ECM: SSJ & SOJ

Name: ECM: SSJ & SOJ
Author: Randle C. Sink

LiveRandle C. Sink19 apps · 38K installsProductivityFreecom.eeautocalc.ecm

Use the Electronic Countermeasures (ECM) app to find SSJ & SOJ values in dB

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Total installs: 635
Installs / day: 0
Rating: —★
Released: 7 Mar 2015
Last update: 13 May 2015
Countries: —

Installs per day

gain of the exact counter

Daily tracking since 10 Oct 2026 · history grows every day

Install history

exact counter from Google Play

2dAll

Dashed: estimate from the release date (no daily data before 10 Oct 2026) · time axis compressed before that day

Daily tracking since 10 Oct 2026 · history grows every day

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Availability has not been checked for this app yet. “Check all countries” looks the app up in about 140 Google Play storefronts and shows where it is live, listed but not installable, or missing — plus any country-specific (custom) store listings.

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We estimate where downloads come from using the app’s position in Google Play’s top charts in about 140 countries. This app is not in any chart we have collected yet; the estimate appears as soon as it is.

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App manifest

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Data safety

declared by the developer on Google Play

No data shared with third parties
No data collected

This is the developer's own declaration, summarised from the Play listing. The permissions below show what the app is technically able to access.

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Full description

Note: this app is probably too large for phones but OK for tablets and PCs. 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 These values are for the J/S (SSJ) in dB, Next, for the same jammer in a stand-off scenario and a sidelobe in dB level for the radar antenna, enter Rj and SL values to find J/S (SOJ). For example, Enter Pt = 100, Gr = 35, Br = 1, A = 4, R = 3, Pj = 1, Bj = 20, Gj = 10, Rj = 10, & SL = 20. Your values for J/S (SSJ) and J/S (SOJ) should be 16.5 & -14.0 dB, respectively.

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