not good enough and the accuracy of the estimation is determined by the instrumental noise. We are pinning our hopes on the “Relict-2” space experiment. “Relict-2” instrument is preparing now, it has an order better sensitivity than COBE has, and it will give the possibility to analyze the Galactic spectral index radiation with high reliability and so to separate the cosmological signal from the Galactic radiation with high accuracy.

Results
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As a result of the analysis we obtained the spatial spectrum parameters estimates under the assumption that Galactic radiation is one-component. For the quadrupole we found: $$Q_2=15.22 \pm 3.0  \mu{\rm K}$$ and for the power spectrum index: $$n=1.84 \pm 0.29$$ We analyzed spectral components from $l_{min}=2$ to $l_{max}=22$ if $m\ne 0$ for $l=2k$, and $m\ne 1$ for $l=2k+1$, and (due to the noise anomalies) if $l \ne 7,9,13$.

The accuracy of the obtained parameters is derived using Monte-Carlo simulation. For all estimates we show RMS errors. The procedures of difference and sum maps producing and of noise parameters determining are included in the Monte-Carlo simulation. The simulation also takes into account the noise, its variations, and a cosmic variance.

We find the total power measured in chosen spatial frequency 