Full Breakdown
Astroscale's Groundbreaking Mission to Inspect Defunct Satellites
4/17/2026, 11:20:59 AM
Overview of the Mission
Astroscale, a Japanese company focused on space sustainability, has announced its upcoming mission, In-situ Space Situational Awareness-Japan 1 (ISSA-J1), set to launch in 2027. This mission aims to inspect two defunct Japanese satellites, marking a significant advancement in satellite servicing and space situational awareness. The ISSA-J1 spacecraft, weighing 1,430 pounds (650 kilograms), will utilize advanced thrusters and imaging systems to conduct detailed visual inspections of the Advanced Land Observing Satellite (ALOS) and the Advanced Earth Observing Satellite-II (ADEOS-II).
Mission Objectives and Methodology
The primary goal of ISSA-J1 is to gather critical insights into the conditions of the targeted satellites, which cannot be obtained from ground observations. ALOS, launched in 2006, lost power in 2011 and remains in a near-polar orbit at an altitude of 429 miles (691 kilometers). ADEOS-II, launched in 2002, ceased operations after less than a year due to a solar panel failure and orbits at approximately 500 miles (806 kilometers) above Earth. The ISSA-J1 spacecraft will approach ALOS first, conducting observations from a distance before moving in for a closer inspection. Following this, it will transition to another orbit to repeat the process with ADEOS-II.
Nobu Okada, managing director of Astroscale Japan, emphasized the mission's significance, stating, "On-orbit inspection provides critical insight into the condition of satellites that cannot be obtained from the ground." The mission is designed to demonstrate the capability of inspecting multiple satellites in different orbits within a single mission, thus enhancing the understanding of spacecraft conditions and preparing for future servicing.
Support and Funding
Astroscale's ISSA-J1 mission has received backing from the Japan Ministry of Education, Culture, Sports, Science and Technology, which selected the company for this on-orbit inspection demonstration as part of its Small and Business Innovation Research program. This initiative aims to bolster Japan's capabilities in space situational awareness and in-orbit servicing.
Criticism & Opposition
While the mission is largely viewed as a positive step towards improving space sustainability, some critics express concerns regarding the potential risks associated with increased satellite inspections and the implications for space debris management. The balance between advancing technology and ensuring the safety of existing satellites remains a topic of debate among experts in the field.
What's Next
As the launch date approaches, further developments regarding the ISSA-J1 mission are expected, including updates on the spacecraft's design and operational capabilities. The mission represents a pivotal moment in the evolution of satellite servicing and the broader efforts to maintain sustainable practices in space exploration.
Verbatim Quotes
- "On-orbit inspection provides critical insight into the condition of satellites that cannot be obtained from the ground." — Nobu Okada, Managing Director of Astroscale Japan.
