巻号一覧
57 巻 (2011)
- 4 号 p. 173-
- 3 号 p. 83-
- 2 号 p. 41-
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57 巻, 4 号
選択された号の論文の5件中1～5を表示しています
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テクニカルレポート
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平岡 喜文, 横川 正憲, 根本 盛行, 村山 盛行, 武山 峰典2010 年 57 巻 4 号 p. 173-180
発行日: 2010年
公開日: 2012/03/30
ジャーナル フリーWe developed a new Remote GPS Monitoring System (REGMOS) -Hybrid which utilized the Broadband Global Area Network (BGAN) of Inmarsat PLC and solar cell modules for data transfer and power supply, respectively. It can equip many kinds of sensors including GPS, camera, thermometer, tiltmeter and so on to monitor volcanoes and crustal activities. The original REGMOS was first developed in 1998. The purpose of the development is to monitor crustal deformation in a severe environment where infrastructures including electric power and wired telephone line is not available, for example, a volcanic field and an area damaged by an earthquake. In the original system, the data transfer using satellite telephone services is unstable and slow (4.8 kbps) and GPS is an only sensor for crustal monitoring. It was pointed out that various kinds of data such a photo of a crater were important to monitor volcanic activities. Therefore, we developed the new REGMOS-Hybrid to overcome the problems of the data communication and power generation in the original system. We installed the REGMOS-Hybrid on the summit of Mt. Tarumae volcano in Hokkaido in August 2010. It has enabled us to monitor the volcanic activity for more than one year without any troubles of the whole system. The other kinds of data including a movie and geomagnetism have been already supported by the REGMOS-Hybrid. We plan to acquire these data in a practical field.抄録全体を表示PDF形式でダウンロード (942K)
［特集：合成開口レーダーの測地学・地球科学研究への応用，その３］
原著論文
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高田 陽一郎, 小林 知勝, 古屋 正人, 村上 亮2010 年 57 巻 4 号 p. 181-193
発行日: 2010年
公開日: 2012/03/30
ジャーナル フリーWe detected post-seismic surface deformation following the 2008 Iwate-Miyagi Nairiku Earthquake (2008 June 14 JST, M6.8) by interferometric synthetic aperture radar (InSAR) analysis using ALOS/PALSAR data. The ascending interferograms indicate ∼8 cm of length increase in radar line-of-sight (LOS) to the east of Mt. Kurikoma (KRK), and decreases in it to the south of KRK and around Mt. Amadamori (AMM). The descending interferograms indicate ~4 cm of length increase in LOS to the east of Mt. Kunimiyama (KNM), and around AMM. We found that a west-dipping high-angle reverse fault roughly explains overall pattern of the length changes in LOS (ΔLOS) to the east of KNM. We demonstrated that ALOS/PALSAR has a strong ability to detect surface deformation lurking in such a vast mountainous area.抄録全体を表示PDF形式でダウンロード (2010K) -
福島 洋, Hooper Andrew2010 年 57 巻 4 号 p. 195-214
発行日: 2010年
公開日: 2012/03/30
ジャーナル フリーIn order to precisely measure the displacement field after the 2004 Niigataken-Chuetsu earthquake, central Japan, we performed a persistent scatterer (PS) interferometry analysis on SAR images acquired by the European satellite ENVISAT. After performing a PS interferometry analysis, we first corrected for artifacts due to orbit inaccuracies and atmospheric phase delay using GPS displacements. This post-processing revealed that the dominant component of the displacements is a seasonal pattern caused by water extraction during winter. Precise estimation of the tectonic component of the displacements, which enables discussion of the order of 1 cm displacements and 1 cm/year velocity, was further obtained by separating out the seasonal component using a principal component analysis. A part of observed signals was consistent with deformations due to afterslips and poroelastic relaxation of the 2004 earthquake. Another part of the signals was consistent with a relative motion of two blocks whose boundary coincides with the Western Nagaoka Plain faults.抄録全体を表示PDF形式でダウンロード (5436K)
報 告
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西村 卓也2010 年 57 巻 4 号 p. 215-216
発行日: 2010年
公開日: 2012/03/30
ジャーナル フリーPDF形式でダウンロード (576K)
書評
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測量用語辞典編集委員会編
出版 東洋書店 初版 2011年7月 393ページ ISBN978-4-88595-984-4中堀 義郎2011 年 57 巻 4 号 p. 217
発行日: 2011年
公開日: 2012/12/13
ジャーナル フリーPDF形式でダウンロード (526K)
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