Satellite mission operators face a dual challenge: keeping telemetry fast and actionable while maintaining strict control over sensitive data subject to ITAR and data residency requirements. Data sprawl across disconnected dashboards, logs, and analytics tools slows anomaly response and complicates compliance reviews. InfluxDB 3 addresses this by centralizing spacecraft, ground system, and infrastructure telemetry into a unified time series architecture. Teams can ingest data via Telegraf agents or MQTT pipelines, query across systems without exporting data, and deploy on-premises or in private cloud environments to satisfy data sovereignty requirements. The Eutelsat OneWeb case study illustrates the approach at scale: 600+ LEO satellites generating over 1 million data points per second, managed through InfluxDB, Telegraf, and Grafana for real-time monitoring and root-cause analysis.