Results of Updating the Parameters of the Space Debris Model in 2007 and 2009

The updating of parameters of the Space Debris Prediction and Analysis Model (SDPA) is performed on the basis of matching the results of environment forecasting in the time interval from 1960 through 2009 with the data of real catalogue of space objects (SO). In the SDPA model, the intensity of increasing the number of catalogued SOs at various altitudes is used for modeling the evolution of small-size space debris (SD).It was found that the maximum density of SD of various sizes increased 2.3 - 2.6 times in 2009 as compared to 2003. This is mainly a consequence of destruction of the Chinese Fegun-1C satellite in January, 2007.