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Engineering Metrology Services

Current Project Views - updated 8/29/2000

Automated Video System
EMS has developed a system for the automated coordinate measurement of multiple targets.  Traditional theodolite use requires the operator to view a target through an optical eyepiece, in which case the eye is the sensing device.  EMS has developed a video eyepiece which optionally replaces the human eye with a CCD video camera where the image is processed in the MeasTools99Ó software.  The figures below show three views of the system.  Figure A is a video image of a 1.5 inch diameter SMR (Spherically Mounted Retroreflector target) being viewed by the theodolite video system.  Figures B and C show front and rear views of the enhanced theodolite.  A cool fiber optic light source is used to provide good illumination of retroreflective targets, allowing operation at distances up to 100 meters.

Click on the thumbnails below to view the full-size images.

Figure A 
Video Theodolite System

Figure B 
Video Theodolite Front View

Figure C 
Video Theodolite Rear View

 

70-meter Diameter Deep Space Antenna

This 70-meter diameter DSS-14 and 43 tracking antennas in Goldstone, California and Canberra, Australia are used by the Jet Propulsion Laboratory to track deep space probes like those sent to Jupiter.  EMS is measuring the accuracy and gravity deformations of these shaped dishes as part of a big upgrade currently underway in California, Australia and Spain.

Click on the image to link to a full-size JPL picture or click here to see a 3D image of the dish.

X-band Phased Array Radar

EMS is currently designing personnel and theodolite mounting structures for measuring an 80-foot diameter rotating radar at 5 different elevation angles.  The structures are fully adjustable to keep the relative positions of the operator, theodolite and radar elements constant with elevation.  Construction of the radar is scheduled to start next year.

Click on the image to link to a full-size CAD view of the radar

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