Orbital Analysis
Research on debris trajectory analysis, collision probability, and decay prediction
This figure is an example of an orbit analysis of a Russian Anti-satellite weapons experiment (ASTA) event that occurred on November 15, 2021. The results of the orbit analysis show that the debris was expanded over a wide area from 150 km to 1400 km in altitude. Using software developed by Tanaka Laboratory, the ASAT experiment was revealed to have occurred at 02:45:01 UTC on November 15, 2022.
Tanaka Laboratory continues to develop orbit analysis codes on space objects.
Aerospace Traffic Management
Research on the relationship between space debris collision and aerospace traffic management
This figure shows the relationship between aircraft flying around the world and the decay of space debris. On 04/02/2018, the Chinese experimental module Tiangong-1 re-entered the atmosphere. The space objects fell at the point indicated by the red circle. Tanaka laboratory analyzes the collision possibility of space debris against aircraft by using ADS-B data, including aircraft location information.
Tanaka laboratory analyzes the collision possibility of space debris with aircraft, ships, and critical facilities on the ground by analyzing the big data, including the location information.
Artificial Intelligence
Research on solutions of the space debris problems using AI
This is an example of research using artificial intelligence techniques to predict the number of sunspots in the future. Solar activity warms the Earth's atmosphere and increases atmospheric density. As atmospheric density increases, air drag against space debris increases, and the debris changes its trajectory to fall to the Earth. If we can predict the number of sunspots, it will be possible to predict when space debris will re-enter the atmosphere.
Tanaka Laboratory is expanding the theme of debris research by actively incorporating advanced computer technologies such as artificial intelligence.
Space Situational Awareness
Research on space measurement systems (optical and RF radar) of space debris for space situational awareness
This shows an experiment in which space debris is measured using an astronomical telescope and radar owned by Tanaka Lab. It is impossible to collect all space debris and clean up space. The important thing is to monitor debris contamination from the ground using telescopes and radar. Using the data measured through experiments, we are developing techniques for noise reduction and automatic image recognition of flying objects.
Tanaka Laboratory continues experimental research related to Space Situational Awareness (SSA).
Hypervelocity Impact and Protection
Research on hypervelocity impact experiments and simulations for protection against space debris impacts
This figure shows a poster presentation on space debris bumper shields developed by a student in Tanaka Laboratory at an international conference. Tanaka Laboratory studies Hypervelocity Impact(HVI) phenomena caused by space debris impact. So far, they have conducted the HVI experiment and numerical simulations. The research on HVI Experiment is currently in a dormant state but is in the preparation stage for resumption.
Tanaka laboratory plans to resume research on debris fracture phenomena.
Electronics Devices for space
Development of space measurement instruments for onboard satellites, and Collaboration with JAXA Mizuno Laboratory on the LIDARX
Please visit the JAXA Mizuno Laboratory website.