Aerospace Instrument-Making Annotation << Back Forecasting the Technical Condition of Phased Ahtenna Arrays in Case of Damage in the Process of Functioning of Spacecraft Abdurakhimov A.A., Roshchin G.B. This article analyzes the mechanisms of changing the properties of phased antenna arrays of onboard radio engineering systems of spacecraft as a result of accidental exposure to adverse factors of outer space. Mathematical models have been developed to evaluate changes in the parameters of the operation of phased array antennas over the long life of spacecraft/ The fi elds of application of the developed models are determined, and the results of numerical modeling are presented. The regularities of changing the properties of antenna arrays when their elements are damaged are formulated. Keywords: phased array antennas, adverse factors of space fl ight-wanderings, parameters of functioning, mathematical model of functioning. DOI: 10.25791/aviakosmos.3.2025.1466 Pp. 15-24.