A space-based classification system for RF transients

Moore, K R; Call, D; Johnson, S; Payne, T; Ford, W; Spencer, K; Wilkerson, J F; Baumgart, C

Title: A space-based classification system for RF transients

Full Record
Other Related Research

Abstract

The FORTE (Fast On-Orbit Recording of Transient Events) small satellite is scheduled for launch in mid 1995. The mission is to measure and classify VHF (30--300 MHz) electromagnetic pulses, primarily due to lightning, within a high noise environment dominated by continuous wave carriers such as TV and FM stations. The FORTE Event Classifier will use specialized hardware to implement signal processing and neural network algorithms that perform onboard classification of RF transients and carriers. Lightning events will also be characterized with optical data telemetered to the ground. A primary mission science goal is to develop a comprehensive understanding of the correlation between the optical flash and the VHF emissions from lightning. By combining FORTE measurements with ground measurements and/or active transmitters, other science issues can be addressed. Examples include the correlation of global precipitation rates with lightning flash rates and location, the effects of large scale structures within the ionosphere (such as traveling ionospheric disturbances and horizontal gradients in the total electron content) on the propagation of broad bandwidth RF signals, and various areas of lightning physics. Event classification is a key feature of the FORTE mission. Neural networks are promising candidates for this application. The authors describe the proposedmore »« less

Authors:

Moore, K R; Call, D; Johnson, S; Payne, T; Ford, W; Spencer, K; Wilkerson, J F ^[1]; Baumgart, C ^[2]

Los Alamos National Lab., NM (United States)
EG and G, Inc., Los Alamos, NM (United States)

Publication Date:: Wed Dec 01 00:00:00 EST 1993

Research Org.:: Los Alamos National Lab., NM (United States)

Sponsoring Org.:: USDOE, Washington, DC (United States)

OSTI Identifier:: 10107378

Report Number(s):: LA-UR-93-4185; CONF-9309289-1
ON: DE94003933; TRN: 94:002041

DOE Contract Number:: W-7405-ENG-36

Resource Type:: Conference

Resource Relation:: Conference: International workshop on artificial intelligence applications in solar-terrestrial physics,Lund (Sweden),22-24 Sep 1993; Other Information: PBD: [1993]

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ELECTROMAGNETIC PULSES; CLASSIFICATION; LIGHTNING; RADIOWAVE RADIATION; SATELLITES; MHZ RANGE; TRANSIENTS; VISIBLE RADIATION; DATA PROCESSING; ALGORITHMS; NEURAL NETWORKS; IONOSPHERE; ELECTRON DENSITY; TRAVELLING IONOSPHERIC DISTURBANCE; DATA ACQUISITION SYSTEMS; ATMOSPHERIC PRECIPITATIONS; RESEARCH PROGRAMS; 661300; OTHER ASPECTS OF PHYSICAL SCIENCE

Citation Formats


                    Moore, K R, Call, D, Johnson, S, Payne, T, Ford, W, Spencer, K, Wilkerson, J F, and Baumgart, C. A space-based classification system for RF transients.  United States: N. p., 1993. 
        Web.

Copy to clipboard


                    Moore, K R, Call, D, Johnson, S, Payne, T, Ford, W, Spencer, K, Wilkerson, J F, & Baumgart, C. A space-based classification system for RF transients.  United States.

Copy to clipboard


                    Moore, K R, Call, D, Johnson, S, Payne, T, Ford, W, Spencer, K, Wilkerson, J F, and Baumgart, C. 1993.  
        "A space-based classification system for RF transients".  United States.  https://www.osti.gov/servlets/purl/10107378.

Copy to clipboard


                    
@article{osti_10107378,

  title        = {A space-based classification system for RF transients},

  author       = {Moore, K R and Call, D and Johnson, S and Payne, T and Ford, W and Spencer, K and Wilkerson, J F and Baumgart, C},

  abstractNote = {The FORTE (Fast On-Orbit Recording of Transient Events) small satellite is scheduled for launch in mid 1995. The mission is to measure and classify VHF (30--300 MHz) electromagnetic pulses, primarily due to lightning, within a high noise environment dominated by continuous wave carriers such as TV and FM stations. The FORTE Event Classifier will use specialized hardware to implement signal processing and neural network algorithms that perform onboard classification of RF transients and carriers. Lightning events will also be characterized with optical data telemetered to the ground. A primary mission science goal is to develop a comprehensive understanding of the correlation between the optical flash and the VHF emissions from lightning. By combining FORTE measurements with ground measurements and/or active transmitters, other science issues can be addressed. Examples include the correlation of global precipitation rates with lightning flash rates and location, the effects of large scale structures within the ionosphere (such as traveling ionospheric disturbances and horizontal gradients in the total electron content) on the propagation of broad bandwidth RF signals, and various areas of lightning physics. Event classification is a key feature of the FORTE mission. Neural networks are promising candidates for this application. The authors describe the proposed FORTE Event Classifier flight system, which consists of a commercially available digital signal processing board and a custom board, and discuss work on signal processing and neural network algorithms.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/10107378},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Wed Dec 01 00:00:00 EST 1993},

  month        = {Wed Dec 01 00:00:00 EST 1993}

}

Copy to clipboard

Conference:

View Conference (1.20 MB)

Other availability

Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Classification of RF transients in space using digital signal processing and neural network techniques

Conference Moore, K; Blain, P; Briles, S; ...

The FORTE{prime} (Fast On-Orbit Recording of Transient Events) small satellite experiment scheduled for launch in October, 1995 will attempt to measure and classify electromagnetic transients as sensed from space. The FORTE{prime} payload will employ an Event Classifier to perform onboard classification of radio frequency transients from terrestrial sources such as lightning. These transients are often dominated by a constantly changing assortment of man-made ``clutter`` such as TV, FM, and radar signals. The FORTE{prime} Event Classifier, or EC, uses specialized hardware to implement various signal processing and neural network algorithms. The resulting system can process and classify digitized records of severalmore »« less
Full Text Available
Innovative use of DSP technology in space: FORTE event classifier

Conference Briles, S; Klingner, P; Neagley, D; ...

The Fast On-Orbit Recording of Transient Events (FORTE) small satellite will field a digital signal processor (DSP) experiment for the purpose of classifying radio-frequency (rf) transient signals propagating through the earth`s ionosphere. Designated the Event Classifier experiment, this DSP experiment uses a single Texas Instruments` SMJ320C30 DSP to execute preprocessing, feature extraction, and classification algorithms on down-converted, digitized, and buffered rf transient signals in the frequency range of 30 to 300 MHz. A radiation-hardened microcontroller monitors DSP- abnormalities and supervises spacecraft command communications. On- orbit evaluation of multiple algorithms is supported by the Event Classifier architecture. Ground-based commands determine themore »« less
Full Text Available
Satellite measurement of ionospheric-induced vhf distortion

Conference Armstrong, W; Murphy, T; Roussel-Dupre, R; ...

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 andmore »« less
Satellite measurement of ionospheric-induced vhf distortion

Conference Armstrong, W; Murphy, T; Roussel-Dupre, R; ...

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 andmore »« less
A space-based radio frequency transient event classifier

Conference Moore, K; Blain, C; Caffrey, M; ...

The Department of Energy is currently investigating economical and reliable techniques for space-based nuclear weapon treaty verification. Nuclear weapon detonations produce RF transients that are signatures of illegal nuclear weapons tests. However, there are many other sources of RF signals, both natural and man-made. Direct digitization of RF signals requires rates of 300 MSamples per second and produces 10{sup 13} samples per day of data to analyze. it is impractical to store and downlink all digitized RF data from such a satellite without a prohibitively expensive increase in the number and capacities of ground stations. Reliable and robust data processingmore »« less
Full Text Available

Similar Records