Study on a high performance and multifunictional software receiver for plasma wave instrument

高性能多功能等离子波仪器软件接收器的研究

• 批准号: 17560370
• 负责人: KASAHARA Yoshiya
• 金额: $ 2.37万
• 依托单位: Kanazawa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17560370/
• 关键词: Scientific satellite; Plasma wave instrument; Data selection; Data compression; Signal processing; Autonomous controlled software; Radio Science; Magnetospheric physics; 発見的アルゴリズム; 宇宙環境計測

We studied optimal algorithms for a software receiver onboard scientific satellite. For the purpose of designing optimal onboard software which obtains the maximum scientific output of the plasma physics, we examined several algorithms for data selection and data compression as well as signal processing for spectral analysis to be performed on a plasma wave instrument onboard the satellite. The main conclusions are summarized as follows:1. In order to obtain spectral data from wideband waveform capture using software installed on an onboard CPU, we proposed an optimal analyses method, especially for very low frequency range with a high frequency resolution.2. Data compression algorithm is also important to achieve higher data compression ratio as well as to keep fine data quality for scientific objectives. Both lossless and lossy algorithms are taken into account for the spectrum data. We demonstrated that higher data quality can be obtained by JPEG applying to higher time resolution data than by adaptive range-coder applying to nominal resolution data. As for the waveform data, we proposed a new sub-band ceding method.3. Onboard software processing was simulated using a small CPU, which is compatible to the one used for a scientific satellite. We measure execution times for the proposed data processing methods, and showed optimal parameters for the data processing.4. Automatic data detection and estimation of the dispersion characteristics of the lightning whistlers was developed. We demonstrated that the proposed method is applicable for the data selection for lightning whistlers, and the derived dispersion properties are useful for the reconstruction of a spatial profile of electron density in the plasma sphere.

研究了科学卫星上软件接收机的优化算法。为了设计最佳的星载软件，以获得最大的等离子体物理科学输出，我们研究了几种数据选择、数据压缩以及信号处理的算法，以便在卫星上的等离子体波仪器上进行频谱分析。主要结论如下：1.为了利用安装在车载CPU上的软件从宽带波形捕获中获取频谱数据，提出了一种优化分析方法，特别是在频率分辨率很高的极低频段。数据压缩算法对于获得更高的数据压缩比以及保持良好的数据质量以达到科学目标也是非常重要的。对于频谱数据，同时考虑了无损算法和有损算法。我们证明了应用于较高时间分辨率数据的JPEG可以获得比应用于名义分辨率数据的自适应距离编码器更高的数据质量。对于波形数据，提出了一种新的子带分割方法。星载软件处理使用与科学卫星兼容的小型CPU进行模拟。我们对所提出的数据处理方法的执行时间进行了测量，并给出了数据处理的最佳参数。研制了雷电哨声频散特性的自动数据检测与估计系统。我们证明了该方法适用于闪电哨声的数据选择，所得到的色散特性对于重建等离子体球内电子密度的空间分布是有用的。

项目成果

Evolution of the outer radiation belt during the November 1993 storms driven by corotating interaction regions

• DOI: 10.1029/2006ja012148
• 发表时间: 2007-05
• 期刊: Journal of Geophysical Research
• 作者: Y. Miyoshi;A. Morioka;R. Kataoka;Y. Kasahara;T. Mukai

Study on the Onboard Software for the MMO-PWI Instruments

MMO-PWI仪器机载软件研究

• 发表时间: 2006
• 作者: R. Enomoto;Y. Izue;Y. Yamashita;T. Ono;A. Kumamoto;Y. Kasahara;後藤 由貴;T. Ono;A. Kumamoto;Y. Goto;Y. Kasahara;T. Ono;Y. Miyoshi;Y. Miyoshi;Y. Miyoshi;長野 勇;井町 智彦;後藤 由貴;B. Tsurutani;K. Shiokawa;H. Matsumoto;I. Nagano;T. Imachi;Y. Goto;B. Tsurutani;K. Shiokava;B.Tsurutani;K.Shiokawa;越山 祐一;中嶋 充;長野 勇;Y.Kasahara;Y.Kasahara;Y.Goto;Y.Goto;R.Higashi;Y. Kasahara;Y. kasahara;Y. Kasahara;Y. Goto;Y. Goto;Y. Goto;Y. Kasahara;A. Kumamoto;Y. Kasahara;A. Kumamoto;Y. Kasahara;A. Kumamoto;Y. Kasahara;Y. Kasahara;S. Yamawaki
• 通讯作者: S. Yamawaki

Plasma wave observation using waveform capture in the Lunar Radar Sounder on board the SELENE spacecraft

• DOI: 10.1186/bf03352799
• 发表时间: 2008-04
• 期刊: Earth, Planets and Space
• 作者: Y. Kasahara;Y. Goto;K. Hashimoto;T. Imachi;A. Kumamoto;T. Ono;H. Matsumoto

レオメトリ実験による科学衛星搭載ワイヤアンテナの低周波特性解析

使用流变实验分析科学卫星上安装的线天线的低频特性

• 发表时间: 2006
• 期刊: 電子情報通信学会論文誌 J89-B(4)
• 作者: R. Enomoto;Y. Izue;Y. Yamashita;T. Ono;A. Kumamoto;Y. Kasahara;後藤 由貴;T. Ono;A. Kumamoto;Y. Goto;Y. Kasahara;T. Ono;Y. Miyoshi;Y. Miyoshi;Y. Miyoshi;長野 勇;井町 智彦
• 通讯作者: 井町 智彦

Study on Dispersion Characteristics of Lightning Whistlers

闪电哨声的色散特性研究

• 发表时间: 2005
• 期刊: Proc.28th General Assembly of URSI
• 作者: R. Enomoto;Y. Izue;Y. Yamashita;T. Ono;A. Kumamoto;Y. Kasahara;後藤 由貴;T. Ono;A. Kumamoto;Y. Goto;Y. Kasahara;T. Ono;Y. Miyoshi;Y. Miyoshi;Y. Miyoshi;長野 勇;井町 智彦;後藤 由貴;B. Tsurutani;K. Shiokawa;H. Matsumoto;I. Nagano;T. Imachi;Y. Goto;B. Tsurutani;K. Shiokava;B.Tsurutani;K.Shiokawa;越山 祐一;中嶋 充;長野 勇;Y.Kasahara;Y.Kasahara
• 通讯作者: Y.Kasahara