Muon Space Releases First Light Images from FireSat Protoflight

Advanced multispectral infrared payload demonstrates exceptional capabilities in inaugural on-orbit demonstration

MOUNTAIN VIEW, Calif., June 26, 2025 /PRNewswire/ -- Muon Space, a leading provider of end-to-end space systems specializing in mission-optimized satellite constellations, today released the first light images from its FireSat Protoflight, marking a significant milestone in the development of the world's first dedicated wildfire detection and monitoring constellation. The images, captured by Muon's state-of-the-art six-channel multispectral infrared (IR) instrument, demonstrate the exceptional capabilities of this revolutionary IR technology for detecting and monitoring thermal activities.

Launched on March 14th aboard SpaceX's Transporter-13 mission, the FireSat constellation is a collaboration between Muon and the nonprofit Earth Fire Alliance to enhance global wildfire response by delivering actionable data to first responders, policymakers, and communities facing escalating wildfire threats. The satellite's six-channel multispectral IR instrument – designed and built in-house – places Muon among a select group of commercial companies capable of developing and operating advanced space-based thermal sensors. Capturing IR imagery validates both the instrument and Muon's vertically integrated satellite platform.

"The FireSat first light images demonstrate Muon's approach to building mission-optimized satellites including purpose-built instruments," said Jonny Dyer, CEO of Muon Space. "I'm ecstatic with both the speed at which we moved from FireSat mission formulation to an orbit demonstration and the quality of the data that we are now collecting."

Captured in June 2025 using FireSat Protoflight's multispectral infrared sensors, our first imagery set reveals urban heat islands, airport runway activity, and water temperature variations in Sydney, Australia; lava fountains at Hawaii's Kīlauea volcano; and gas flares at Libya's Sarir oil field complex.

"These first light images confirm that our IR sensors are operating as designed and collecting high-quality data," said Dan McCleese, Chief Scientist of Muon Space. "Infrared imaging with this quality is one of the most technically demanding domains in remote sensing, and we're proud to be among the few commercial players advancing this capability in orbit."

A New Layer of Intelligence for Wildfire Detection, Tracking, and Response

FireSat is capable of multispectral imaging across the visible, near-infrared, short-, mid- and long-wave infrared bands simultaneously. High-fidelity IR data is essential for detecting wildfires in their early stages, monitoring fire dynamics, and tracking other thermal anomalies. FireSat addresses a longstanding gap in space-based wildfire monitoring by delivering persistent, high-resolution, actionable intelligence to government and commercial users.

Distinguished by its high-dynamic range (HDR) multispectral IR instrument, the FireSat Constellation is uniquely equipped to differentiate genuine wildfire events from false positives and enhance the accuracy and reliability of wildfire detection and assessment of fire intensity. The FireSat constellation will operate in LEO with an observation swath width of 1,500 km and an nadir ground sample distance of 50m. The instrument's resolution, sensitivity and large dynamic range enable it to detect small cool fires 5x5 meters while also imaging without saturation for hot intense fires.

As the demonstration mission for a planned 50+ satellite constellation, FireSat Protoflight will soon begin providing high-resolution thermal infrared data to meet growing demand across government, commercial, and environmental sectors. The full constellation will deliver global coverage, with each point on Earth observed every 20 minutes and key wildfire-prone regions benefiting from more frequent observations. The FireSat initiative is led by the Earth Fire Alliance and supported by Google Research, along with leading NGOs and philanthropic organizations including Google.org, the Gordon and Betty Moore Foundation, and the Environmental Defense Fund.

This milestone builds on Muon's earlier announcement that FireSat was successfully deployed and communicating in orbit. The company remains on track to launch the first block of three additional FireSat satellites in 2026, with full operational FireSat constellation capacity targeted for 2030.

About Muon Space

Founded in 2021, Muon Space is an end-to-end space systems company that designs, builds, and operates mission-optimized satellite constellations to deliver critical data and enable real-time compute and decision-making in space. Its proprietary technology stack, Halo™, integrates advanced spacecraft platforms, robust payload integration and management, and a powerful software-defined orchestration layer to enable high-performance capabilities at unprecedented speed – from concept to orbit. With state-of-the-art production facilities in Silicon Valley and a growing track record of national security and commercial customers, Muon Space is redefining how critical Earth intelligence is delivered from space.

For more information on Muon Space, visit: https://www.muonspace.com/

About Earth Fire Alliance

Earth Fire Alliance is a California Nonprofit Public Benefit Corporation founded in 2024 on the belief that high-fidelity data, accessible on a global scale, will transform humanity's collective approach and relationship to fire. The Alliance shares a vision of expanding wildfire focus and funding from reactive suppression to proactive stewardship that includes better informed real-time decisions on the ground, data-driven resilience initiatives, and improved understanding about the positive and negative role of fire on the landscape. Committed to delivering transformative real-time data from all wildfires on Earth through user-driven technology and radical collaboration, Earth Fire Alliance champions the FireSat satellite constellation. FireSat will deliver unprecedented data about where fires are and how fast they're moving to frontline fire responders around the globe.

Learn more about the Alliance, FireSat, and how to get involved or support at https://www.earthfirealliance.org/.  

SOURCE Muon Space