Test & Measurement

Fast, High-Precision Readout Circuit for Detector Arrays

The GEO-CAPE mission described in NASA’s Earth Science and Applications Decadal Survey requires high spatial, temporal, and spectral resolution measurements to monitor and characterize the rapidly changing chemistry of the troposphere over North and South Americas. High-frame-rate focal plane arrays (FPAs) with many pixels are needed to enable such measurements.

Posted in: Physical Sciences, Test & Measurement, Briefs

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A System for Measuring the Sway of the Vehicle Assembly Building

Tests have shown that the existing facility is safe. A system was developed to measure the sway of the Vehicle Assembly Building (VAB) at Kennedy Space Center. This system was installed in the VAB and gathered more than one total year of data. The building movement was correlated with measurements provided by three wind towers in order to determine the maximum deflection of the building during high-wind events.

Posted in: Physical Sciences, Test & Measurement, Briefs

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ISS Ammonia Leak Detection Through X-Ray Fluorescence

An astrophysics instrument can be used to detect and localize ISS ammonia leaks. Ammonia leaks are a significant concern for the International Space Station (ISS). The ISS has external transport lines that direct liquid ammonia to radiator panels where the ammonia is cooled and then brought back to thermal control units. These transport lines and radiator panels are subject to stress from micrometeorites and temperature variations, and have developed small leaks. The ISS can accommodate these leaks at their present rate, but if the rate increased by a factor of ten, it could potentially deplete the ammonia supply and impact the proper functioning of the ISS thermal control system, causing a serious safety risk.

Posted in: Physical Sciences, Test & Measurement, Briefs

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Hydrometeor Size Distribution Measurements by Imaging the Attenuation of a Laser Spot

Measurement of the DSD’s second moment is made by way of the Beer-Lambert law. The optical extinction of a laser due to scattering of particles is a well-known phenomenon. In a laboratory environment, this physical principle is known as the Beer-Lambert law, and is often used to measure the concentration of scattering particles in a fluid or gas. This method has been experimentally shown to be a usable means to measure the dust density from a rocket plume interaction with the lunar surface. Using the same principles and experimental arrangement, this technique can be applied to hydrometeor size distributions, and for launch-pad operations, specifically as a passive hail detection and measurement system.

Posted in: Physical Sciences, Test & Measurement, Briefs

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Victim Simulator for Victim Detection Radar

This simulator can be placed for long periods of time in environments that would be unsafe for a human subject. Testing of victim detection radars has traditionally used human subjects who volunteer to be buried in, or climb into a space within, a rubble pile. This is not only uncomfortable, but can be hazardous or impractical when typical disaster scenarios are considered, including fire, mud, or liquid waste. Human subjects are also inconsistent from day to day (i.e., they do not have the same radar properties), so quantitative performance testing is difficult. Finally, testing a multiple-victim scenario is difficult and expensive because of the need for multiple human subjects who must all be coordinated.

Posted in: Physical Sciences, Test & Measurement, Briefs

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Instrument Class® Industrial Electronics -- Data Acquisition & Control, Signal Conditioning, Data Communications

With 30 years of experience, Dataforth is the marketplace leader in the design and manufacture of rugged, high performance industrial electronics. Our new Corporate Capabilities Brochure presents an overview of our 1200+ data acquisition and control, signal conditioning, and data communication products… all designed to provide unparalleled isolation, accuracy, and reliability. Look inside…our commitment is to YOUR success!

Posted in: Test & Measurement, White Papers

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Best Practices for Making the Most Accurate Radar Pulse Measurements

Fast and accurate radar pulse measurements are critical when designing or manufacturing radar components. Knowing how to optimize power measurement tools will help engineers meet stringent market demands. Get tips on how to make the fastest and most accurate radar pulse measurements by reading this application note. This article also includes real-world scenarios that demonstrate how to put these tips into practice with Agilent power meters and sensors. Also available for download when you register: Secondary Radar Transponder Testing Using the 8990B Peak Power Analyzer How to Measure 5 ns Rise/Fall Time on an RF Pulsed Power Amplifier Using the 8990B Peak Power Analyzer Scalar Network Analysis Tool application software, and application note: Scalar Network Analysis with U2000 Series USB Power Sensors Download now!

Posted in: Test & Measurement, White Papers

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