Keyword: Emissions measurement

Briefs: Sensors/Data Acquisition
Recent advances could make it feasible to deploy networks of methane sensors to detect this greenhouse gas at large facilities.
Briefs: Test & Measurement

Many present and future NASA missions require high-performance, large-scale cryogenic systems, such as the sunshields and cold instruments for the James Webb Space Telescope (JWST). Testing these systems is...

Briefs: Aerospace
Development of a Turnkey Clear Air Turbulence Detection System

Currently, the only available means of reporting clear air turbulence (CAT) is the pilot report (PIREP), whereby a pilot experiencing turbulence reports their location and associated data. In this report, a system is proposed that would allow the detection of CAT through infrasonic...

Briefs: Physical Sciences
Using Laser-Induced Incandescence To Measure Soot in Exhaust

An instrumentation system exploits laser-induced incandescence (LII) to measure the concentration of soot particles in an exhaust stream from an engine, furnace, or industrial process that burns hydrocarbon fuel. In comparison with LII soot-concentration-measuring systems that have...

Briefs: Photonics/Optics

Experiments have demonstrated the feasibility of using flame-heated refractory dielectric solid bodies as wavelength-selective sources of light for special applications; in...

Briefs: Photonics/Optics

An optical technique for measuring the concentration of soot in air is based on the cavity-ring-down (CRD) principle, which is so named because it involves observation of the decay...