Transmittance Measurements at DIRT-II.
Abstract
This is a report on the NRL experiments at the DIRT-II tests sponsored by the Atmospheric Sciences Laboratory at the White Sands Missile Range in July 1979. The NRL experiment was designed to measure spectral transmittance through smoke and dust clouds generated by detonations of various explosive charges and also by impact of artillery rounds. Spectral transmission data as a function of time for 0.55 micrometers, 1.06 micrometers, and 10.37 micrometers were obtained for 63 events comprised of static detonations and artillery rounds. Transmission data for 1.06 micrometers, in most cases were similar and equal to 0.55 micrometers. In dry soil conditions the 10.37 micrometers channel showed higher transmittance values than the visible channel. There are indications that 10.37 micrometers transmittance in wet soil events is lower than visible presumably because of strong liquid water absorption at the IR wavelength. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 10, 1980
- Accession Number
- ADA087003
Entities
People
- Joseph A. Curcio
- Kenneth M. Haught
- Michael A. Woytko
Organizations
- United States Naval Research Laboratory