Results from recordings sade at French frigate Shoals (7FFS) and at
Lualualei, Oahu, are shown in Table 6.2.
Good records were obtained at FFS.
The Hawaii observations are of questionable accuracy; the radio blackout interfered with planned range-setting procedure, amblent mise was recorded which
may have cbscured the blast records, and the aicrobarograph ecquipaent did cot
perform properly in all respects.
\\
—™
However, the important points were adequat-
ely covered by FFS records.
entry of characteristic velocity, sooztiaes called apparent velocity, is the
speed of the wave-front intersection traveling alozg the ground.
It is in-
variant under refraction and se represents horizontal soued velocity
at the altitude level where che blast vave was turced by refracticn back
toward the ground.
Orange.
Pressure recordings asde at Jobnston Island fron Orange shoe
are sucmarized in Table 6.3.
shown in Fig. 6.1.
Data pointes of overpressure distance are also
An average pressure-tire histom is
glotesd in Fiz. 6.3.
a No thromh
/9/) ove deleted.
/b¢