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  Laser interferometer for spaceborne mapping of the Earth's gravity field

Dehne, M., Guzman Cervantes, F., Sheard, B., Heinzel, G., & Danzmann, K. (2009). Laser interferometer for spaceborne mapping of the Earth's gravity field. Journal of Physics: Conference Series, 154: 012023. doi:10.1088/1742-6596/154/1/012023.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-465C-2 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-465E-D
Genre: Journal Article

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jpconf9_154_012023.pdf (Publisher version), 2MB
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 Creators:
Dehne, Marina1, Author              
Guzman Cervantes, Felipe1, Author              
Sheard, Benjamin1, Author              
Heinzel, Gerhard1, Author              
Danzmann, Karsten1, Author              
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1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              

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 Abstract: The Gravity Recovery and Climate Experiment (GRACE) is one of the present missions to map the Earth's gravity field. The aim of a GRACE follow-on mission is to map the gravitational field of the Earth with higher resolution over at least 6 years. This should lead to a deeper insight into geophysical processes of the Earth's system. One suggested detector for this purpose consists of two identical spacecraft carrying drag-free test masses in a low Earth orbit at an altitude of the order of 300 km, following each other with a distance on the order of 50 to 100 km. Changes in the Earth's gravity field will induce distance fluctuations between two test masses on separate spacecraft. These variations in the frequency range 1 to 100 mHz are to be monitored by a laser interferometer with nanometer precision. We present preliminary results of a heterodyne interferometer configuration using polarising optics, demonstrating the required phase sensitivity.

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 Dates: 2009
 Publication Status: Published in print
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 Identifiers: eDoc: 435375
ISI: 10732352
DOI: 10.1088/1742-6596/154/1/012023
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Title: Journal of Physics: Conference Series
Source Genre: Journal
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Pages: - Volume / Issue: 154 Sequence Number: 012023 Start / End Page: - Identifier: -