岡田 敏美 OKADA Toshimi

ID:1000090008566

富山県立大学工学部 Faculty of Engineering, Toyama Prefectural University (2013年 CiNii収録論文より)

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Articles:  1-20 of 75

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  • Development of MRLS (Mountaineer's Radio Locating Sysytem)  [in Japanese]

    OKADA Toshimi

    Technical report of IEICE. CQ 113(208), 59, 2013-09-05

  • Development of MRLS (Mountaineer's Radio Locating Sysytem)  [in Japanese]

    OKADA Toshimi

    IEICE technical report. MoNA, Mobile network and applications 113(209), 29, 2013-09-05

  • Development of MRLS (Mountaineer's Radio Locating System)  [in Japanese]

    Toshimi Okada

    The MRLS (Mountaineer's Radio Locating System) is the device to search and locate the point of causalities, who are lost their ways as well as in the distress by the snow avalanche. The mountaineer br …

    IPSJ SIG Notes 2013-EIP-61(16), 1-1, 2013-09-04

    IPSJ 

  • Development of MRLS (Mountaineer's Radio Locating System)  [in Japanese]

    Toshimi Okada

    The MRLS (Mountaineer's Radio Locating System) is the device to search and locate the point of causalities, who are lost their ways as well as in the distress by the snow avalanche. The mountaineer br …

    IPSJ SIG Notes 2013-GN-89(16), 1-1, 2013-09-04

    IPSJ 

  • Development of MRLS (Mountaineer's Radio Locating System)  [in Japanese]

    Toshimi Okada

    The MRLS (Mountaineer's Radio Locating System) is the device to search and locate the point of causalities, who are lost their ways as well as in the distress by the snow avalanche. The mountaineer br …

    IPSJ SIG Notes 2013-DPS-156(16), 1-1, 2013-09-04

    IPSJ 

  • Observation of Magnetospheric Plasma Waves in wide Frequencies by Probe-system on board spacecraft  [in Japanese]

    OKADA Toshimi

    電気学会研究会資料. EMT, 電磁界理論研究会 2011(128), 69-81, 2011-11-17

    References (42)

  • Development of Auto-Detection Method of Lower Cut-Off Frequency in Magnetospheric Plasma Wave Spectrum  [in Japanese]

    SHIRAISHI Takafumi , ISHISAKA Keigo , MIYAKE Taketoshi , OKADA Toshimi , MURATA Takeshi

    Geotail衛星で観測されたCR(Continuum Radiation)と呼ばれるプラズマ波動の低域カットオフ周波数(f_<cut>)は,衛星周辺プラズマの電子密度推定に用いられている.これまで,f_<cut>の検出は目視によって行われており,大量のデータ収集には多くの時間を要していた.そのためf_<cut>の自動検出法の開発が試みられたが,一般的な画像処理 …

    The IEICE transactions on communications B 92(4), 794-802, 2009-04-01

    References (7)

  • Separated Observation of Propagation Modes of MF Radio Wave in the Lower Ionosphere by S-310-37 Rocket  [in Japanese]

    ASHIHARA Yuki , ISHISAKA Keigo , MIYAKE Taketoshi , OKADA Toshimi

    2007年1月16日午前11時20分,S-310-37号機ロケットが内之浦宇宙空間観測所より打ち上げられた.我々は,下部電離圏の電子密度を推定することを目的として,NHK熊本第2放送(873kHz)を観測するロケット搭載用電波受信器を開発した.S-310-37号機ロケット及び電波受信器は予定どおり動作し,下部電離圏を伝搬する電波の伝搬特性を取得した.本論文では,観測した波形データを周波数解析するこ …

    The IEICE transactions on communications B 91(5), 636-639, 2008-05-01

    References (6)

  • Development of electric field and MF radio wave instrument onboard the sounding rocket  [in Japanese]

    ISHISAKA Keigo , ASHIHARA Yuki , MIYAKE Taketoshi , OKADA Toshimi

    The sharp hot electron layer was found to appear at the height from 105km to 11km at around 11 hours in local time in winter. The S-310-37 sounding rocket experiments will be carried out at Uchinoura …

    Bulletin of Toyama Prefectural University 17, 70-77, 2007-03

  • Development of EMC measurement method against instruments onboard spacecraft with FDTD simulations  [in Japanese]

    Miyake Taketoshi , Okada Toshimi , Ishisaka Keigo

    We developed a measurement method of EMC requirement against instruments onboard spacecraft with FDTD simulations. Since the magnetized space plasma is a medium with dipersibility as well as anisotrop …

    Bulletin of Toyama Prefectural University 17, 61-69, 2007-03

  • Estimation of Electron Density Profile in the Lower Ionosphere at Winter Nighttime by Rocket Observations of LF and MF Radio Waves  [in Japanese]

    ASHIHARA Yuki , ISHISAKA Keigo , OKADA Toshimi , MIYAKE Taketoshi , MURAYAMA Yasuhiro , NAGANO Isamu

    電離層中を伝搬する電波の強度は,伝搬領域の屈折率及び電子と中性粒子間の衝突回数に依存する.したがって,電離層中を伝搬する電波の強度を観測することによって,逆問題として電子密度の高度分布を推定することができる.本研究では,冬季夜間にロケット搭載長中波電波受信機を用いて,地上から送信される鹿屋航空基地無指向性ビーコン(238kHz)の長波電波,及びNHK熊本第2放送(873kHz)の中波電波の地上電離 …

    The IEICE transactions on communications B 89(10), 2012-2021, 2006-10-01

    References (15) Cited by (1)

  • Propagation Characteristics of Beacon Radio Waves at 400MHz on the Snow-Mounted Ground  [in Japanese]

    ASADA Mineo , OKADA Toshimi

    山岳遭難者の探索システムとして,登山者が携帯する400MHz帯小型発信器(ビーコン)から発信される電波を利用して捜索する方法が提案されている.そこで,遭難時を想定してビーコンを大地付近に設置あるいは積雪中に埋設した場合の伝搬距離と電波の減衰の関係について理論的な検討及び実証実験を行った.その結果,無雪時において400MHz帯ビーコンを地上高約1.7λあるいは0.4λ付近に設置した場合は,大地反射の …

    The IEICE transactions on communications B 89(7), 1318-1324, 2006-07-01

    References (16)

  • ELF/VLF emission observation by Polar Patrol Balloons  [in Japanese]

    Yamagishi Hisao , Miyake Taketoshi , Okada Toshimi , Chino Akihiro , Kadokura Akira , Ebihara Yusuke , Sato Natsuo , Takano Hiroshi

    Circum-Antarctic balloons were launched from Syowa Station by the 44th Japanese Antarctic Research Experiment team in January 2003. Two balloons equipped with identical instruments were flown in forma …

    Antarctic record 50(2), 115-131, 2006-07

    Cited by (1)

  • Study on EM Noises around a Satellite and Their Control Based on FDTD Simulation  [in Japanese]

    OKADA Toshimi , MAEDA Hideki , MIYAKE Taketoshi , ISHISAKA Keigo , HAYAKAWA Hajime , TSURUDA Koichiro

    磁気圏内を飛翔する科学探査衛星には各種のセンサが搭載されており,衛星の内部及び外部の電磁ノイズを低く抑える必要がある.センサの一例として太陽センサがあるが,これは宇宙空間に開口部をもつため,一方では電磁ノイズの発生源と考えられる.本研究では太陽センサからの衛星周辺に放射される電磁ノイズ分布をFDTDシミュレーションを用いて求めた.その結果から導電性フードによるシールド効果を評価し,シールド効果の大 …

    The Transactions of the Institute of Electronics, Information and Communication Engineers B 87(8), 1119-1123, 2004-08-01

    References (6)

  • Development of ELF/VLF Band Wave Receiver Onboard Polar Patrol Balloon  [in Japanese]

    MIYAKE Taketoshi , OKADA Toshimi , YAMAGISHI Hisao , CHINO Akihiro , ISHISAKA Keigo , YAMAGAMI Takamasa

    2003年1月13日,南極昭和基地から2機の南極周回気球PPB(Polar Patrol Balloon)が放球された.これは国立極地研究所が中心となって実施された南極周回気球実験であり,2機の大気球を連続して放球し,地上及びあけぼの衛星との立体的観測を行うことにより,極域の様々な物理現象の空間構造の解明を目的としている.このPPB観測計画には本研究で開発を行ったELF/VLF帯波動観測機(EMW …

    The Transactions of the Institute of Electronics, Information and Communication Engineers B 87(5), 741-745, 2004-05-01

    References (8) Cited by (1)

  • Estimation of Complex Snow Dielectric Constant by Wave Interference Method  [in Japanese]

    ASADA Mineo , OKADA Toshimi , TANINO Katsumi , MIYAKE Taketoshi , ISHISAKA Keigo

    近年,登山者人口の増加とあいまって山岳遭難者数も年々増加する傾向にある.特に,雪崩などの遭難時のように,登山者が雪下に埋もれる場合の捜索が重要である.そこで,山岳遭難救助システムに最適な周波数について積雪による伝搬損から検討するために,電波の干渉法を利用して雪の複素誘電率を推定した.雪の導電率から密度が0.5g/cm^3の湿ったしまり雪について伝搬損を推定した結果,山岳遭難救助システムには500M …

    The Transactions of the Institute of Electronics, Information and Communication Engineers B 87(3), 428-436, 2004-03-01

    References (14) Cited by (2)

  • Propagation characteristics of the EM noises from the solar sensor onboard satellite and its shielding method  [in Japanese]

    OKADA Toshimi , MAEDA Hideki , MIYAKE Taketoshi , ISHISAKA Keigo , HAYAKAWA Hajime , TSURUDA Koichiro

    電気学会研究会資料. EMC, 電磁環境研究会 2004(5), 115-118, 2004-01-20

    References (4)

  • Propagation characteristics of the EM noises from the solar sensor onboard satellite and its shielding method  [in Japanese]

    OKADA Toshimi , MAEDA Hideki , MIYAKE Taketoshi , ISHISAKA Keigo , HAYAKAWA Hajime , TSURUDA Koichiro

    The electromagnetic noises emitted from the solar sensor electronics onboard NOZOMI spacecraft are calculated by FDTD method and the spatial distributions of noise intensity outside spacecraft are obt …

    IEICE technical report. Electromagnetic compatibility 103(564), 115-118, 2004-01-13

    References (4) Cited by (1)

  • Location System of Victims in the Mountains by the Radio Direction-Finder onboard Helicopter  [in Japanese]

    OKADA Toshimi , ASADA Mineo , MORIMOTO Katsuhide , MAEDA Koukichi , TAKAGI Kenji , ASHIHARA Yu-ki , NAKAGAWA Yasunari , MIYAKE Taketoshi , ISHISAKA Keigo

    In order to locate the position of victims i the mountains such as the snow avalanche, we have been developing a location system using a radio direction-finder onboard helicopter, supposing that the c …

    Technical report of IEICE. SST 102(668), 1-8, 2003-03-05

  • Location System of Victims in the Mountains by the Radio Direction-Finder onboard Helicopter  [in Japanese]

    OKADA Toshimi , ASADA Mineo , MORIMOTO Katsuhide , MAEDA Koukichi , TAKAGI Kenji , ASHIHARA Yu-ki , NAKAGAWA Yasunari , MIYAKE Taketoshi , ISHISAKA Keigo

    In order to locate the position of victims in the mountains such as the snow avalanche, we have been developing a location system using a radio direction-finder onboard helicopter, supposing that the …

    Technical report of IEICE. RCS 102(674), 1-8, 2003-02-26

    References (5)

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