FOG DROPLET GROWTH AND PRECIPITATION-RATE MEASUREMENTS WITH AN ULTRA-VIOLET WAVELENGTH TRANSMISSOMETER.

Abstract

This report describes measurements of radiation fog droplet growth and precipitation-rate. The instrument used was an ultra-violet wavelength transmissometer developed previously by the Federal Aviation Agency as part of its research activities in airfield instrumentation. Measurements were made at Portland (Oregon) International Airport in FY66 and Corvallis, Oregon in FY67. The fog droplet growth measurements were inconclusive, apparently because of an invariance in the .1 to 1.0 micrometers droplet size spectrum as radiation fog forms in continuously saturated air. Precipitation-rate power spectra are found to be similar to those obtained with conventional rain-rate gage data. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 31, 1967
Accession Number
AD0692436

Tags

DTIC Thesaurus Topics

  • Airports
  • Diffractometers
  • Instrumentation
  • International Airports
  • Invariance
  • Landing Fields
  • Measurement
  • Measuring Instruments
  • Micrometers
  • Power Spectra
  • Precipitation
  • Radiation
  • Spectra
  • Transmissometers

Readers

  • Atmospheric Remote Sensing.
  • Pavement Materials Engineering.