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Re-entry detection
Definition of re-entry detection
Re-entry detection refers to the capability to identify and monitor objects re-entering the Earth's atmosphere from space. This process involves the detection of both controlled re-entries, such as those orchestrated for satellites reaching the end of their operational life, and uncontrolled re-entries, which can include space debris or spent rocket stages descending unpredictably. The primary goal of re-entry detection is to track these objects to predict and mitigate potential risks they pose as they descend, particularly the risk of debris surviving re-entry and impacting populated areas. Effective re-entry detection is critical for maintaining space safety and mitigating risks to human life and property on Earth. Advanced methods typically involve the use of radar systems and other sensors to provide real-time tracking and updates on the status of re-entering objects.
Why re-entry detection matters
Re-entry detection matters because it reduces uncertainty on when and where surviving fragments may reach the ground, enabling timely risk communication and coordination with civil protection and aviation or maritime stakeholders. For controlled re-entries, it supports end-of-life compliance and post-mission assurance by confirming the object’s descent and breakup progression. For uncontrolled re-entries, it helps operators and authorities prioritize monitoring, update impact corridors as the trajectory evolves, and document events for safety, liability, and insurance assessments.
How Look Up supports re-entry monitoring
Look Up supports re-entry monitoring by detecting and tracking re-entering objects with SORASYS radars and by fusing multi-source data in the SYNAPSE platform to maintain an up-to-date space picture. SYNAPSE can catalogue events, characterize the object’s status, and deliver alerts and predictions through an interface or API, including secure on-premises deployment when required. This helps operators and authorities coordinate responses faster and with reduced uncertainty.
We deliver space situational awareness (SSA) and space domain awareness (SDA) solutions that help secure active satellites and ensure safe operations in the ever-growing expanse of space.