Epsilon Radar Cross Section (RCS) Prediction by Roke Manor Research

Companies & Organizations:

United Kingdom of Great Britain and Northern Ireland

Roke Manor Research Ltd
Roke Manor Old Salisbury Ln
Romsey, Hampshire SO51 0ZN

Epsilon™ is a software package that predicts the Radar Cross Section (RCS) of electrically large targets directly from a computer model.


Radar signature management


Radar signature management is required by clients who design platforms (eg, aircraft, ships or land vehicles) or radar systems. Designers of military platforms need to minimise RCS to reduce the probability of detection by radar based sensors. Conversely, radar and radar simulator operators require sensitivity analysis of radar systems against predetermined targets.


In all cases, the predicted RCS data can be critical to a design or analysis so the choice of RCS prediction software is paramount.


Epsilon™ is a highly versatile tool which accurately models real life scenarios, enabling clients to rapidly evaluate a target’s radar signature and investigate how that signature varies according to the shape and orientation of their design. This allows various design options to be assessed in order to achieve the most cost effective solution.





Typical applications for Epsilon™ include:


• Conventional radar cross section predictions


• Optimisation of new platform concepts for stealth


• Improvement and retro-design of existing platforms


• Generation of models for physical level simulation


• Imaging of radar targets


Epsilon™ has been used on a variety of radar targets. Wind farms, for example, have been analysed to determine their effect on radar performance.


Other examples include:


• Major platforms: aircraft, ships, tanks, spacecraft


• Secondary field equipment: trucks, generators, stores


• Weapons and weapon release systems


• Antennas


• Buildings and structures



Epsilon™ can also be embedded within simulation tools to provide highly accurate radar representations of targets, for engagement analysis.



Features and benefits


Epsilon™ is more than a theoretical tool. It offers considerable scope to tailor a target’s response to the environment and to a given waveform to ensure realistic RCS data is obtained.


Epsilon™ uses highly accurate model geometry, handles a variety of material surfaces, and includes automatic multiple scattering. Compared with other tools, which require multiple scattering to be completed manually, Epsilon™ saves our clients significant work and removes the possibility of human error in identifying surface interactions.


Accuracy                   • Accurate model geometry used – far superior than a faceted approach

                                  • Automated multiple scattering determines which surfaces interact

                                  • Material modelling options ensure real-world results

                                  • Near field predictions possible by entering a radar-to-target range

Speed                        • Shading algorithm reduces computation time by removing obscured surface areas

Usability                     •User friendly Windows® project based interface

                                   •Data output in text files ready for importing into spreadsheet software

                                   •Screenshots of project windows can be saved for inclusion into reports


Analysis                      •Bistatic/multi-static analysis for investigations into non-conventional radar (e.g. passive radar)

                                   •Scattering statistics

                                   •Diagnostics which identify target regions requiring attention




Epsilon™ is developed and supported by Roke. We have an intimate knowledge of how to use the software and offer a range of support packages to suit our client’s needs – depending upon their requirements and familiarity with the radar signature domain.


• On-site installation


• Supply of hardware


• 2 day/5 day training courses


• Radar signature management consultancy


• Porting to other platforms


• Annual support and upgrades.



Licensing and availability

Epsilon™ is available under licence, subject to export control, or for use during stealth consultancy, counter stealth studies and any aspect of radar cross section technology or radar imaging.



Outline technical specification


Interfaces                  Windows®

                                  Application Programming Interface (API) – to link to third party simulation software

                                  Script files – for batch run processing


CAD                            Compatible with industry standard CAD interfaces – Patran FEM, AutoCAD DXF,

                                    3D Studio, and IGES. Integrated model preparation tool


Model geometry          Parametric cubic

                                    No maximum geometry size


Materials                   Each surface patch of the CAD model is assigned a material property

                                 Material options include Perfect Electrical Conductor (PEC); lookup table of reflection coefficients


Methods                    •Geometrical Optics (GO)

                                  •Physical Optics (PO)

                                  •Physical Theory of Diffraction (PTD)

                                  •Geometrical Theory of Diffraction (GTD)

                                 •Multiple scattering (automated)

                                 •Shooting bouncing ray bundles

                                 •Diffusing ray optics



Analysis                  •Radar imaging – a full phasor-vector result is calculated. There is considerable scope for imaging

                                the target using any component, or linear combination of components, of the scattering matrix

                               • Super resolution processing – embedded super resolution processing algorithms for:

                                 1D (HRR); 2D (ISAR); 2.5D (ISAR); and 3D (ISAR)

                                •Reverse translator – scattered field contributions painted back onto the CAD model

                                •Ray history plots – visualisation of the calculated multiple scattering plots

                                •Bistatic and multi-static modelling

                                •Bulk signature prediction – for signature metric evaluation

                                •High-Range Resolution Range Profile (HRRP) – for target recognition and high bandwidth analyses


Outputs                     Data: ASCII

Graphics:                  Encapsulated postscript


Hardware                  Standard Windows® desktop PC (porting to other platforms is available)

                                  Parallel processing possible across any standard computer network

Defense Products & Services: Epsilon Radar Cross Section (RCS) Prediction by Roke Manor Research
Companies & Organizations: 
Defense Products & Services Sectors: Computers software | Consultancy services
Description: Epsilon Radar Cross Section (RCS) Prediction
Source of Information: Roke Manor Research Ltd