Next organizations support and take part in developing of the RadioAstron project.
- NRAO, USA
Low-noise amplifier in the band 18-25 GHz.
- Helsinki University of Technology, Finland
22 GHz on-board receiver was used for all tests of scientific equipment.
It was recently replaced by new Russian 18-25 GHz receiver
operating in a frequency switching mode.
- European Space Agency (ESA)
Nordwik test of SRT reflector petals in vacuum chamber.
Observatory of Newchatel,
Rubidium on-board frequency standards.
- Tata Institute for Fundamental Research (TIFR), India
327-MHz on-board low-noise amplifier.
- CSIRO, Australia
1665-MHz on-board receiver.