The Space Network Ground Segment Sustainment (SGSS) project, led by General Dynamics Mission Systems, is modernizing NASA's Space Network infrastructure. As the prime contractor, General Dynamics is redesigning and upgrading critical ground stations to enhance efficiency, flexibility, and sustainability. The project focuses on the continuous support of NASA's Tracking and Data Relay Satellites (TDRS), enabling seamless communication between spacecraft and operators. By integrating advanced technology and eco-friendly solutions, SGSS ensures long-term support for NASA's missions, with an emphasis on reducing operational costs, improving system sustainability, and preparing for future mission needs.
The Mobile User Objective System (MUOS) is a state-of-the-art satellite communications network developed by General Dynamics Mission Systems for the U.S. Navy. It offers seamless, high-capacity voice and data communication for military personnel, even in remote and hostile environments. MUOS enhances connectivity with cell phone-like services, providing crystal-clear audio and a tenfold increase in communication capacity compared to the previous UHF system. The system operates through four global ground stations, ensuring worldwide coverage, including urban, mountainous, and Arctic regions. By replacing legacy systems, MUOS supports military operations with reliable, high-quality communications, even in the most challenging conditions.
The Explorer GPS Receiver by General Dynamics Mission Systems is a spaceborne navigation solution designed for optimal performance in Low Earth Orbit (LEO) and Geostationary Earth Orbit (GEO). Leveraging the reliable Viceroy® architecture with over 200 years of on-orbit heritage, this compact and robust receiver features 12 tracking channels, dual antenna capability, and advanced radiation-tolerant design. It offers precise position, velocity, and time data, with enhanced resolution and low signal acquisition. Weighing only 2.5 lbs and operating in extreme temperature ranges, it supports autonomous operations, making it ideal for a wide range of space missions.
Viceroy GPS Receiver gdmissionsystems.com/products/-/media/fe707597bf444268b6767a6a0114e3b7.ashx?h=358&w=600&hash=A3A5B99B3259D59E1ADC7B436523AE36 gdmissionsystems.com/products/communications/spaceborne-communications/spaceborne-gps-receivers/viceroy-gps-receiver "The Viceroy-4 GPS Receiver by General Dynamics Mission Systems is a high-performance spaceborne GPS solution designed for Low Earth Orbit (LEO) and Geostationary Earth Orbit (GEO) applications. With over 200 years of combined on-orbit performance and a heritage of 20 years in spaceflight, the receiver offers reliable position, velocity, and time data. Its architecture includes 12 tracking channels, dual-antenna capability, and enhanced radiation-hardened digital electronics. Supporting RS-422 and MIL-STD-1553 interfaces, the receiver ensures robust operation with features like autonomous cold-start mode, low signal acquisition, and integrated carrier phase tracking. Compact and lightweight, it operates at 20-35 VDC, making it ideal for demanding space missions.gdmissionsystems.com /products/communications/spaceborne-communications/spaceborne-gps-receivers/viceroy-gps-receiver Viceroy GPS Receiver - General Dynamics Mission Systems 4-5 minutes Viceroy GPS Reciver Superior positioning with 200+ years of on-orbit performance Design based on legacy space qualified digital design 20 years of trouble-free spaceflight heritage Same reliable position, velocity, time, pseudorange and carrier phase at 1Hz Same form-factor and interface control as heritage Viceroy receiver Features General Dynamics’ Viceroy-4 Global Positioning System (GPS) Spaceborne Receiver provides position, velocity, and time information for Low Earth Orbit (LEO) and Geostationary Earth Orbit (GEO) applications. Performance and satellite visibility are enhanced through the use of dual antennas; each of the 18 GPS channels can be assigned to either antenna. The design supports RS-422 or MILSTD-1553 bus interfaces. Space Qualified Digital Design Full Spaceborne Capability Autonomous Operation Pseudorange and Integrated Carrier Phase at One Second Rate One PPS Clock Output Synchronized to GPS Time Radiation Hardened Static RAM Up to 12 Receive Tracking Channels 53 Cubic Inches 2.4 Pounds 20 to 35 VDC Operation Improved Radiation Hardened Digital Electronics 12 Channels Support All-in-View Tracking Dual Antenna – Any Channel Assigned to Either Antenna (LEO only) Fast Cold Start Mode Simplifies Integration and Autonomous Operation Low Signal Acquisition and Tracking Supports GEO Sidelobe Tracking Enhanced Resolution 1 Pulse per Second Output Specifications Viceroy-4 GPS Receiver Data Sheet View Document Receiver Architecture 12 channels with enhanced fast acquisition Dual antenna – any channel to either antenna (LEO only) L1: 1575.42 MHz, C/A code Carrier-aided code tracking Based on legacy Viceroy architecture (hardware and software) Kalman filter or least squares solution Input/Output RS-422 serial I/O (standard) X.25 protocol with ECEF position, velocity, time, longitude, latitude, pseudorange, carrier phase One pulse per second (GPS, UTC, or Measurement Epoch Time) 9-pin male Sub-D for prime power 37-pin female Sub-D for command and telemetry SMA female connector for RF signal Solution Accuracy Autonomous Position: < 15 meters, 1 sigma (LEO) | < 100 meters, 1 sigma (GEO) Autonomous Velocity: < 0.1 meters/second, 1 sigma (LEO) | < 0.01 meters/second, 1 sigma (GEO) 1PPS time: < 100 ns, 1 sigma (typical) Time to First Fix LEO: 4 minutes, cold start GEO: 10 minutes, cold start Orbital Dynamics Altitude: approx 200 km to 2000 km (LEO) | approx 35,800 km (GEO) Velocity: up to 16,000 meters/second Acceleration: 1G Optional and Custom Features Single string or redundant configurations Precision internal reference Ovenized Crystal Oscillator (OCXO) External 10 MHz reference oscillator Time Strobe Input: < 100 ns, 1 sigma MEO and HEO Altitudes Physical/Environmental Size: 6.0” x 5.2” x 1.7” (152 x 132 x 43 mm) Weight: 2.4 lbs (1.1 kg) max DC Power: 8 W max; steady-state tracking (20-35 V) Vibration: 17 Grms Shock: 1750 G @ 500 Hz Temperature: -20°C to +60°C We use cookies to enhance your website experience. By continuing to visit this site, you agree to our use of cookies. Learn More"
General Dynamics Mission Systems provides a broad array of mobile satellite communication solutions, designed to ensure secure and reliable connectivity even in challenging environments. Their offerings include the Iridium 9575 Extreme Phone Kit, featuring a rugged handset with global coverage and a comprehensive range of accessories, as well as the Non-Secure Fly-Away Tactical 9505A kit, which includes rechargeable batteries, antennas, and solar charging options. The solutions are complemented by a variety of accessories such as portable auxiliary antennas, fixed mast antennas, and various cable kits, ensuring extended functionality and flexibility. Additional products include rechargeable batteries, solar chargers, DTCS systems, and installation training, supporting both military and commercial users worldwide in mission-critical applications.
The Global Broadcast Service Transportable Ground Receive Suite (GBS TGRS) by General Dynamics Mission Systems is a versatile, portable solution for receiving and processing high-bandwidth broadcast data and video from Ka-band or Ku-band SATCOM systems. Designed for both classified and unclassified streams, this system features a compact, modular design with a One-Way Antenna (OWA) and a Receive Broadcast Manager (RBM) for local data processing and secure distribution. The GBS TGRS supports seamless network integration via IP-based connections and ensures cost efficiency through the use of Commercial Off-The-Shelf (COTS) technology, which also allows for remote upgrades. Ideal for rapid deployment, the system enables simultaneous processing of two broadcast carriers and offers secure data decryption for classified transmissions.
The Landsat Mission, managed by General Dynamics Mission Systems in collaboration with NASA and the USGS, plays a pivotal role in Earth observation and deep space exploration. With over 28 years of experience, General Dynamics operates the Landsat 8 and 9 satellites, ensuring continuous, reliable satellite operations for monitoring agriculture, geology, forestry, and global changes. The company built the advanced Landsat Multi-Satellite Operations Center (LMOC) to manage both missions, providing essential data for environmental research, emergency response, and disaster relief. The Landsat program has been a vital resource for governments, educational institutions, and industries worldwide, offering unparalleled remote sensing data since 1966.
General Dynamics Mission Systems provides advanced Space Operations & Engineering Services, offering a comprehensive range of solutions for spacecraft systems engineering, mission planning, ground system management, and communication network services. With decades of experience, the company supports high-profile clients such as NASA, the U.S. Air Force, and commercial entities. Their contributions include landmark missions like the James Webb Space Telescope, OSIRIS-REx asteroid sample return, and the Landsat Earth observation program. Known for delivering reliable satellite communications, secure GPS systems, and mission-critical ground systems, General Dynamics ensures efficient operations in complex space environments. For more information, visit [here](gdmissionsystems.com/services/space-operations-and-engineering-services).
The Space Ground Link Subsystem (SGLS) TT&C Transponder by General Dynamics Mission Systems is a fully aerospace TOR-compliant, radiation-hardened S-Band transponder designed for reliable operation in Medium Earth Orbit (MEO) and strategic nuclear environments. It supports uplink command rates of 1-2 kbps, downlink telemetry up to 32 kbps, and offers coherent operation with ranging capabilities. Equipped with robust security features, including KG-327 cryptographic unit interfaces for secure uplink decryption and downlink encryption, this transponder is built to meet strict aerospace standards, ensuring minimal integration risks and lifecycle costs. Customization options are available to meet specific requirements.
The Small Deep Space Transponder (SDST) by General Dynamics Mission Systems is a high-reliability communication system designed for deep space exploration, fully compatible with NASA's Deep Space Network (DSN). It operates on X-band and Ka-band frequencies, offering low noise and high sensitivity for robust data transmission in extreme environments. Featuring MIL-STD-1553 interfaces and redundant I/O for cross-strapping, it supports missions such as Mars rovers and asteroid studies. The SDST is compact, lightweight, and integrates with power amplifiers, providing advanced telemetry, command, and synchronization capabilities for spacecraft. It is radiation-resistant, SEU-tolerant, and operates under harsh launch environments, making it ideal for critical space missions.
The Sentinel M-Code GPS Receiver by General Dynamics Mission Systems is a cutting-edge spaceborne navigation system designed to provide reliable Position, Navigation, and Timing (PNT) in contested environments. Equipped with 64 channels supporting L1, L2, C/A, P(Y), and modernized M-Code signals, it offers high accuracy with autonomous position and velocity measurements. This receiver is built for harsh space conditions and is qualified for Low Earth Orbit (LEO) and Geostationary Orbit (GEO) operations, with options for Medium Earth Orbit (MEO) and Highly Elliptical Orbit (HEO). The system includes advanced anti-jam and anti-spoof technologies, ensuring superior performance in GPS-denied environments, along with relative navigation capabilities for co-orbiting spacecraft. The rugged design and precise time stamping make it a reliable solution for military and aerospace applications.
Fully interoperable with MILSATCOM Ka-band networks, our HCP steerable beams allow authorized military users to access our wideband capacity as part of their own independent network.
Modern enterprise demands connectivity – even in remote, challenging, and hostile places. Viasat Enterprise is satcom without compromise for organizations that drive the world’s production and supply chains.
