Accession Number:

ADA235548

Title:

A High Resolution Statistical Characterization of Fading on Meteor Communication Channels.

Descriptive Note:

Scientific rept. No. 4

Corporate Author:

LOWELL UNIV MA CENTER FOR ATMOSPHERIC RESEARCH

Personal Author(s):

• Weitzen, Jay A.
• Ostergaard, Jens C.
• Li, Siu W.

Report Date:

1990-11-01

Pagination or Media Count:

34.0

Abstract:

This documents describes the second part of statistical study of fading on meteor communication channels based on data obtained from the Geophysics Laboratorys High Latitude Meteor Scatter Test Bed. In this experiment the sampling rate is increased from 100 Hz to 2000 Hz to provide resolution of 0.5 ms. Trails at 45 MHz from both the Sondrestrom Thule, and Sondrestrom Narsarsuaq links are considered. Trails are classified as underdense or overdense using a modified version of the GL automatic classification routine. Trails are then analyzed for fades with depths exceeding 3,6, and 9 dB relative to a 10 dB Signal-to-Noise threshold. Signal-to-noise ratios are considered relative to bandwidths which vary from 4.8 kHz to 128 kHz. Statistics are computed as a function of frequency, time of day, and trail type for the first D seconds of a trail, where D 50, 100, 200, 400, and 600 ms. The experiment considers fades with 1 ms minimum duration with a resolution of 0.5 ms.

Descriptors:

• *COMMUNICATION AND RADIO SYSTEMS
• *BANDWIDTH
• *SIGNAL TO NOISE RATIO
• *METEORS
• SAMPLING
• CLASSIFICATION
• DAY
• STATISTICAL ANALYSIS
• GEOPHYSICS
• CHANNELS
• TIME
• HIGH RESOLUTION
• RATES
• GREENLAND
• AUTOMATION

Subject Categories:

• Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE