Platform Simulation – 6 degree of freedom platform motion is implemented using internal or external motion models. Position information is specified by latitude, longitude, and altitude. Default motion models include: fixed wing, surface vessel, vehicle and many others. Motion model parameters (roll rate, pitch rate, acceleration, etc.) may be modified to provide approximations of particular platforms (e.g. C-130 vice F-18) Waypoints and tracks may be designated for each platform. Platforms may travel a track and achieve each waypoint by a specified time, or by position only, or may ignore waypoints and follow external commands. Any number of platforms may be selected for external control and/or designated to receive streaming EW signals (i.e. real-time, parametric signal data from emitters in the scenario as would be received in the immediate vicinity of the platform).

Emitter Simulation - Every emitter may contain one or more modes. Each mode contains a pulse data table, beam table, and scan pattern definition. Emitters may switch modes by time or by range from user specified platforms. Emitter modes Support for common antenna motion is supported through scanning pattern simulation. These patterns include fixed, circular, sector, spiral, conical, helical, raster and lobe switching/electronic scans. These scans can be viewed in 3D by the editor during creation and the results of each scan can be viewed and heard in the oscilloscope for each platform in the scenario. Any scan may be controlled externally including the steady scan which allows the beam to be pointed in any azimuth/elevation.


The emitter pulse sequence table allows the definition of individual pulses based on frequency, PRI, PW and the number of times the pulse repeats before moving on to the next row. Not shown in this editor is the ability for EWSS to break down the individual pulse into smaller segments that allow any modulation or any shift keying type to be defined. The EWSS uses this pulse table to generate the stream of pulse data to each of the designated receiver platforms.


Typical antenna beam patterns can be defined in azimuth and elevation. Common beam patterns such as omni, Gaussian, sin x / x, (sin x / x)2 are selectable. A 3D view of the generated beam patterns is available in the editor along with horizontal and vertical sections. In addition the 3D beam view also shows the current scan pattern.

Connectivity & HLA – The EWSS implements a Peer to Peer updating system. Any EWSS may join the scenario of 1 or more others on a single or multiple computers. Automatic updating allows editing or control from multiple stations. Each instance of the EWSS acts as a server for selected platforms and emitter modes. This allows external control of an object in the scenario without undo network traffic. In addition there is EWSS plug-in for the RPR FOM that makes the EWSS HLA compatible.

EWSS Performance Tests – The EWSS has been extensively tested. Some of the tests are listed below. All tests included a designated receiver platform and streamed signal data received and evaluated on a simulated pan display receiver with 8 tuners spanning 0.1 to 40 GHz, an oscilloscope simulation, and a raw audio generating device. All video and audio is generated in real-time. Testing was conducted on a 3.4 GHz, 2GB PC.

• 100.2 Million PPS from 170 emitters.
• 1000 active emitters on 100 platforms within receiving range of selected receiver.
• 2700 active emitters on 2700 platforms world-wide.