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Sensing Systems Lab
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A lab that studies sensing of weather phenomena using radar and satellites.
AboutAbout the lab
Contributing to the future of human society through weather measurement technology
The Sensing Systems Lab (Tomoo Lab) conducts research on developing sensing systems centered on weather phenomena.
The lab develops phased array weather radar and wideband weather radar, and works with JAXA in joint research on GSMaP, a near-real-time global rainfall distribution map based on satellite observations.
The 2021 home page introduction also lists research on support vector machines and the development of an optimal solution search method using chaotic dynamics.
The lab accepts undergraduate students and graduate students of the Division of Electrical, Electronic and Infocommunications Engineering.
Key terms
- Phased array radar
- Radar that observes rain clouds in three dimensions through electronic scanning. A single three-dimensional observation takes as little as 10 seconds
- GPM
- The Global Precipitation Measurement mission. Led by Japan and the United States, precipitation-observing satellites from various countries cooperate to observe rain clouds
- GSMaP
- A global precipitation map developed by JAXA. It combines satellite radar and radiometer observations to understand precipitation worldwide
NewsLab news
A paper first-authored by a project researcher was published in Journal of Geophysical Research: Atmospheres
A master's student received a Student Presentation Award at the 104th Research Presentation Meeting of the Society of Atmospheric Electricity of Japan
A master's student received the Student Outstanding Presentation Award at the Japan Geoscience Union Meeting 2025
A demonstration experiment of MP-PAWR, in which the lab participates, started during the Expo
ResearchResearch themes
The lab aims to contribute to the future of human society by developing sensing systems centered on weather phenomena. Its work includes developing phased array weather radar and wideband radar, observing rainfall with satellites, and analyzing observation data from the International Space Station.
*Illustrative imageWeather radar for capturing guerrilla rainstorms
To capture cumulonimbus clouds that develop locally and in a short time, the lab researches and develops a one-dimensional phased array radar that performs electronic scanning in the elevation direction. A three-dimensional observation of rain clouds takes as little as 10 seconds (30 seconds in routine operation).
*Illustrative imageHigh-resolution wideband radar
The lab develops wideband radar with a time resolution of 1 minute and a range resolution of several meters, using wideband signals for transmission and applying pulse compression. In the future, it aims to network multiple radars to obtain detailed information over a wider area.
*Illustrative imageAccuracy validation of satellite precipitation radar
The lab compares data observed by GPM mission satellites with ground-based radar to validate the observation accuracy of the DPR (Dual-Frequency Precipitation Radar). It also develops calibration algorithms for ground-based radar.
Understanding global rainfall from satellites
In joint research with JAXA, the lab develops high-accuracy GSMaP algorithms. It works on methods using infrared data from geostationary satellites and methods combining satellite and ground observations, and also validates rainfall estimates using ground data.
MembersFaculty
The members of the Sensing Systems Lab (Tomoo Lab) consist of faculty, visiting faculty, project researchers, administrative assistants, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorTomoo Tomoo
- Associate ProfessorEiichi Yoshikawa
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: “CASBV radar de Blainville antenne” Pierre cb / CC BY-SA 4.0 (cropped)
- Weather radar for capturing guerrilla rainstorms: “Advanced Technology Demonstrator radar antenna array 02” NOAA / Public domain (cropped)
- High-resolution wideband radar: “Weather radar antenna "Kontur"” Elen Schurova from Moscow, Russia / CC BY-SA 2.0 (cropped)
- Accuracy validation of satellite precipitation radar: “Visualization of the GPM Core Observatory and Partner Satellites” NASA / Public domain (cropped)
- Related lab (Media Integrated Communication Engineering Lab): “ShakeAlert Sensor Site” Paul Laustsen Public Affairs - Western States Communications and Publishing / Public domain (cropped)
- Related lab (Intelligent Integrated Systems Lab [Graduate School of Information Science and Technology]): “MC705 microcontroller ( )” Sergey G from Russia / CC BY 2.0 (cropped)
- Related lab (Multimedia Data Engineering Lab): “Wikimedia Foundation Servers-8055 03 square” Victorgrigas / CC BY-SA 4.0 (cropped)
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