Weather Stream releases first light imagery from GEMS2 microwave radiometer

2026-06-25 · Source: SpaceNews · Field: Science & Research — Space Science & Astronomy, Environmental Science & Earth Systems, Engineering & Applied Sciences · Depth: Intermediate, quick

Summary

Weather Stream, a Boulder, Colorado-based commercial weather satellite operator, is collecting global atmospheric observations with its GEMS2-Amethyst satellite. Launched March 30 aboard the SpaceX Transporter 16 rideshare mission, this six-unit cubesat carries a dual-band passive microwave radiometer. It provides 3D atmospheric temperature and moisture profiles, measuring across a nearly 2,000-kilometer swath for global coverage approximately every 12 hours from a 600-kilometer sun synchronous orbit, expected to last over five years. Government agencies, including NOAA and the U.S. Air Force, support such instruments. NOAA awarded \$2.7 million to Weather Stream's subsidiary, Orbital Micro Systems, and \$7.3 million to Tomorrow.io on June 18 to assess commercial microwave sounder data quality and impact on forecast models. This follows Weather Stream's 2019 launch of the first commercial microwave radiometer in a three-unit cubesat. Weather Stream plans a GEMS constellation for data every 15 minutes, aligning with a 2021 NOAA report on microwave sounders' impact.

Key takeaway

For meteorologists and climate modelers evaluating new data sources, Weather Stream's GEMS2-Amethyst satellite offers enhanced 3D atmospheric temperature and moisture profiles. You should consider integrating this commercial microwave sounder data, especially as NOAA is actively assessing its impact on forecast models and tropical cyclone prediction. This data can significantly improve the accuracy of your numerical weather predictions and support critical decisions in sectors like defense and insurance.

Key insights

Commercial microwave radiometers from satellites are crucial for enhancing global weather forecasting and numerical weather models.

Principles

• Microwave sounders are highly impactful for weather prediction.
• Government contracts foster commercial weather data development.
• Cubesat technology enables cost-effective atmospheric sensing.

In practice

• Integrate commercial microwave data into forecast models.
• Utilize cubesats for atmospheric temperature/moisture profiling.
• Support military operations and insurance risk assessment.

Topics

• Weather Stream
• GEMS2-Amethyst
• Microwave Radiometry
• Cubesat Technology
• Numerical Weather Prediction
• Satellite Constellations

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Editorial summary, takeaway, and curation by AIssential. Original article published by SpaceNews.