The Tianmu-1 Occultation Meteorological Constellation is China’s first commercial low-orbit meteorological satellite system. Its first-phase sun-synchronous constellation with 23 satellites in stable orbit is fully completed. Equipped with GNSS occultation and ocean reflection payloads supporting four navigation systems, it generates 30,000+ daily atmospheric profiles, delivering global all-weather data with 200km×200km spatial and 6-hour temporal resolution.