Spire Global Receives First Data from HyMS Demonstrator Satellite; Advancing Next-Generation Atmospheric Intelligence

Key Terms

hyperspectral microwave sounder technical

A hyperspectral microwave sounder is a satellite instrument that reads faint microwave signals from the atmosphere at many closely spaced frequencies to build detailed vertical profiles of temperature, humidity and precipitation. Think of it as a multi-color thermometer that sees through clouds to reveal weather layers; investors care because improved, earlier and more accurate weather and climate data can reduce uncertainty for agriculture, energy, shipping and insurance forecasts, affecting revenues and risk models.

radio occultation technical

Radio occultation is a technique that uses a signal from a satellite or spacecraft as it passes behind Earth to sense how the planet’s atmosphere bends and slows that signal, like watching how a flashlight beam dims and blurs when it shines through fog. The measured changes reveal temperature, humidity and ionospheric conditions with high precision, which investors care about because better weather, climate and positioning data improve forecasting, supply-chain planning, agricultural yields and insurance risk models.

microwave sounding data technical

Microwave sounding data are measurements from satellites that use microwave energy to sense temperature and moisture in different layers of the atmosphere, similar to how a medical thermometer reads temperature through clothing. Investors use these readings as objective, near-real-time weather and climate indicators that can affect crop yields, energy demand, shipping routes and insurance risk, so changes in the data can influence commodity prices and company forecasts.

radio frequency interference (RFI) technical

Radio frequency interference (RFI) is unwanted radio waves that disrupt electronic equipment and wireless communications, like static on a radio or several people trying to speak at once. For investors it matters because RFI can interrupt critical systems—trade execution, telemetry, or medical devices—leading to lost revenue, regulatory penalties, safety issues, or costly fixes; understanding RFI risk helps assess operational and compliance exposure.

Milestone validates hyperspectral microwave sensing capability, complementing existing Radio Occultation data to deliver more comprehensive atmospheric observations

VIENNA, Va.--(BUSINESS WIRE)-- Spire Global, Inc. (NYSE: SPIR) (“Spire” or “the Company”), a global provider of space-based data, analytics and intelligence, has successfully received its first data from the Hyperspectral Microwave Sounder (HyMS) demonstrator satellite, marking the mission’s “first light” milestone and validating its hyperspectral microwave sensing capabilities.

The HyMS instrument launched as a technology demonstrator in early 2026, designed to evaluate the impact of a first-of-its-kind hyperspectral microwave sounder in a compact form factor in orbit. HyMS captures detailed internal views of the Earth’s atmosphere, measuring key atmospheric variables including temperature, humidity, and precipitation.

Demand for high-quality atmospheric data continues to grow as weather-related disruptions increasingly impact industries such as aviation, energy, agriculture, government operations, and more. The HyMS demonstrator expands Spire’s weather sensing capabilities, increasing the range of atmospheric observations available to government and commercial customers worldwide, particularly in data-sparse regions and during severe weather events where forecast accuracy is most critical.

Microwave sounding data is widely recognized as one of the most impactful inputs for weather forecasting systems, yet traditional microwave sounders typically observe only a limited number of channels. Spire’s HyMS sensor introduces hyperspectral microwave sounding, enabling more than 1,000 sensing channels across key water vapor and temperature bands. This

capability supports high-vertical-resolution atmospheric profiling while improving resilience to radio frequency interference (RFI) in critical microwave weather bands.

Combined with Spire’s Radio Occultation (RO) data, which captures high-vertical-resolution temperature and moisture profiles, these complementary sensing methods have the potential to provide a complete and more resilient picture of atmospheric conditions.

“With our Hyperspectral Microwave Sounder satellite, we are working towards bridging a critical gap in global weather observation,” said Theresa Condor, CEO of Spire Global. “This mission proves we can deliver the sophisticated moisture and temperature profiling needed, but at the speed and scale of a commercial constellation. It’s a powerful addition to our existing atmospheric sensing capabilities, allowing us to provide a more holistic view of the planet, even in the most challenging weather conditions.”

Spire's weather data is currently used by leading weather agencies including NOAA, EUMETSAT, and the UK Met Office, as well as commercial weather organizations globally.

About Spire Global, Inc.

Spire (NYSE: SPIR) is a global provider of space-based data, analytics and space services, offering unique datasets and powerful insights about Earth so that organizations can make decisions with confidence in a rapidly changing world. Spire builds, owns, and operates a fully deployed satellite constellation that observes the Earth in real time using radio frequency technology. The data acquired by Spire’s satellites provides global weather intelligence, ship and plane movements, and spoofing and jamming detection to better predict how their patterns impact economies, global security, business operations and the environment. Spire also offers Space as a Service solutions that empower customers to leverage its established infrastructure to put their business in space. Spire has offices across the U.S., Canada, UK, Luxembourg and Germany. To learn more, visit spire.com.

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Source: Spire Global, Inc.