LEONSEGS: Ground Segment as a Service and Cross Mission Planning for SmallSat Operations

This presentation provides a concise technical briefing with a short demo of the Large Earth Observation New Space Ecosystem Ground Segment (LEONSEGS) project to solicit constructive peer feedback and engage potential adopters.
LEONSEGS is a federated ground segment platform that combines Ground Segment as a Service with multi mission planning and semantic archive retrieval to execute end to end satellite operations and Earth Observation (EO) product generation across heterogeneous missions and external EO catalogues. The architecture integrates a mission operations and processing stack that includes flight dynamics, mission planning, mission control, orchestration and payload data processing, together with an automated EO service layer for request handling, multi mission planning, semantic discovery and multi mission EO product generation.
At system level, operations and EO service delivery are jointly realised by Mission Operations Control and Processing Service (MOCPS) and Automated Multi mission Earth Observation Service (AMEOS) segments. The former turns user intent into executable plans, schedules ground contacts, commands and monitors spacecraft, and brings payload data to ground and into the processing chain. The latter captures and brokers requests, selects missions and data from internal and external catalogues through semantic discovery, and assembles the resulting EO products. The two segments exchange plans, events, telemetry summaries and product metadata through consistent interface contracts and shared data models aligned with community standards, including STAC and OGC APIs for catalogues and product descriptions, and CCSDS recommendations for planning, control and telemetry. This standardised approach enables straightforward integration with third party missions and ground station providers, supports automation across planning and execution, and ensures portability across platforms.