Medium Earth Orbit (MEO) is a region of space around the Earth located at altitudes between Low Earth Orbit (LEO) and Geostationary Orbit (GEO), typically ranging from 2,000 kilometers (approximately 1,243 miles) to about 35,786 kilometers (approximately 22,236 miles) above the Earth's surface.
MEO is commonly used for various types of satellite operations, including navigation, communication, and scientific research. Satellites in MEO have an orbital period that varies depending on their specific altitude, allowing for coverage that balances between the low latency and higher frequency of passes of LEO satellites and the broader coverage but higher latency of GEO satellites.
This orbit is particularly important for Global Navigation Satellite Systems (GNSS) such as the Global Positioning System (GPS), GLONASS, Galileo, and BeiDou, which require medium altitude to optimize coverage, accuracy, and stability for positioning and timing functions across the globe.
MEO satellites often have more extended operational lifespans and larger coverage areas per satellite when compared to LEO satellites, but with less total constellation size than those required for constant global LEO coverage.
Medium Earth Orbit is where many of the most mission-critical services operate, especially GNSS constellations that underpin positioning, navigation, and timing for aviation, maritime, telecom networks, finance, and defense.
Because MEO satellites have wide coverage and high strategic value, operators prioritize continuous orbit knowledge, rapid anomaly detection, and reliable conjunction assessment to avoid service degradation.
MEO also sits in a complex traffic environment: fewer resident sensors can observe it compared to LEO, orbital periods and geometry make tracking and scheduling observations more constrained, and conjunction events may involve objects transiting between regimes.
Operationally, this drives a need for high-quality catalog maintenance, consistent screening, and coordinated maneuver decision-making to reduce uncertainty and protect availability.
For MEO missions, Look Up supports safer, faster operations through SYNAPSE, its SSA digital platform, which fuses multi-source tracking data (including external data) to maintain a coherent space picture across orbital regimes.
SYNAPSE delivers collision avoidance predictions with a 99.9% accuracy rate, provides actionable alerts, and supports risk management with tailored maneuver recommendations that account for mission constraints, via API or interface, with an on-premises deployment option for secure operations.
This helps GNSS and other MEO operators coordinate decisions, reduce screening workload, and protect high-value assets with scalable monitoring and analytics.
We deliver space situational awareness (SSA) and space domain awareness (SDA) solutions that help secure active satellites and ensure safe operations in the ever-growing expanse of space.