Picometer knowledge transfer: overview and status
The Picometer Knowledge Transfer testbed is one of several technology testbeds that will help to prove technology readiness for the Space Interferometry Mission (SIM).
picometer interferometer SIM↗
Engineering topics
Schaechter, D.
Publications and source records attributed to Schaechter, D..
Space Interferometry Mission: Starlight and Metrology Subsystems
The Space Interferometry Mission, planned for launch in 2009, will measure the positions of celestial objects to an unprecedented accuracy of 4.0 microarcseconds.
interferometry↗
Experimental demonstration of static shape control
Previously cited in issue 03, p. 344, Accession no. A82-13998
Eldred, D.↗
Experimental demonstration of static shape control
Results of a microprocessor-controlled implementation of static shape control using a specially constructed flexible beam facility are presented. The discussion covers the development of shape control algorithms, adaptation of the algorithms for use with finite element models, construction of a flexible beam, characterization and calibration of the facility, development of a finite element model for the beam, and the development of computer hardware and software. It is shown that feedback control yields better results than open-loop control, and that the use of more than two sensors in the control loop has little effect on the system performance.
Eldred, D.↗
Study to develop gradiometer techniques
The primary goal of the current gravity gradiometer research at Stanford has been to establish the feasibility of using a gravity gradiometer with 1 E accuracy, as the primary sensor in various applications. The two applications considered here in detail are geodesy missions and inertial navigation systems. Preliminary sections on gravity models and gravity gradiometer bias estimation are also included.
Schaechter, D.↗