Country of Publication: United States Abstract: The objective of Project 6.1 (CASTLE) was to determine whether the equipment-operating procedures used in obtaining radar scope photos for IBDA (Indirect Bomb Damage Assessment) of previous A-bomb tests were valid for thermonuclear weapons. The procedures for obtaining the radar photos involved positioning of bombers at a safe distance from ground zero at operational altitudes, with radar scanning ground zero during, and immediately after, the weapon burst. The photography obtained on each shot was generally good. The conclusions are that a high yield weapon burst can be readily detected by the bomber’s radar, and that present equipment~-operating techniques are adequate. These conclusions must be qualified.; Major Descriptors: *CASTLE PROJECT; *THERMONUCLEAR EXPLOSIONS -- DETECTION; *THERMONUCLEAR EXPLOSIONS -- PHOTOGRAPHY Descriptors: DAMAGE; RADAR Broader Terms: EXPLOSIONS; MEASURING INSTRUMENTS; NUCLEAR EXPLOSIONS; RANGE FINDERS Subject Categories: 450200* -- Military Technology, Defense -- Nuclear Explosions & Explosives 10/5/767 (Item 467 from file: 103) 00829667 ERA-07-005352; EDB-82-004503 Author(s): Willey, R.L.; Young, G.A.; Aronson, Title: Base surge measurements by photography Corporate Source: Publication Date: Naval Ordnance Lab., Sep 1955 Report Number(s): AD-361766 Document Type: Report p 34 Weaponry, & National C.J. White Oak, MD (USA) Language: English Journal Announcement: EDB8107 Availability: NTIS, PC A03/MF AOl. Subfile: ERA (Energy Research Abstracts); NTS (NTIS). Country of Origin: United States Country of Publication: United States Abstract: The major objective of Project 1.lc was the study of base surge phenomena on the Operation CASTLE shots by means of photography. No pictures of base surges were obtained, but aerial photographs for other projects indicated that base surges might have formed at times when the illumination was inadequate for surface photography. This cannot be established with certainty. Radar scope photography proved to be useful for indicating the region of heavy fallout. Further studies of this type would be recommended only for tests conducted during daylight hours. ; Major Descriptors: *CASTLE PROJECT; Descriptors: FALLOUT Broader Terms: EXPLOSIONS; *NUCLEAR EXPLOSIONS NUCLEAR EXPLOSIONS Subject Categories: 450200* -- Military Technology, Defense -- Nuclear Explosions & Explosives 10/5/768 00829666 Author(s): Weaponry, & National (Item 468 from file: 103) ERA-07-005351; EDB-82-004502 Rinnert, H.R. Publication Date: Report Number(s): 5 Jul 1959 AD-357967 San Francisco, CA 2003944 Title: Ship-shielding studies Corporate Source: Naval Radiological Defense Lab., (USA) -- PHOTOGRAPHY p 92 Document Type: Report Language: English Journal Announcement: EDB8107 Availability: NTIS, PC AO5/MF AOl1. Subfile: ERA (Energy Research Abstracts); NTS Country of Origin: United States (NTIS). Country of Publication: United States Abstract: The principal objectives of this project were to determine, for