![]() ![]() While both instruments’ sizing accuracy is affected by the aerosol chemical composition and morphology, the influence is more profound on the POPS.ġ.1. The size distributions measured by both of them remained unaffected up to 15,000 cm −3. The comparison between POPS and an Ultra-High Sensitivity Aerosol Spectrometer (UHSAS) suggests that the coincidence error is less than 25% when the number concentration is less than 4000 cm −3. POPS maintains its performance under different environmental conditions as long as the laser temperature remains above 25 ☌ and the aerosol flow temperature inside the optical chamber is 15 ☌ higher than the ambient temperature. This study evaluates the performance of a POPS with an upgraded laser heater and additional temperature sensors in the aerosol pathway. Ultra balloon portable portable#A Portable Optical Particle Spectrometer (POPS) is an emerged instrument to measure ambient aerosol size distribution with high time and size resolution, designed for deployment on a small unmanned aerial system (UAS) or tethered balloon system (TBS) platforms. However, small airborne platforms require miniaturized instrumentation due to apparent size, power, and weight limitations. ![]() Modern pilotless aerial systems provide a new platform for atmospheric in situ measurement. ![]() Accurate representation of atmospheric aerosol properties is a long-standing problem in atmospheric research. ![]()
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