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Concept of an Opto-electronic Accelerometer System (OAS) (1987)

Keller, K. ; Kunkel, B. ; Lutz, R.

In: Other Sources

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Publication Date: 2013-08-29

Description: An accelerometer based on a spring-suspended reference mass and its precise relative motion measurement by means of 3 two-dimensional position sensitive detectors (PSD) is described. A breadboard model achieves a resolution (longterm linearity) of 25 nm in one direction. Due to the physical principle of the PSD, the second layer is slightly less sensitive than the top layer; accordingly for gravity gradient detection the more sensitive layer is selected for the Z/X component detection. At 10 Hz sampling rate an acceleration gradient of under 10 to the minus 12th power g (i.e., 0.01 E or 0.001 Gal/km) is considered to be detectable.

Keywords: SPACECRAFT INSTRUMENTATION

Type: ESA, Proceedings of an ESA-NASA Workshop on a Joint Solid Earth Program; p 49-54

Format: text

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