Accession Number:

AD0360459

Title:

STUDY OF VERY-HIGH-ALTITUDE BURSTS WITH AIRBORNE UHF RADAR

Descriptive Note:

Corporate Author:

MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Report Date:

1960-07-11

Pagination or Media Count:

62.0

Abstract:

The principal objective of this experiment was to study the backscattering of electromagnetic radiation caused by products of high-altitude nuclear detonations in the UHF radar band. Two airborne radars were instrumented on frequencies of 425 and 675 mc. Several other measurements on propagation effects were undertaken. The results indicated a pronounced effect which is significant for both scientific and operational considerations. Reflective effects occurred for nearly an hour after the detonation. Apparent absorption predominated for a period of approximately a minute or less, and was less for the higher burst altitude. This period was followed by one of reflection or refraction, which lasted in some form for almost an hour. The initial reflections indicated a medium of randomly distributed electron density. Gradually, a shift took place to elongated reflecting regions aligned with the earths magnetic field, similar in reflective properties to those observed from natural aurora by previous experimenters.

Subject Categories:

  • Active and Passive Radar Detection and Equipment
  • Nuclear Weapons
  • Electricity and Magnetism
  • Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE