Accession Number:

ADA026888

Title:

Digital Tone Ranging Modem. Design and Implementation.

Descriptive Note:

Final rept. Jul 71-Jun 72,

Corporate Author:

TRANSPORTATION SYSTEMS CENTER CAMBRIDGE MASS

Personal Author(s):

Report Date:

1976-05-01

Pagination or Media Count:

66.0

Abstract:

The report describes a digital ranging modem implementation based on side-tone ranging concepts. The ranging technique implemented and tested in the DOTTSC avionics laboratory has direct application to the AEROSAT surveillance system. The performance of a breadboard unit was observed in the laboratory as well as under actual aeronautical and maritime experiments conducted with the NASA ATS-6 satellite. The technique demonstrated an acquisition probability of 0.98 for a signal-to-noise power density ratio, CNo, of 37 dB-Hz. The ranging precision of the modem for CNo50 dB-Hz is less than 66 meters. Circuit schematics, test data, test results and analyses are included in this report along with recommendations for future applications of the demonstrated hardware.

Subject Categories:

  • Air Navigation and Guidance

Distribution Statement:

APPROVED FOR PUBLIC RELEASE