Development of satellite oceanography methods
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Development of satellite oceanography methods in FEB RAS corporate oceanographic GIS. Andrey V. Golik, Vitaly K. Fischenko, Stepan G. Antushev V.I.Il’ichev Pacific Oceanological Institute Far-Eastern Branch of Russian Academy of Sciences

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Andrey V. Golik, Vitaly K. Fischenko, Stepan G. Antushev

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Andrey v golik vitaly k fischenko stepan g antushev

Development of satellite oceanography methods

in FEB RAS corporate oceanographic GIS

Andrey V. Golik,Vitaly K. Fischenko, Stepan G. Antushev

V.I.Il’ichev Pacific Oceanological Institute

Far-Eastern Branch of Russian Academy of Sciences

Space Technology & Geo-Informatics 2006, Pattaya, Thailand, 2006


Andrey v golik vitaly k fischenko stepan g antushev

Oceanographic researches at FEB RAS

FEB RAS – Far-Eastern Branch of Russian Academy of Sciences

This is:

25 institutes (6 scientific centers), from them

12 institutes specializing in «Earth sciences», from them

5 institutes specializing in «Oceanography»:

Pacific Oceanological Institute (300 scientists), total about 1000 scientists

Main area of researches: Northwestern Pacific (lithosphere, hydrosphere, atmosphere)


Andrey v golik vitaly k fischenko stepan g antushev

Northeast Scientific Center

( 2 scientific institutes )

Kamchatsky Scientific Center

Institute of Volcanology and Seismology et all (2 institutes)

Sakhalin Scientific Center

Institute of Marine Geology and Geophysics (1 institute)

Primorsky Scientific Center

Pacific Oceanological Institute,

Institute of Marine Biologyet all (4 institutes)

Scientific centers and institutes of FEB RAS,

which perform researches in Northwestern Pacific


Corporative oceanographic gis of feb ras

Corporative oceanographicGIS of FEB RAS

  • Primary task – “deliver to any scientist workplace:

  • all available data about sea and atmosphere in region

  • obvious tools for joint cartographical and scientific data visualization and analytical data processing

  • possibility of use distributed computing resources of FEB RAS network for solving complex resource-intensive tasks”


Typical view of gis feb ras user interface

Typical view of GIS FEB RAS user interface


Work with different data layers and types

Morphological image analysis

(oil spill localized and described)

Bottom sediments in Japan sea

Query for satellite images contain oil spills

CTD station locations in 1958

Work with different data layers and types

Current status: 54thematical layers, about 150 Gb of data, 6software tools for analytical data processing, link to 3 remote data storage in FEB RAS network, monitoring of 5 oceanographic internet resources.


Information layer satellite oceanography

Information layer “Satellite oceanography”

  • Supported in GIS FEB RAS since 2002

  • Purposes of satellite data integrationinto GIS:

  • provide all interested FEB RAS scientists with online access to new information layer – sea environment satellite observations data;

  • for “satellite” oceanographers – possibility to get various corresponding data on state of the sea environment in order to improve methods of satellite information interpretation;

  • for “traditional” oceanographers – possibility to use results of satellite observations over research area in analysis and interpretation of oceanographic data;

  • provide all interested GIS users with effective software tools for processing, analysis and interpretation of satellite images.


Sar images in gis feb ras

SAR-images in GIS FEB RAS

GIS contains large collection of different data from satellites ERS-1/2, Envisat, NOAA, Terra/Aqua, etc. (about 2000 images, total volume more than 10 Gb).

  • Main part is database of SAR-images from ESA received by satellites ERS-1/2.

  • It prepared in POI Satellite oceanology department.

  • Registering device: synthetic aperture radar (frequency: 5.3 GHz, frame size: 100x100 km, resolution: ~25x25 m).

  • Observation regions: Okhotsk, Japan, East and South China, Yellow, Sulawesi and Sulu Seas.

  • Observation period: 1991 – 2005 years.

  • Data volume: ~ 3 Gb, more than 1000 images.

  • Primary tasks which are being solved with this set of SAR images:

  • development of methods for detection and spatial localization of oceanological phenomena on SAR images

  • demonstrate to scientists of FEB RAS possibilities of satellite radar with synthesized aperture for tasks of monitoring of sea state on large areas


Phenomena on satellite images

Phenomena on satellite images

  • With every SAR-image linked set of oceanographic and atmospheric phenomena that has visual appearanceoceanographic phenomena: coastal front current current front eddy ice internal waves ocean front oil pollution slicks upwelling etc.atmospheric phenomena: atmospheric front atmospheric waves rain wind etc.Total 47 oceanographic and atmospheric phenomena


Andrey v golik vitaly k fischenko stepan g antushev

User interface


Andrey v golik vitaly k fischenko stepan g antushev

SAR-images with oil pollutions


Andrey v golik vitaly k fischenko stepan g antushev

SAR-images with internal waves


Andrey v golik vitaly k fischenko stepan g antushev

SAR-images with ice in bay Aniva in March 1999


Andrey v golik vitaly k fischenko stepan g antushev

Expert interface – add new SAR-image in GIS


Andrey v golik vitaly k fischenko stepan g antushev

Expert interface – select image for description


Andrey v golik vitaly k fischenko stepan g antushev

Expert interface – phenomena description

Expert use visual analyze and data processing tools from GIS


Using gis analytical tools for satellite image processing

Using GIS analytical tools for satellite image processing

  • GIS users can use a set of image processing tools from analytical support system. These tools allow to:

  • perform various image transformations for visual improvements, noise reduction and restoration of source physical fields using algorithms of linear and non-linear spatial filtration, filtration algorithms based on fast orthogonal transformations;

  • perform wide set of orthogonal image transformations (Fourier, Haar, Hadamard, Hartley, Cos & Sin – transformations, wavelet transformations);

  • perform correlation-spectral image analysis;

  • perform morphological image analysis;

  • analyze any one-dimension sections of image using modern methods of digital signal processing.


Andrey v golik vitaly k fischenko stepan g antushev

Usage of GIS analytical tools is very simple

Expert can copy image from GIS window to clipboard and paste in desktop program


Andrey v golik vitaly k fischenko stepan g antushev

Spatial satellite image filtering

Original image and 5 different filtering results


Andrey v golik vitaly k fischenko stepan g antushev

Spatial-frequency filtering (SFF) of satellite imageusing «global»filter

Original image, Fourier-spectrum, modified Fourier-spectrum, result


Andrey v golik vitaly k fischenko stepan g antushev

«Dynamical» operation – very useful tool for local features analysis

“Dynamicalspectral analysis” of anysatellite image fragment


Andrey v golik vitaly k fischenko stepan g antushev

“Dynamical SFF filtering”

Swell-waves deleted by using local SFF, keep only internal waves


Andrey v golik vitaly k fischenko stepan g antushev

Using «dynamical template matching» for mesoscale ocean eddy moving analysis

Two satellite image with time difference in half hour (maximum of cross correlation function determine shift of eddy structure)


Andrey v golik vitaly k fischenko stepan g antushev

Image

Fourier-spectrum

Correlation

IFC 1

and it approximation

IFC 2

and it approximation

ISC

Correlation-spectralanalysis of SAR image

ISC – integral spatial characteristics

IFC – integral frequency characteristics

On this figure presented: original image; 2D Fourier spectrum; 2D correlation function; integral spatial characteristic describing properties of image structure anisotropy; 2 modifications of integral frequency characteristic with results of it’s approximation using one of the correlation-spectral models provided by tool.


Andrey v golik vitaly k fischenko stepan g antushev

Morphological analysis of SAR image

Oil pollution recognition (original, binary, recognized)


Joint usage of satellite and non satellite data

Joint usage of satellite and non-satellite data

Important advantage of conception of union geoinformatics and space technologies is opportunity to organize joint work of specialists in different knowledge fields. Such joint work encourages development of both satellite methods and other scientific methods. During trial use of oceanographic GIS FEB RAS there were outlined some «points of interest intersection» for satellite oceanographers and specialists in different oceanography fields.


Restoration sst ssw fields from amsr e data task

Restoration SST & SSW fields from AMSR-E data task

channel 6GHz - V

channel 6GHz - H

channel 10.65GHz - V

channel 10.65GHz - H

T = fT(Ch1, Ch2, Ch3, Ch4, …)

W = fW(Ch1, Ch2, Ch3, Ch4, …)

restored SST field

restored SSW field


Andrey v golik vitaly k fischenko stepan g antushev

POI FEB RAS

GIS-server

Internet

Laboratory of satellite oceanology

Server contains local copies of AMSR-E data

Client P

Client Q

Computing resources

Client 1

Client I

Client J

Client N

Gateway

Server NEAR-GOOS

(in Japan)

Server contains

satellite data AMSR-E

(in Japan)

Development and research of algorithms of physical field restoration using AMSR-E data and Near-GOOS data

Configuration of task


Validation of the sst field retrieval algorithm

Validation of the SST field retrieval algorithm


Andrey v golik vitaly k fischenko stepan g antushev

  • Joint using in GIS two methods of remote sensing:

  • Satellite oceanography

  • Seismoacoustic with laser interferometer methods


Andrey v golik vitaly k fischenko stepan g antushev

Base idea of seismoacoustic methods on Shultz cape

A

B

R

A

R

B

Δ R


Andrey v golik vitaly k fischenko stepan g antushev

Shultz cape

SAR-image in same time (internal waves?)

Support of seismoacoustic researches on Shultz cape

internal waves?

surface waves?

signal of Earth’s deformations

Fourier-spectrum of signal


Andrey v golik vitaly k fischenko stepan g antushev

Analysis tide effects: 7-days record and result wavelet-filtering tide effects, Fourier-spectrum, continuous wavelet transformation. Detected periods– 12 and 24 hours.


Andrey v golik vitaly k fischenko stepan g antushev

Analysis hydro acoustic signal response: earth microdeformation signal (1 second), Fourier-spectrum, wavelet transform.

Detected base frequency of hydro acoustic signal – 22 Hz.


Andrey v golik vitaly k fischenko stepan g antushev

About possibilities of joint use satellite and seismoacoustic data for tsunami detection.

1. At present time discussed different satellite methods for tsunami detection.

2. Seismoacoustic data allow differ «tsunami-alert» and «tsunami-not alert» underwater earthquakes.

Tsunami-not alert earthquake in Japan sea.


Andrey v golik vitaly k fischenko stepan g antushev

Tsunami-alert earthquake in Japan sea (was not tsunami)


Andrey v golik vitaly k fischenko stepan g antushev

Tsunami-alert earthquake in Adaman sea (was tsunami)


Conclusion

Conclusion

We believe that joint usage of geoinformatics and space technologies by specialists in various fields of science encourages development of both corresponding fields of science and space technologies. As we tried to show in this presentation, it is fair at least for oceanography.

Thank you for your attention!


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