sar data sensords and examples - onf international · sar for forest mapping –2014/2015 sar ers...
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SAR for Forest Mapping – 2014/2015
Sar Technical Training for Forest Mapping – 2014/2015
Cédric Lardeux [email protected]
Jean-Paul Rudant [email protected]
Pierre-Louis Frison [email protected]
SAR dataSensords and examples
SAR for Forest Mapping – 2014/20151991 2002 2007 20101999 2006
ERS1RSO
DiffusiomètreBande C
ERS2RSO
DiffusiomètreBande C
RADARSATRSO
Bande C
JERSRSO
Bande L QuikscatDiffusiomètre
Bande Ku
1992 1995
RADARSAT2RSO
Bande C
COSMO-SkyMedRSO
Bande X
TerraSAR XRSO
Bande X
Tandem XRSO
Bande X
ENVISATRSO
Bande C
ALOSRSO
Bande L
METOPDiffusiomètre
Bande C
Suivi des surfaces continentales par télédétection radar
Capteurs satellitaires radar
SAR for Forest Mapping – 2014/2015
▪ SAR ERS
▪ JERS
▪ ASAR ENVISAT
▪ PALSAR ALOS
▪ NEW:
▪ Cosmo skymed
▪ Terrasar X
Radar Data
SAR for Forest Mapping – 2014/2015
ERS-1: 1991-2000
ERS-2: 1995-2011
C Band (6cm)
Polarisation : VV
Incidence : 20-26°
Ground Resolution: 20 m
Swath : 100 km
Orbit : Périod : 35 days
SAR ERS-1/ ERS-2 (ESA)
Source: ESA
Radar Data
SAR for Forest Mapping – 2014/2015
Typhon Isidore
Mexico - 21.09.2002
ASAR-VV polarization MERIS (600 m)
Polarization
SAR for Forest Mapping – 2014/2015
VV Polarization for ocean monitoring
Polarization
SAR for Forest Mapping – 2014/2015
North Cameroun: Cultural practice, burned area
Radar Data: ERS example
SAR for Forest Mapping – 2014/2015
Radar Data: ERS example
Urban area
SAR for Forest Mapping – 2014/2015
Radar Data: ERS example
Douala region, Cameroon
SAR for Forest Mapping – 2014/2015
Oil pollution Near Bakassi Nigeria-Cameroon
Radar Data: ERS example
SAR for Forest Mapping – 2014/2015
RADARSAT (Canada)
1995-2013
Band C (6cm)
Polarisation : HH
Incidence : 20-49°
Ground Resolution: 10-100m
Swath : 35- 500 km
Orbit : Périod : 24 days
Radar Data
Source: CRSC
SAR for Forest Mapping – 2014/2015
Floods impacts detection
Gash River (Soudan, 2003): 10 km northward Kassala
Radar Data: RADARSAT
SAR for Forest Mapping – 2014/2015
JERS-1 (NASDA, Japon) 1992-1998
L Band (25cm)
Polarisation : VV
Incidence (mean) 35°
Ground Resolution: 18 m
Swath : 75 km
Orbit : Périod : 44 days
Radar Data
SAR for Forest Mapping – 2014/2015
K&C Desert & Water ThemeMapping of sub-surface hydrology in arid areas.L band penetration: Saharan desert
Burried structure and source for the water resources
Radar Data: JERS1
SAR for Forest Mapping – 2014/2015
100 km
Direction de déplacement
485 km
405
km
Wave
VV or HH
<10m resolution (SLC)
5 x 5 km to 10 x 5 km
vignettes
Alternative Polarisation
VV/HH or VV/VH or HH/HV
30m resolution (PRI-GEC)
up to 100 km swath
Image
VV or HH
<30m resolution (PRI-GEC)
up to 100 km swath
Wide Swath
VV or HH
150m resolution
405 km swath width
Global Monitoring
VV or HH
1000m resolution
405 km swath width
ASAR - ENVISAT 2001 - 2013
Radar Data
SAR for Forest Mapping – 2014/2015
Bandes
spectrales
C- Band
C- Band
Résolution
(m)
25
< 30
< 30
150
1000
< 10
Couverture
(km)
100
100
100
405
> 405
5 à 10
Sat.
ERS
E
N
V
I
S
A
T
Angle
d’incidence
23°
Image:
Alt. Polarisation :
Wide:
Global Monitoring:
Wave:
15° - 45°
15° - 45°
19° - 43°
19° - 43°
15° - 45°
Polarisation
VV
VV or HH
VV/HH ,VV/VH
or HH/HV
VV or HH
VV or HH
VV or HH
ENVISAT : ASAR
Radar Data
SAR for Forest Mapping – 2014/2015
Alaotra lake, dry season
Alaotra Lake, March 2005
Flooding Study in Madagascar
LGET-IOGA, IPM, UPEM
Radar Data: ASAR examples
SAR for Forest Mapping – 2014/2015
HV pol.VV pol.
Radar Data: ASAR examples
SAR for Forest Mapping – 2014/2015
Since 2007:
Polarimetry
High resolution (1 m)
Radar Data
SAR for Forest Mapping – 2014/2015
PALSAR - ALOS (NASDA) 2007 - 2011
▪ Band L ( 25cm)
▪ Full Polarisation
▪ polarisationVV, HH, HV, VH
▪ Incidence : 20-49°
▪ Ground Resolution: 10-100m
▪ Swath : 35- 500 km
▪ Orbit : Périod : 24 days
Radar Data
SAR for Forest Mapping – 2014/2015
INTEREST:
L Band
Polarimetry
Systematic acquisition strategy
Radar Data: PALSAR
SAR for Forest Mapping – 2014/2015
Radar Data: PALSAR
SAR for Forest Mapping – 2014/2015
Radar Data
TerraSAR-XSince 2007
▪ Band X (3 cm)
▪ DualPolarisation
▪ 1 or 2 among VV, HH, HV
▪ Incidence : 20-55°
▪ Ground Resolution: 1-20 m
▪ Swath : 3- 150 km
▪ Revisit Time: 11 days
SAR for Forest Mapping – 2014/2015
Source: InfoTerra
SAR for Forest Mapping – 2014/2015
TerraSAR-X Spot Light :25th Jan.
2011
Polar: VV
Spat. Resolution: 1m
Objective: Forest type
Mapping
Cambodia
Radar Data: TerraSAR-X
SAR for Forest Mapping – 2014/2015
TerraSAR-X Spot Light :25th Jan.
2011
Polar: VV
Spat. Resolution: 1m
Bamboo & ForestCambodia
Radar Data: TerraSAR-X
SAR for Forest Mapping – 2014/2015
TerraSAR-X Spot Light :25th Jan.
2011
Polar: VV
Spat. Resolution: 1m
Dense Forest
Cambodia
Radar Data: TerraSAR-X
SAR for Forest Mapping – 2014/2015
Cambodia
TerraSAR-X Spot Light :25th Jan.
2011
Polar: VV
Spat. Resolution: 1m
Deciduous Forest
Radar Data: TerraSAR-X
SAR for Forest Mapping – 2014/2015
TerraSAR-X Spot Light :25th Jan.
2011
Polar: VV
Spat. Resolution: 1m
Herbaceous
Cambodia
Radar Data: TerraSAR-X
SAR for Forest Mapping – 2014/2015
Deciduous Forest Dense Forest
HerbaceousBamboo & Forest
TerraSAR-X Spot Light :25th Jan.
2011
Polar: VV
Spat. Resolution: 1m
Cambodia
Radar Data: TerraSAR-X
SAR for Forest Mapping – 2014/2015
NameAcquisition
period
Band
Frequency
Polarization
mode
Spatial
resolution (m)
Revisit time
(days)
Scene cover
(km)
ERS-1 / 2 91 - 01 C VV 30 35 185x185
JERS 92 - 98 L HH 25 44
Radarsat 95 – 05 C HH 30 26 75 x 75
ASAR 02-12 C1 or 2 pol.
HH/HV/VV25-500 16 60x60
Radarsat-2 2007 - CPolarimetric
HH/HV/VV1-15 5 to 10 ? NA
PALSAR 07-11 LPolarimetric
HH/HV/VV25 5 à 10 ? 100x100 max
TerraSAR-X 2007 - XPolarimetric
HH/HV/VV6,5 5? 77km de large
Cosmo-
Skymed2007 - X
Partial:
HH/HV/VV0,6 à 2,4 1 à 3 15x15km
SAOCOM 2015 L 20 14 120km
Sentinel 1 2015 C 10 à 60m 5 290km
ALOS-2 2015 LPolarimetric
HH/HV/VV
Radar Data