Curriculum Vitae:

Name:                          Leonid Petrov 

Academic Title:                PhD, 1995

Date of birth:                 October 23, 1965

Place of birth:                Leningrad,  Soviet Union.

Citizenship:                   USA

Education:                     Graduated from the astronomical department of 
                               the faculty of mathematics and mechanics
                               Leningrad State University in 1988.

Ph.D. degree and dissertation: Institute of Applied Astronomy, Russian Academy
                               of Science, St.Petersburg, Russia, 1995.
                               Dissertation: "The methods of determination of 
                               geodynamical parameters using VLBI".

Present position:              Staff scientist of 
                               ADNET Systems, Inc./
                               NASA Goddard Space Flight Center, 
                               Greenbelt, Maryland, USA.

Main scientific interests:     radioastronomy, astrometry, geophysics, 
                               data analysis.

Language ability:              Russian -- native language;
                               English -- fluent;
			       German  -- able to speak and to read;

      Employment History: 

Sep. 1983 - Jul. 1988  Student of the astronomical department of the  faculty 
                       of mathematics and mechanics of  Leningrad State 

Oct. 1988 - Oct. 1996  Assistant, junior scientific researcher, scientific
                       researcher, Institute of Applied Astronomy of Russian 
                       Academy of Science, St.Petersburg, Russia.

Nov. 1996 - Jun. 1997  Visiting researcher, Goddard Space Flight Center, NASA, 
                       Greenbelt, Maryland, USA.

Jun. 1997 - Apr. 2000  Scientific researcher (Wissenschaftlicher Mitartbeiter),
                       Geodetic Institute of the University of Bonn, Germany.

Sep. 2005 - Mar. 2006  Visiting professor of the 
                       National Astronomical Observatory of Japan in Mizusawa.

Apr. 2000 - Jul. 2008  Staff scientist, NVI, Inc./NASA Goddard Space Flight Center<, 
                       Greenbelt, Maryland, USA.

Nov. 2008 - Aug. 2018  Senior Scientiic software developer/analyst
                       ADNET Systems, Inc./NASA Goddard Space Flight Center, 
                       Greenbelt, Maryland, USA.

Sep. 2018 - present    VLBI Lead Scientist at NASA Goddard Space Flight Center,
                       Greenbelt, Maryland, USA.

        Brief description of scientific activity:

  After graduation from the university in 1988 I was engaged in the project of 
development of the national astro-space coordinate and time service of the
Soviet Union. I was performing research in the area of measuring positions
of the fundamental geodetic stations by methods of radioastronomy with the 
highest precision. I have mastered technology of very long baseline 
radiointerferometry (VLBI) technology from designing experiments to 
interpretation of results and have developed from scratches software for 
analysis of geodetic VLBI observations for applications in astrometry 
and geodynamics.

  During my work under that project and further during my stay in Geodetic 
Institute of Bonn and in NASA Goddard Space Flight Center I have developed 
an expertise in advanced methods of data analysis as well as in adjacent 
fields: astrophysics, fundamental physics, geodesy, oceanography, atmospheric 
science. I have a wide experience in programming: development of system of 
very large size, development of compilers, programming at low level, real-time
applications. I wrote over 1,000,000 lines of code for various scientific

  Currently, my sphere of responsibilities covers a wide range of problems 
related to 1) design, implementation and maintenance of the procedure for 
a routine data analysis of VLBI measurements and timely delivery of the 
products. One of the products is the series of the Earth Orientation Parameters 
which are delivered to the  International Earth 
Rotation Service for distribution among various customers.
2) Improvements of the methods of data analysis of radiointerferometric 
observations, investigation of systematic errors and development of methods 
for alleviation of their influence on results. 3) Scientific interpretation 
of the results. I am also providing consulting, maintenance and upgrade of 
the analysis software package Calc/Solve for the international geodetic 

  I made a determination of Love numbers from radio interferometric data,
investigated the long-term stability of geodetic VLBI measurements, determined
empirical model of nutation and precession, derived accurate estimates 
of the tectonic motion of the VLBI stations, made the most complete catalogues 
of positions of compact radiosources, developed the procedure for computation
of various mass loading and their quantitative validation using space geodesy
observations. Results are published in over 40 journal referred papers.

Main scientific results:

1) I have discovered that opctial jets of milliarcsecond scales 
   are ubiquitous and are the main reason of Gaia positions offsets
   with respect to VLBI.
2) I have directly detected for the first time crust deformations caused 
   by polar tide.
3) I have succeeded for the first time in detecting horizontal site 
   displacements caused by atmospheric pressure loading.
4) I have discovered over 14000 compact radio sources with structure at
   milliarcsecond level and determined their precise positions.

     List of the most important publications: 

 1. L. Petrov, "The empirical Earth rotation model from VLBI observations",
       Astronomy and Astrophysics, vol. 467, p. 359, 2007

 2. L. Petrov, J.-P. Boy, "Study of the atmospheric pressure loading signal 
       in VLBI observations", J. Geophys. Res.,
       10.1029/2003JB002500, vol. 109, No. B03405, 2004.

 3. L. Petrov, C. Ma, "Study of harmonic site position variations determined
       by VLBI", J. Geophys. Res., vol. 108, No. B4, 2190,
       doi: 10.1029/2002JB001801, 2003.

 4. Petrov, L., Kovalev, Y.Y., Plavin, A. V., "A quantitative analysis of 
       systematic differences in positions and proper motions 
       of Gaia DR2 with respect to VLBI", 2019, MNRAS, 482(3), 3023-3031.

2019.02.17   Leonid Petrov

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