Dutch first in space technology: first data transmission via laser satellite communication

It worked! On 19 January, the experimental Dutch satellite instrument SmallCAT successfully connected to a ground station on Earth - via laser light. It is an important milestone for the Dutch space industry, which wants to market its laser satellite communication technology worldwide.

The Norwegian satellite Norsat-TD (Image: NOSA)
SmallCAT (Small Communication Active Terminal) is an innovative satellite instrument developed by TNO, supported by the Ministry of Defense and NSO from the ESA ARTES program. The instrument was launched in April 2023 aboard the Norwegian satellite Norsat-TD Since then, TNO has been working towards the first laser data connection between the satellite and a ground-based receiving station.

The ground station to which connection was made is at TNO in The Hague. The equipment needed to connect to SmallCat was made by TNO and Airbus Netherlands.
Establishing such a laser connection is not easy, says Bert Meijvogel, senior technology advisor at NSO: "SmallCAT flies at 28,000 kilometers per hour in a low orbit around the earth. You have to point a laser from the ground, connect, hold that connection and then send data back and forth. This only works with incredibly accurate equipment.'

Ground station Telescope in The Hague (Image: TNO)
Why laser?

Communication via laser light has a number of advantages over the radio links that satellites currently use. Laser communication is faster, safer, the hardware is considerably lighter and sending data takes less energy. It is therfore an important and promising technology, which can also be widely applied in aviation, shipping, defense and other fields where fast, secure communication is important.

Tower on which the ground station stands (Image: TNO)
Right the first time

The Netherlands is now one of the forerunners in laser communication for satellites in low Earth orbit. Meijvogel: 'We worked on this step by step and at every moment the technology worked as we envisaged it. So it was first time right. This says something about the quality of Dutch space industry and it gives a lot of confidence in the further development of our technology for laser satellite communication.'

The Netherlands is betting big on the development of laser satellite technology, including with contributions from the Ministry of Economic Affairs and Climate's Space Budget and funding for the NEXTGEN HighTech program from the National Growth Fund. Knowledge institute TNO develops the experimental hardware, after which commercial parties such as Airbus Netherlands, AAC Hyperion and ViaSat Netherlands will market it worldwide. They will be supported by Dutch suppliers such as FSO, a joint venture of VDL and Demcon, for the high-quality components. Furthermore, a wider group of parties is involved, including: Celestia STS, Lionix, NLR, Effect Photonics and VTEC.

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