Accession Number : AD0600637

Title :   WEAPON SYSTEM 107A-1. MARK 3 ADVANCED RE-ENTRY VEHICLE PROGRAM. STAR TRACKER.

Descriptive Note : Final summary rept. Subtask II-2

Corporate Author : GENERAL ELECTRIC CO PHILADELPHIA PA MISSILE AND SPACE DIV

Personal Author(s) : Hawn,C. D.

Report Date : 15 NOV 1961

Pagination or Media Count : 15

Abstract : The data resulting from this program demonstrated that: A star tracker meeting the design specifications could be built with size, weight, and power consumption capabilities that would be compatible with space vehicle requirements as of mid-1960. The critical subsystems are as follows: (a) Optical: This subsystem would have a lens with a 12-inch focal length and 3-inch clear aperture, made of crown and low-index flint glass with an air space. Available materials permit transmission of ultraviolet light at wavelengths between 3500 and 4000 angstroms. (b) Scanning system: Mechanical scanning would be used with a photomultiplier as a detector. A vibrating reed scanner is preferred. (c) Detector system: While a vidicon technique offers advantages because of size, ruggedness and sensitivity, the initial design (mid-1960) would utilize an RCA type 1P21 photomultiplier, a proven tube with long operating lifetime, as the detector. (d) Electronics: A block diagram of a workable system was developed. (Author)

Descriptors :   (*WEAPON SYSTEMS, SYSTEMS ENGINEERING), (*REENTRY VEHICLES, CONTROL SYSTEMS), (*STAR TRACKERS, FEASIBILITY STUDIES), SPACECRAFT, CELESTIAL GUIDANCE, NAVIGATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE