of the Galactic radiation allows to avoid the systematic errors mentioned above. In addition the proposed approach make it possible to analyze and to exclude more fine effects usually caused errors in spectrum parameters measurements. If an instrumental noise is normal the data censoring could not cause a significant difference between the spectral parameters derived from censored and non-censored data sets. Being detected the difference may be result from either neglected residual effects or a noise nonnormality. Being in the context of the normal distribution function we are forced to exclude the spectral components with an anomalous noise behavior.

The cosmological spectrum parameters we obtained differ in some degree from the parameters derived in previous works used the same initial COBE data. The difference is due to the anomalous noise harmonics exclusion rather than spatial–frequency Galactic radiation filtering. In its turn the harmonics exclusion is possible because of the harmonics orthogonality conservation.

A number of investigators (Table \[rez\]) announced the strange end result sensitivity to a quadrupole component. Most likely it is also attributed to anomalous noise harmonics influence.

The results based on 2-year COBE data and obtained by several authors are shown in Table \[rez\]. In addition we would 