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ADC published in NASA Tech Briefs!
01/28/2014 - 11/30/-0001

ADC published in NASA Tech Briefs!

Positioning System Will Keep Test Range on Target

Wednesday, 01 January 2014

NASA has contracted ADC USA to design and build an Experimental Test Range (ETR) Positioning System that consists of positioning components for a state-of-the-art Radar Cross Section (RCS) and Antenna Measurement compact range chamber facility located at NASA’s Langley Research Center in Hampton, VA.

The Experimental Test Range is a system designed for performing antenna and electromagnetic scattering measurements. It utilizes a test chamber with the absorber type and placement selected for optimum performance, turnkey control instrumentation for fast and efficient data collection and processing, and a bridge crane for efficient model handling. Major components of the system include a rail positioning system that is used for transporting models from the prep area into the test area. Total travel for the range is 111 feet, with a positioning accuracy of ±0.05 inches within the ±10 feet surrounding the test position.

Four major rail positioning system components (RPSCs) are provided: RCS pylon with 4:1 ogival ratio with compatibility for azimuth rotator or pitch rotator tips; an antenna positioner consisting of a model tower and offset-slide assembly mounted to an Azimuth-over-Elevation positioner; a universal positioner for mounting different-sized foam columns attached to azimuth rotators; and a string reel positioning system with 1- inch positioning accuracy within a 40 x 40 x 25-foot space. The RPSCs have capability to be controlled remotely or from a control station within the model prep area.

Positioning system
Lansing, NY