Accession Number : ADA310492

Title :   Operation Ivy Pacific Proving Grounds Project 10.1, Timing and Firing and Fiducial Markers.

Corporate Author : EDGERTON GERMESHAUSEN AND GRIER INC BOSTON MA

Personal Author(s) : Grier, H. E.

PDF Url : ADA310492

Report Date : NOV 1952

Pagination or Media Count : 64

Abstract : Project 10.1 was set up for the purpose of providing a remote-control system capable of arming, firing, and monitoring vital information from a surface-detonated device. It provided accurate timing signals to a group of stations scattered about the atoll for both a surface shot and an airdrop. It also made a provision for zero world-time determination. Mike Shot was armed and fired by means of a remote-control system from a control station aboard the U. S. S. Estes. A radio signal from this control station started the sequence timer at the central control station, which, in turn, initiated a series of timing signals to various experimenters and armed and fired the device. Certain information of importance to cryogenics groups and the firing party was monitored by means of a microwave television system, with the receiver located aboard the U. S. S. Estes. Zero time was given to other ex- perimeters by means of fiducial markers, Blue Boxes, and radio tones. King Shot timing procedure was similar to that of previous airdrops. This shot required no television coverage, and the central Control Point (CP) was located on Parry Island. Results on both shots were satisfactory with the exception of the operation of the Blue Boxes, some of which failed to trigger, primarily owing to the unexpected low light level. The performance of the system used on Operation Ivy proved both reliable and accurate and appears well justified for use on future operations of this sort.

Descriptors :   *REMOTE CONTROL, *TIMING DEVICES, *ARMING DEVICES, *FIRING CIRCUITS, STATIONS, SURFACE BURST, ACCURACY, MICROWAVE EQUIPMENT, TELEVISION SYSTEMS, BOXES, SEQUENCES, CONTROL CENTERS, SIGNALS, AIR DROP OPERATIONS, CENTRALIZED, RADIO SIGNALS, CRYOGENICS, LOW LIGHT LEVELS, ATOLLS.

Subject Categories : Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE