The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
대규모 먼지 폭풍 동안 화성 대기의 방전에서 방출되는 전파 잡음, 즉 화성 대기의 검출 가능성에 대한 타당성 조사가 이루어졌습니다. 1998년 발사된 우주선 노조미(NOZOMI)는 근지점 150~200km의 화성 주위 타원 궤도에 배치될 예정이다. 온보드 장비 LFA(저주파 플라즈마파 분석기)에는 10Hz~32kHz의 주파수 범위에서 저주파 플라즈마파를 측정하는 기능이 있습니다. LFA가 대기의 전파잡음을 감지할 수 있는지 알아보기 위해 전파법을 이용하여 화성 전리층을 통과하는 전자기파의 전파 특성을 이론적으로 연구합니다. 전리층은 Mars Global Surveyor 우주선의 최근 자기 이상 관측과 Viking 관측의 대기 구성 요소 및 전자 밀도를 기반으로 자기 이온 매체로 모델링되었습니다. 우리의 계산에 따르면 200헤르츠 미만의 주파수의 파동은 낮은 감쇠로 전파될 수 있으며 낮 전리층의 자기 이상이 있는 지역의 휘슬러 모드에서 30km 이상의 고도에 도달할 수 있습니다. 강렬한 먼지 폭풍 속에서 방전으로 인해 방출되는 무선 잡음의 강도가 -XNUMXdBV/m/m 이상인 것으로 나타났습니다.
Toshimi OKADA
Satoshi YAGITANI
Isamu NAGANO
Tomohiko IMACHI
Misaki MUKAINO
Yasumasa KASABA
Hiroshi MATSUMOTO
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부
Toshimi OKADA, Satoshi YAGITANI, Isamu NAGANO, Tomohiko IMACHI, Misaki MUKAINO, Yasumasa KASABA, Hiroshi MATSUMOTO, "Propagation Characteristics of ELF/VLF Electromagnetic Waves in the Martian Ionosphere and the Possibility for Detection of Martian Atmospherics by NOZOMI Observations" in IEICE TRANSACTIONS on Communications,
vol. E84-B, no. 3, pp. 653-659, March 2001, doi: .
Abstract: A feasibility study has been made of the detection possibility of radio wave noises, i.e., Martian atmospherics, emitted from discharges in the Martian atmosphere during large dust storms. The spacecraft NOZOMI, which was launched in 1998, is to be placed on an elliptic orbit around Mars with perigee of 150-200 km. An onboard-equipment LFA (Low Frequency Plasma wave Analyzer) has capability to measure the low frequency plasma waves in the frequency range from 10 Hz to 32 kHz. In order to know if the LFA can detect the atmospheric radio noises, the propagation characteristics of electromagnetic waves through the Martian ionosphere are studied theoretically by using a full-wave method. The ionosphere is modeled as a magneto-ionic medium based on the recent observations of magnetic anomaly by Mars Global Surveyor spacecraft, and the atmospheric constituent and electron density by Viking observations. Our calculation shows that the waves at frequencies less than a hundred hertz can propagate with low attenuation and reach to altitudes above 200 km in the whistler-mode in the regions of magnetic anomalies in the dayside ionosphere. It is shown that the radio noises emitted from electric discharge in an intense dust storm, with the intensity over -30 dBV/m/
URL: https://global.ieice.org/en_transactions/communications/10.1587/e84-b_3_653/_p
부
@ARTICLE{e84-b_3_653,
author={Toshimi OKADA, Satoshi YAGITANI, Isamu NAGANO, Tomohiko IMACHI, Misaki MUKAINO, Yasumasa KASABA, Hiroshi MATSUMOTO, },
journal={IEICE TRANSACTIONS on Communications},
title={Propagation Characteristics of ELF/VLF Electromagnetic Waves in the Martian Ionosphere and the Possibility for Detection of Martian Atmospherics by NOZOMI Observations},
year={2001},
volume={E84-B},
number={3},
pages={653-659},
abstract={A feasibility study has been made of the detection possibility of radio wave noises, i.e., Martian atmospherics, emitted from discharges in the Martian atmosphere during large dust storms. The spacecraft NOZOMI, which was launched in 1998, is to be placed on an elliptic orbit around Mars with perigee of 150-200 km. An onboard-equipment LFA (Low Frequency Plasma wave Analyzer) has capability to measure the low frequency plasma waves in the frequency range from 10 Hz to 32 kHz. In order to know if the LFA can detect the atmospheric radio noises, the propagation characteristics of electromagnetic waves through the Martian ionosphere are studied theoretically by using a full-wave method. The ionosphere is modeled as a magneto-ionic medium based on the recent observations of magnetic anomaly by Mars Global Surveyor spacecraft, and the atmospheric constituent and electron density by Viking observations. Our calculation shows that the waves at frequencies less than a hundred hertz can propagate with low attenuation and reach to altitudes above 200 km in the whistler-mode in the regions of magnetic anomalies in the dayside ionosphere. It is shown that the radio noises emitted from electric discharge in an intense dust storm, with the intensity over -30 dBV/m/
keywords={},
doi={},
ISSN={},
month={March},}
부
TY - JOUR
TI - Propagation Characteristics of ELF/VLF Electromagnetic Waves in the Martian Ionosphere and the Possibility for Detection of Martian Atmospherics by NOZOMI Observations
T2 - IEICE TRANSACTIONS on Communications
SP - 653
EP - 659
AU - Toshimi OKADA
AU - Satoshi YAGITANI
AU - Isamu NAGANO
AU - Tomohiko IMACHI
AU - Misaki MUKAINO
AU - Yasumasa KASABA
AU - Hiroshi MATSUMOTO
PY - 2001
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E84-B
IS - 3
JA - IEICE TRANSACTIONS on Communications
Y1 - March 2001
AB - A feasibility study has been made of the detection possibility of radio wave noises, i.e., Martian atmospherics, emitted from discharges in the Martian atmosphere during large dust storms. The spacecraft NOZOMI, which was launched in 1998, is to be placed on an elliptic orbit around Mars with perigee of 150-200 km. An onboard-equipment LFA (Low Frequency Plasma wave Analyzer) has capability to measure the low frequency plasma waves in the frequency range from 10 Hz to 32 kHz. In order to know if the LFA can detect the atmospheric radio noises, the propagation characteristics of electromagnetic waves through the Martian ionosphere are studied theoretically by using a full-wave method. The ionosphere is modeled as a magneto-ionic medium based on the recent observations of magnetic anomaly by Mars Global Surveyor spacecraft, and the atmospheric constituent and electron density by Viking observations. Our calculation shows that the waves at frequencies less than a hundred hertz can propagate with low attenuation and reach to altitudes above 200 km in the whistler-mode in the regions of magnetic anomalies in the dayside ionosphere. It is shown that the radio noises emitted from electric discharge in an intense dust storm, with the intensity over -30 dBV/m/
ER -