A project coordinated by the Italian Space Agency

Launch opportunity provided by the European Space Agency

Latest Data


LEDSAT digipeater

Current status: ONLINE on alternate days beginning June 26th, 2023. Status changes at 00:00UTC each day. Follow us on twitter for real-time updates – S5Lab Twitter

A challenge will take place in the first two weeks of digipeater operations in collaboration with the European Space Agency. Check the article on the ESA’s website

The LEDSAT telecommunication subsystem has a digipeater functionality available to the radioamateur community. It can operate in real-time mode and in “store & forward” mode and requires an amateur radio station with:

  • Windows PC
  • Directional antenna (10 dBi at least recommended)
  • Audio connection between transceiver and PC

(Further details about interfaces and modulation in the archive below)

The satellite receives packets on 435.310MHz and transmits messages on 435.190MHz

The S5lab team of Sapienza provides the software needed to communicate with the satellite along with a technical guide of the setup and the GUI features. The following archive contains:

  • The user manual
  • The Graphical User Interface (GUI)
  • The Terminal Node Controller (TNC) software
  • The GNURadio script to receive and transmit

-> LEDSAT Digipeater package (1.5 MB – Free download, Last update 2023-06-23)

The digipeater has been developed in collaboration with AMSAT Italia, which the team thanks for their support


Participating Institutions: