Wide range of high-speed baseband modems

for Telemetry, Tracking and Command (TT&C), Earth Observation and Uplink Stations (ULS) for Galileo stations. Best in class Optical digital converter (ODC) for optical communications.

Modems for TT&C, Earth Observation and Galileo Uplink Stations (ULS)

for operational ground stations, providing reliable and flexible communication between the Satellite Control Centre (SCC) and – via the station RF section – the satellite, but also for EGSE configurations. Using FPGA based signal processing to provide real time modulation, demodulation and radiometric processing with software that allows the system to be used locally via the system GUI or remotely via LAN.

Software Defined Radio (SDR) platform that allows direct sampling and direct synthesis from 70 MHz up to X-band. It is a digital front end for use as part of low, medium, and geostationary earth orbit (LEO/MEO/GEO) satellite ground stations.

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Optical digital converter (ODC) provides reception and processing functionality of digital bitstreams output by free-space optical (FSO) receiver modules, capable of receiving data rates of up to 10Gbps.

The ODC is ideal for use in FSO terminals, optical communication ground stations and experimental set-ups for optical communications.

Baseband modems Products & Services


Wide product portfolio of baseband modems for TT&C, Earth Observation, ULS – Galileo, and unique Optical modems.

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Our companies

Our group companies operate across the globe but share a common purpose. Together, we exist to lead the continuous search for cutting-edge solutions with reliable, affordable, European made high technology.

  • We provide cutting-edge radiofrequency, antenna and ground stations solutions for satellite communications based on the most advanced technologies, with an extensive portfolio of products and services tailored for broadcast, aerospace, radioastronomy, deep space, science, government and security customers. With over 25 years of specialist experience, a100-strong team based in Spain and a wide range of collaborators elsewhere, we are a highly technological, innovative engineering company meeting the technology needs of our customers around the world.

    WEBSITE https://www.ttinorte.es/ N.01 Read more
  • We are experts on end-to-end digital transformation solutions based on IoT technology, a highly qualified engineering team with strong expertise in electronics design, sensors integration, wireless communications and IoT platform and applications. With more than 15 years within the IoT ecosystem, we have extensive experience in the design, manufacture and commercialisation of IoT custom products, meeting the most demanding requirements of customers in the markets of industry 4.0, agrifood and smart metering. We are our customers’ technology partner making their ideas a reality.

    WEBSITE https://tst-sistemas.com/en/ N.02 Read more
  • For over 25 years, we have been creating advanced high-performance front-end solutions for ground station manufacturers and operators that enhance the performance of radio antennas large and small.


    Working with international space agencies, radioastronomy and defence customers, our offer includes the design and manufacture of ambient and cryogenic Low Noise Amplifiers to boost G/T, Cryogenic engineering and design services as well as RF integration and consultancy.

    WEBSITE https://www.callisto-space.com/en/ N.03 Read more
  • We provide ground-based solutions in the domains of satellite simulation, testing, communication and data processing. We have more than 30 years of experience in the space industry, supplying satellite test, simulation and RF/Optical modem equipment. We have delivered over 350 EGSEs and modems to space agencies, large system integrators and specialised flight-equipment manufacturers and operators around the world. Our EGSE solutions have been used in more than 80% of all European Space Agency missions.

    WEBSITE https://celestia-sts.com/ N.04 Read more
  • We pioneer innovative technical solutions tackling complex challenges in very high throughput satcoms for the communications, earth observation, PNT(positioning, navigation and timing) and TT&C markets. Leaders in electronic scanning antennas systems, our expertise encompasses antenna design, phased arrays, satcom gateways, RF, digital signal processing, comprehensive system design, and specialised software for satellite and terrestrial communication systems. We emphasise technical superiority and cost-efficiency, focussing on satellite communications, 5G and position navigation and timing sectors.

    WEBSITE https://www.celestia-uk.com/ N.05 Read more
  • With over 60 years’ experience in the space sector, we provide solutions in full turnkey Earth Observation or TT&C ground stations. Solutions are built on proven expertise in satellite communications and our own high-end product range of Earth Observation and TT&C modems in combination with wide band digitisers. We also develop turnkey projects involving payload and TT& C satellite test benches (EGSE, SCOE), providing systems to test the complete RF chain of the satellite before it is launched in orbit.

    WEBSITE https://www.celestia-antwerp.be/ N.06 Read more

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