CMB anisotropy testing from small satellites

Abstract We review the advantages and possibilities of small satellites. New results of data reduction of the satellite-borne experiment RELICT-1 are presented. For the inflation spectrum of primordial perturbations we obtained the estimate for quadrupole component 6·10 −6 2 /T −6 . The RELICT-2 mission will provide a possibility of measurement of CBR anisotropy down to the level less thanΔT 2 /T= 10 −8 . We present the results of engineering testing of RELICT-2 measurement system and discuss ways of improving of the radiometers sensitivities.