Ground Systems Companies

L3Harris Technologies

Melbourne, United States commercial

In 2026 L3Harris sold a controlling stake in its Space Propulsion and Power Systems business (most of the former Aerojet Rocketdyne) to AE Industrial Partners, keeping the RS-25 engine and a minority holding; Sam Mehta became President and CEO on 17 August 2026. L3Harris Technologies is a global aerospace and defense technology company operating as "The Trusted Disruptor" across air, land, sea, space, and cyber domains. With over $21 billion in annual revenue and operations in more than 100 countries, L3Harris delivers mission-critical solutions across four strategic business segments with the speed, passion, and determination that government and commercial customers demand. In the space domain, L3Harris provides comprehensive capabilities spanning satellite systems, ground infrastructure, and mission operations. The company manufactures solid rocket motors at scale to power defense and launch applications. L3Harris supports NOAA's weather satellite programs, including next-generation imaging technology for the GeoXO satellite system, advancing weather monitoring and climate observation capabilities for disaster preparedness and environmental research. The company contributes critical components to NASA's Artemis program, including the Orion Main Engine supporting crewed lunar missions. L3Harris space ground systems enable satellite command, control, and data processing for military, intelligence, and civil customers. Their responsive space capabilities deliver rapid solutions for emerging national security requirements. L3Harris emphasizes multi-domain integration, connecting space assets with terrestrial networks for comprehensive situational awareness. The company's imaging and sensor systems provide critical Earth observation data, while protected communications satellites ensure resilient connectivity for defense operations. With deep expertise in electro-optical sensors, space-based infrared systems, and ground processing, L3Harris delivers end-to-end space mission capabilities. Their acquisition of companies like Aerojet Rocketdyne further expands propulsion and space access capabilities, positioning L3Harris as a premier space technology provider.

Kratos Defense

San Diego, United States commercial

Kratos Defense & Security Solutions, Inc., founded in 1994 and headquartered in San Diego, California, is a technology company focused on the defense and aerospace industries. The company specializes in providing critical infrastructure and technology solutions, primarily centered around satellite ground systems and radio frequency (RF) products. While specific product details are limited based on available information, Kratos appears to operate within the essential network that supports space-based communications and operations. Kratos’ core capabilities lie in the development and provision of the ground-based infrastructure necessary for satellite command, control, and communications. This includes technologies for signal processing, data handling, and network management. The focus on RF products suggests expertise in the design and manufacturing of components and systems operating within the radio frequency spectrum, likely crucial for both satellite uplinks/downlinks and broader defense applications. As a company established in 1994, Kratos has been a long-standing player in the defense sector, though publicly available information regarding specific missions, achievements, or key customers is currently limited. Their longevity suggests a proven ability to navigate the complexities of government contracting and maintain relevance within a demanding industry. Kratos’ value proposition centers on providing reliable and secure ground infrastructure for satellite operations, a critical component for both commercial and government space activities. By focusing on these foundational elements, Kratos positions itself as a key enabler of space-based capabilities, supporting a range of applications from communications and Earth observation to national security.

Comtech Telecommunications

Chandler, United States commercial

Comtech Telecommunications is a leading provider of satellite communications technology, delivering mission-critical ground station equipment, modems, amplifiers, and network infrastructure supporting military missions, critical infrastructure, and everyday connectivity across the globe. The company specializes in resilient, secure, all-domain communications solutions for government and commercial satellite operations. In September 2024, Comtech launched the Digital Common Ground (DCG) portfolio of modems designed to enable the U.S. Department of Defense and coalition partners to transition to digitized, hybrid satellite network architectures. The DCG modems represent one of the first product lines with access to multi-orbit capabilities across commercial and purpose-built networks, being among the first modem lines compliant with Digital Intermediate Frequency Interoperability (DIFI) standards. These modems allow customers to switch between Geostationary Orbit (GEO), military satellite communications, Medium-Earth Orbit (MEO), and Low-Earth Orbit (LEO) networks on a single reconfigurable platform. Comtech offers award-winning bandwidth-efficient satellite modems featuring advanced technologies supporting applications including mobile backhaul, government communications, premium enterprise, and mobility markets. The company's WGS Modem received certification to operate on the O3b mPOWER satellite constellation, demonstrating compatibility with next-generation MEO systems. As a leading supplier of satellite communications uplink power amplifiers and frequency converter solutions, Comtech delivers high-efficiency HPA technology for airborne satcom systems alongside solid-state power amplifiers and BUCs. The company provides comprehensive satellite earth station solutions, VSAT technology, and troposcatter systems. Headquartered in Chandler, Arizona, Comtech continues advancing satellite communications technology to meet evolving connectivity requirements worldwide.

NEC Space Technologies

Fuchu, Japan commercial

NEC Space Technologies is the space systems division of NEC Corporation (Nippon Electric Company, Tokyo, founded 1899), Japan's largest information and communications technology conglomerate with annual revenues exceeding $25 billion. Within NEC's broad portfolio of IT services, enterprise software, and semiconductor products, the space division serves as a systems integrator and technology supplier for JAXA satellites, ground control infrastructure, and space communications equipment. NEC's most celebrated space achievement is its critical role in the Hayabusa asteroid sample return missions. For Hayabusa (launched 2003), NEC developed the spacecraft's ion engine system (the NSTAR-heritage IES microwave ion engines), guidance, navigation, and control systems, and communication hardware — systems that survived two years of interplanetary cruise, a harrowing landing and sample collection on asteroid Itokawa, and a desperate return journey that required improvising after multiple system failures before delivering Japan's first asteroid samples in June 2010. For Hayabusa2 (launched 2014), NEC again supplied propulsion electronics, navigation systems, and contributed to the impactor (SCI — Small Carry-on Impactor) mechanism that created an artificial crater on C-type asteroid Ryugu for subsurface sampling — the first ever such experiment. Hayabusa2 returned organic-rich carbonaceous samples including amino acid precursors in December 2020, a breakthrough for astrobiology. Beyond planetary missions, NEC Space Technologies has served as prime contractor or major systems integrator for multiple JAXA Earth observation satellites. The ALOS (Advanced Land Observing Satellite / Daichi) series — a 4-tonne L-band SAR + optical imaging platform — used NEC-led systems integration. MTSAT (Multi-functional Transport Satellite) geostationary weather and aviation satellites used NEC bus platforms. NEC also develops Japan's Quasi-Zenith Satellite System (QZSS) components — the 4-satellite GNSS augmentation constellation providing centimeter-level positioning across Japan — and ground systems for JAXA mission control and satellite command/data handling. Competitor Mitsubishi Electric (MELCO) is the other dominant Japanese satellite manufacturer prime.

General Dynamics Space & Mission Systems

Scottsdale, United States defense contractor

General Dynamics Mission Systems is a major defense contractor with significant space operations. The company builds ground systems for satellite constellations, secure communications systems for military space operations, and space-qualified electronics. General Dynamics provides command and control systems for the US Space Force, processes satellite data for intelligence agencies, and manufactures radiation-hardened electronics for space applications. The company also supports the Space Development Agency's proliferated LEO constellation program.

Kratos Defense Space

San Diego, United States commercial

Kratos Defense Space is the satellite ground systems and communications division of Kratos Defense & Security Solutions (Nasdaq: KTOS). The division provides satellite command and control software (QuantumGS virtual ground systems), signal processing hardware (RT Logic signal generators and analyzers), and enterprise ground architecture for commercial and government satellite operators. Kratos' ground systems process signals for hundreds of satellites across multiple orbits and are deployed at military satellite operations centers, commercial teleports, and civilian ground stations worldwide. The company is a leading vendor to the US Space Force for enterprise ground architecture that will manage the proliferated LEO satellite constellations being deployed under Space Development Agency programs. Kratos' RF products are also used in electronic warfare testing, radar, and 5G testing applications.

Gilat Satellite Networks

Petah Tikva, Israel commercial

Gilat Satellite Networks (NASDAQ: GILT, TASE: GILT) is a pioneering Israeli company that has spent over 35 years developing satellite-based broadband communications solutions that connect people and businesses worldwide. Headquartered in Petah Tikva, Israel, Gilat has established itself as a global leader in satellite networking technology, creating systems that power communications for enterprises, governments, and individuals across GEO, MEO, and LEO satellite constellations. The company's technology portfolio addresses the full spectrum of satellite communications needs, from ground infrastructure to user terminals. Their flagship SkyEdge IV platform represents their next-generation multi-service architecture, designed to work seamlessly across multiple satellite orbits with software-defined capabilities. This platform supports everything from remote connectivity and cellular backhaul to mobility services and government communications. Gilat's Gateway Solid State Power Amplifiers (SSPAs) have become essential components for LEO constellation operators worldwide. In recent years, Gilat has secured substantial contracts supporting the LEO constellation revolution. In 2024, the company won approximately $15 million in orders from major satellite operators for GEO, MEO, and LEO constellation solutions, along with multimillion-dollar defense contracts for advanced satellite connectivity. Their technology enables faster data transmission and enhanced performance compared to traditional geostationary systems, making them particularly valuable for broadband internet, disaster recovery, and IoT applications.

Mitsubishi Electric Space

Tokyo, Japan commercial

Mitsubishi Electric Corporation's Space Systems division (commonly known in the industry as MELCO Space), headquartered in Tokyo and part of the Mitsubishi Electric Corporation founded in 1921, is Japan's largest satellite manufacturer and a critical component of Japan's space industrial base — producing Earth observation, communications, and navigation satellites for JAXA, the Japanese government, and international customers. MELCO's Earth observation satellite portfolio is anchored by the ALOS (Advanced Land Observing Satellite) series for JAXA: ALOS-1 'Daichi' (launched 2006) combined PRISM panchromatic stereo imaging at 2.5m, AVNIR-2 multispectral at 10m, and PALSAR L-band SAR to create Japan's most capable remote sensing satellite to that date; ALOS-2 'Daichi-2' (2014) carries the upgraded PALSAR-2 L-band SAR providing 1-3 meter high resolution SAR imagery for disaster monitoring, deforestation detection, and agriculture; and ALOS-3 (planned for optical VHR imagery) and ALOS-4 (L-band SAR) continue the program. ALOS satellites have been particularly important for disaster response across Asia-Pacific, with PALSAR providing all-weather, day-night SAR coverage during typhoon flooding, earthquake damage assessment, and volcanic activity monitoring. MELCO is the prime contractor and manufacturer for Japan's Quasi-Zenith Satellite System (QZSS) — a regional navigation constellation completed as seven satellites in August 2026 after the planned QZS-5 was lost in the December 2025 H3 launch failure providing GPS augmentation and independent positioning for Japan and the Asia-Pacific region. QZSS uses Michibiki satellites in quasi-zenith orbits that remain nearly overhead Japan for extended periods, improving GPS availability in urban canyons and mountainous terrain where buildings and mountains block low-elevation GPS satellites. MELCO also manufactures commercial GEO communications satellites for international operators and supplies satellite components — solar arrays, thermal control panels, and attitude control systems — to other satellite manufacturers. MELCO competes globally with Boeing Satellite Systems, Thales Alenia Space, and Airbus Defence & Space for commercial GEO contracts.

CACI International Space

Reston, United States commercial

CACI International is a leading provider of mission-critical space solutions, delivering advanced signals intelligence, optical communications, and satellite systems for national security and intelligence community customers. The company leverages world-class digital signal processing techniques and emerging technologies including generative AI to provide enhanced SIGINT capabilities for unprecedented space domain awareness and decision dominance. CACI develops and operates fixed and deployable solutions providing custom signal processing systems from front-end collection to operator visualization, enabling rapid sensing, deterrence, and countering of adversarial threats. The company's CrossBeam free-space optical terminals successfully demonstrated space-to-space optical communications links in low-Earth orbit as part of the DARPA and Space Development Agency Mandrake II program, with terminals supporting successful high-speed communication link demonstrations over three and half years in orbit. Through a five-year cooperative research development agreement with the U.S. Army Space and Missile Defense Technical Center, CACI advances payload technologies, space sensor applications, and resilient Positioning, Navigation, and Timing (PNT) capabilities. The company's demonstration satellite tests multi-mission payloads including software-defined applications enabling precise, resilient PNT and tactical signals intelligence while in low-Earth orbit. CACI's time-focused PNT payload demonstrates GPS-independent earth-space time synchronization exceeding current performance by 100 times, producing high-precision geolocation solutions for proliferated LEO constellations while contributing to GPS resiliency in denied or degraded environments. The tactical ISR payload demonstrates collection, geolocation, demodulation, and decoding of digital mobile radio signals from orbit. With over two decades of experience integrating and operating complex end-to-end collection, processing, and space domain awareness systems, CACI continues advancing space-based intelligence capabilities.