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Comment on 'Evaluation of the local value of the Earth gravity field in the context of the new definition of the kilogram'

MPG-Autoren
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Svitlov,  S. M.
Max Planck Fellow Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Zitation

Svitlov, S. M. (2010). Comment on 'Evaluation of the local value of the Earth gravity field in the context of the new definition of the kilogram'. METROLOGIA, 47(3), 337-340. doi:10.1088/0026-1394/47/3/N01.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-002D-6AFB-1
Zusammenfassung
A recent paper (Baumann et al 2009 Metrologia 46 178-86) presents a method to evaluate the free-fall acceleration at a desired point in space, as required for the watt balance experiment. The claimed uncertainty of their absolute gravity measurements is supported by two bilateral comparisons using two absolute gravimeters of the same type. This comment discusses the case where absolute gravity measurements are traceable to a key comparison reference value. Such an approach produces a more complete uncertainty budget and reduces the risk of the results of different watt balance experiments not being compatible.