Instrument System for Monitoring Simulated Weather Generated Particulates

The objective of this project is to develop a monitor which can evaluate the velocity, size, concentration, and spatial distribution of Weather Generated Particulates (WGP), including sand, ice, etc., under ground-based simulation conditions. Specific instrumentation requirements include the measurement of spherical or non-spherical, opaque or transparent particulates in the size range of 100 - 1000 micrometers. The concentration can vary from the PPM level (by volume) up to concentrations which simulate low visibility sandstorms. Velocities can range from zero to hypersonic Mach numbers at flight environments ranging from sea level up to 200,000 foot altitude, which implies low pressures and freezing tempatures. Insitec proposes to use a combination of three real-time optical measurement methods to provide the required information. These light scattering techniques will be implemented in a prototype design which uses software and hardware concepts that have been previously developed and verified by Insitec. For Phase I, two Insitec instruments (PCSV and EPCS) will be available for preliminary testing under anticipated WPG conditions to show feasibility and to guide specific prototype development in Phase II.