巻号一覧
28 巻 (2008)
- 5 号 p. 411-
- 4 号 p. 28_4_x1-
- 3 号 p. 28_3_x1-
- 2 号 p. 28_2_x1-
- 1 号 p. 1-
28 巻, 3 号
選択された号の論文の6件中1～6を表示しています
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巻頭言
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建石 隆太郎2008 年 28 巻 3 号 p. 28_3_x1
発行日: 2008/06/25
公開日: 2009/05/27
ジャーナル フリーPDF形式でダウンロード (116K)
論文
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シュレスタ シャンカー マン, 富澤 良行, 荒井 郁男2008 年 28 巻 3 号 p. 231-245
発行日: 2008/06/25
公開日: 2009/05/27
ジャーナル フリーIn this paper, ground-penetrating radar (GPR), which has the capability to do non-destructive testing (NDT) in civil engineering field, is proposed to detect underground gas pipes, water pipes, electric cables or voids under a road. SFCW (Stepped Frequency Continuous Wave) radar, which is based on vector network analyzer, is utilized for target detection and its performance is investigated. Since signal processing is vital for targets reorganization and clutter rejection, we categories the signal processing method into two phases. In first phase, the numbers of the frequency domain radar data traces underwent CPM (Combined Processing Method) to obtain two dimensional time domain data. In second phase, the two-dimensional time domain data was processed by SAR (Synthetic Aperture Radar) method to obtain the three dimensional image of the pipes. The field experiment was performed on a gravel road with an asphalt layer at a road construction company's test site in Saitama-shi, Japan and all the signal-processing results are presented.抄録全体を表示PDF形式でダウンロード (567K) -
新井 康平2008 年 28 巻 3 号 p. 246-255
発行日: 2008/06/25
公開日: 2009/05/27
ジャーナル フリーA method for the after-launch verification of the linearity of the satellite based visible near-infrared radiometer using two or more earth surfaces where reflection factors differ is proposed. Through the check by experiment were performed and confirmed validity. Moreover, validity of the empirical refractive index for vicarious calibration determined from our four year observation data of the solar direct, diffuse and aureole was checked through a comparison to the vicarious calibration with the directly measured refractive index using solar direct and diffuse irradiance measurement data. As a result of applying the aforementioned empirical aerosol parameters to vicarious calibration of ASTER/VNIR, validity of the empirical aerosol parameters are confirmed for 7.5 years of ASTER/VNIR data. It is also found that linearity of VNIR response (input to output characteristic) is confirmed.抄録全体を表示PDF形式でダウンロード (1165K) -
脇田 英治2008 年 28 巻 3 号 p. 256-264
発行日: 2008/06/25
公開日: 2009/05/27
ジャーナル フリーThis paper proposes a new method to estimate the distribution of farm product fields by analyzing the satellite image. In this study the konjac field is dealt with mainly as the farm product field. However, it is expected that the result of this study is applicable to the other farm products as well as the konjac. The procedure of the land cover classification by the proposed method is as follows.
1) The likelihood values are estimated by using the pixel values of the band 1-3 of the satellite image, the NDVI and the NDCI as the evaluation index.
2) The land cover classification is performed by judging the likelihood values with the standard likelihood value corresponding to the reliability.
The field survey and satellite image photography were executed simultaneously in the region where the farm product fields crowd. The proposed method and the maximum likelihood method were applied to the obtained satellite image, and the classification analysis of the satellite image was executed. It was confirmed that the both method results correspond with the field survey result with a fair degree of precision. It became clear that the proposed method gives more satisfactory result than the maximum likelihood method by comparing the both methods.抄録全体を表示PDF形式でダウンロード (1047K)
小論文
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石黒 聡士, 杉村 俊郎2008 年 28 巻 3 号 p. 265-273
発行日: 2008/06/25
公開日: 2009/05/27
ジャーナル フリーMicrotopography is essential for reconstructing water flows resulting from tsunami events and for estimating the resultant damages. In order to construct the microtopography efficiently, it is essential to (1) develop a high-resolution digital surface model (DSM) of the flooded region on the basis of stereo-pair images and (2) quantify the accuracy of the generated model. However, using the stereo-pairs of aerial photographs may not be feasible because tsunamis generally affect coastal regions to a broader spatial extent. Moreover, in many cases, the archives of stereo-pair satellite images of tsunami-affected areas are not satisfactory because such images are captured only when they are requested.
In this study, we attempt to construct a DSM by using two single images captured by the satellites IKONOS and QuickBird for the Nam Khem plain located along the south-western coastline of Thailand, which was affected by the December 26, 2004, Sumatra-Andaman tsunami. These satellites have different satellite azimuths and elevation angles.
The DSM is generated using the stereo pattern matching algorithm. We experiment with template sizes of 11, 15, 19, and 23 pixels, and from the observation of stereoscopic satellite imagery, it is found that the template size of 19 pixels is the most accurate DSM.
For the DSM of the Nan Khem plain, the root mean square error (RMSE) of the elevation is calculated to be 1.32m.抄録全体を表示PDF形式でダウンロード (1076K)
解説
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祖父江 真一, 荒木 博志, 田澤 誠一, 野田 寛大, 奥村 隼人, 東泉 一郎, 島田 卓也, 比嘉 聡, 小林 江里子2008 年 28 巻 3 号 p. 274-277
発行日: 2008/06/25
公開日: 2009/05/27
ジャーナル フリーPDF形式でダウンロード (323K)
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