Synergy Global Navigation Satellite System and Very Long Baseline Interferometry space

Organization

National Aeronautics and Space Administration (NASA)

0321-NPP-MAR
26-GSFC-Earth Sci

All applications must be submitted in Zintellect. Please visit the NASA Postdoctoral Program website for application instructions and requirements: NASA Postdoctoral Program (orau.org). A complete application to the NASA Postdoctoral Program includes:

• Research proposal
• Three letters of recommendation
• Official doctoral transcript documents

The NASA Postdoctoral Program (NPP) offers unique research opportunities to highly‑talented scientists to engage in ongoing NASA research projects at a NASA Center, NASA Headquarters, or at a NASA‑affiliated research institute. These one‑to‑three year fellowships are competitive and are designed to advance NASA’s missions in space science, Earth science, aeronautics, space operations, exploration systems, and astrobiology.

This opportunity is closed to applicants who are Senior Fellows (5‑years or more past PhD).

Historically, data analysis of two space geodesy techniques, very long baseline interferometry (VLBI) and Global Navigation Satellite Systems (GNSS), developed independently. Recent advances in space geodesy instrumentation and data analysis have blurred the line between these two techniques. It has been demonstrated that it is feasible to (1) observe GNSS satellites with VLBI, (2) use a GNSS receiver as an element of a VLBI array and (3) determine pseudo‑ranges from voltage data of GNSS satellites recorded with a radio telescope.

These capabilities have the potential to develop VLBI+GNSS techniques that mitigate weaknesses of individual techniques. The VLBI+GNSS technique involves observations and data analysis of any of these three observing modes.

The focus of the proposed research is to develop methods of data analysis of an emerging VLBI+GNSS technique, identify the strengths and weaknesses of the new technique, optimize observing programs, process data, and present evidence that substantiates claims about strengths and weaknesses.

This is a new research area that falls into a high‑risk, high‑reward category.

NASA heavily contributes to the ongoing international geodetic VLBI observing program for determination of terrestrial coordinate system, celestial coordinate system, and determination of the Earth orientation parameters with the highest accuracy. The agency is interested in mitigating systematic errors in results of these observations and in investigating biases between VLBI and GNSS results. Efforts in that direction will contribute to the success of NASA missions.

Earth Science

Leonid Petrov
Leonid.

Petrov

Applications with citizens from Designated Countries will not be accepted at this time, unless they are Legal Permanent Residents of the United States. A complete list of Designated Countries can be found at: https://(Use the "Apply for this Job" box below)..

Eligibility is currently open to:

• U.S. Citizens;
• U.S. Lawful Permanent Residents (LPR);
• Foreign Nationals eligible for an Exchange Visitor J-1 visa status; and,
• Applicants for LPR, asylees, or refugees in the U.S. at the time of application with
  1) a valid EAD card and
  2) I-485 or I-589 forms in pending status

Please email npp

Applicants with hand‑on experience in developing software for processing GNSS or VLBI data will receive favorable consideration. The proposed research involves heavy computation under Linux environment. The successful applicant knows Fortran or C and is willing to master his or her skill in modern Fortran programming language.

Mikeala

• Degree:
  Doctoral Degree.