© Naval Projects 2014

3D Ships – RCS – Modeling 12th Little Crow Conference – IMT, Simonstown

© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

The Radar Signature

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A consideration from operational view: 1) The Knowledge about the own Radar Signature is a crucial factor for the success of active /passive countermeasures in an ASMD scenario. 2) It is mandatory to minimise the signature of the own ship to increase the effectiveness of countermeasures.

© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

RCS analysis and optimisation

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window effects

Optimisation through: Actions taken by design for a new to build ship The use of Radar Absorbing Material in an retrofit

© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

RCS Measurement

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© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

Determination and analysis of the Radar Signature

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© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

RCS Hotspots

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© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

Methods to illustrate the RCS

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© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

Operational Course to Steer Recommendation with SoFiA

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© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

Simulation of a real tested ASMD-Situation

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© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

Characteristics of the RCS

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© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

Determination of the Radar Signature

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© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

Display of the ship´s RCS in a Signature Management task

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© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

Influence of the Ships Manoeuvre in the ASMD scenario

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© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

The Display of SigMa_RCS

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© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

Simulation of a real tested ASMD-Situation

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© Naval Projects 2014

Softkill Scenario

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© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

Status April 2014

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SigMa_D1Threat

Data

RCS

Database

External

interface

Graphical Operator Interface

VHF Modem

Weather Data Ships Kinematik Data

Threat

Properies

RESM

Radar

CMS

Decoy

System

CADRCS

OSSMS

Environmental Data

Repository File

Database

System Border

GPS / INS

© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

Status April 2014

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SigMa_D1Threat

Data

RCS

Database

External

interface

Graphical Operator Interface

VHF Modem

Ships Kinematik Data

Threat

Properies

Decoy

System

CADRCS

Environmental Data

Repository File

Database

System Border

GPS / INS

© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

Status April 2014

19

© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

Recorder for ships kinematic Data

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© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

First Tests 07/2014 aboard WTD71 Ship “KRONSORT”

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GPS-Antenna

INS/GPS-Sensor

© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

First Results: “measured RCS vs. calculated RCS”

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RCS Measurement System “MarSig” (WTD71)

SigMa_RCS (Realtime Simulation)

Frequency: 8 GHz / hh

Range: ~ 98oo meter

Time [s]

RC

S [d

B]

© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

First Results: “measured RCS vs. calculated RCS”

23

RCS Measurement System “MarSig” (WTD71)

SigMa_RCS (Realtime Simulation)

Frequency: 8 GHz / hh

Range: ~ 98oo meter

Time [s]

RC

S [d

B]

© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

Influence of the CAD-Model Resolution

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CAD-Model with twenty (20) thousand elements

© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

Further Trials with high resolution CAD-Model

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CAD-Model with two (2) million elements

© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

Photogrammetric 3D-Shipmodeling (feasibility checkout)

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© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

27

© Engineering Office P. Huber & Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

From Point cloud to CAD-Model

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© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

Workflow – CAD Modelling

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(with twenty (200) thousand elements)

© Engineering Office P. Huber & Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

Cloud Compare

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© Engineering Office P. Huber & Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

RCS Calculation – Results vs. Real Measurements

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© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

IR Signature vs Aspect / Elevation Angle

P. 34

© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

0º

360º

10º

-10º

Roll Angle

Aspect

Angle

CI

W/sr

0º

+ Aspect

Angle

- Roll

Angle

3D Surface Plot Representation

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© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

IR Signature vs Aspect/Roll Angle (-10 to 10º)

Most vulnerable aspect at -10º roll

Least vulnerable aspect at -10º roll

P. 36

© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

Anti Ship Missile Defence – Computer Aided Training

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© Naval Projects 2015 Christoph Bormann

3D-Ships RCS Modelling

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