Accession Number : AD0467419


Title :   HF RADIO MEASUREMENTS OF THE HIGH-ALTITUDE ACOUSTIC EFFECTS OF A GROUND- LEVEL EXPLOSION


Descriptive Note : Technical rept.


Corporate Author : STANFORD UNIV CA STANFORD ELECTRONICS LABS


Personal Author(s) : Griffiths, L J ; Barry, G H ; Taenzer, J C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/467419.pdf


Report Date : May 1965


Pagination or Media Count : 44


Abstract : An hf radio experiment was performed to measure the high-altitude effect of the vertically traveling pressure wave resulting from a large ground- level explosion. The blast--Project Snowball--consisted of 500 tons of TNT and was detonated at the Suffield Experimental Station, Alberta, Canada, July, 1964. The ionospheric disturbance was monitored using vertical-incidence, phase- sensitive sounders located 85 km from ground zero. Simple, linear, acoustic theory was used to calculate the onset time, amplitude, and period of the radio- signal disturbance. These calculations agree closely with measurements taken by the vertical-incidence sounders--onset time was predicted within 10 sec, and both amplitude and period agreed within a factor of two.


Descriptors :   *SURFACE BURST , ALBERTA , BLAST , DATA PROCESSING , EXPLOSION EFFECTS , HIGH ALTITUDE , HIGH FREQUENCY , IONOSPHERIC DISTURBANCES , MONITORS , PHASE METERS , PROPAGATION , RADIO INTERFERENCE , SHOCK WAVES , TNT


Subject Categories : Explosions


Distribution Statement : APPROVED FOR PUBLIC RELEASE