Requirement for atmospheric corrections Linear stretch images of TOA and Rayleigh/Ozone/Water Vapor...

Requirement for atmospheric corrections

Requirement for atmospheric corrections

Linear stretch images of TOA and Rayleigh/Ozone/Water Vapor Corrected reflectance by using the same reflectance maximum and minimum

TOA reflectance Rayleigh/Ozone/Water VaporCorrected reflectance

Surface reflectance and Top of the atmosphere

Surface reflectance and Top of the atmosphere

Image from: http://www.profc.udec.cl/~gabriel/tutoriales/rsnote/cp9/cp9-2.htm

PEN EquipmentsPEN EquipmentsTKY

TGF

MSE

RHN

Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Jan. Feb.

HSSR

http://www.pheno-eye.org

SP

ADFC

Validation (SP & MOD08)Validation (SP & MOD08)

0

0.4

0.8

1.2

1.6

2005 2006

Optical Depth Skyradiometer(400nm) MOD08(470nm)

0

0.4

0.8

1.2

1.6

2005 2006


0

0.4

0.8

1.2

1.6

2005 2006


0

0.4

0.8

1.2

1.6

2005 2006


0

0.4

0.8

1.2

1.6

2005 2006


0

0.4

0.8

1.2

1.6

2005 2006


0

0.5

1.0

1.5

2.0

2005 2006

Angstrom Exponent Skyradiometer(400-675nm) MOD08(470-660nm)

0

0.5

1.0

1.5

2.0

2005 2006

Angstrom Exponent Skyradiometer(400-675nm) MOD08(470-660nm)

Validation (SP & MOD04)Validation (SP & MOD04)

0

0.4

0.8

1.2

1.6

MO

D04(4

70nm

)

0 0.4 0.8 1.2 1.6Skyradiometer(400nm)

Optical Depth

TKY

0

0.4

0.8

1.2

1.6

MO

D04(4

70nm

)


Optical Depth

TKY

0

0.4

0.8

1.2

1.6

MO

D04(5

50nm

)


Optical Depth

TKY

0

0.4

0.8

1.2

1.6

MO

D04(5

50nm

)


Optical Depth

TKY

0

0.4

0.8

1.2

1.6

MO

D04(6

60nm

)


Optical Depth

TKY

0

0.4

0.8

1.2

1.6

MO

D04(6

60nm

)


Optical Depth

TKY

0

0.5

1.0

1.5

2.0

MO

D04(4

70-6

60nm

)

0 0.5 1.0 1.5 2.0Skyradiometer(400-675nm)

Angstrom Exponent

TKY

0

0.5

1.0

1.5

2.0

MO

D04(4

70-6

60nm

)

0 0.5 1.0 1.5 2.0Skyradiometer(400-675nm)

Angstrom Exponent

TKY

TGFTGF TGFTGF

TGFTGF TGFTGF

Previous System FrameworkPrevious System Framework

MODIS MOD08 Daily image

• Time consuming and need high level user experience.

• Lack of Robustness and scalable

• Not convenience for sharing among communities

On developing

PEN Observation System


SPSP

ADFCADFC

HSSRHSSR

PSSPSSPSSPSS

Site BSite BSite BSite B

Site CSite CSite CSite CSite DSite DSite DSite D

PMSPMSPMSPMSInput Web

Page

PEN DB & Backup

52NorthSOS52NorthSOS Mapserver Mapserver

OGC System Framework OGC System Framework



SPSP

ADFCADFC

HSSRHSSR

PSSPSSPSSPSS SOSSOSSOSSOS

MODIS MOD08 MODIS MOD08 Daily imageDaily image

WMS,WMS-TWMS,WMS-TWMS,WMS-TWMS,WMS-T

WPSWPSWPSWPS

GetFeatureInfo[MODIS value

from start to end]

JSONGetObservation[During MODIS

overpass time from start to end]

JSON

Overpass time Overpass time scenescene

PyWPS• Validation process• Least Square Fitting process

PyWPS• Validation process• Least Square Fitting process

ClientClientClientClient

Execute[station,start,end,product]

JSON

GetObservation ADFC

Satellite-Field Data Integrator (SFI)

ConclusionConclusion

• Comprehensive web-based GIS system framework enabled – Based on various open standards of OGC specifications– Using FOSS

• Mapserver, 52North SOS, PyWPS• OpenLayers, jQuery,

• Assimilation of sensor observation data and satellite image– Wider area, More accuracy, Reasonable cost

• Validation of aerosol properties from Satellite estimation with ground based sites– Improve the following product which relied on satellite image

“surface reflectance”

Future DevelopmentFuture Development

• Increase atmospheric observation network– Skynet

• Improving performance– Distributing ground site data source

• More than two million records for two station and four years

– WMS-T full supported with Mapserver– MOD03 overpass time to MOD08 Global dataset

• Possible to error 5 minutes observation

• Satellite image product validation– GLEON (Global Lake Ecological Observatory Network)

• Lake monitoring : SST, Chl. A : MODIS Ocean product

– CO Flux monitoring : Asiaflux / Japanflux

• Water Column Correction– CREON (Coral Reef Environmental Observatory Network)

• Validation with higher satellite image resolution– ASTER, FOMARSAT

Requirement for atmospheric corrections Linear stretch images of TOA and Rayleigh/Ozone/Water Vapor...

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