like to remind the result of $n=1.7$, derived by (Hancock S. et al., 1994) after a comparison of 1-year COBE and Tenerife data.

So we obtained the estimate of $n$ more precise and somewhat higher than it is derived by other investigators.

To the best of our knowledge, nobody has investigated the COBE noise (A–B) maps in detail. Gorski et al. (1994) used only the mean noise parameters assumed they are normal. Wright et al. (1994b) used the noise spectrum, but the used basis was not complete orthogonal. Bennett et al. (1994) worked by the help of a correlation function but only on the part of the sphere. In the latter two cases the basis function orthogonality is lost and it is impossible to analyze noise spectrum in detail.

The next result we obtained and that differs from previously published is the rejection of the trivial (with $n=1$) Harrison-Zel’dovich spectrum on the confidence level of 99%.

As a result there are very unlikely the models with high $\Lambda$–term and a more probable are the open models with $\Omega <1$, if we assume the initial density perturbations are determined by the power law index $n=1$ (Kamionkowski M., Spergel D.N., 1994). Our 