Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
1982-09-01 |
タイトル |
|
|
言語 |
en |
|
タイトル |
Efficient coding and resonance spike identification for topside ionogram processing |
言語 |
|
|
言語 |
eng |
資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
departmental bulletin paper |
ページ属性 |
|
|
内容記述タイプ |
Other |
|
内容記述 |
P(論文) |
著者名(英) |
Igi, Seiji
Aikyo, Kazuhiro
Nishizaki, Ryo
Ogata, Takanobu
Maruyama, Takashi
Hirasawa, Takeo
|
著者所属(英) |
|
|
|
en |
|
|
Radio Research Laboratories/Radio Research Laboratories/Radio Research Laboratories/Radio Research Laboratories/Radio Research Laboratories/National Institute of Polar Research |
抄録(英) |
|
|
内容記述タイプ |
Other |
|
内容記述 |
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. |
雑誌書誌ID |
|
|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA00733561 |
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue
巻 22,
p. 140-154,
発行日 1982-09
|