Dual Frequency Radio Transmitter

      The onboard RBE-150/400 ("MAYAK") transmitter is designed for high-precision measurements of space-time distribution of the electron concentration structures above the sensitive regions as predicted by the orbital transionosferic sounding.


Radio tomography of equatorial regions of the ionosphere
obtained by processing signals from the NNSS ("Transit") satellites


Thin layers over the ionospheric F2 layer (MAYAK + TEC)