DocumentCode
2978081
Title
New method of digital fringe signal processing in an absolute gravimeter
Author
Tsubokawa, T. ; Svitlov, S.
Author_Institution
Div. of Earth Rotation, Nat. Astron. Obs., Iwate, Japan
fYear
1998
fDate
6-10 July 1998
Firstpage
632
Lastpage
633
Abstract
We describe a digital fringe signal processing method realized in the new Tsubokawa-type transportable absolute gravimeter. A data processing algorithm based on the second-differences method has used neither the fringes counting nor the nonlinear least squares fitting. The relative combined standard uncertainty is less than 1/spl middot/10/sup -9/ of an absolute gravity value.
Keywords
Michelson interferometers; finite difference methods; geophysical signal processing; gravimeters; measurement standards; measurement uncertainty; Michelson interferometer; Tsubokawa-type transportable gravimeter; absolute gravimeter; absolute gravity; data processing algorithm; digital fringe signal processing method; free-fall multiple-stations method; fringe phase detection; relative combined standard uncertainty; second-differences method; zero crossings; Data processing; Digital signal processing; Earth; Gravity measurement; Least squares methods; Metrology; Signal processing; Signal processing algorithms; Testing; Uncertainty;
fLanguage
English
Publisher
ieee
Conference_Titel
Precision Electromagnetic Measurements Digest, 1998 Conference on
Conference_Location
Washington, DC, USA
Print_ISBN
0-7803-5018-9
Type
conf
DOI
10.1109/CPEM.1998.700125
Filename
700125
Link To Document