Concept of an Opto-electronic Accelerometer System (OAS)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.
Document ID
19880010468
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kunkel, B. (Messerschmitt-Boelkow-Blohm G.m.b.H. Ottobrunn, Germany)
Keller, K. (Messerschmitt-Boelkow-Blohm G.m.b.H. Ottobrunn, Germany)
Lutz, R. (Messerschmitt-Boelkow-Blohm G.m.b.H. Ottobrunn, Germany)
Date Acquired
September 5, 2013
Publication Date
October 1, 1987
Publication Information
Publication: ESA, Proceedings of an ESA-NASA Workshop on a Joint Solid Earth Program