On January 8, 2025, a red dot appeared on NASA’s Fire Information for Resource Management System, a signal of a wildfire that would devastate parts of California. With the Aqua satellite overhead, the data it collected often reached emergency services faster than 911 calls. However, recent findings reveal gaps in that data due to issues like space debris that forced the satellite to maneuver.
Aqua is a key part of NASA’s Earth Observing System, which also includes satellites Terra and Aura. Together, they help scientists understand climate effects, like deforestation and ocean changes. But their operations are threatened by increasing amounts of orbital debris. According to a 2018 assessment, the satellites performed over 30 maneuvers to dodge space debris between 2005 and 2018, sometimes resulting in corrupted data.
The cost of these evasive actions goes beyond science. Andrew Bonwick from Relm Insurance explains that routine maneuvers use precious fuel. When satellites are on tight schedules, missing imagery can be a real problem.
The situation has grown dire. In 2005, about 16,000 pieces of debris were tracked in space. By 2026, that number surged to over 44,000—an increase of nearly 180%. Even more concerning, ESA estimates there are over a million smaller fragments that can still cause damage. The debris comes from satellite collisions and tests of anti-satellite weapons, with recent events showing that even carefully launched satellites can end up in close encounters.
This escalation in debris has made it harder for satellites to get insured, forcing organizations to shoulder more risks. For instance, MethaneSAT, designed to monitor methane emissions, stopped working just 15 months after launch. Investigators couldn’t pinpoint the problem, which highlights the vulnerability even well-planned missions face.
Aqua itself is nearing the end of its lifespan. Launched with a six-year mission, it has now been active for nearly 24 years, greatly exceeding expectations. However, it has only about 30 kilograms of fuel left, needed for a controlled re-entry when it’s retired later in 2026. Once that happens, it won’t be able to maneuver, increasing collision risks, particularly in its current altitude.
Experts like Claire Parkinson from NASA reflect on Aqua’s long lifespan. If foreseen, more fuel could have been included earlier. This satellite has survived multiple failures, but time is ticking.
Looking ahead, NASA will try to continue monitoring with other sensors after Aqua and Terra retire. Yet replicating the current environmental data will be a challenge. NASA faces budget restrictions, which opens the door for private companies like Google, who plan to launch their own fire-detection satellites. However, the full impact on climate observations remains unclear.
The big question is how to navigate the complex and hazardous landscape of low Earth orbit. As new satellites are developed, they face risks Aqua avoided for many years. The environment is getting more crowded, and the risk of collisions is expected to rise before it gets better. The future of climate monitoring may depend on how well we can manage these challenges.
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