AAC Clyde Space
OPERATING
Designs and manufactures small satellite platforms and subsystems, operates satellite constellations, and delivers space-based data services
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SSO
67 in indexA near-polar LEO inclined so the satellite passes over each part of Earth at the same local solar time every orbit.
Sun-Synchronous Orbit (SSO) is a near-polar Low Earth Orbit (typically 600–800 km, inclined ~97–98°) where the orbital plane precesses in sync with Earth's motion around the Sun. A satellite in SSO crosses every point at the same local solar time on each pass, producing consistent illumination.
SSO is the default for Earth observation. Consistent lighting makes change detection, classification, and time-series imagery viable. Most commercial EO constellations (Planet, BlackSky, ICEYE, Capella) live here.
- Optical Earth imaging (Planet, Maxar)
- Synthetic aperture radar (Capella, ICEYE, Umbra)
- Multispectral and hyperspectral imaging
Companies working with SSO
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Aerospacelab
OPERATING
Designs and manufactures satellite platforms, subsystems, and Earth observation payloads for LEO constellations, from 50 kg to 5,000 kg
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Agnikul Cosmos
OPERATING
Designs, manufactures, and launches small-lift orbital rockets powered by single-piece 3D-printed semi-cryogenic engines for dedicated small-satellite missions
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Albedo
OPERATING
Designs and manufactures flight-proven Very Low Earth Orbit satellite buses for defense, communications, and specialized payload operators
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Andøya Space
OPERATING
Operates sounding rocket ranges and Europe's northernmost orbital spaceport, providing launch services, defence testing, drone operations, and space education from northern Norway
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Arianespace
OPERATING
Operates Ariane 6 and Vega C launch vehicles from the Guiana Space Centre, serving European institutional and global commercial satellite customers
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Avio
OPERATING
Manufactures solid and liquid propulsion systems for European space launchers and produces the Vega family of small-lift launch vehicles
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Axelspace
OPERATING
Designs, manufactures, and operates microsatellite constellations for Earth observation and provides one-stop satellite mission services
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CAS Space
OPERATING
Develops solid and liquid-propellant launch vehicles for dedicated and rideshare satellite missions, suborbital scientific experimentation, and space tourism
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Capella Space
OPERATING
Designs, manufactures, and operates X-band synthetic aperture radar satellites delivering sub-meter resolution Earth observation imagery in all weather conditions
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Chang Guang Satellite Technology
OPERATING
Manufactures and operates the Jilin-1 constellation of over 100 optical remote sensing satellites and provides geospatial data products and services
EXPLORE
China National Space Administration
OPERATING
Governs China's civil space programs, oversees lunar and planetary exploration missions, and coordinates international space cooperation
EXPLORE
[release] Successful H-SSOD Technology Demonstration and Deployment of a Small Satellite from HTV-X1 (Japanese Only)
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