Aerosol Discrimination by Electronic High- and Low-Pass Filtering
Abstract
Two electronic techniques are investigated for discriminating between aerosol and rigid-target (such as aircraft and terrain) return signals in pulsed active optical sensors (proximity fuzes). Short transmitter pulses approximately 5 to 10 ns full width at half maximum are considered in systems with pencil-beam influence patterns. Relative pulse stretching of aerosol returns is exploited for discrimination by using either a differentiating circuit or a low-pass filter to bring out pulse-speed or pulse-width differences. The investigations involve modeling and analysis, as well as testing the discrimination schemes with measured aerosol-return signals from cumulus clouds. Both techniques are found to be potentially effective for designing proximity fuzes that reject aerosol signals. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1980
- Accession Number
- ADA094843
Entities
People
- Dennis W. Mcguire
- Michael Conner
- Theodore H. Hopp
Organizations
- Harry Diamond Laboratories