Report Number(s): Document Type: AD-A-995349/8/XAB Report Language: English Journal Announcement: EDB8611 Availability: NTIS, PC AO3/MF AOl. Subfile: ERA (Energy Research Abstracts). GRA Country of Origin: United States Country of Publication: United States (NTIS NTS) Abstract: The objective of Project 8.8 during the Nevada Test Site phase of Operation Hardtack was to investigate the thermal phenomena resulting from the detonation of fractional-kiloton-yield nuclear devices. Measurements were made by the Air Force Cambridge Research Laboratories on six bursts with yields less than 1 kt. To provide correlation with the data, additional measurements were made on four bursts with yields greater than a kiloton. Major Descriptors: *HARDTACK PROJECT; *NUCLEAR EXPLOSIONS -- THERMAL RADIATION Descriptors: BOLOMETERS; COMPARATIVE EVALUATIONS; INFRARED SPECTRA; NEVADA Broader Terms: ELECTROMAGNETIC RADIATION; EXPLOSIONS; FEDERAL REGION IX; MEASURING f[NSTRUMENTS; NORTH AMERICA; NUCLEAR EXPLOSIONS; RADIATIONS; SPECTRA; USA Subject Categories: 450202* Weaponry -~- (-1989) 10/5/526 01877559 Author(s): Title: -- Explosions & Explosives -- Nuclear --~ (Item 226 from file: 103) ERA-12-005101; EDB-87-005192 Baker, E.; Viars, Operation Hardtack. phenomena Corporate Source: Monmouth, NJ T.; McAfee, Project 6.5. W.S.; Balton, I.A. Radar determination of fireball Army Signal Research and Development Lab., (USA) Publication Date: 1 Sep 1985 . p 69 Fort Report Number(s): AD-A-995347/2/XAB Document Type: Report Language: English Journal Announcement: EDB8611 Availability: Subfile: NTIS, PC A04/MF AOl. ERA (Bnergy Research Abstracts). GRA (NTIS NTS) Country of Origin: United States Country of Publication: United States Abstract: The objectives of this project were to investigate the nature of radar echoes from the fireball produced by atomic detonations, and to determine the feasibility of finding ground zero, height-~-of-burst, and yield by means of radar echoes. It was concluded that no radar echoes were received from the fireballs of any Hardtack detonations. For surface shots, radar techniques can be used to determine ground zero to an accuracy of + or - 140 feet. The proportionality between maximum target size and yield of the device indicated that maximum size might be used as a rough measure of yield. Major Descriptors: *HARDTACK PROJECT; FIREBALLS; *NUCLEAR FIREBALLS Descriptors: HEIGHT; RADAR; *NUCLEAR EXPLOSIONS REFLECTION; Broader Terms: DIMENSIONS; EXPLOSIONS; NUCLEAR EXPLOSIONS; RANGE FINDERS Subject Categories: 450202* Weaponry -- 10/5/527 01877558 Author(s): Title: YIELDS FIREBALLS; -~- NUCLEAR MEASURING INSTRUMENTS; -- Explosions & Explosives -- Nuclear -- (-1989) _ (Item 227 from file: 103) BRA-12-005100; EDB-87-005191 Lavicka, F.; Lang, Operatign Hardtack. G. Project 6.4. from nuclear detonations Corporate Source: Monmouth, NJ Publication Date: Wave form of electromagnetic pulse Army Signal Research and Development Lab., (USA) 1 Sep 1985 9003801 p 29 Fort