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New interferometric techniques for measuring horizontal earth crustal movements

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Abstract

An interferometer using modern interferometric techniques has been developed at ZIPE, which allows the measurement of distances of more than 1 km. The interferometric equipment was designed for comparing distances of different lengths and directions and is appropriate for testing horizontal earth crustal movements.

The new interferometer is based on Michelson’s interferometer using collimated light. The interference fringes are received by means of photoelectric detectors and can be observed visually by an oscilloscope. The duration of an interference signal need be only 1 ms and the corresponding path difference is registered by printing. In order to get such interferograms, the path difference of the two beams is periodically changed within an effective range of 8 mm, whilst the total difference between the beams can reach an amount of 1 m. The interferometer has been tested on the Potsdam International Standard Base Line up to a distance of 2.7 km.

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References

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Authors and Affiliations

  1. Academy of Science of the GDR, Central Earth Physics Institute (ZIPE), Potsdam, German Democratic Republic

    Rudi Schüler

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  1. Rudi Schüler
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Schüler, R. New interferometric techniques for measuring horizontal earth crustal movements. Bull. Geodesique 55, 196–202 (1981). https://doi.org/10.1007/BF02530860

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  • DOI: https://doi.org/10.1007/BF02530860

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