Aardobservatie in beweging

05/03/2013
Remote sensing for water quality
retrieval
Els Knaeps, Dries Raymaekers, Sindy Sterckx (VITO)
Workshop DEME 24/05/2012
Remote sensing of water quality
colour of the sea = blue , green, white, red, yellow, brown and black or any
intermediate shade.
the optical properties of matter such as algae, certain dissolved organic substances,
inorganic suspended particles (e.g. sand, mud, clay) may all affect the water colour.
Conversely, it may be possible to estimate remotely these water constituents.
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Products
IOCCG (2012). Mission Requirements for Future Ocean-Colour
Sensors. McClain, C. R.
and Meister, G. (eds.), Reports of the International Ocean-Colour
Coordinating Group,
No. 13, IOCCG, Dartmouth, Canada.
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Platforms and sensors
400-800 km
A new pair of glasses to view Earth
1-5 km
75-200m
Sentinel-2 concept model
Sentinel-2 concept model
Sentinel-3 concept model
Sentinel-3 concept model
<100m
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Workshop DEME 24/05/2012
Trade-offs
Local coverage
Global coverage
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Satellite
previous ocean colour missions:
CZCS (NIMBUS-7)
POLDER (ADEOS)
OCTS (ADEOS)
SeaWiFS (SeaStar)
OCI (ROCSAT)
OCM (IRS-P4)
MERIS (ENVISAT)
GLI (ADEOS-II)
Current ocean colour missions
include:
MODIS Terra/Aqua (EOSAM1/EOS-PM1)
COCTS (HY-1B)
GOCI-I (COMS)
VIIRS (Suomi NPP)
OCM-2 (Oceansat-2);
Future ocean colour missions
include:
OLCI (SENTINEL-3)
SGLI (GCOM-C1)
GOCI-II (GeoKOMPSAT-2B)
400-800 km
A new pair of glasses to view Earth
1-5 km
75-200m
<100m
Sentinel-2 concept model
Sentinel-3 concept model
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© 2013, VITO NV
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Workshop DEME 24/05/2012
Examples – Chl-a and TSM from MERIS
Workshop DEME 24/05/2012
April 22nd 2003
concentration of CHL,
SPM and the estimated
standard error per pixel
for CHL and SPM
•Systematic acquisition
•Near real time service
•Global coverage
•Low spatial resolution
H.J. Van Der Woerd, R.
Pasterkamp / Remote Sensing of
Environment 112 (2008) 1795–
1807
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Examples – Chl-a and TSM from MERIS
median CHL values for the
month April 2003 , derived
from MERIS RR
observations with HYDROPT
H.J. Van Der Woerd, R.
Pasterkamp / Remote Sensing of
Environment 112 (2008) 1795–
1807
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© 2013, VITO NV
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Workshop DEME 24/05/2012
Example: follow up of dredging plumes
400-800 km
1-5 km
75-200m
<100m
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© 2013, VITO NV
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Airborne
400-800 km
1-5 km
75-200m
<100m
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Workshop DEME 24/05/2012
Example: follow up of TSM concentrations
during the tidal cycle
400-800 km
1-5 km
75-200m
<100m
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© 2013, VITO NV
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Fixed wing UAS
Draganfly UAV
Main goal:Payload flexibility
Main goal: Imaging and point measurements
in complex environments
Specific characteristics:
2.2 meter wingspan
+/- 2kg payload capacity
Draganfly X6
91 cm Max size
1.5 kg max Take-Off weight
ET Cruiser
Oktocopter UAS
Diameter: 105 cm
Height: 42 cm.
Helicopter weight is 1,5 kg
Maximum payload capacity of 2000g
UAV up to 30 kg total weight
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© 2013, VITO NV
Payload: 6-10kg
Wingspan: 380cm
Length:
280cm
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Workshop DEME 24/05/2012
Lichtweight compact cameras
Micro-Hyperspec VNIR
400-800 km
1-5 km
75-200m
<100m
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Fixed cameras
LiCrIS – liquid Crystal based Imaging Spectrometer
PC
400-800 km
Liquid crystal
tuneable filter
1-5 km
Lens
75-200m
<100m
Digital
camera
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Example: Follow up of algae blooms in a
reservoir
400-800 km
1-5 km
75-200m
<100m
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Thank you!
Contact:
els.knaeps@vito.be
http://hyperspectral.vgt.vito.be
VITO remote sensing team
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