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Remote Sensing Engineering / Radar Atmospheric Science Lab
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The lab measures the sky with radio waves to uncover the workings of the atmosphere from the ground to space.
AboutAbout the lab
Observing the atmosphere with radar.
The Remote Sensing Engineering Lab (Yokoyama Lab, Research Institute for Sustainable Humanosphere) develops technologies that measure the atmosphere from a distance using radio waves, and seeks to uncover the various phenomena in Earth's atmosphere.
The lab develops radar technologies that measure turbulence, electrons, rain, clouds, and more using radio waves with wavelengths from several meters to several millimeters.
Its targets span the atmosphere over a wide range of altitudes, from near the ground to the ionosphere above 100 km, and through international collaboration it also works to elucidate tropical atmospheric phenomena.
Key terms
- Ionosphere
- The layer above an altitude of about 100 km where part of the atmosphere is ionized by solar ultraviolet light and becomes plasma.
- MU radar
- One of Asia's largest VHF-band radars for atmospheric observation, located in Shigaraki, Koka, Shiga Prefecture.
- Atmospheric gravity wave
- A type of wave that travels through the atmosphere. It propagates upward from the lower atmosphere and also affects the ionosphere.
ResearchResearch themes
The lab works on measurement of the atmosphere and space with large radars, the atmosphere of the ionosphere, and the equatorial atmosphere.
*Illustrative imageMeasuring the atmosphere with large radar
Making use of the high capability of the MU radar, one of Asia's largest VHF-band radars, the lab develops atmospheric measurement techniques and works to elucidate atmospheric phenomena. It has also begun developing a system that processes the accumulated data with machine learning.
*Illustrative imageThe ionosphere and atmospheric waves
The ionosphere affects radio waves and causes errors in GPS and other systems. The lab investigates the relationship between atmospheric gravity waves and electromagnetic phenomena through radar, rocket, and satellite observations, and also reproduces and predicts ionospheric disturbances through numerical simulation.
*Illustrative imageObserving the equatorial atmosphere
Using the Equatorial Atmosphere Radar installed on Sumatra Island in Indonesia, the lab continuously observes the tropical atmosphere and elucidates phenomena such as energy transport by cumulus convection and plasma bubbles in the ionosphere.
MembersFaculty
The faculty member of the Remote Sensing Engineering Lab is Professor Tatsuhiro Yokoyama.
- ProfessorTatsuhiro Yokoyama
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: “Atmospheric Radar Array - geograph.org.uk - 3106005” Chris Andrews / CC BY-SA 2.0 (cropped)
- Measuring the atmosphere with large radar: “Tropospheric Doppler Radar Wind Profiler for Artemis (KSC-20210630-PH-KLS01 0008)” NASA Kennedy Space Center / NASA/Kim Shiflett / Public domain (cropped)
- The ionosphere and atmospheric waves: “ICON and Airglow - Daytime View” NASA Goddard's Conceptual Image Lab/B. Monroe / Public domain (cropped)
- Observing the equatorial atmosphere: “Cumulonimbus cloud over Africa” NASA / Public domain (cropped)
- Related lab (Earth Atmosphere Measurement / Atmospheric Precision Measurement and Diagnosis Lab): “MU Radar, Research Institute for Sustainable Humanosphere, Kyoto University - Oct 15, 2011” eiko / CC BY-SA 2.0 (cropped)
- Related lab (Optical Functional Device Engineering Lab): “Blue led 09 of 10” Renato.pierri / CC BY-SA 4.0 (cropped)
- Related lab (Radio Science Simulation Lab): “Lofoten, Norway (Unsplash)” Johannes Groll followhansi / CC0 (cropped)
- Related lab (Spatiotemporal Sensing Lab): “NIMH MEG” Unknown NIMH author / Public domain (cropped)
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