The accuracy of space geodesy is limited by mis-modeling path delay in the neutral atmosphere. The focus of the research is to improve path delay models for analysis of Space Geodesy data including  data from Very Long Baseline Interferometry (VLBI),  Global Navigation Satellite Systems (GNSS), and Doppler Orbitography Radiopositioning Integrated by Satellite (DORIS) by, (1) investigating  the use of global numerical weather models, regional weather models, results of InSAR data analysis, water vapor radiometers for determination of errors in path delay modeling; (2) understanding the origin of these errors; and (3) working to develop methodologies for mitigation of these wet-delay errors.  In addition to deterministic modeling the path delay in the neutral atmosphere, this research also explores the applicability of the use of big datasets for evaluation of stochastic properties of the atmosphere for given geodetic stations over a defined time interval by utilizing advances of turbulence theory.

Location:
Goddard Space Flight Center
Greenbelt, Maryland

Field of Science:Earth Science

Advisors:
Leonid Petrov
leonid.petrov@nasa.gov

Terence Sabaka
Terence.J.Sabaka@nasa.gov
301-614-6493

Frank Lemoine
frank.g.lemoine@nasa.gov
301-614-6109

• Citizenship: LPR or U.S. Citizen
• Degree: Doctoral Degree.