3D Ships RCS Modeling...Christoph Bormann © Naval Projects 2015 3D-Ships RCS Modelling The Radar Signature 2 A consideration from operational view: 1) The Knowledge about the own

© 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

2

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.



RCS analysis and optimisation

3

window effects

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



RCS Measurement

4



Determination and analysis of the Radar Signature

5



RCS Hotspots

6



Methods to illustrate the RCS

7



Operational Course to Steer Recommendation with SoFiA

8



Simulation of a real tested ASMD-Situation

9



Characteristics of the RCS

10



Determination of the Radar Signature

11



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

12



Influence of the Ships Manoeuvre in the ASMD scenario

13



The Display of SigMa_RCS

14



Simulation of a real tested ASMD-Situation

15

© Naval Projects 2014

Softkill Scenario

16



Status April 2014

17

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



Status April 2014

18

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



Status April 2014

19



Recorder for ships kinematic Data

20



First Tests 07/2014 aboard WTD71 Ship “KRONSORT”

21

GPS-Antenna

INS/GPS-Sensor



First Results: “measured RCS vs. calculated RCS”

22

RCS Measurement System “MarSig” (WTD71)

SigMa_RCS (Realtime Simulation)

Frequency: 8 GHz / hh

Range: ~ 98oo meter

Time [s]

RC

S [d

B]



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]



Influence of the CAD-Model Resolution

24

CAD-Model with twenty (20) thousand elements



Further Trials with high resolution CAD-Model

25

CAD-Model with two (2) million elements



Photogrammetric 3D-Shipmodeling (feasibility checkout)

26



27

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


From Point cloud to CAD-Model

28



Workflow – CAD Modelling

29

(with twenty (200) thousand elements)



Cloud Compare

30



RCS Calculation – Results vs. Real Measurements

33



IR Signature vs Aspect / Elevation Angle

P. 34



0º

360º

10º

-10º

Roll Angle

Aspect

Angle

CI

W/sr

0º

+ Aspect

Angle

- Roll

Angle

3D Surface Plot Representation

35



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

Most vulnerable aspect at -10º roll

Least vulnerable aspect at -10º roll

P. 36



Anti Ship Missile Defence – Computer Aided Training

39



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Documents

3D Ships RCS Modeling...Christoph Bormann © Naval Projects 2015 3D-Ships RCS Modelling The Radar Signature 2 A consideration from operational view: 1) The Knowledge about the own