In present paper we offered the new way of coordinates estimation of the air target in the multiitem observation system «navigation satellites - the air target - the ground receiver». This way is based on the different-distance method of the navigation task solution in the receiver of Global navigating satellite system. The executed imitating modelling showed, that the accuracy of the air target site estimation, obtained by the ground receiver with use of the offered way, is less than 20 metres. This accuracy is commensurable with accuracy of an estimation of own coordinates of the receiver.