ECM J/S ratio (SSJ)

Name: ECM J/S ratio (SSJ)
Author: Randle C. Sink

LiveRandle C. Sink19 apps · 38K installsToolsFreecom.eeautocalc.ecmssj

For ECM, Calculate the J/S ratio for the self-screening jammer (SSJ) situation

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Total installs: 1,125
Installs / day: 0
Rating: —★
Released: 11 Mar 2015
Last update: 13 May 2015
Countries: —

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Daily tracking since 11 Oct 2026 · history grows every day

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Full description

For Electronic Counter Measures (ECM), this app is used to determine the jammer-to-signal (J/S) ratio. For a tracking radar, enter the power in kW, antenna gain in dB, and IF bandwidth in MHz. Then enter the aircraft cross sectional area in m^2 and the range in km, for a self-screening jammer on board with transmitter power in kW over a bandwidth in MHz and given antenna gain in dB at a distance from the radar in km For example, Enter Pt = 100, Gr = 35, Br = 1, A = 4, R = 3, Pj = 1, Bj = 20 and Gj = 10. Your values for J/S (SSJ) should be 16.5.

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