Accession Number : ADA296859

Title :   Operation Greenhouse: Scientific Director's Report of Atomic Weapon Tests at Eniwtok, 1951. Annex 8.3. Special Radar, Radio, and Photographic Studies of Weapons Effects. Nuclear Explosions. Parts 1, 2, 3 and 4.

Corporate Author : LOS ALAMOS SCIENTIFIC LAB ALBUQUERQUE NM

PDF Url : ADA296859

Report Date : 1951

Pagination or Media Count : 395

Abstract : Radar echoes have been observed during previous atomic detonations but with little additional data. Measurements on echo intensity and characteristics were obtained and recorded by use of an X-band radar system. To accomplish the desired results, the video signals from the AN/APQ-24 radar receivers, one located in each of two B-50D aircraft, were displayed on a calibrated oscillograph and photographed with a low-speed conventional 35-mm movie camera at 32 frames/sec and a modified General Radio 651 AE oscillograph camera operating at 27 ft/sec. The radar signals were displayed on a DuMont 294-A oscillograph with a 5xP11 cathode-ray tube operating at a 12-kv acceleration voltage to obtain sufficient light intensity for recording. The photographic recordings thus obtained were used for further analysis to determine the value of the data. (MM)

Descriptors :   *NUCLEAR EXPLOSION TESTING, *PHOTOGRAPHY, *RADAR RECEIVERS, *NUCLEAR EXPLOSION DETECTION, *RADIO WAVES, *RADAR PHOTOGRAPHY, YIELD(NUCLEAR EXPLOSIONS), ACCELERATION, SHOCK WAVES, AIRBORNE, VOLTAGE, EXPLOSION EFFECTS, ECHOES, WAVE PROPAGATION, PHOTOGRAPHIC FILM, CALIBRATION, RADAR SIGNALS, ALTITUDE, RADIO SIGNALS, X BAND, DETONATIONS, BOMBER AIRCRAFT, CATHODE RAY TUBE SCREENS, IONOSPHERIC DISTURBANCES, DELAY CIRCUITS, HIGH SPEED CAMERAS, GROUND ZERO.

Subject Categories : Photography
      Active & Passive Radar Detection & Equipment
      Nuclear Weapons
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE