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Time-Domain Smoothing Processing for Equivalence-Principle Test Using Free-Fall Method |
| ZHOU Ze-Bing;WANG Shi-Fang;LUO Jun |
| Department of Physics, Huazhong University of Science and Technology, Wuhan 430074 |
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| Cite this article: |
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ZHOU Ze-Bing, WANG Shi-Fang, LUO Jun 2005 Chin. Phys. Lett. 22 1614-1617 |
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Abstract We investigate the effect of the time-domain smoothing processing for the equivalence-principle test using the free falling method, compared to the low-pass-filter method. Theoretical calculation shows that the time-domain smoothing processing can suppress the high-frequency noises and does not cause pseudo-acceleration. The physical reason is that the time-domain smooth-processing method is an unweighted filtering and is unrelated to the polynomial fitting. The uncertain acceleration difference due to high-frequency mechanical vibrations in the equivalence-principle test for extended rotating bodies can be suppressed from 2μGal to 0.05μGal after the time-domain smoothing processing.
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| Keywords:
04.80.Cc
07.05.Kf
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Published: 01 July 2005
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| PACS: |
04.80.Cc
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(Experimental tests of gravitational theories)
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07.05.Kf
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(Data analysis: algorithms and implementation; data management)
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