Constellation Tracker

The largest satellite constellation ever deployed, Starlink provides broadband internet service to over 4 million subscribers across 100+ countries. Gen2 satellites feature direct-to-cell capabilities and inter-satellite laser links for global mesh networking.

A near-polar LEO broadband constellation providing global coverage including Arctic regions. Merged with Eutelsat in 2023, combining GEO and LEO capabilities. Focuses on enterprise, government, maritime, and aviation markets via partner ground terminals.

Amazon's LEO broadband mega-constellation aims to provide affordable high-speed internet globally. First two prototype satellites (KuiperSat-1 and KuiperSat-2) launched October 2023. Production launches contracted with ULA Vulcan, Arianespace Ariane 6, and Blue Origin New Glenn.

The only satellite constellation providing true pole-to-pole voice and data coverage. Iridium NEXT replaced the original 1990s constellation with 75 modern satellites featuring Iridium Certus broadband (up to 700 kbps), ADS-B aircraft surveillance (Aireon), AIS ship tracking, and IoT services. Critical for aviation, maritime, military, and emergency communications.

Globalstar provides satellite voice, data, and IoT services with coverage focused on mid-latitudes. Partnered with Apple for Emergency SOS via Satellite on iPhone (using Band n53 / 2.4 GHz). Planning next-generation constellation to expand capacity and support direct-to-device services.

SES O3b mPOWER is a second-generation MEO constellation providing high-throughput, low-latency broadband services. Each satellite generates over 5,000 fully shapeable beams delivering terabits of throughput. Targets enterprise, government, cruise, and telecom backhaul markets with fiber-like performance in underserved regions.

Telesat Lightspeed is a planned LEO constellation designed for enterprise-grade connectivity. Features advanced laser inter-satellite links and a software-defined networking architecture enabling dynamic capacity allocation. Targeting government, maritime, aviation, telecom backhaul, and enterprise markets. MDA selected as prime contractor (2024 restructured contract).

The SDA Transport Layer is a military mesh network providing low-latency, jam-resistant data connectivity for the US Department of Defense. Features optical inter-satellite links enabling beyond-line-of-sight targeting and missile tracking data relay. Tranche 0 (28 satellites) operational; Tranche 1 adds ~150 satellites. Integrates with the Tracking Layer for missile defense.

The Global Positioning System provides worldwide navigation, positioning, and timing services. GPS III satellites feature improved accuracy (L5 civil signal), enhanced anti-jamming capabilities (M-code military signal), and longer operational lifespans. Backbone of global navigation and critical infrastructure timing. 31 operational satellites in 6 orbital planes.

The European Union's global navigation satellite system provides independent positioning, navigation, and timing services. Features the High Accuracy Service (HAS) delivering 20 cm precision, Search and Rescue (SAR) return-link capability, and the Commercial Authentication Service. Second-generation Galileo satellites will add inter-satellite links and enhanced signals.

China's global navigation satellite system achieved full operational capability in June 2020 with 35 satellites in a hybrid MEO/GEO/IGSO architecture. Provides open, authorized, and precise positioning services globally, with enhanced regional services in Asia-Pacific via GEO and IGSO satellites. Unique short message communication capability enables two-way messaging.

Russia's global navigation satellite system operates 24 satellites across 3 orbital planes. The higher inclination (64.8 degrees) provides better coverage at northern latitudes compared to GPS. GLONASS-K2 modernization adds CDMA signals for improved interoperability with GPS and Galileo. System accuracy approximately 2.8 meters with SDCM augmentation.

Planet operates the largest Earth observation constellation, imaging the entire landmass of Earth daily at 3-5 meter resolution (SuperDove) and up to 50 cm resolution (SkySat). Serves agriculture, forestry, disaster response, defense, and climate monitoring markets. Data accessed via Planet Platform API with AI-ready analytics.

Spire operates a multi-purpose CubeSat constellation collecting global weather data (GNSS radio occultation), maritime vessel tracking (AIS), aircraft surveillance (ADS-B), and RF analytics. Provides Space-as-a-Service platform allowing customers to deploy custom payloads. Serves NOAA, ESA, and commercial weather forecasting companies.

BlackSky provides high-revisit, high-resolution (1 meter) satellite imagery with AI-powered analytics. Spectre AI platform fuses satellite imagery with global data sources for real-time intelligence. Focus on defense, intelligence, and commercial geospatial analytics. Dawn-to-dusk and mid-inclination orbits enable frequent revisit over key areas of interest.