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Title: Satellite measurement of ionospheric-induced vhf distortion

Abstract

BLACKBEARD is a satellite RF experiment designed to study distortion and interference effects on transient transionospheric VHF signals. RF distortion will be characterized by a frequency-coherence bandwidth for different ionospheric conditions. Limitations of broad-band measurements from the frequency-coherence bandwidth of the ionosphere and broadcast interference signals will be established through these studies. Distinction between multi-path distortion resulting from large scale, coherent perturbations and small scale, random perturbations to the ionosphere will be emphasized. Ionospheric transfer function models, trans-ionospheric signal predictions, and coherence bandwidth predictions will be tested and optimized with these measurements. A global data base for both broadcast and lightning interference will also derive from these studies. This database will form the basis for interference feature extraction, signal typing, and possible neural network cataloging. The specific missions of the BLACKBEARD experiment include: perform broad-band VHF measurements of transient signals originating from a controlled pulsed ground beacon, to characterize broad-band ionospheric distortion, perform narrow-band VHF measurements of cw signals from a multi-chord interferometry ground beacon array, to characterize ionospheric structure contributing to transmission distortion, and survey power envelopes of lightning and man-made interference in selectable VHF bands, for background rejection purposes. BLACKBEARD is part of the ALEMS soft x-ray measurementmore » satellite, a small satellite system designed for a PEGASUS launch into a 70{degrees} inclination, low earth orbit in late 1992.« less

Authors:
; ; ; ;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (United States)
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
7265444
Report Number(s):
LA-UR-92-2608; CONF-9207118-3
ON: DE92040328
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Beacon satellite symposium, Boston, MA (United States), 5-12 Jul 1992
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; IONOSPHERE; SIGNAL DISTORTION; SATELLITES; MEASURING METHODS; MHZ RANGE; RADIOWAVE RADIATION; EARTH ATMOSPHERE; ELECTROMAGNETIC RADIATION; FREQUENCY RANGE; PLANETARY IONOSPHERES; RADIATIONS; 420200* - Engineering- Facilities, Equipment, & Techniques; 661300 - Other Aspects of Physical Science- (1992-)

Citation Formats

Armstrong, W T, Murphy, T, Roussel-Dupre, R, Carter, M J, and Blevins, B. Satellite measurement of ionospheric-induced vhf distortion. United States: N. p., 1992. Web.
Armstrong, W T, Murphy, T, Roussel-Dupre, R, Carter, M J, & Blevins, B. Satellite measurement of ionospheric-induced vhf distortion. United States.
Armstrong, W T, Murphy, T, Roussel-Dupre, R, Carter, M J, and Blevins, B. 1992. "Satellite measurement of ionospheric-induced vhf distortion". United States.
@article{osti_7265444,
title = {Satellite measurement of ionospheric-induced vhf distortion},
author = {Armstrong, W T and Murphy, T and Roussel-Dupre, R and Carter, M J and Blevins, B},
abstractNote = {BLACKBEARD is a satellite RF experiment designed to study distortion and interference effects on transient transionospheric VHF signals. RF distortion will be characterized by a frequency-coherence bandwidth for different ionospheric conditions. Limitations of broad-band measurements from the frequency-coherence bandwidth of the ionosphere and broadcast interference signals will be established through these studies. Distinction between multi-path distortion resulting from large scale, coherent perturbations and small scale, random perturbations to the ionosphere will be emphasized. Ionospheric transfer function models, trans-ionospheric signal predictions, and coherence bandwidth predictions will be tested and optimized with these measurements. A global data base for both broadcast and lightning interference will also derive from these studies. This database will form the basis for interference feature extraction, signal typing, and possible neural network cataloging. The specific missions of the BLACKBEARD experiment include: perform broad-band VHF measurements of transient signals originating from a controlled pulsed ground beacon, to characterize broad-band ionospheric distortion, perform narrow-band VHF measurements of cw signals from a multi-chord interferometry ground beacon array, to characterize ionospheric structure contributing to transmission distortion, and survey power envelopes of lightning and man-made interference in selectable VHF bands, for background rejection purposes. BLACKBEARD is part of the ALEMS soft x-ray measurement satellite, a small satellite system designed for a PEGASUS launch into a 70{degrees} inclination, low earth orbit in late 1992.},
doi = {},
url = {https://www.osti.gov/biblio/7265444}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {1}
}

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