on temperature and water vapor, in the stratosphere and troposphere. This paper summarizes results from these RO missions and the applications of RO observations to atmospheric research and operational weather analysis and prediction.

scholarly journals Reconstruction of internal gravity wave parameters from radio occultation retrievals of vertical temperature profiles in the Earth's atmosphere

2011 ◽  
Vol 4 (10) ◽  
pp. 2153-2162 ◽  
Author(s):  
V. N. Gubenko ◽  
A. G. Pavelyev ◽  
R. R. Salimzyanov ◽  
A. A. Pavelyev
Keyword(s):  
Gravity Wave ◽  
Wind Velocity ◽  
Radio Occultation ◽  
Internal Gravity Wave ◽  
Shear Instability ◽  
Temperature Profiles ◽  
Vertical Temperature ◽  
Earth’S Atmosphere ◽  
Wave Parameters ◽  
Earth's Atmosphere

Abstract. A new method for the reconstruction of internal gravity wave (IGW) parameters from a single vertical temperature profile measurement in the Earth's atmosphere has been developed. This method does not require any additional information not contained in the profile and may be used for the analysis of profiles measured by various techniques. The criterion for the IGW identification has been formulated and argued. In the case when this criterion is satisfied, then analyzed temperature fluctuations can be considered as wave-induced. The method is based on the analysis of relative amplitude thresholds of the temperature wave field and on the linear IGW saturation theory in which amplitude thresholds are restricted by dynamical (shear) instability processes in the atmosphere. When the amplitude of an internal gravity wave reaches the shear instability limit, energy is assumed to be dissipated in such a way that the amplitude is maintained at the instability limit as the wave propagates upwards. In order to approbate the method we have used data of simultaneous high-resolution balloon measurements of the temperature and wind velocity in the Earth's stratosphere over France where a long-period inertia-gravity wave has been detected. Using the radiosonde temperature data only, we have reconstructed all wave parameters, which were determined by radiosondes, with relative deviations not larger than 30%. An application of the method to the radio occultation (RO) data has given the possibility to identify the IGWs in the Earth's stratosphere and to determine the magnitudes of key wave parameters such as the intrinsic frequency, amplitudes of vertical and horizontal perturbations of the wind velocity, vertical and horizontal wavelengths, intrinsic vertical and horizontal phase (and group) speeds, kinetic and potential energy, vertical fluxes of the wave energy and horizontal momentum. The obtained results of internal wave studies in the Earth's stratosphere deduced from the COSMIC and CHAMP GPS occultation temperature profiles are presented and discussed.

scholarly journals Fluctuations of radio occultation signals in sounding the Earth's atmosphere

2018 ◽  
Vol 11 (2) ◽  
pp. 663-680 ◽  
Author(s):  
Valery Kan ◽  
Michael E. Gorbunov ◽  
Viktoria F. Sofieva
Keyword(s):  
Gravity Waves ◽  
Radio Occultation ◽  
Radio Signal ◽  
Internal Gravity Waves ◽  
Statistical Characteristics ◽  
Phase Fluctuations ◽  
Upper Troposphere ◽  
Earth’S Atmosphere ◽  
Kolmogorov Turbulence ◽  
Earth's Atmosphere

Abstract. We discuss the relationships that link the observed fluctuation spectra of the amplitude and phase of signals used for the radio occultation sounding of the Earth's atmosphere, with the spectra of atmospheric inhomogeneities. Our analysis employs the approximation of the phase screen and of weak fluctuations. We make our estimates for the following characteristic inhomogeneity types: (1) the isotropic Kolmogorov turbulence and (2) the anisotropic saturated internal gravity waves. We obtain the expressions for the variances of the amplitude and phase fluctuations of radio occultation signals as well as their estimates for the typical parameters of inhomogeneity models. From the GPS/MET observations, we evaluate the spectra of the amplitude and phase fluctuations in the altitude interval from 4 to 25 km in the middle and polar latitudes. As indicated by theoretical and experimental estimates, the main contribution into the radio signal fluctuations comes from the internal gravity waves. The influence of the Kolmogorov turbulence is negligible. We derive simple relationships that link the parameters of internal gravity waves and the statistical characteristics of the radio signal fluctuations. These results may serve as the basis for the global monitoring of the wave activity in the stratosphere and upper troposphere.

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