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Josaphat Lab
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The lab observes the Earth and disasters with synthetic aperture radar (SAR) that its members build themselves.
AboutAbout the lab
Seeing the Earth with radar built in-house.
The Josaphat Lab studies the science and technology of microwave remote sensing.
It designs and develops synthetic aperture radar (SAR) to be mounted on unmanned aerial vehicles, aircraft, stratospheric platforms, and small satellites.
Using circularly polarized SAR, polarimetric SAR, interferometric SAR, and tomography, the lab observes the land surface and atmosphere with high accuracy.
The technology is applied to disaster response, environmental monitoring, precision agriculture, forestry, oceans, urban development, and infrastructure health assessment.
Key terms
- Synthetic aperture radar (SAR)
- A system that transmits radio waves and measures the reflections to image the ground surface, regardless of clouds or darkness.
- Circular polarization
- A state in which the direction of oscillation of a radio wave rotates in a spiral as the wave travels.
- Interferometric SAR (InSAR)
- A method that measures ground movement from the phase difference in radio waves between two radar images taken of the same place at different times.
NewsLab news
The lab's presentation won the Young Scientist Award at ICSANE 2025
A student won the Graduation Thesis Encouragement Award for their graduation thesis
The lab's presentation won the Young Scientist Award at ICSANE 2023
ResearchResearch themes
The lab designs and develops synthetic aperture radar (SAR) to be mounted on the ground, aircraft, unmanned aerial vehicles, and satellites, and uses it to observe the Earth. Working internationally with space agencies, universities, and research institutes, it jointly develops satellite missions, sensors, and data analysis methods.
*Illustrative imageDevelopment of Microwave Sensors
The lab develops a variety of microwave remote sensors to be mounted on unmanned aerial vehicles, aircraft, stratospheric platforms, and small satellites. In particular, it is advancing research and development on synthetic aperture radar (SAR), weather control systems, and noise radar.
*Illustrative imageApplying AI to Remote Sensing
The lab pursues research on applying these technologies to the fields of the environment, healthcare, and disaster monitoring, including research on using artificial intelligence (AI) in remote sensing.
MembersFaculty
The Josaphat Lab consists of faculty members, a secretary, visiting professors, collaborating researchers, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorJosaphat Tetuko Sri Sumantyo
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Sentinel 1-IMG 5874-white” Rama / CC BY-SA 2.0 fr (cropped)
- Development of Microwave Sensors: “3D-printed antenna ( )” European Space Agency / CC BY-SA 2.0 (cropped)
- Applying AI to Remote Sensing: “Artificial Neural Network with Chip” mikemacmarketing / photo on flickr / CC BY 2.0 (cropped)
- Related lab (ICHII LAB.
（市井研究室） ): “Himawari Z” JMA's Himawari 9 Satellite / CC BY 4.0 (cropped) - Related lab (医用生体電磁気学研究室
（齊藤研究室） ): “Metallic lens antenna Bell Labs 1946” 作者不詳 / Public domain (cropped) - Related lab (生物機械工学研究室): “061 Wild Bumblebee in flight pollinating with Crocus Parc naturel régional Jura vaudois Photo by Giles Laurent” Giles Laurent / CC BY-SA 4.0 (cropped)
- Related lab (自律制御システム研究室
（Autonomous Control Systems Laboratory） ): “DJI Mavic 4 Pro Drone in Flight Napeague New York” Hayden Soloviev / CC BY 4.0 (cropped)
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