The CORONAS satellite, launched on 1994 March 2, carried the DIFOS exp
eriment to observe irradiance fluctuations due to global solar oscilla
tions. The DIFOS experiment was working for almost 50 days near solar
activity minimum. We present first results of the Fourier analysis of
the full time series. The fine structure of the low-l p-modes is shown
and fitted with Lorentzian line profiles. Results of the wavelet anal
ysis show strong variations of the p-modes in time.