A software for combined processing of different space geodetic observations is developed along with the work on the co-location of various observational techniques at the observatories of «Quasar» VLBI network. The software realizes the combination of standardized SINEX-files and works in the following two modes: 1) a combined solution within one observational technique on the appointed time interval; 2) an inter-technique combination of SINEX files. A special task-forming language has been constructed on the basis of the same formalism used in the description of SINEX-files format. The main features of developed software are presented. Various aspects of the combined processing of different types of space geodetic observations are also discussed.