Te.
ANS TRACT
———
ASTLE,; in offsite monitoring sregram was conducted in the Central
‘
oe awest Pact fe to document and to provide current meassrenents ct
“avy patrol alreraft, equipped with gare radia
va fallout.
aeynactl
ant
ne ee
trunenta,
were iispatched over planced reutes to neasure
ree
se mie
ee as orasence hat heen detected by automat +: FaeE
‘f these were collecting a cuntimous meord on selected
“a
ne
pall,
caroline, ard “aviina Islands.
v
es
kir suvvey amsutements
ere
mt
tact to grounl intensities inmeciately unm receint by reans 3f
over a
er res permitting anrrs ist of tea radiulopi~? situacvion
samme neamiserents
we nreed areas Auxit tary stations ».Uélding dally
Meee oeated beyond the network of automatic stations.
niin the
sumlative
ve cadiation
accounte: for a major cart of the tetal cumiat
YO
seed inctng the program. Tha greatest radiation rates xtra.
oss
12.6¢ r. rfr, , securred at Rongelap ; after BPAVO.
,
Cs measurements,
from dicvet
atvvar mS sation
Values ‘oth greater and4 leaser than th {s probably occurrec at
:
latands in the Rongelap
atoll. The
grea test estimated cumulative radiatto
1
scaurricg from any event until the next following was 190 r ae geen
Le
after SUP. The total cumilative radiation at Rongerik was
thod combined fixed contimous stations and asrial surveys.
4
~ ieantagee of cach method was utilized so that they were Stnya
ttapiA, accurate informat ton about radioactive fallout was provi af
means wich probably represents tia maximen in economy for such exter!
coverage.
The SCI APTTER, a sensitive, wide range scintillation type zanm netor
was damnretrated to be a dependable, very protable, facile
aatrument
Puspoges
At the request of DINCYALELT the Soalth ard Safety
and Southwest Facific, exclusive of tae Proving grounds
e)
Currant
fallout infir ation was to be made avel able
to TIMCVAIELT following
gach detane* on.
he propram was to de patterned basically on che
NYO monitoring system developed for IV¥.1
The information derived was used in the immediate
estimation of raiiological hazards In heavy ralicut areas, The
loc_ment a fallow. coastde
tutes a recomt of cumlative radiation produced cheing
the 19h serirge
Organivatione
The sunitoring oroyram was olamnsd and directed
by
the Health and Safety Taboratory, Yaw furk erations
Cffice and ac-
tively cunne ced by several xzeneies, ASL orzvanize
d the furct lone
of the narticirating agenc les, developed greealires,
ani furnished 11
monitoring instruments erplcyed.
‘ie enhall islands.
Serial monitoring usee
1.
Laboratory of the New York Operations Off.cee
organized and tireant
a Drogram to document radicactive fallout “rom
CASTLE in tre Sapir
?.
um lative and peak radiation dosage were seacu red, or cormted oremee
direct reagirements, for all islanmts in the actomtic aoe oa
(atanda within tne two aerial survey ratterns east of
INTPOT CTION
Seals
for
The Pirectar, Wealth ant Safety
Laboratory, was in over-all charge of the program.
The Protect Cffirer
CHAS".) dlrested Speratans in the forwart area.
Orerations were ex-
ecuted in acenrdance with the overating plan "VASL-1Sh -Operati
ng Pro-
cedure, Fallout Monitoring for CASTIE",
Monitoring iastrument cal‘t-
bration and maintenance in the forward area was performed by the
PASL
staff.
Joint Task Force-7 Headquarters orev ided logistic
support and
made available communications facilities tn the forward
ares.
The instrument monitoring pregram censisted cf the following
oteratlanal subdivietons:
le
Fixed Instrument Network
(4)
(o>)
2.
Autom*tic monitoring etatisns
Auxillary monhoring stations
Aerial Survey Monito-ing
Fixed Instrument “letwork
Trereqaed acouracy, mlicbility, and orecisios can be obtaines for future
vurveya of hig nature through certain suggested modifications.
The U. S. Weather Bureau, the U. S, Navy, and the USAF
Air Weather
Service operated fixed automatic gamma monitoring stations
on sites
selected basically to create a uniformly dist-ituted pattern relative
to the test area. The availability of facilities for the oneration
of monitoring equirment was a factor which Limived the mamber of atolls
which could te utilized.
Uniform distribution wa reasonably well
ach feved particularly within the “rst Territory,
~wil-
i