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A picosecond accuracy relativistic VLBI model via Fermi normal coordinates
Author(s) -
ShahidSaless Bahman,
Hellings Ronald W.,
Ashby Neil
Publication year - 1991
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/91gl01187
Subject(s) - physics , barycentric coordinate system , very long baseline interferometry , formalism (music) , fermi gamma ray space telescope , inertial frame of reference , curvilinear coordinates , geodesy , classical mechanics , computational physics , astrophysics , geometry , geology , quantum mechanics , mathematics , art , musical , visual arts
We use Fermi normal coordinates to construct transformations relating solar system barycentric coordinates to local inertial geocentric coordinates. We then calculate relativistic corrections to terrestrial VLBI measurements. We develop our formalism to include corrections needed for picosecond accuracy. We also include a calculation of photon time delay which includes effects arising from the motion of gravitational sources.