survey, radiation.
Evaluation of the radiation hazards associated with radioactive mater
hls.
“sweet-sour", Aeria} survey radsafe reports made during the test series; connotes uncontapinated (sweet)
or contaminated (sour) aerological conditions.
SWU-NAS, 5.0.
T-AP.
Special Weapons Unit, Naval Air Station, San Diego, California.
Personnel transport (Military Sea Transportion Service}.
TAU.
Test Aircraft Unit.
TOY.
Temporary duty assignment.
Te.
Task Element.
thermal radiation.
Electromagnetic radiation emitted jin two pulses from a surface or airdulist from the
fireball as a conSequence of its very high temperature; it consists essentially of ultflaviolet, visiSle, and infrared radiation.
In the first pulse, when the temperature of the fireballfis extremely
high, ultraviolet radiation predominates; in the second pulse, tne temperatures are loger and most of
the thermal radiation lies in the visible and infrared regions of the spectrum.
thermonuclear fusion. Refers to the processes in which very nigh temperatures are used to
uston of light nuclei, such as those of the hydrogen isotopes (deuterium and tritium)
companying liberation of energy. The high temperatures raquired to initiate the fusio
obtained by means of a fission explosion.
See also fusion.
ing about the
with the acreaction are
TNT equivalent.
A measure of the energy released as the result of the detonation of a nucle r device or
weapon, expressed in terms of the mass of TNT that would release the same amount of ene gy when exploded. The TNT equivalent jis usually stated im kilotons (1,000 tons) or megatons (1 m Tlion tons).
The basis of the TNT equivalence is that the explosion of 1 ton of TNT is assumed to re ase 1 billion
calories of energy. See also megaton, yield.
tropopause. The boundary dividing the stratosphere from the lower part of the atmosphere, th
The tropopause normally occurs at an altitude of about 25,000 to 46,000 feet (7.6 to 13.7%
and temperate zones, and at 55,000 feet (16.8 km) in the tropics. See also stratospherel
troposphere,
troposphere.
km) in polar
troposphere.
The region of the atmosphere, immediately above the Earth's surface and up to tBe tropopause,
In which the temperature falls fairly regularly with increasing altitude, clouds form, chnvection is
active, and mixing is continuous and more or less complete.
Trust Territories.
The Marshal? Islands were Trust Territories under’the jurisdiction of thefUnited Na-
tions. Assigned by the United Nations to the United States in trust far administration, Hevelopment,
and training.
TU.
TSU.
Task Unit.
Test Services Unit.
TSUP.
Test Support Unit Provisional.
TSuU.
Test Support Unit.
FWX.
Pronounced "twix"; teletypwriter exchange.
type commander.
The officer or agency having cognizance over all Navy ships of a given type.
addition ta the particular ship's assignment in a task force or fleet.
UCLA.
University of California, Los Angeles.
UCRL.
University of California Radiation Laboratory, Livermore, California.
UF-1.
The Navy designation for the SA-16A.
UHF.
UK.
his is tn
Used in CASTLE for weather, island resupply, and V§P aircraft.
Ultra-high frequency.
United Kingdom.
ultraviolet. Electromagnetic radiation of wavelengths between the shortest visible violet {abou
angstroms) and soft X-rays {about 100 angstroms).
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