Aircraft altitude used for atmospheric pressure determination

This paper is focused on possible method which could be used for determination of current atmospheric pressure condition in skyways. To gather suitable information it can be used electronic intelligence (ELINT). For instance passive systems working on the Time Difference Of Arrival (TDOA) method. Such a TDOA system is able to provide height data from four different sources. In terms of Barometric Formula knowledge the atmospheric pressure in located aircraft position can be derived. The atmospheric pressure determination depends on altitude measuring accuracy. The critical part of method is an extraction of profitable data from TDOA system.