Efficient coding and resonance spike identification for topside ionogram processing
This paper describes an effective coding method to eliminate the redundancy contained in digital ionograms and an algorithm to identify the resonance spikes appearing on topside ionograms. This work is a first step toward automatic profile reduction to obtain ionospheric electron density profiles. T...
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Radio Research Laboratories/Radio Research Laboratories/Radio Research Laboratories/Radio Research Laboratories/Radio Research Laboratories/National Institute of Polar Research
1982
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ftnipr:oai:nipr.repo.nii.ac.jp:00001265 2023-05-15T17:10:58+02:00 Efficient coding and resonance spike identification for topside ionogram processing Seiji Igi Kazuhiro Aikyo Ryo Nishizaki Takanobu Ogata Takashi Maruyama Takeo Hirasawa 1982-09 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1265 http://id.nii.ac.jp/1291/00001265/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1265&item_no=1&attribute_id=18&file_no=1 en eng Radio Research Laboratories/Radio Research Laboratories/Radio Research Laboratories/Radio Research Laboratories/Radio Research Laboratories/National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1265 http://id.nii.ac.jp/1291/00001265/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 22, 140-154(1982-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1265&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1982 ftnipr 2022-11-12T19:42:05Z This paper describes an effective coding method to eliminate the redundancy contained in digital ionograms and an algorithm to identify the resonance spikes appearing on topside ionograms. This work is a first step toward automatic profile reduction to obtain ionospheric electron density profiles. Topside sounder data recorded by ISIS-2 satellite are digitized and converted to digital ionograms. A quantitative comparison of data compression techniques, based on the run-length and predictive coding method, is made and leads the conclusion that the modified run-length coding method is most effective and useful from the practical view point. This simulation experiment results in self-consistent determination of characteristic frequencies with good accuracy except for the ionograms with obscure resonance spikes. Report Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
This paper describes an effective coding method to eliminate the redundancy contained in digital ionograms and an algorithm to identify the resonance spikes appearing on topside ionograms. This work is a first step toward automatic profile reduction to obtain ionospheric electron density profiles. Topside sounder data recorded by ISIS-2 satellite are digitized and converted to digital ionograms. A quantitative comparison of data compression techniques, based on the run-length and predictive coding method, is made and leads the conclusion that the modified run-length coding method is most effective and useful from the practical view point. This simulation experiment results in self-consistent determination of characteristic frequencies with good accuracy except for the ionograms with obscure resonance spikes. |
format |
Report |
author |
Seiji Igi Kazuhiro Aikyo Ryo Nishizaki Takanobu Ogata Takashi Maruyama Takeo Hirasawa |
spellingShingle |
Seiji Igi Kazuhiro Aikyo Ryo Nishizaki Takanobu Ogata Takashi Maruyama Takeo Hirasawa Efficient coding and resonance spike identification for topside ionogram processing |
author_facet |
Seiji Igi Kazuhiro Aikyo Ryo Nishizaki Takanobu Ogata Takashi Maruyama Takeo Hirasawa |
author_sort |
Seiji Igi |
title |
Efficient coding and resonance spike identification for topside ionogram processing |
title_short |
Efficient coding and resonance spike identification for topside ionogram processing |
title_full |
Efficient coding and resonance spike identification for topside ionogram processing |
title_fullStr |
Efficient coding and resonance spike identification for topside ionogram processing |
title_full_unstemmed |
Efficient coding and resonance spike identification for topside ionogram processing |
title_sort |
efficient coding and resonance spike identification for topside ionogram processing |
publisher |
Radio Research Laboratories/Radio Research Laboratories/Radio Research Laboratories/Radio Research Laboratories/Radio Research Laboratories/National Institute of Polar Research |
publishDate |
1982 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1265 http://id.nii.ac.jp/1291/00001265/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1265&item_no=1&attribute_id=18&file_no=1 |
genre |
Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Memoirs of National Institute of Polar Research Polar Research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1265 http://id.nii.ac.jp/1291/00001265/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 22, 140-154(1982-09) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1265&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766067743631605760 |