Wildfire Detection Satellites Launching This Summer Can Spot a 15-Foot Fire From Orbit

Three satellites engineered from the ground up to detect wildfires — not adapted from weather instruments, but designed exclusively for fire — are at Vandenberg Space Force Base in California, cleared for a SpaceX rideshare launch this summer. The Bezos Earth Fund announced a $26 million grant to Earth Fire Alliance on June 17, 2026, describing it as the largest single philanthropic grant to wildfire detection on record. With the money now committed and the hardware already shipped, the question shifts from whether FireSat will launch to what it can do once it does. The answer is substantially different from anything currently in orbit. "During the LA fires, I watched friends and family lose everything," said Lauren Sánchez Bezos, vice chair of the Bezos Earth Fund. "That feeling stays with you and makes you ask: What if we could respond faster? That's what FireSat is trying to do." What Existing Satellites Cannot Do Weather satellites such as NOAA's Geostationary Operational Environmental Satellites and NASA's Visible Infrared Imaging Radiometer Suite can spot fires, but they were designed to do other things. The most capable fire-monitoring sensor currently in wide operational use resolves each image cell at 375 meters — meaning a fire has to grow to the size of a city block before it registers reliably. FireSat, built for Earth Fire Alliance by aerospace company Muon Space, targets fires at 15 feet by 15 feet, roughly the floor area of a beach bonfire, anywhere on Earth. That difference in detection threshold matters most in the first minutes of a wildfire. A half-acre grass fire that started beside an Oregon road last summer — too small for a conventional satellite to flag — was detected by a FireSat prototype before any fire agency had been notified. The three satellites set to launch this summer are the operational successors to that prototype. Four Infrared Bands, Simultaneously What makes the detection resolution possible is a multispectral infrared approach that collects data across four distinct wavelength ranges at the same time. Short-wave infrared cuts through smoke that would blind a standard optical camera. Mid-wave infrared detects both high-intensity flames and lower-temperature smoldering. Long-wave infrared measures ground temperature across the fire perimeter. Near-infrared shows how vegetation is reacting to heat stress before visible flames appear. No existing operational satellite combines all four at FireSat's resolution. NOAA's geostationary satellites offer near-continuous regional coverage but at resolution measured in kilometers, not meters. Polar-orbiting satellites achieve better resolution but pass over any given point only once or twice per day. FireSat's on-board AI pipeline addresses the false-alarm problem that has limited earlier high-sensitivity systems. At each 15-foot observation point, the AI compares the current reading against a rolling archive of roughly 1,000 prior images of the same location, then factors in local weather data before flagging a fire. That process allows it to distinguish an actual ignition from sunlight reflecting off a metal roof or a patch of warm pavement. "We don't have false alarms," said Brian Collins, Earth Fire Alliance's executive director. The GPS Signal That Predicts Fire Before It Starts FireSat carries a sensor system that is absent from most descriptions of the program: a next-generation Global Navigation Satellite System Reflectometry receiver descended from technology developed at the University of Michigan for NASA's CYGNSS hurricane-forecasting satellite mission. The GNSS-R system works by measuring how GPS signals change when they bounce off the Earth's surface. The strength and character of the reflected signal reveal how much water is in the soil below — a measurement directly relevant to fire risk because dry soil and dry vegetation are the fuel preconditions that determine where and how aggressively a fire will burn. FireSat's receivers are substantially upgraded from the CYGNSS originals. They simultaneously detect reflections from approximately 20 different GPS satellites at any given moment — five times the number CYGNSS tracked — and add multiple polarization detection that provides additional information about moisture content in soil versus vegetation. Combined with the infrared fire-detection data, that soil moisture record creates the dataset foundation for predictive fire risk modeling: identifying areas at elevated ignition risk before a spark occurs, not just tracking fires after they start. "Ultimately, if you build a database of this information and you start to combine it with other information, like weather, landscape, and terrain, we hope that you can get to a place where now you're predicting wildfire," said Tom Taylor, president and CEO of the Bezos Earth Fund. What Early-Phase Coverage Looks Like The three satellites launching this summer will not immediately provide the 20-minute global scan interval that defines FireSat's long-term capability. At launch, the system will deliver multiple passes over each high-risk region daily, with initial coverage prioritized on the Amazon Basin — where fires have burned for up to 24 hours before ground-based authorities received any notification. The 20-minute global revisit time requires the full constellation, which Earth Fire Alliance projects will reach approximately 50 satellites in the early 2030s. By 2029, the program expects to detect any 15-foot fire anywhere on Earth within one hour. Early adopters who have already committed to use the data include fire agencies in California, Colorado, Oregon, and Texas, as well as partner organizations in Africa, Australia, and Portugal. CAL FIRE Deputy Chief Marcus Hernandez, who heads the state's Office of Wildfire Technology Research and Development, cited the challenge of wind-driven fires that move too quickly for aerial monitoring. "Fires get very large so you can't see the entire perimeter, and they're in remote places sometimes," Hernandez said. "We want to see where the fire is moving and the threats." The program also aims to build a shared data network connecting fire agencies across jurisdictions, allowing a team in California to exchange real-time observations with counterparts in Portugal as simultaneous fire seasons unfold across continents. A $10 Billion Fund Under Pressure to Move Faster The $26 million grant is among the most operationally tangible investments the Bezos Earth Fund has made since Jeff Bezos launched it in 2020 with a $10 billion commitment — the largest individual philanthropic pledge to climate and nature on record. Five years in, the fund has deployed roughly $2.4 billion, leaving approximately $7 billion to disburse before its 2030 deadline, a pace that Fortune reported as insufficient to meet the commitment on schedule. In July 2025, Bezos replaced the fund's founding CEO with Tom Taylor, who had previously led Amazon's Alexa division — a hire that signaled a shift toward operational velocity. Taylor described the FireSat grant as precisely the kind of time-sensitive, high-leverage bet the fund is now prioritizing. "We saw an opportunity to do something quickly — we could make sure the launch happens this year rather than waiting a year," Taylor said. "An important part of our decision is where we can make a difference." The contrast with Bezos's ex-wife MacKenzie Scott is sharpening. Forbes estimates Scott has donated approximately $26 billion over seven years, with $7.2 billion disbursed in 2025 alone — a single year's giving that exceeds Bezos's total lifetime charitable contributions, estimated by Forbes at roughly $4.7 billion. Lauren Sánchez Bezos, vice chair of the Earth Fund and its most public spokesperson over the past year, has fronted several major announcements: $37.5 million in ocean conservation commitments to 12 Pacific Island nations and territories, $30 million in Phase II awards from the fund's AI Grand Chal