著者

酒井 哲 内野 修 森野 勇 永井 智広 赤穂 大河 川崎 健 奥村 浩 新井 康平 内山 明博 山崎 明宏 松永 恒雄 横田 達也

出版者

社団法人 日本リモートセンシング学会

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.34, no.3, pp.197-204, 2014-07-04 (Released:2015-01-27)

参考文献数

15

被引用文献数

2

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Volcanic ash particles originating from the eruptions of Mt. Sakurajima (31.59°N, 130.66°E) were observed with Mie lidar at an altitude of 1.6-2.3 km over Saga (33.24°N, 130.29°E) on 21 and 22 August, 2013. The lidar data showed a high depolarization ratio (10-15 %) and a moderately low backscatter wavelength exponent (0.6-0.7), indicating the presence of supermicrometer-sized nonspherical particles. The aerosol optical thicknesses at 500 nm derived from the skyradiometer were 0.12 on 21 August (13 : 50 LT) and 0.40 on 22 August (12 : 50 LT). The Ångström exponent was 0.16-0.49 and the single scattering albedo was 0.73-0.91, indicating the predominance of supermicrometer-sized and moderately absorbing particles.

著者

高橋 徹 臼井 敏夫 藤島 豊久 大木 真人 佐野 博昭 小定 弘和

出版者

The Remote Sensing Society of Japan

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.36, no.4, pp.360-366, 2016-09-20 (Released:2017-03-24)

参考文献数

10

被引用文献数

2

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The L-band synthetic aperture radar (SAR) satellite, ALOS-2 (Daichi-2), has a capability for educational purposes. The radar aboard ALOS-2, named PALSAR-2, has a wavelength of 24 cm, compatible with a makeable reflector size for children. In addition, as the spatial resolution of the radar is approximately 3 m, children can easily draw a letter in the radar image by deploying their own reflectors in the schoolyard. We have developed a sufficiently reflective corner reflector (CR) that can be easily built by children. In experiments, we clarified that ALOS-2 can detect reflected waves from a CR with a side length of three times the radar wavelength. We also developed free software that enables children and their educators to analyze most earth observation satellite data including ALOS-2 PALSAR-2 data. In 2014, we established an educational program called “Let's expose ourselves on Daichi-2 data” with the YAC-J (Young Astronauts Club Japan) and EORC (Earth Observation Research Center), JAXA. We have also held seminars for educators in various places in Japan. As a result, more than 20 groups have implemented the program. We conclude that this program enables children and their educators to feel a connection to space and fosters their interest in their native environments.

著者

高久 淳一

出版者

一般社団法人 日本リモートセンシング学会

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.43, no.2, pp.97-106, 2023-05-10 (Released:2023-06-22)

参考文献数

42

著者

田殿 武雄

出版者

一般社団法人 日本リモートセンシング学会

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.41, no.2, pp.258-263, 2021-05-15 (Released:2021-08-25)

参考文献数

26

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This paper provides an overview and discusses the significance of Advanced Land Observing Satellites (ALOS). Japanese Earth observation programs originally consisted of two branches: the Marine Observing Satellite (MOS) for global observation and the Land Observing Satellite (LOS) for more detailed observation. The first LOS mission was conducted by the Japanese Earth Resources Satellite-1 (JERS-1) from 1992 to 1996. It was followed by the Advanced Land Observing Satellite (ALOS, “Daichi”) from 2006 to 2011. Both achieved global data acquisition with high resolution using L-band Synthetic Aperture Radar (SAR) and optical instruments. ALOS-2, a successor of the SAR mission on ALOS, has been operating very well since 2014, and ALOS-3 and ALOS-4 are now being developed for launch in Japanese fiscal years (JFYs) 2021 and 2022 to follow the optical mission and ALOS-2, respectively. In this paper, I examine the history and future of the ALOS series.

著者

嶌田 将貴 竹内 渉

出版者

一般社団法人 日本リモートセンシング学会

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.42, no.1, pp.51-62, 2022-02-10 (Released:2022-04-26)

参考文献数

26

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Due to the strong demand for renewable energy resources, the number of newly built photovoltaic cells has increased dramatically. However, these photovoltaic cells are sometimes subject to disasters such as floods and mudflow. To keep such facilities safe from disasters, a method that can monitor the locations and extent of photovoltaic cells in hazardous zones in cost-effective and less time-consuming ways is necessary. In this study, we developed a multi-temporal and multi-source machine -learning-based method for photovoltaic cell detection . The Sentinel-1 and Sentinel-2 datasets were used as data sources, and the random -forest classification method was applied to classify the land use and land cover (LULC) of the study area. Various combinations of inputs to the classifier were compared based on their performance of the LULC classification. After this process, the combination of optical -data, coherence -data, and the average of the coherence -data was selected as the best classification method. The photovoltaic cell detection process was carried out by combining the multi-temporal classification results to improve detection accuracy. This photovoltaic cell detection method achieved high -overall accuracy, high user accuracy, and a high-kappa coefficient.

著者

大内 和夫

出版者

The Remote Sensing Society of Japan

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.36, no.5, pp.577-583, 2016-11-28 (Released:2017-05-26)

参考文献数

43

著者

井上 吉雄

出版者

一般社団法人 日本リモートセンシング学会

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.37, no.3, pp.213-223, 2017-07-21 (Released:2018-01-31)

参考文献数

25

被引用文献数

11

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Satellite-based remote sensing would provide useful geo-information for the information-based agricultural management (Smart Agriculture). This paper reviews the background and information needs for smart agriculture as well as the necessary sensor specifications and algorithms for application of high-resolution satellites to smart agriculture. The generalized spectral index approach based on hyperspectral data can be used to determine optimal algorithms for prediction of plant and soil variables. This approach would be useful to enhance the applicability of optical satellite sensors that have different waveband specifications. The efficient use of high-resolution satellite sensors would strongly support the diagnostics and decision making in smart agriculture at regional scales.

著者

出村 裕英

出版者

一般社団法人 日本リモートセンシング学会

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.39, no.3, pp.250-252, 2019-07-20 (Released:2020-01-20)

参考文献数

12

著者

細谷 和範 菊川 浩行

出版者

The Remote Sensing Society of Japan

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.25, no.5, pp.443-458, 2005-11-15 (Released:2009-05-22)

参考文献数

9

被引用文献数

1

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The intermittent warm ocean water intrusion into Kagoshima bay is well known as Kyucho phenomenon. We first visualize these phenomena in winter using the satellite thermal infrared images and examine some specifications, especially the distribution patterns, of the intrusion. Then the numerical analysis using a multi-leveled finite difference method is performed for the purpose to investigate the phenomena. It is found from the numerical analysis : (1) The intrusion occurs when the warm water comes into touch with the bay water at the mouth of the bay. (2) The calculated velocity of the warm water intrusion is the same order to the ones estimated by the satellite images. (3) The role of the initial velocity is to increase the intrusion speed. (4) The intrusion speed also increases with the temperature and the thickness of the ocean water. (5) The sea surface wind changes the warm water distribution pattern in the bay. The effects of the warm water contact period at the mouth of the bay and the two successive intrusions are also investigated.

著者

真鍋 淑郎

出版者

The Remote Sensing Society of Japan

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.21, no.4, pp.366-372, 2001-09-28 (Released:2009-05-22)

参考文献数

10

被引用文献数

1

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大気・海洋結合モデルの数値実験によると,21世紀末ころには地表の全球平均気温は現在より2~3℃程度上がる。昇温は,陸面で更に大きくなると予測される。また,半乾燥地帯の土壌水分が減少し,砂漠が拡張しそうである。二酸化炭素などを規制せずに放出し続ければ,数百年先に大気の二酸化炭素濃度が,今の4倍位になり,非常に大きな気候の変化がおこる可能性が大きい。これからは,温暖化に伴う全球的変化の検出,放射強制力を持っ温室効果ガス,エアロゾル等の分布決定,モデルに組み込まれた色々な素過程の検証等にRemote Sensingが増々重要になるであろう。

著者

富谷 光良 石黒 洋行 中島 康裕 豊田 弘道

出版者

The Remote Sensing Society of Japan

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.15, no.3, pp.232-241, 1995-06-30 (Released:2009-05-22)

参考文献数

9

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The computer graphical method for analysis of remote sensing multi-spectral image data is proposed. Three-dimensional histogram is constructed in three-dimensional feature space from the image data and represented by three-dimensional computer graphics. On the histogram fine structure of distribution of data in the feature space can be observed. Therefore the categories of remote sensing multi-spectral image data can be identified easily on the computer screen. Each distribution of water, vegetation and soil etc. has its charasteristic features in the histogram. One of the most distinguished features is that distribution of data of each category is long and narrow, and the principle component axes of the categories concentrate on a point near the origin of the feature space.

著者

林田 佐智子

出版者

一般社団法人 日本リモートセンシング学会

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.41, no.5, pp.611-614, 2021-11-20 (Released:2022-02-01)

参考文献数

21

著者

小林 秀樹 松永 恒雄 梅干 野晁

出版者

The Remote Sensing Society of Japan

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.22, no.5, pp.612-624, 2002-12-31 (Released:2009-05-22)

参考文献数

31

被引用文献数

2

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本研究では,まずTOMS/PAR法の基礎検討により,Ruvに対するRsの影響と,標高の変化に伴うPARclearの変化が無視できないことを指摘し,改良TOMS/PAR法を提案した。また,TOMS/PAR法と改良TOMS/PAR法でのPAR推定精度の違いを気象庁の観測値を用いて検証し,後者の場合,より妥当なPAR推定値が得られる事が確認できた。さらにMODISのFPARプロダクトとTOMS/PAR法及び改良TOMS/PAR法によるPAR推定値を用いてAPARを算出し,APAR推定誤差がNPP推定誤差に与える影響を評価した。その結果,ランダム誤差は最大で年間NPPの4%程度,バイアス誤差が4-6%(MODIS/FPAR+改良TOMS/PAR法),8-9%(MODIS/FPAR+TOMS/PAR法)であった。これらの検討から,TOMS/PAR法,改良TOMS/PAR法ともに,既往研究における年間NPPのモデル間のCVよりは小さく,現在のAPAR推定値は全球NPP推定値の算出に対して十分な精度を持っていることが示された。しかし,年間NPPの全球推定にあたって,不確実性を低減させるためには,様々な地表面の紫外線反射率の影響を受けにくい改良TOMS/PAR法を用いた方がより信頼できる値を得られる。

著者

本田 謙一 田口 智大 室井 翔太 佐藤 匠 佐藤 史崇 小口 貴雄

出版者

一般社団法人 日本リモートセンシング学会

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.42, no.3, pp.185-189, 2022-08-10 (Released:2022-11-26)

参考文献数

6

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In this paper, an example of displacement monitoring of landslides using interferometric SAR analysis is reported. The displacement of the mountain landslides was separated into vertical displacement and east-west displacement by 2.5-dimensional analysis using ALOS-2 with multi-temporal and multi-orbital data. The direction and the boundary of displacement were consistent with the results of displacement measured by airborne laser profiler between 4 years and also with the field survey.

著者

大山 博史 松永 恒雄

出版者

一般社団法人 日本リモートセンシング学会

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.39, no.1, pp.61-67, 2019-02-28 (Released:2019-08-01)

参考文献数

18

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We describe past, ongoing, and planned space-based instruments with the capability to observe the column abundance of greenhouse gases such as carbon dioxide (CO2) and methane (CH4). The key features of the satellite and spectral instruments are concisely summarized.

著者

田中 修三

出版者

The Remote Sensing Society of Japan

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.12, no.2, pp.157-167, 1992-06-30 (Released:2009-05-22)

参考文献数

9

---

What is the horseshoe-shaped topographies in Kawashima-cho Hiki-gun seen on Landsat image? That is the origin of this study. This study is a good example that satellite remote sensing technoligy could have a potential to survey the large scale ruins of ancient river channel.This report describes the formation and valuation of the geographical characteristics in Kawashima-cho Saitama which are investigated by image analysis, surveying the literature, principal component analysis and numerical simulation of overland flood model.The results of this study are summarized as fol-lows :1) The horeseshoe-shaped topographies are natural embankment which closely relate to the Arak-awa river channel of ancient times. In the present, these are used for road, field and residential area.2) Principal component analysis using material datum of rainfall on and affter Meiji period indicate that amount of rainfall in upper stream from Yorii of The Arakawa river control the amount of flood damage in Kawashima-cho. Consequently, a. change of the Arakawa river channel in period Edo guided the amount of rainfall which determined flooded area and brought increasing of flood damage in Kawashima-cho. So it is necessary to give careful consideration to the design of improvement for river channel.3) The result of numerical simulation of overland flood flow shows the horseshoe-shaped topographies work as embankmet against flood flow and lighten the flood damage. The natural embankmeent in seen on Landsat image defended residential and farm area against the overland flood flow of small scale.

著者

田中 總太郎 杉村 俊郎 原田 知幸 田中 美枝子

出版者

The Remote Sensing Society of Japan

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.11, no.3, pp.529-537, 1991-09-30 (Released:2009-05-22)

参考文献数

8

著者

富谷 光良 石黒 洋行 中島 康裕 山口 基貴 豊田 弘道

出版者

The Remote Sensing Society of Japan

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.15, no.4, pp.326-337, 1995-09-30 (Released:2009-05-22)

参考文献数

8

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The linear algebraic analysis of remotely sensed multispectral image is studied. The inner product is applied to the classification and the outer product to systematic treatment of mixels. The analysis uses essentially angular distribution of data with respect to the origin of feature space. The offsets which are involved in the data are estimated by the 3-dimensional histogram and subtracted from the data. Then the fact that pixels have the same angle in the feature space strongly implies that they have the same reflectances and belong to the same category. Therefore the angles of data is the most important information to classify the categories.

著者

熊谷 直喜 山野 博哉 サンゴマップ実行委員会

出版者

一般社団法人 日本リモートセンシング学会

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.38, no.2, pp.95-98, 2018-04-20 (Released:2018-10-28)

参考文献数

21

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Coral reefs are threatened ecosystems, with global and local stressors such as excessive sea-surface temperature contributing to their decline. We review what kind of stressors can have an impact on coral bleaching and how open data can be utilized in predicting model of coral bleaching for local and regional reef management.

著者

原 香実 リュウ ウェン 山崎 文雄

出版者

社団法人 日本リモートセンシング学会

雑誌

日本リモートセンシング学会誌 (ISSN:02897911)

巻号頁・発行日

vol.36, no.4, pp.338-347, 2016-09-20 (Released:2017-03-24)

参考文献数

25

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Synthetic Aperture Radar (SAR) is a very useful tool for detecting surface changes and deformation caused by volcano activities because of its independence from weather and daylight conditions. A volcano in Kuchinoerabu Island, Kagoshima, Japan, erupted explosively and pyroclastic flows reached the coastal area on May 29, 2015. In this study, ALOS-2 PALSAR-2 data were used to analyze surface changes and deformations associated with the eruptive activity. The pyroclastic flows around the Shindake crater were observed by the differences of backscattering coefficients and the coherence values. Changed areas were extracted by a threshold value of the coherence, and were compared with a visual interpretation result conducted by the Geospatial Information Authority of Japan (GSI). The ground deformation due to the eruption was detected by the interferometric analysis, and its vertical component was estimated by combining the results from two InSAR pairs.