Remote sensing of tropospheric turbulence using GPS radio occultation
- Creators
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Shume, Esayas
- Ao, Chi
Abstract
Radio occultation (RO) measurements are sensitive to the small-scale irregularities in the atmosphere. In this study, we present a new technique to estimate tropospheric turbulence strength (namely, scintillation index) by analyzing RO amplitude fluctuations in impact parameter domain. GPS RO observations from the COSMIC (Constellation Observing System for Meteorology, Ionosphere, and Climate) satellites enabled us to calculate global maps of scintillation measures, revealing the seasonal, latitudinal, and longitudinal characteristics of the turbulent troposphere. Such information are both difficult and expensive to obtain especially over the oceans. To verify our approach, simulation experiments using the multiple phase screen (MPS) method were conducted. The results show that scintillation indices inferred from the MPS simulations are in good agreement with scintillation measures estimated from COSMIC observations.
Additional Information
© Author(s) 2016. This work is distributed under the Creative Commons Attribution 3.0 License. Received: 11 Mar 2016 – Discussion started: 20 Apr 2016 – Revised: 16 Jun 2016 – Accepted: 19 Jun 2016 – Published: 21 Jul 2016. The research described in this paper was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. The authors would like to acknowledge grant support from NASA ROSES GNSS Remote Sensing Team (NNH11ZDA001N-GNSS). We thank the UCAR COSMIC Data analysis and Archive Center for access to the COSMIC raw data. Author contributions. Esayas Shume and Chi Ao contributed to COSMIC RO data analysis, multiple phase screen simulation, and writing this paper. Edited by: S. Malinowsk.Attached Files
Published - amt-9-3175-2016.pdf
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Additional details
- Eprint ID
- 103550
- Resolver ID
- CaltechAUTHORS:20200529-093432651
- NASA/JPL/Caltech
- NNH11ZDA001N-GNSS
- NASA
- Created
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2020-06-01Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field