Accession Number : AD0890392

Title :   Advanced Development Model High Frequency Interferometer Single Site Location System.

Descriptive Note : Quarterly rept. no. 3, 11 Apr-11 Jun 71,

Corporate Author : SOUTHWEST RESEARCH INST SAN ANTONIO TX

Personal Author(s) : Mathews, R. B. ; Johnson, R. L. ; Smith, G. A. ; Sherrill, W. M.

Report Date : DEC 1971

Pagination or Media Count : 90

Abstract : Progress during third quarter in the design and fabrication of an advanced development model of an HF interferometer and SSL system is summarized. Emphasis is placed on system software for the real time operating system and man-machine interactions. System decision tables used to respond to the control panel and a control system design procedure are described. Control program and frame calculation flow charts are described. A programming plan calling for early operation of critical tasks is presented. The status of hardware development and fabrication is presented together with equipment photographs. (Author)

Descriptors :   (*POSITION FINDING, RADIO TRANSMITTERS), (*RADIO INTERFEROMETERS, HIGH FREQUENCY), (*DIRECTION FINDING, TARGET ACQUISITION), (*DIGITAL COMPUTERS, INTERFACES), COMPUTER PROGRAMMING, CONTROL PANELS, DISPLAY SYSTEMS, DECISION THEORY, LOGIC CIRCUITS, REAL TIME.

Subject Categories : Computer Programming and Software
      Computer Hardware
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE