Executive Summary
- LEO networks deliver round-trip latency of roughly 20–50 ms, while GEO systems often exceed 480 ms, shaping architecture choices for real-time applications, according to performance analyses and orbital physics references (Ookla analysis; ITU).
- Deployments continue to emphasize multi-orbit and multi-vendor strategies, with networks such as SpaceX Starlink, Amazon Project Kuiper (authorized for up to 3,236 satellites), and OneWeb (planned 648 LEO satellites) providing complementary coverage and performance (FCC authorization).
- Ground segment-as-a-service and cloud-native pipelines compress time to first data; for example, AWS Ground Station pricing is published on a per-minute basis, enabling predictable downlink cost modeling and rapid integration with AWS analytics tools (AWS Ground Station).
- Standards like CCSDS for communications and OGC’s STAC for geospatial data catalogs reduce integration risk, supporting interoperability across satellites, ground stations, and analytics stacks (CCSDS; OGC STAC).
How Space Systems Actually Work
Every satellite service rides a three-part stack: space segment, ground segment, and user segment. The spacecraft bus provides power, thermal control, and propulsion while the payload handles mission data; telemetry, tracking, and command (TT&C) maintain health and orbit control. Signal paths typically use S-band for TT&C and X/Ka/Ku bands for payload data, with the ground segment handling antenna scheduling, downlink, and routing into terrestrial networks (NASA SCaN overview; ITU satellite basics).
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