Accession Number:

AD0296583

Title:

SYMMETRY PATTERN RECOGNITION SYSTEM II

Descriptive Note:

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s):

Report Date:

1963-01-10

Pagination or Media Count:

74.0

Abstract:

Automatization of satellite detection in the SPASUR system requires a means of discriminating against nonsatellite responses. Earlier, a study of SPASUR automatic gain control agc amplitude response led to developing a pattern recognitions system based upon the inherent symmetry of a typical signal due to a satellite pass. A presentation is given of the Symmetry Recognition System II, and the technical performance at the San Diego Space Surveillance Station. In a 10-hour period, 106 alerts were generated 20 were satellites correctly called symmetrical, and 39 were nonsatellites. Symmetry responses were generated on 14 alerts some may have been due to remote, unverified satellite passes. No symmetry response was given to 33 verified satellites. Seven of these passes were missed due to agc pattern distortion by the SPASUR comb-filter switching action. Of the remaining signals, 25, below the agc noise level, could not be examined for symmetry. Design advances in the SPASUR system minimized the requirement for pattern recognition processing.

Subject Categories:

  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE