Accession Number:

ADA011924

Title:

Long-Range Sensor Communication.

Descriptive Note:

Final technical rept.,

Corporate Author:

ATLANTIC RESEARCH CORP ALEXANDRIA VA

Personal Author(s):

• Sykes,Charles B.
• Robertson,Richard G.

Report Date:

1975-05-01

Pagination or Media Count:

315.0

Abstract:

A performance study was conducted to determine the feasibility of direct long-range remote sensor communications without the use of relays. Of the propagation modes analyzed, HF ionospheric, MF.HF ground-wave, and forward meteor scatter, the HF ionospheric propagation mode is favored and performance predictions using this mode for digital message transmission are presented. The performance is given in terms of predicted message error rate and circuit outage under various conditions of range, frequency, hour, season, sunspot number and geographic location.

Descriptors:

• *REMOTE DETECTORS
• *COMMUNICATION AND RADIO SYSTEMS
• *INTRUSION DETECTORS
• HIGH FREQUENCY
• LONG RANGE(DISTANCE)
• ERRORS
• GROUND WAVES(ELECTROMAGNETIC)
• MODULATION
• INTRUSION DETECTION
• IONOSPHERIC PROPAGATION
• FORWARD SCATTERING
• MEDIUM FREQUENCY
• DIVERSITY RECEPTION

Subject Categories:

• Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE