Koyama Christian KOYAMA CHRISTIAN

Researcher Number	40704961
Other IDs
Affiliation (based on the past Project Information) *help	2020 – 2022: 東京電機大学, 理工学部, 研究員 2016: 東京電機大学, 理工学部, 研究員 2015: 東北大学, 東北アジア研究センター, 産学官連携研究員
Review Section/Research Field	Principal Investigator Measurement engineering Except Principal Investigator Basic Section 40010:Forest science-related
Keywords	Principal Investigator Synthetic aperture radar / Target detection / Radar imaging / Disaster mitigation / Polarimetry / GPR / GB-SAR Except Principal Investigator 環境保護 / リモートセンシング / 人工知能 … More / 地球温暖化 / SAR / 人工衛星 / 森林伐採 / 時系列解析 / 深層学習 / Sentinel-2 / AI / 森林監視 Less

Deforestation monitoring by using satellite-borne SAR
- Principal Investigator
  
  Watanabe Manabu
- Project Period (FY)
  2020 – 2022
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 40010:Forest science-related
- Research Institution
  Tokyo Denki University
Detection of Buried Objects by Synthetic Aperture Radar Imaging for Improved Disaster ResponsePrincipal Investigator
- Principal Investigator
  
  Koyama Christian
- Project Period (FY)
  2015 – 2016
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Measurement engineering
- Research Institution
  Tokyo Denki University
  Tohoku University

All 2021 2020 2017 2016 2015

All Journal Article Presentation

[Journal Article] In-Situ Measurement of Soil Permittivity at Various Depths for the Calibration and Validation of Low-Frequency SAR Soil Moisture Models by using GPR2017
- Author(s)
  Christian Koyama, Hai Liu, Kazunori Takahashi, Masanobu Shimada, Manabu Watanabe, Tseedulum Khuut, Motoyuki Sato
- Journal Title
  
  Remote Sensing
  
  Volume: 9(6) Pages: 511-511
- Peer Reviewed / Acknowledgement Compliant / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K18075
[Journal Article] Development of Multistatic Linear Array Radar at 10-20GHz2017
- Author(s)
  Y. Mori, T. Yumii, Y. Asano, K. Doi, C. Koyama, Y. Iitsuka, K. Takahashi, M. Sato
- Journal Title
  
  IEICE Trans. Electron.
  
  Volume: E100.C Issue: 1 Pages: 60-67
- DOI
  10.1587/transele.E100.C.60
- NAID
  130005188326
- ISSN
  0916-8524, 1745-1353
- Language
  English
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K18075
[Journal Article] Post-earthquake damage inspection of wood-frame buildings using radar polarimetry.2016
- Author(s)
  Hai Liu, Christian Koyama, Jie Cui, Qinghuo Liu and Motoyuki Sato
- Journal Title
  
  Remote Sensing
  
  Volume: 8 Issue: 11 Pages: 935-935
- DOI
  10.3390/rs8110935
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26249058, KAKENHI-PROJECT-15K18075
[Journal Article] Disaster debris estimation using high-resolution polarimetric stereo-SAR2016
- Author(s)
  Koyama, C. N., H. Gokon, M. Jimbo, S. Koshimura, M. Sato
- Journal Title
  
  ISPRS Journal of Photogrammetry and Remote Sensing
  
  Volume: 120 Pages: 84-98
- DOI
  10.1016/j.isprsjprs.2016.08.003
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-25242035, KAKENHI-PROJECT-26249058, KAKENHI-PROJECT-15K18075
[Journal Article] Case studies of GPR surveys for the rehabilitation after the Great East Japan Earthquake 20112016
- Author(s)
  K. Takahashi, H. Liu, C. N. Koyama, T. Komagino, M. Sato
- Journal Title
  
  BUTSURI-TANSA(Geophysical Exploration)
  
  Volume: 69 Issue: 3 Pages: 185-194
- DOI
  10.3124/segj.69.185
- NAID
  130005397163
- ISSN
  0912-7984, 1881-4824
- Language
  Japanese
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-15K18075
[Journal Article] ACCURACY OF DEPOSIT STRUCTURE AFTER TSUNAMI OBTAINED BY GPR2016
- Author(s)
  M. Takamura, K. Takahashi, C. N. Koyama, K. Udo, M. Sato
- Journal Title
  
  Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
  
  Volume: 72 Issue: 2 Pages: I_37-I_42
- DOI
  10.2208/kaigan.72.I_37
- NAID
  130005282376
- ISSN
  1883-8944, 1884-2399
- Language
  Japanese
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-15K18075
[Journal Article] Near range polarimetric SAR for non-destructive inspection of wooden buildings2015
- Author(s)
  Motoyuki Sato, Kazunori Takahashi, Yasushi Iitsuka, Christian Koyama
- Journal Title
  
  Proc. of 2015 Asia-Pacific Conference on Synthetic Aperture Radar
  
  Volume: 35 Pages: 306-309
- DOI
  10.1109/apsar.2015.7306214
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-15K18075
[Journal Article] Development of a biomass corrected soil moisture retrieval model for dual-polarization ALOS-2 data based on ALOS/PALSAR and PI-SAR-L2 observations2015
- Author(s)
  Christian Koyama, Karl Schneider, Motoyuki Sato
- Journal Title
  
  Proc. of IGARSS 2015
  
  Volume: 35 Pages: 1316-1319
- DOI
  10.1109/igarss.2015.7326017
- Peer Reviewed / Acknowledgement Compliant / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K18075
[Journal Article] Detection and Classification of Subsurface Objects by Polarimetric Radar Imaging2015
- Author(s)
  Christian Koyama, Motoyuki Sato
- Journal Title
  
  Proc. of IEEE Radar Conference 2015
  
  Volume: 1 Pages: 412-419
- DOI
  10.1109/radarconf.2015.7411924
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-15K18075
[Journal Article] Spatio-temporal soil moisture patterns - A meta-analysis using plot to catchment scale data2015
- Author(s)
  Wolfgang Korres, Tim Reichenau, Peter Fiener, Christian Koyama
- Journal Title
  
  Journal of Hydrolgogy
  
  Volume: 520 Pages: 326-341
- DOI
  10.1016/j.jhydrol.2014.11.042
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K18075
[Journal Article] Full Polarimetric UWB GB-SAR for Damage Assessment of Wooden Building Structures2015
- Author(s)
  Christian Koyama, Yasushi Iitsuka, Kazunori Takahashi, Motoyuki Sato
- Journal Title
  
  Proc. of IGARSS 2015
  
  Volume: 35 Pages: 2719-2722
- DOI
  10.1109/igarss.2015.7326375
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-15K18075
[Presentation] 深層学習とPALSAR-2時系列データ用いた埼玉県での森林変化検出2021
- Author(s)
  渡邉　学, クリスティアン　コヤマ, 島田　政信
- Organizer
  第 71回 (令和3年度秋季) リモートセンシング学会
- Data Source
  KAKENHI-PROJECT-20K06149
[Presentation] SEASONAL CHANGE ANALYSIS FOR ALOS-2 PALSAR-2 DEFORESTATION DETECTION2020
- Author(s)
  Izumi Nagatani, Masato Hayashi, Manabu Watanabe, Takeo Tadano, Tomohiro Watanabe, Christian Koyama, Masanobu Shimada
- Organizer
  2020 IEEE International Geoscience & Remote Sensing Symposium
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K06149
[Presentation] Trial of deforestation detection accuracies improvement for JJ-FAST algorithm by using deep learning.2020
- Author(s)
  Manabu Watanabe, Christian Koyama, Masato Hayashi, Izumi Nagatani, Takeo Tadono, Masanobu Shimada
- Organizer
  JpGU
- Data Source
  KAKENHI-PROJECT-20K06149
[Presentation] Trial of Deforestation detection by using 25m resolution PALSAR-2/ScanSAR data2020
- Author(s)
  Manabu Watanabe, Christian Koyama, Masato Hayashi, Izumi Nagatani, Takeo Tadono, Masanobu Shimada
- Organizer
  2020 IEEE International Geoscience & Remote Sensing Symposium
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K06149
[Presentation] RAINFALL-INDUCED CHANGES IN L-BAND BACKSCATTER OVER TROPICAL FORESTS AND THEIR IMPACT ON DEFORESTATION MONITORING2020
- Author(s)
  Christian Koyama, Manabu Watanabe, Masato Hayashi, Izumi Nagatani, Takeo Tadono and Masanobu Shimada
- Organizer
  2020 IEEE International Geoscience & Remote Sensing Symposium
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K06149
[Presentation] 深層学習を用いたJJ-FAST伐採検出アルゴリズム検出精度向上の試み2020
- Author(s)
  渡邉　学, クリスティアン　コヤマ, 林　真智　永谷　泉, 田殿　武雄, 島田　政信
- Organizer
  第 69回 (令和2年度秋季) リモートセンシング学会
- Data Source
  KAKENHI-PROJECT-20K06149
[Presentation] Summary of Pi-SAR-L2 Experiments in Sendai2017
- Author(s)
  C. Koyama, M. Sato
- Organizer
  JAXA Pi-SAR-L2 PI Workshop
- Place of Presentation
  Tokyo, Japan
- Year and Date
  2017-02-25
- Data Source
  KAKENHI-PROJECT-15K18075
[Presentation] Quantitative Parameter Estimation using Ground-based, Airborne and Spaceborne Low Frequency Polarimetric Synthetic Aperture Radar2016
- Author(s)
  C. Koyama, M. Sato, M. Shimada
- Organizer
  AGU Fall Meeting 2016
- Place of Presentation
  San Francisco, CA, USA
- Year and Date
  2016-12-12
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K18075
[Presentation] n situ measurement of soil permittivity for calibration and validation of low-frequency SAR soil moisture algorithms by using GPR2016
- Author(s)
  C. Koyama, M. Watanabe, M. Sato, K. Schneider, M. Shimada
- Organizer
  CEOS SAR Calibration and Validation Workshop 2016
- Place of Presentation
  Tokyo, japan
- Year and Date
  2016-09-07
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K18075
[Presentation] Fundamental study on soil moisture variations under vegetation influencing L-band SAR backscatter - implementations for the development of an advanced forest monitoring system2016
- Author(s)
  C. Koyama, M. Watanabe, M. Sato, K. Schneider, M. Shimada
- Organizer
  61th Autumn Conference of the Remote Sensing Society of Japan
- Place of Presentation
  Niigata, Japan
- Year and Date
  2016-11-01
- Data Source
  KAKENHI-PROJECT-15K18075
[Presentation] The effect of the polarization rotation angle in understanding polarimetric SAR data for land cover classification2015
- Author(s)
  Amila Karunathilake, Christian Koyama, Motoyuki Sato
- Organizer
  2015 IEICE Society Conference
- Place of Presentation
  Tohoku University, Aoba-ku, Sendai, Japan
- Year and Date
  2015-09-08
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K18075
[Presentation] Monitoring of soil moisture dynamics from very high-resolution ALOS-2 data2015
- Author(s)
  Christian Koyama
- Organizer
  2nd ALOS-2 PI Workshop
- Place of Presentation
  Akihabara Convention Hall, Chiyoda-ku, Tokyo, Japan
- Year and Date
  2015-11-18
- Data Source
  KAKENHI-PROJECT-15K18075
[Presentation] Application of Polarimetry and Interferometry SAR for understanding of natural disaster affected areas2015
- Author(s)
  Christian Koyama, Motoyuki Sato
- Organizer
  第3回Pi-SAR2 PI会議
- Place of Presentation
  Kojimachi Building, Chiyoda-ku, Tokyo, Japan
- Year and Date
  2015-08-14
- Data Source
  KAKENHI-PROJECT-15K18075
[Presentation] Robust quantitative parameter estimation by advanced CMP measurements for vadose zone hydrological studies2015
- Author(s)
  Christian Koyama, Huang Wang, Tseedulum Khuut, Takyuki Kawai, Motoyuki Sato
- Organizer
  AGU 2015
- Place of Presentation
  San Francisco, USA
- Year and Date
  2015-12-14
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-15K18075

1. Watanabe Manabu (10371147)

# of Collaborated Projects: 1 results

# of Collaborated Products: 6 results
2. 島田政信 (90358721)

# of Collaborated Projects: 1 results

# of Collaborated Products: 6 results
3. 佐藤源之

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
4. 越村俊一

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
5. 佐藤翔輔

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results

Koyama Christian KOYAMA CHRISTIAN

Research Projects

Research Products

Co-Researchers

Deforestation monitoring by using satellite-borne SAR

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Detection of Buried Objects by Synthetic Aperture Radar Imaging for Improved Disaster ResponsePrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

[Journal Article] In-Situ Measurement of Soil Permittivity at Various Depths for the Calibration and Validation of Low-Frequency SAR Soil Moisture Models by using GPR2017

Author(s)

Journal Title

Data Source

[Journal Article] Development of Multistatic Linear Array Radar at 10-20GHz2017

Author(s)

Journal Title

DOI

NAID

ISSN

Language

Data Source

[Journal Article] Post-earthquake damage inspection of wood-frame buildings using radar polarimetry.2016

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Disaster debris estimation using high-resolution polarimetric stereo-SAR2016

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Case studies of GPR surveys for the rehabilitation after the Great East Japan Earthquake 20112016

Author(s)

Journal Title

DOI

NAID

ISSN

Language

Data Source

[Journal Article] ACCURACY OF DEPOSIT STRUCTURE AFTER TSUNAMI OBTAINED BY GPR2016

Author(s)

Journal Title

DOI

NAID

ISSN

Language

Data Source

[Journal Article] Near range polarimetric SAR for non-destructive inspection of wooden buildings2015

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Development of a biomass corrected soil moisture retrieval model for dual-polarization ALOS-2 data based on ALOS/PALSAR and PI-SAR-L2 observations2015

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Detection and Classification of Subsurface Objects by Polarimetric Radar Imaging2015

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Spatio-temporal soil moisture patterns - A meta-analysis using plot to catchment scale data2015

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Full Polarimetric UWB GB-SAR for Damage Assessment of Wooden Building Structures2015

Author(s)

Journal Title

DOI

Data Source

[Presentation] 深層学習とPALSAR-2時系列データ用いた埼玉県での森林変化検出2021