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Author:Kokko, Riku
Title:Development of an atmospheric correction code for remote sensing of water quality
Ilmakehäkorjauskoodin kehitys vedenlaadun kaukokartoitukseen
Publication type:Master's thesis
Publication year:2008
Pages:[10] + 74      Language:   eng
Department/School:Elektroniikan, tietoliikenteen ja automaation tiedekunta
Main subject:Avaruustekniikka   (S-92)
Supervisor:Hallikainen, Martti
Instructor:Pulliainen, Jouni
Electronic version URL: http://urn.fi/urn:nbn:fi:tkk-012824
OEVS:
Electronic archive copy is available via Aalto Thesis Database.
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Location:P1 Ark S80     | Archive
Keywords:optical remote sensing
atmospheric correction
water quality
the atmosphere
6SV radiative transfer code
MERIS Lakes
Envisat satellite
MERIS instrumet
MODIS instrument
OMI instrument
optinen kaukokartoitus
ilmakehäkorjaus
vedenlaatu
ilmakehä
6SV-säteilynkulkumalli
MERIS Lakes
Envisat-satelliitti
MERIS-instrumentti
MODIS-instrumentti
OMI-instrumentti
Abstract (eng): In this Master's thesis project an atmospheric correction code using 6SV radiative transfer code and measurements of aerosol optical depth, total column ozone and precipitable water vapor was developed.
Here an atmospheric correction means the estimation of surface reflectance based on the measurement of radiance at the top of the atmosphere.
The MATLAB code, made in this Master's thesis project, computes atmospheric correction parameters at the points of a grid set on the satellite image.
It interpolates the parameters in all pixels of the image.

The surface reflectances estimated with the atmospheric correction code has been compared to validation data and to the atmospheric correction of MERIS Lakes processors.
The atmospheric correction of MERIS Lakes processors was found to be more suitable for the atmospheric correction of water measurements.
However, in the future it is possible to study if the atmospheric correction code, made in this Master's thesis project, could be used for the atmospheric correction of measurements on land area.
Abstract (fin): Tässä diplomityössä on kehitetty ilmakehäkorjausohjelma MERIS -satelliittidatalle.
Ilmakehäkorjaus tarkoittaa maanpinnan reflektanssin arvioimista ilmakehän yläpuolella mitatun radianssin perusteella.
Diplomityössä luotu MATLAB -ohjelma käyttää 6SV-säteilynkulkumallia yhdessä ilmakehän satelliittimittausten kanssa.
Ohjelma syöttää 6SV-säteilynkulkumalliin aerosolien optisen paksuuden ja otsonin sekä vesihöyryn määrän ilmakehässä. 6SVsäteilynkulkumallilla lasketut ilmakehäkorjausparametrit interopoloidaan kaikiin sateliittikuvan pikseleihin.
Lopuksi ilmakehäkorjausohjelma laskee ilmakehäkorjausparametreistä pinnan reflektanssin.
Ohjelman arvioimaa vedenpinnan reflektanssia on verrattu sekä pintamittauksiin että MERIS Lakes -prosessoreiden ilmakehäkorjaukseen.
MERIS Lakes -prosessoreiden ilmakehäkorjaus todettiin sopivammaksi vedenpinnan reflektanssin määrittämiseen.
Jatkossa on kuitenkin mahdollista tutkia, voisiko 6SV-ilmakehäkorjausta käyttää maapinnan reflektanssin määrittämiseen.
ED:2010-12-07
INSSI record number: 41392
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