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Design of a Prototype Primary Mirror Segment Positioning Actuator for the Thirty Meter Telescope
TMT actuator control system
2015/5/12
In order for the Thirty Meter Telescope (TMT) to achieve the required optical performance, each of its 738 primary
mirror segments must be positioned relative to adjacent segments with nanometer-lev...
A null frame for spacetime positioning by means of pulsating sources
spacetime positioning pulsating sources
2010/3/17
We introduce an operational approach to the use of pulsating sources, located at spatial infinity, for defining a relativistic positioning and navigation system, based on the use of four-dimensional b...