Accession Number : ADA995429

Title :   OPERATION DOMINIC, FISH BOWL SERIES. Project Officer's Report. Project 7.2b. Microwave Radiometric Measurements,

Corporate Author : MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s) : Towle,D. M. ; Baiser,M. ; Kirwan,J. J. ; Pannell,J. H.

Report Date : 01 SEP 1985

Pagination or Media Count : 63

Abstract : The electromagnetic energy incident on ground-based antennas on Johnston Island as a result of the five high-altitude nuclear bursts of the Fish Bowl series was measured in the frequency regions around 925 Mc, 3000 Mc, and 24,500 Mc by the radiometric techniques described in this report. The data, recorded in terms of antenna temperatures, are directly interpretable as physical temperatures of the thermally radiating regions and allow the deduction of the attenuation encountered by radio-frequency signals passing through the burst regions. The time history of the temperatures of the burst region for the three microwave frequencies of the radiometric measurement presented considerable insight into the physical processes occurring during the high-altitude events. Electron densities and recombination rates have been deduced from the radiometric data.

Descriptors :   *NUCLEAR EXPLOSION TESTING, *MICROWAVES, *RADIOMETRY, *ELECTROMAGNETIC PULSES, HIGH ALTITUDE, AIRBURST, THERMAL RADIATION, ATMOSPHERIC ATTENUATION, ELECTRON DENSITY, RECOMBINATION REACTIONS, ANTENNAS, JOHNSTON ISLAND

Subject Categories : Nuclear Instrumentation
      Electromagnetic Pulses

Distribution Statement : APPROVED FOR PUBLIC RELEASE