Mapping of water depth, turbidity and sea state properties using multiple satellite sensors in aquatic systems

Transcription

1 HYDRO EOMAP GmbH & Co.KG Mapping of water depth, turbidity and sea state properties using multiple satellite sensors in aquatic systems T. HEEGE, C. MOTT, A. PLESKACHEVSKY, S. LEHNER, Germany Earth Observ vation & Mapp ping Photo NASA Outline 1 EOMAP 1. EOMAP 2. Aquatic remote sensing 3. Examples water depth 1

2 Competence Multi- and hyperspectral remote sensing of deep and shallow aquatic systems Physics based data processing Sensor independend data processing technolgy Atmospheric correction & spectral inversion Automation EOMAP started as DLR spin-off in August 2006 Core area of business: Environmental mapping Aquatic systems Water quality Habitat mapping Bathymetry Mörtl Aquatic ecosystem monitoring and protection Coastal engineering and offshore mapping Mapping for optimizing sea-based commerce Operational VA processors Lidar VA processing Offshore related new products Change detection of development zones 2

3 Optical remote sensing: Observation and measurement technique Products P d E l f B h Product Examples for Bathymetry Optical Satellites 3

4 Poel Baltic Sea, Island Poel, RapidEye August 20, 2009 New sensor RapidEye: Intercalibration tests with MODIS Radiometry: Stability, Noise Applications in Baltic Sea: Expected to be limited due to high absorption of DOC Poel Baltic Sea, Island Poel, RapidEye August 20,

5 Poel Baltic Sea, Island Poel, RapidEye August 20, 2009 Sensor radiances Sunglitter corrected Poel Baltic Sea, Island Poel, RapidEye August 20, Channels 1-3 Sunglitter, but no wind generated wave field here 5

6 Poel Baltic Sea, Island Poel, RapidEye August 20, Channels 1-3 Poel Baltic Sea, Island Poel, RapidEye August 20, 2009 Water depth [m]

7 Poel Median filtered, Matrix35 Baltic Sea, Island Poel, RapidEye August 20, 2009 Poel Vergleich mit Echolot- messungen (BSH) Tidekorrektur nicht notwendig 7

8 Poel Baltic Sea, Island Poel, RapidEye August 20, 2009 Poel Baltic Sea, Island Poel, RapidEye August 20, 2009 Vergleich mit Echolot- messungen (BSH) Vergleich mit Echolot- messungen (BSH) RapidEye-Bathymetrie, Median 35 [m] Bathymetrie- bis inkl. 3 m y = x R = 0.88 Standardabweichung: 0.47m IMAGEDATA Linear (IMAGEDATA) Echolotmessungen [m]; N=1698 Mittlerer Fehler von - 0,69 ± 0,92 m bis zu einer Tiefe von 3 m bei einem Konfidenzintervall von 95% und einer angenommenen Normalverteilung 8

9 Poel Poel

10 Poel Poel Westküste Vergleich mit Echolot- messungen (BSH) Vergleich mit Echolot- messungen (BSH) 10

11 Poel Baltic Sea, Island Poel, RapidEye June 16, Vergleich mit Echolot- messungen (BSH) RapidEye-Bathymetrie [m] RE-Bathymetrie bis 5 m y = 1,0012x + 0,4304 R = 0,861 Standardabweichung: 0,62m RE-Bathymetrie Echolotmessungen [m], n = 3713 Mittlerer Fehler von 0,43 ± 1,22 m bis zu einer Tiefe von 5 m bei einem Konfidenzintervall von 95% und einer angenommenen Normalverteilung Products P d E l f B h Product Examples for Bathymetry SAR Satellites 11

12 Untersuchungsgebiet Port Phillip, Melbourne 1. Melbourne, Hafen Port Phillip Partner: DLR Untersuchungsgebiet Port Phillip, Melbourne TerraSAR-X Brusch et al. 2009, Masterarbeit Philipp Held, 2009 Bathymetrie über das Wellenmuster Dispersionsrelation beschreibt das Verhältnis beschreibt das Verhältnis zw.wellenlänge, Wellenfrequenz und Bathymetrie 12

13 SAR satellite based retrieval of water depth TerraSAR-X , Port Phillip near Melborne. DLR data processing Method in development by the German Aerospace Center in collaboration with EOMAP Untersuchungsgebiet Helgoland TerraSAR-X Brusch et al. 2009, Masterarbeit Philipp Held,

14 SAR satellite based retrieval of water depth S. Lehner, A. Pleskachevsky, DLR SAR satellite based retrieval of water depth S. Lehner, A. Pleskachevsky, DLR 14

15 SAR satellite based retrieval of water depth SAR satellite based retrieval of water depth 15

16 Bathymetry from Space: Product fusion optic/radar Synergethic water depth product using QuickBird and TerraSAR-X data Conclusio Bathymetry from Space is possible! Area-wide coverage Frequent repetition Areas difficult to assess (shallow, conflict areas, ) Cost-efficient BUT: Accuracy sufficient? Accuracy depends on turbidity What accuracy do I need? How much am I willing to pay for it? 16

17 THANK YOU FOR YOUR ATTENTION! Poel Langenwerder

18 Earth Observation data Modular Inversion and Processing System MIP atmospheric & water surface corrections subsurface reflection R - spec. optical properties of water constituents spec. spectral reflectance of littoral surfaces S,P,Y water column correction R - -> R - z (bottom) spectral unmixing / classification bottom coverage Water depth QuickBird: Bathymetry from Space / Australia Rottnest Island (West Australia), QuickBird satellite data July 17, 2005 Raw data 18

19 QuickBird: Bathymetry from Space / Australia Rottnest Island (West Australia), QuickBird satellite data July 17, 2005 Subsurface reflectance (atmospheric and water surface corrrected) N 1km QuickBird: Bathymetry from Space / Australia Rottnest Island (West Australia), QuickBird satellite data July 17, 2005 Modular Inversion and Processing System MIP 1km Water depth [m] Areas deeper than 22m: white 19

20 QuickBird: Bathymetry from Space / Australia Rottnest Island (West Australia), QuickBird satellite data July 17, 2005 Modular Inversion and Processing System MIP 1km Water depth [m] Areas deeper than 22m: white QuickBird: Bathymetry from Space / Australia Rottnest Island (West Australia), QuickBird satellite data July 17, 2005 Satellite retrieved by MIP White mask > 22m Echo sounding map VALIDATION: 0-18m R=0.94 SD=20% N=50439 points Areas deeper than 22m: white Ellipsoid: Existing reef/shelf not detected by echo sounding measurement Depth [m]

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24 IKONOS: Bathymetry from Space / Australia IKONOS

25 IKONOS: Bathymetry from Space / Australia IKONOS 2008 IKONOS: Bathymetry from Space / Australia IKONOS 2008 Wassertiefe [m]

26 IKONOS: Bathymetry from Space / Australia IKONOS LADS 2008 Wassertiefe [m] IKONOS: Bathymetry from Space / Australia Water depth [m] Lidar MIP-IKONOS 26

27 IKONOS: Bathymetry from Space / Australia IKONOS LADS 2008 R² = 0,99 LADS MIP qualitativ vergleichbar bis 15m MIP im Flachwasser weniger verrauscht 27