performances prediction of optronic sensors in maritime environment itbms 2011 – 27-30 june
Post on 07-Jan-2016
31 Views
Preview:
DESCRIPTION
TRANSCRIPT
Performances prediction
of optronic sensors inmaritime environment
ITBMS 2011 – 27-30 JuneL. Gardenal (CS, France)D. Dion (RDDC-Valcartier,
Canada)F. Lapierre (ERM, Belgium)
E. Mandine (CS, France)
CS Communication & Systèmes – ITBMS 20112
Outline
Frame
Overview on the LIBPIR library
First results
Future work
Perspectives
CS Communication & Systèmes – ITBMS 20113
Frame
Since more than 10 years, CS works on optronic projects in different context (MWPS [maritime security], Basirn [IR images data base], Sypir, …)
3 years ago, CS has decided to invest on the development of a calculation library for predicting performances of optronic sensor
LIBPIR is the pedestal of a future PREDIR
First version of LIBPIR has just been completed by CS with the help of DRDC Valcartier and ERM
SMARTI : computational module developped by DRDC (Defence R&D Canada) including MODTRAN
OSMOSIS : opensource library developped by ERM (Royal Military Academy of Belgium)
It is currently integrated in the French Navy TDA « PSAD » by DCNS group
PSAD will provide the future french frigate FREMM with AC/EM/IR sensor performance assessment
CS Communication & Systèmes – ITBMS 20114
Overview on the LIBPIR library (2/2)
TARGET- CAD
- Emissivity...
OSMOSISFacet surface temperature
Radiance target
calculation
Intrinsic target radiance
Meteorological and
environmental description
Reader
PROPAGATION MEDIUM
- Meteorological profiles
- Marine surface layer
- Sky+land+sea- ...
MODTRAN
SMARTI
Ray paths
Transmittances
Path radiances
Background radiances
SENSOR- Height
- Spectral band- Resolution
- ...
Target IR signature
calculationTarget radiance
2D optronic scene
Optical horizon, Maximum
InterVision Range
2D optronic scene
generator
3D intrinsic target radiance
image generator
Sensor performances
calculation
3D intrinsic target radiance image
Contrast, Detection
probability, DRI ranges
CS Communication & Systèmes – ITBMS 20115
LIBPIR Calculation components
SMARTI (DRDC-Valcartier) Spectral and wideband CK transmittance & radiance
MODTRAN molecular extinctions (CK)
Marine surface layer model
MODTRAN and DRDC aerosol models
DRDC accurate refracted path calculation
Lambert and Sea surface (DRDC analytical model) BRDF
Reference: DENIS DION
Osmosis (ERM) Open-source target surface temperature Modeling Software
Fast and robust software
Validation : CUBI project
Reference: FABIAN LAPIERRE or www.osmosis-project.org
CS Communication & Systèmes – ITBMS 20116
LIBPIR: Some intermediary results
1E-43
1E-41
1E-39
1E-37
1E-35
1E-33
1E-31
1E-29
1E-27
1E-25
1E-23
1E-21
1E-19
1E-17
1E-15
1E-13
1E-11
0.000000001
0.0000001
0.00001
0.001
0.1
0 5000 10000 15000 20000 25000
Distance (m)
Tra
nsm
itta
nce
LIBPIR IR3 LIBPIR ADVECTIVE FOG LIBPIR // RADIATIVE FOG
0
20
40
60
80
100
120
140
160
180
200
0 5000 10000 15000 20000 25000 30000 35000 40000
RANGE
HE
IGH
T
CS Communication & Systèmes – ITBMS 20117
First resultsInfluence of environment on performances of optronic
sensorsSensor: 3 FOV:
• 40°x30° (for short ranges)• 5°x3.75°(for medium ranges)• 2°x1.5° (for long ranges)
Height: 10 m
MidWave
Environment: 3 RH: 50, 80 and 95%
3 WSPD: 5, 10 and 15 m/s
3 ASTD: -10, 0 and 10 °C
Advective and radiative fogs
12h00 // MAY 2010
Place: Mediterranean sea (South of France)
Target: Destroyer
CS Communication & Systèmes – ITBMS 20118
First results First task: Definition of optical properties on the target
VISIBLE / 12h00
50°C
Albedo = 0.9
Albedo = 0.5
Albedo = 0.1
CS Communication & Systèmes – ITBMS 20119
First results IR signature: influence of the optronic band
VISIBLE SWIR
LWIRMWIR
CS Communication & Systèmes – ITBMS 201110
First results Influence of ASTD on an optronic scene
ASTD = 0°C ASTD = -10°C ASTD = +10°C
10 km
20 km 5*3.75°
CS Communication & Systèmes – ITBMS 201111
First results Influence of ASTD on an optronic scene
ASTD = 0°C ASTD = -10°C ASTD = +10°C
Apparition of mirage (ASTD < 0°C)
Compression of target image (ASTD growing)
Variation of optical horizon
Limitation of the target detected form (ASTD < 0°C)
20 km
2*1.5°
CS Communication & Systèmes – ITBMS 201112
Range = 4.5 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201113
Range = 5.6 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201114
Range = 6.7 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201115
Range = 7.8 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201116
Range = 8.9 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201117
Range = 10.0 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201118
Range = 11.1 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201119
Range = 12.2 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201120
Range = 13.3 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201121
Range = 14.4 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201122
Range = 15.5 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201123
Range = 16.6 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201124
Range = 17.7 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201125
Range = 18.8 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201126
Range = 19.9 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201127
Range = 18 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201128
Range = 16.6 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201129
Range = 15.5 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201130
Range = 14.4 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201131
Range = 13.3 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201132
Range = 12.2 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201133
Range = 11.1 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201134
Range = 10.0 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201135
Range = 8.9 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201136
Range = 7.8 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201137
Range = 6.7 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201138
Range = 5.6 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201139
Range = 4.5 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201140
Range = 4.5 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201141
Range = 4.5 km
ASTD = +10°C
ASTD = -10°C
CS Communication & Systèmes – ITBMS 201142
First results Fog examples
LWC = 0.01 g/m3Range = 1 km
LWC = 0.01 g/m3Range = 0.5 km
LWC = 0.01 g/m3Range = 1 km
LWC = 0.01 g/m3Range = 0.5 km
ADVECTIVE RADIATIVE
CS Communication & Systèmes – ITBMS 201143
Some first performance results
Contraste max
Detection probability (PoD) Max value
Using « noise equivalent irradiance » (5e-9 W/m2) for calculating signal to noise ratio
Using Detection probability curves
Pfa = 10-5
DRI ranges Based on Jonhson Critera (NvTherm approach)
Acquistion probability = 0.99
CS Communication & Systèmes – ITBMS 201144
First results Influence of relative humidity on contrast
0
10
20
30
40
50
60
70
80
90
100
5000 7000 9000 11000 13000 15000 17000 19000
RANGE (m)
CO
NT
RA
ST
(%
)
RH = 50 p.c. RH = 80 p.c. RH = 95 p.c.
CS Communication & Systèmes – ITBMS 201145
First results Influence of wind speed on contrast
0
10
20
30
40
50
60
70
80
90
100
5000 7000 9000 11000 13000 15000 17000 19000
RANGE (m)
CO
NT
RA
ST
(%
)
WSPD = 5 m/s WSPD = 10 m/s WSPD = 15 m/s
CS Communication & Systèmes – ITBMS 201146
First results Influence of relative humidity on PoD
0
10
20
30
40
50
60
70
80
90
100
5000 7000 9000 11000 13000 15000 17000 19000
RANGE (m)
Pd
(%
)
RH = 50 p.c. C RH = 80 p.c. RH = 95 p.c.
CS Communication & Systèmes – ITBMS 201147
First results Influence of wind speed on PoD
0
10
20
30
40
50
60
70
80
90
100
5000 7000 9000 11000 13000 15000 17000 19000
RANGE (m)
Pd
(%
)
WSPD = 5 m/s WSPD = 10 m/s WSPD = 15 m/s
CS Communication & Systèmes – ITBMS 201148
First results Influence of relative humidity on DRI ranges
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
Identification Recognition Detection
Range (m)
RH = 50 p.c. RH = 80 p.c. RH = 95 p.c.
CS Communication & Systèmes – ITBMS 201149
First results Influence of wind speed on DRI ranges
0
5000
10000
15000
20000
25000
30000
35000
Identification Recognition Detection
Range (m)
WSPD = 5 m/s WSPD = 10 m/s WSPD = 15 m/s
CS Communication & Systèmes – ITBMS 201150
First conclusions
LibPir results coherent with what is expected: Contrast is better with
• Low relative humidity (small differences)
• Low wind speed
System PoD is better with:
• Low relative humidity (small differences)
• Low wind speed
Estimation of DRI sensor performances: Better with low relative humidity and low wind speed
LibPir calculation time: 1 to few minutes
Calculation coherent along the atmospheric column
Marine surface layer characteristics are taken into account refraction
presence of sea aerosol particles
humidity gradient
CS Communication & Systèmes – ITBMS 201151
Future works and perspectives
Future works : Take into account Inhomogeneous environnement by coupling LIBPIR with a NWP
model (like Arome from Meteo France)
Add Turbulence effects (scintillation, diffusion and centroïd move)
Use Sea, land and sky texture (for IR scene purpose)
Improve
• sensor model (MRTD, PoD)
• Air target model (plume, gaz, …)
• Surface target model (e.g. adding wake)
Work with Matisse
… integration in a stand-alone software (PREDIR)
Short-term perspective: Measurement campaign for Aerosol model improvement
Validation of the coupling of Meteo France NWP Arome with a 3D aerosol extinction
CS Communication & Systèmes – ITBMS 201152
Performances prediction of optronic sensors in maritime environment
Thank you for your attention
Any questions ?
Mail: lionel.gardenal@c-s.fr
top related