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Space Information Processing Lab
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The lab studies space weather using satellite data and simulations.
AboutAbout the lab
Reading the space from the Sun to the Earth through observation and computation
The Miyoshi Lab studies phenomena in the region from the Sun to the Earth (geospace).
The lab combines state-of-the-art observation instruments, data analysis techniques, and computer simulations.
Using large-scale data from satellites and other platforms, along with machine learning, the lab works on space weather and space plasma.
The lab also develops observation instruments to be carried on satellites and sounding rockets.
Key terms
- Geospace
- The space surrounding the Earth, including the magnetosphere and the ionosphere
- Space weather
- The state of the space around the Earth, which changes constantly with solar activity
- Data assimilation
- A method that combines observational data with numerical simulations to estimate the actual state of a system
NewsLab news
Prof. Miyoshi and colleagues show, using ground-based and Arase satellite observations, that pulsating aurora occurs more often in the morning
A collaborative study including Prof. Miyoshi finds that heavy ions of terrestrial origin are the key to the development of giant magnetic storms
A collaborative study including Prof. Miyoshi discovers that giant magnetic storms carry oxygen ions from the Earth's atmosphere into space
Prof. Miyoshi and colleagues discover ring-shaped pulsating aurora
Prof. Miyoshi receives the Japan Leader Award from Research.com
ResearchResearch themes
The lab studies phenomena in the region from the Sun to the Earth (geospace) using world-leading observation instruments, data analysis techniques, and computer simulations. Its work spans analysis of satellite observation data, numerical simulation, instrument development, data assimilation, and machine learning.
*Illustrative imageData Analysis for Space Weather and Planetary Environments
Using data from JAXA's Arase scientific satellite, the lab studies aurora, variations in high-energy particles in the radiation belts, and plasma outflow from the Earth into space. It also analyzes images from highly sensitive aurora cameras installed overseas and takes part in sounding rocket experiments.
*Illustrative imageSimulation of Space Plasma
Using large-scale numerical simulations on supercomputers, the lab aims to understand phenomena in space plasma in which many different scales and physical processes are intertwined.
*Illustrative imageInstruments for Rockets and Satellites
To clarify the outflow of ions from the Earth into space, the lab developed an instrument that can measure very-low-energy ions separately by species. The lab handles everything from design to manufacturing and testing, aiming to fly the instrument on future rocket experiments and satellites.
*Illustrative imageDiagnosing the Space Environment with Data Assimilation
Using data assimilation, a method that merges observational data with numerical simulations, the lab diagnoses the state of the space environment, which is difficult to measure directly, with the aim of predicting its future variations.
MembersFaculty
The Miyoshi Lab's members consist of faculty, a secretary, and master's and undergraduate students.As of 2026
- ProfessorYoshizumi Miyoshi
- Associate ProfessorHaruhisa Iijima
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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: “Anatomy of Earth's magnetosphere ESA518009” European Space Agency / CC BY-SA 3.0 igo (cropped)
- Data Analysis for Space Weather and Planetary Environments: “Van Allen Radiation Belt Model shown with 2 VA Probes” NASA / Public domain (cropped)
- Simulation of Space Plasma: “Solar Storm Excites Martian Magnetosphere (SVS5502 - marsMagnetosphere VelTracersExtended 9-6-2024a jmag normal flightA noAnnotation 4k 00420 print)” NASA's Scientific Visualization Studio / Public domain (cropped)
- Instruments for Rockets and Satellites: “First NASA ISINGLASS rocket launch” NASA / Public domain (cropped)
- Diagnosing the Space Environment with Data Assimilation: “Smile's ultraviolet camera sees Earth reacting to coronal mass ejection ESA509889” European Space Agency / CC BY-SA 3.0 igo (cropped)
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