Document Details


Title:
OPERATION HARDTACK - PROJECT 6.6, X-BAND RADAR DETERMINATION OF NUCLEAR - CLOUD PARAMETERS (DELETED)
Author(s):
BASTIAN, C W [UNITED STATES ARMY - DEPARTMENT OF]; ROBBIANI, R [UNITED STATES ARMY - DEPARTMENT OF]; HARGRAVE, J [UNITED STATES ARMY - DEPARTMENT OF]
Subject Terms:
HARDTACK I OPERATION; RADIOACTIVE CLOUDS; FIR EVENT; KOA EVENT; MEASURING METHODS; MEASURING INSTRUMENTS
Document Location:
Location - NNSA/NSO Nuclear Testing Archive Address - P.O. Box 98521 City - Las Vegas State - NV Zip - 89193-8521 Phone - (702)794-5106 Fax - (702)862-4240 Email - CIC@NV.DOE.GOV
Document Type:
REPORT
Publication Date:
1960 Apr 29
Declassification Status:
Sanitized
Document Pages:
0037
Accession Number:
NV0051058
Document Number(s):
WT1640EX
Originating Research Org.:
UNITED STATES ARMY - DEPARTMENT OF
OpenNet Entry Date:
1994 Aug 26
Description/Abstract:
THE GENERAL OBJECTIVES OF PROJECT 6.6 WERE TO MAKE OBSERVATIONS WITH W ITH WEATHER RADAR SET AN/CPS-9 IN ORDER TO DETERMINE WHAT CHARACTERIST ICS AND PARAMETERS OF A NUCLEAR DETONATION COULD BE DETECTED WITH X-BA ND RADAR. EQUIPMENT WAS LOCATED AT ENIWETOK, RONGELAP, AND KWAJALEIN DURING THE EPG DETONATIONS, AND AT JOHNSTON ISLAND AND MAUI ISLAND, T. H., FOR THE HIGH-ALTITUDE MISSILE SHOTS. THE AN/CPS-9'S WERE MODIFIED TO GIVE RANGE-HEIGHT-INDICATOR SCALES OF 150,000 AND 300,000 FEET IN ADDITION TO THE NORMAL 50,000-FOOT HEIGHT, AND ALSO TO ALLOW SURVEILLA NCE TO RANGES OF ABOUT 400 MILES. DATA WAS REDUCED WITH THE AID OF A MICROFILM VIEWER AND ENLARGED PRINTS OF FILM RECORDINGS. THE SHOT FIR CLOUD WAS OBSERVED AT A 201-MILE RANGE; THIS WAS THE MAXIMUM DETECTIO N RANGE FOR PROJECT 6.6. THE LONGEST PERIOD OF OBSERVATION WAS 4 1/2 HOURS (SHOT KOA). DATA WAS OBTAINED ON THE FOLLOWING CLOUD PARAMETERS : RATE OF RISE, RATE OF GROWTH, MAXIMUM HEIGHT, MAXIMUM DIAMETER, RANG E, AND AZIMUTH. NO SIGNIFICANT RETURNS WERE RECEIVED FROM ANY OF THE HIGH-ALTITUDE DETONATIONS. FOR SURFACE OR NEAR-SURFACE BURSTS, THE RA NGE OF DETECTION WITH RADAR SET AN/CPS-9 IS THE LINE-OF-SIGHT DISTANCE TO THE RESULTING CLOUD, EXCEPT UNDER CONDITIONS OF ANOMALOUS PROPAGAT ION. THE DURATION OF DETECTION IS FOUR TO SIX TIMES AS LONG IN HUMID AS IN DRY AREAS. THE RANGE, AZIMUTH, AND RATE OF VERTICAL AND HORIZON TAL DEVELOPMENT OF NUCLEAR CLOUDS CAN BE MEASURED WITHIN THE ACCURACIE S OF THE RADAR EQUIPMENT. FOR HIGH-ALTITUDE BURSTS, THERE ARE INSUFFI CIENT PARTICLES AND ELECTRON DENSITIES TO PRODUCE ECHOES ON RADAR SET AN/CPS-9. IT IS RECOMMENDED THAT SIMILAR STUDIES BE CONDUCTED DURING FUTURE OPERATIONS WITH RADAR SETS SUCH AS THE AN/MPS-34, AS WELL AS LO NGER-WAVE LENGTH SETS. FURTHER STUDIES SHOULD BE MADE TO CORRELATE TH E OBSERVED RADAR IMAGE WITH VARIOUS PHENOMENA CONNECTED WITH NUCLEAR D ETONATIONS.


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