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Get ECM J/S ratio (SOJ) old version APK for Android
Electronic Counter Measures (ECM) calculates J/S ration for SOJ situation...
For ECM, this app is to calculate the J/S ratio for the stand-off jammer (SOJ) situation. In this case, the jammer is at a different location than the target. While the target is in the main beam of the radar antenna, the jammer radiates power into the sidelobes. As an example, 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.
Next, for a 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 and a sidelobe in dB level for the radar antenna.
For example, Enter Pt = 100, Gr = 35, Br = 1, A = 4, R = 3, Pj = 1, Bj = 20, Gj = 10, Rj = 10, & SL = 20. Your value for J/S (SOJ) should be -14.0 dB.
Last updated on Dec 14, 2015
Minor bug fixes and improvements. Install or update to the newest version to check it out!
Uploaded by
Muhammad Nabbah
Requires Android
Android 2.2+
Category
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ECM J/S ratio (SOJ)
1.0 by Randle C. Sink
Dec 14, 2015