Candidates of GLI vicarious calibration coefficients

(summarized by JAXA GLI calibration 5th group, validation team, and PI team)

Global scheme (ch13-19 fixed) using Rstar6b and Pstar2b (update on 08 Oct 2008)

Kvc_newRstar

1.0985

1.0977

1.0104

1.0907

1.0796

1.0390

1.0375

1.0093

1.0513

0.9655

0.9929

0.9981

1.0000

1.0016

1.0254

0.9897

0.9924

1.0000

1.0925

1.0927

1.0303

1.0398

(Rstar6b is developed by CCSR and distributed by OpenCLASTR, and Pstar2b is developed by NIES/GOSAT team and provided by OpenCLASTR)

Second order coefficients depend on scan mirror incident angle and observation date

Start date of 8 days sample

20030125

1.0837E+00

1.1086E+00

1.0254E+00

1.1093E+00

1.0896E+00

1.0459E+00

1.0265E+00

9.9623E-01

1.0272E+00

9.7893E-01

9.9453E-01

9.8578E-01

1.0000E+00

9.7252E-01

9.9852E-01

9.9658E-01

9.9852E-01

1.0000E+00

2.2431E-04

-7.3775E-04

-9.9107E-04

-1.1003E-03

-7.3111E-04

-5.1757E-04

4.4816E-04

6.1233E-04

5.3577E-04

-6.5746E-04

-3.2694E-04

4.5777E-04

0.0000E+00

8.9711E-04

1.2060E-03

-4.0898E-04

-1.6313E-04

0.0000E+00

-1.0279E-05

5.7942E-06

1.1045E-05

1.5091E-05

1.1328E-05

9.8024E-06

-1.8706E-06

-4.0120E-06

-2.0023E-06

8.7381E-06

7.1411E-06

-7.2669E-07

0.0000E+00

-4.9758E-06

-1.5552E-05

8.0069E-06

6.6676E-06

0.0000E+00

20030202

1.0324E+00

1.0483E+00

9.6789E-01

1.0412E+00

1.0289E+00

9.8408E-01

9.9049E-01

9.7570E-01

1.0096E+00

9.5594E-01

1.0056E+00

1.0075E+00

1.0000E+00

1.0141E+00

1.0315E+00

1.0034E+00

9.9043E-01

1.0000E+00

2.3190E-03

1.7423E-03

1.6404E-03

1.8877E-03

2.0435E-03

2.3452E-03

2.1256E-03

1.5124E-03

1.5235E-03

3.6704E-04

-8.0555E-04

-5.4149E-04

0.0000E+00

-6.3979E-04

-2.3259E-05

-6.0029E-04

4.5688E-04

0.0000E+00

-3.2745E-05

-1.9379E-05

-1.7779E-05

-1.7228E-05

-1.8236E-05

-2.1544E-05

-2.0640E-05

-1.5021E-05

-1.3858E-05

-5.9893E-07

1.2173E-05

9.6315E-06

0.0000E+00

6.1187E-06

-6.4740E-06

9.0125E-06

-2.7853E-06

0.0000E+00

20030314

1.0535E+00

1.0616E+00

9.7631E-01

1.0539E+00

1.0393E+00

1.0057E+00

1.0012E+00

9.8475E-01

1.0181E+00

9.5594E-01

9.9643E-01

9.9781E-01

1.0000E+00

1.0136E+00

1.0368E+00

9.9693E-01

9.7330E-01

1.0000E+00

1.8410E-03

1.3338E-03

1.4121E-03

1.3388E-03

1.5648E-03

1.2558E-03

1.5984E-03

1.0382E-03

1.3728E-03

3.0063E-04

-3.7945E-04

-2.1463E-04

0.0000E+00

-7.8185E-04

-4.0123E-04

-5.5691E-04

8.6890E-04

0.0000E+00

-3.0438E-05

-1.6353E-05

-1.6023E-05

-1.1953E-05

-1.3520E-05

-9.2978E-06

-1.4948E-05

-9.2368E-06

-1.2029E-05

-1.1325E-06

6.7911E-06

6.0073E-06

0.0000E+00

8.6485E-06

-8.2582E-07

8.1020E-06

-6.6821E-06

0.0000E+00

20030407

1.0910E+00

1.0980E+00

1.0093E+00

1.0852E+00

1.0690E+00

1.0116E+00

1.0208E+00

9.9614E-01

1.0257E+00

9.5685E-01

9.9270E-01

9.9420E-01

1.0000E+00

1.0186E+00

1.0513E+00

9.8868E-01

9.6068E-01

1.0000E+00

6.3005E-04

-1.3257E-04

-5.7354E-05

-5.4544E-05

1.9810E-04

9.2808E-04

6.9703E-04

5.4223E-04

1.0831E-03

4.9957E-04

-2.5634E-04

-1.8645E-04

0.0000E+00

-1.2653E-03

-1.4283E-03

-1.8229E-04

1.3895E-03

0.0000E+00

-2.1978E-05

-1.9945E-06

-7.0054E-07

3.9316E-06

2.1695E-06

-5.0027E-06

-4.2817E-06

-3.0117E-06

-8.5109E-06

-3.4957E-06

6.2341E-06

6.3594E-06

0.0000E+00

1.7591E-05

1.5815E-05

5.0399E-06

-1.2484E-05

0.0000E+00

20030509

1.0983E+00

1.0959E+00

1.0064E+00

1.0805E+00

1.0644E+00

1.0168E+00

1.0135E+00

9.8764E-01

1.0205E+00

9.4821E-01

9.8623E-01

9.9174E-01

1.0000E+00

1.0182E+00

1.0491E+00

9.8221E-01

9.6399E-01

1.0000E+00

9.6117E-04

3.6549E-04

3.6229E-04

3.8902E-04

5.8472E-04

8.2847E-04

1.1429E-03

1.0317E-03

1.4342E-03

8.4786E-04

1.1849E-04

-6.1937E-05

0.0000E+00

-1.2874E-03

-1.2963E-03

1.1165E-04

1.2586E-03

0.0000E+00

-2.7944E-05

-8.9472E-06

-6.4972E-06

-2.1423E-06

-3.3500E-06

-5.3099E-06

-1.0590E-05

-1.0036E-05

-1.4192E-05

-8.1611E-06

9.6674E-07

4.0834E-06

0.0000E+00

1.8286E-05

1.4901E-05

1.4216E-06

-1.1634E-05

0.0000E+00

20030610

1.1123E+00

1.1006E+00

1.0078E+00

1.0797E+00

1.0630E+00

1.0165E+00

1.0158E+00

9.9252E-01

1.0271E+00

9.5456E-01

9.8299E-01

9.8448E-01

1.0000E+00

1.0069E+00

1.0454E+00

9.7928E-01

9.6116E-01

1.0000E+00

9.1048E-04

3.4927E-04

3.9553E-04

4.3880E-04

6.1924E-04

7.5804E-04

9.4433E-04

6.8435E-04

1.0975E-03

4.4763E-04

1.8631E-04

2.5088E-04

0.0000E+00

-5.6726E-04

-9.6672E-04

1.5590E-04

1.3329E-03

0.0000E+00

-3.0598E-05

-9.8483E-06

-7.3815E-06

-2.7549E-06

-3.6639E-06

-4.6992E-06

-8.4780E-06

-6.1311E-06

-1.0723E-05

-3.5537E-06

-4.1084E-07

-2.1217E-07

0.0000E+00

9.3302E-06

1.1465E-05

8.1102E-07

-1.3152E-05

0.0000E+00

20030712

1.1251E+00

1.1044E+00

1.0106E+00

1.0825E+00

1.0648E+00

1.0165E+00

1.0174E+00

9.9434E-01

1.0293E+00

9.5468E-01

9.8490E-01

9.8590E-01

1.0000E+00

1.0053E+00

1.0454E+00

9.8155E-01

9.6283E-01

1.0000E+00

1.2422E-03

6.2118E-04

5.4796E-04

5.0508E-04

6.4087E-04

8.5289E-04

9.2362E-04

6.5836E-04

1.1347E-03

4.7470E-04

8.2573E-05

1.6308E-04

0.0000E+00

-5.0649E-04

-9.7208E-04

1.8344E-05

1.3127E-03

0.0000E+00

-3.9197E-05

-1.5182E-05

-1.0633E-05

-4.4200E-06

-4.6329E-06

-6.6076E-06

-8.8071E-06

-6.4176E-06

-1.1331E-05

-4.4445E-06

6.7990E-07

9.0576E-07

0.0000E+00

8.8242E-06

1.1887E-05

2.1399E-06

-1.3911E-05

0.0000E+00

20030813

1.1585E+00

1.1231E+00

1.0215E+00

1.0905E+00

1.0710E+00

1.0206E+00

1.0229E+00

1.0005E+00

1.0381E+00

9.6286E-01

9.9232E-01

9.9008E-01

1.0000E+00

1.0172E+00

1.0515E+00

9.8907E-01

9.6621E-01

1.0000E+00

3.3940E-04

-9.0490E-05

9.6305E-05

9.3374E-05

2.8459E-04

5.8062E-04

6.1341E-04

3.2206E-04

7.2226E-04

8.2289E-05

-2.9407E-04

-7.5415E-05

0.0000E+00

-1.2898E-03

-1.4138E-03

-4.4656E-04

1.1125E-03

0.0000E+00

-3.2958E-05

-8.2253E-06

-5.7950E-06

6.8138E-07

1.0864E-07

-2.8820E-06

-4.5558E-06

-1.9284E-06

-5.8953E-06

-1.0080E-07

4.7078E-06

3.5476E-06

0.0000E+00

1.6985E-05

1.6322E-05

7.4288E-06

-1.2617E-05

0.0000E+00

20030914

1.1680E+00

1.1211E+00

1.0156E+00

1.0820E+00

1.0635E+00

1.0097E+00

1.0147E+00

9.9314E-01

1.0346E+00

9.6323E-01

9.9130E-01

9.9080E-01

1.0000E+00

1.0188E+00

1.0495E+00

9.9107E-01

9.6972E-01

1.0000E+00

6.1562E-04

2.5973E-04

5.1885E-04

5.2140E-04

6.5027E-04

1.1265E-03

1.0479E-03

7.1951E-04

1.0252E-03

1.2963E-04

-1.3232E-04

-4.6142E-05

0.0000E+00

-1.3155E-03

-1.3773E-03

-4.5432E-04

1.0279E-03

0.0000E+00

-3.8992E-05

-1.2809E-05

-1.0460E-05

-3.2768E-06

-3.1812E-06

-8.5401E-06

-8.9486E-06

-6.1450E-06

-9.1415E-06

-8.6682E-07

1.9295E-06

2.4713E-06

0.0000E+00

1.5331E-05

1.5090E-05

6.4752E-06

-1.2748E-05

0.0000E+00

20031016

1.1924E+00

1.1309E+00

1.0209E+00

1.0845E+00

1.0653E+00

1.0199E+00

1.0160E+00

9.9145E-01

1.0353E+00

9.6465E-01

9.9189E-01

9.8968E-01

1.0000E+00

1.0070E+00

1.0355E+00

9.9346E-01

9.7245E-01

1.0000E+00

3.3357E-04

1.6050E-04

4.7014E-04

4.8654E-04

6.1698E-04

7.3367E-04

1.0066E-03

8.0589E-04

1.0754E-03

1.6406E-04

-2.6064E-05

8.8875E-05

0.0000E+00

-5.9031E-04

-6.4287E-04

-4.4810E-04

1.0116E-03

0.0000E+00

-3.9751E-05

-1.3300E-05

-1.0613E-05

-3.1618E-06

-2.9208E-06

-4.6025E-06

-8.7078E-06

-7.2776E-06

-9.6821E-06

-1.8575E-06

3.0686E-07

6.8768E-07

0.0000E+00

6.8079E-06

6.9804E-06

5.8744E-06

-1.3520E-05

0.0000E+00

Kvc = c0 + c1*phi + c2*phi^2, phi: scan mirror incident angle

We recommend to use the c0~c2 for channels 1~5 and the constant Kvc for channels 6~.)

Marge Global Kvc and SCA

Kvc_B+SCA

1.0766

1.0739

0.9986

1.0825

1.0706

1.0304

1.0318

1.0134

1.0583

0.9838

0.9887

0.9941

1.0028

1.0233

1.0586

0.9847

1.0248

0.9898

1.0000

1.0659

1.0479

1.0064

0.9929

0.9256

0.9784

0.9508

0.9000

0.9805

0.9100

1/SCA_ref

1.2760

1.2761

1.1644

1.1860

1.1528

1.0903

1.0722

1.0348

1.0848

0.9729

0.9852

0.9866

1.0028

0.9796

1.0137

0.9746

1.0224

0.9840

1.0000

1.1477

1.0700

1.0029

0.9899

0.9236

0.9613

0.9164

0.8634

0.9327

0.9234

Conclusion of 2nd workshop (2004/04/21, click here for details):

We recommend several vicarious coefficients considered temporal change and scan-mirror incident angle dependency for each application,

because we found different characteristics between bright target and dark target.

You can make your choice for each application.

Second version of Level-1B data will not include the vicarious coefficients, so, users can use a set of coefficients or all 1.0 as their own choice.

Coefficients for version 1 L1B are based on mirror side-A and detector-6. Ones for verison 2 are based on mirror side-B and detecdor-6.

Coefficients considering time and scan-mirror incident angle for Ver.1 are listed here.

Coefficients considering time and scan-mirror incident angle for Ver.2 are listed here.

Coefficients excluding statistical insignificant terms (Ver.3) are listed here.

Selection in level-2 algorithms

Group

Algorithm

Vical coef

Ocean

OTSK1A (Atmos corr)

Global

OTSK13 (SST)

Not Applied

Atmosphere

ATSK1 (cloud detect)

Not Applied

ATSK3 (aerosol)

Global

ATSK5 (cloud)

Not Applied

ATSK6 (water vapor)

Not Applied

Land

All (NDVI etc.)

Not Applied

Cryosphere

CTSK1 (snow detect)

Not Applied

CTSK2b1 (snow prop)

Barrow

Conclusion of 1st workshop (2003/10/24):

We recommend the following SeaWiFS nLw based coefficients (averaged 0508-0711). You can make your choice for each application (e.g. cryos-group chooses "Barrow_20030414"), because the result is still preliminary.

First version of Level-1B data will not include the vicarious coefficients, so, users can use a set of coefficients or all 1.0 as their own choice.

GLI channel

Global Ver.0 (A-side base)

1.073

1.082

1.008

1.095

1.082

1.044

1.041

1.024

1.072

0.996

0.999

1.003

1.000

1.023

1.057

0.995

0.988

1.000

0.883

0.945

0.995

0.975

Global Ver.1 revised (A'-base)

1.075

1.086

1.009

1.099

1.085

1.047

1.044

1.024

1.071

0.986

0.987

0.992

1.003

1.005

1.050

0.964

0.953

0.992

0.881

0.908

0.963

0.943

Global Ver.2 (B-base)

1.081

1.076

1.001

1.085

1.073

1.032

1.013

1.057

0.984

0.989

0.994

1.003

1.011

1.046

0.981

0.986

1.000

0.937

0.960

0.982

0.913

Global Ver.3 (B-base)

1.077

1.074

0.999

1.083

1.071

1.030

1.032

1.013

1.058

0.984

0.989

0.994

1.000

1.023

1.059

0.985

0.990

1.000

0.926

0.951

0.981

0.910

(Channels 14 and 15 have O2 absorption. You can calculate coefficients using column water vapor (WV mm) and airmass=1/cos(soz)+1/cos(saz): coef_ch14=0.9966+0.000337*WV*airmass, coef_ch15=1.0109+0.000592*WV*airmass.)

a) Global simulation by OTSK1A LUT and SeaWiFS nLw (CH13-19 fix, coefficients for GLI detector-6 Mirror-A)

GLI channel

Global0206

1.044

1.058

0.988

1.075

1.065

1.032

1.030

1.013

1.049

0.985

0.989

0.998

1.001

1.029

1.056

0.989

1.603

0.992

1.003

0.924

1.736

0.950

5.174

0.961

0.904

Global0320

1.053

1.061

0.990

1.076

1.064

1.031

1.029

1.012

1.054

0.983

0.990

0.997

1.001

1.029

1.056

0.988

1.607

0.992

1.003

0.919

1.799

0.948

4.353

0.955

0.892

Global0406

1.049

1.062

0.992

1.080

1.070

1.031

1.033

1.015

1.056

0.986

0.991

0.997

1.003

1.023

1.059

0.986

1.594

0.990

1.003

0.927

1.756

0.952

5.610

0.973

0.918

Global0422

1.053

1.064

0.993

1.081

1.070

1.031

1.032

1.014

1.056

0.985

0.989

0.995

1.003

1.021

1.059

0.985

1.602

0.988

1.003

0.928

1.846

0.953

3.827

0.974

0.911

Global0508

1.065

1.069

0.995

1.081

1.070

1.031

1.034

1.017

1.061

0.987

0.990

0.996

1.004

1.024

1.058

0.985

1.597

0.991

1.004

0.928

1.727

0.960

4.618

0.996

0.948

Global0524

1.069

1.071

0.997

1.083

1.071

1.030

1.032

1.014

1.056

0.984

0.987

0.993

1.003

1.021

1.059

0.982

1.569

0.989

1.004

0.926

1.784

0.955

3.271

0.975

0.917

Global0609

1.071

1.074

0.998

1.084

1.072

1.031

1.033

1.015

1.058

0.984

0.987

0.993

1.004

1.025

1.062

0.983

1.571

0.989

1.004

0.926

1.856

0.960

3.677

0.992

0.933

Global0625

1.080

1.076

1.000

1.086

1.074

1.032

1.035

1.016

1.061

0.985

0.989

0.994

1.004

1.023

1.060

0.983

1.579

0.989

1.004

0.925

1.757

0.956

3.041

0.997

0.927

Global0711

1.072

1.076

1.000

1.084

1.073

1.031

1.034

1.015

1.061

0.984

0.989

0.994

1.004

1.025

1.063

0.984

1.600

0.989

1.004

0.925

1.864

0.957

5.634

0.984

0.922

Global0727

1.089

1.080

1.001

1.085

1.072

1.030

1.033

1.014

1.061

0.984

0.988

0.992

1.004

1.022

1.061

0.983

1.585

0.989

1.003

0.926

1.838

0.955

4.935

1.000

0.925

Global0812

1.090

1.079

1.001

1.083

1.071

1.030

1.032

1.013

1.060

0.983

0.988

0.993

1.003

1.020

1.057

0.983

1.580

0.990

1.004

0.922

1.756

0.954

5.247

0.990

0.908

Global0828

1.074

1.076

1.001

1.083

1.071

1.029

1.030

1.011

1.058

0.981

0.987

0.992

1.003

1.023

1.059

0.983

1.579

0.987

1.003

0.926

1.834

0.947

4.687

0.978

0.886

Global0913

1.086

1.079

1.003

1.083

1.071

1.029

1.030

1.011

1.059

0.982

0.988

0.993

1.002

1.023

1.058

0.984

1.580

0.988

1.003

0.925

1.712

0.939

4.644

0.971

0.887

Global0929

1.097

1.081

1.004

1.084

1.072

1.029

1.031

1.012

1.061

0.983

0.989

0.993

1.002

1.022

1.057

0.985

1.583

0.990

1.003

0.925

1.642

0.936

4.853

0.965

0.875

Global1015

1.116

1.086

1.006

1.085

1.071

1.029

1.030

1.011

1.060

0.982

0.988

0.992

1.002

1.022

1.057

0.985

1.582

0.993

1.003

0.929

1.691

0.944

4.841

0.986

0.898

Global1024

1.117

1.091

1.009

1.087

1.073

1.031

1.030

1.011

1.062

0.983

0.990

0.993

1.002

1.021

1.057

0.987

1.598

0.991

1.003

0.928

1.768

0.947

5.922

0.991

0.909

Ver 0 (a-base)

1.073

1.082

1.008

1.095

1.082

1.044

1.041

1.024

1.072

0.996

0.999

1.003

1.000

1.023

1.057

0.995

0.988

1.000

0.883

0.945

0.995

0.975

Ver1 revised(a-base)

1.075

1.086

1.009

1.099

1.085

1.047

1.044

1.024

1.071

0.986

0.987

0.992

1.003

1.005

1.050

0.964

0.953

0.992

0.881

0.908

0.963

0.943

Ver2 (b-side base)

1.081

1.076

1.001

1.085

1.073

1.032

1.013

1.057

0.984

0.989

0.994

1.003

1.011

1.046

0.981

0.986

1.000

0.937

0.960

0.982

0.913

Ver3 (b-side base)

1.077

1.074

0.999

1.083

1.071

1.030

1.032

1.013

1.058

0.984

0.989

0.994

1.000

1.023

1.059

0.985

0.990

1.000

0.926

0.951

0.981

0.910

Ver3 STD (b-side base)

0.022

0.009

0.006

0.003

0.001

0.002

0.003

0.002

0.001

0.002

0.003

0.002

0.007

0.014

0.019

Comment: Channels 13 and 19 are fixed to 1.0 to derive aerosol optical thickness and aerosol-type model. The five sets can show temporal change of the coefficients based on this scheme.

See temporal change analysis

b) Simulation by MOBY nLw and RSTAR5 (CH13-19 fix and with AERONET Tau_a)

channel

MOBY13-19Fix

1.0893

1.0832

0.9997

1.0784

1.0622

1.0252

1.0277

1.0087

1.0584

0.9901

0.9869

0.9911

1.0012

1.0182

1.0575

0.9746

0.9765

1.0000

STD

0.0119

0.0037

0.0024

0.0031

0.0027

0.0028

0.0032

0.0030

0.0062

0.0036

0.0041

0.0033

0.0020

0.0058

0.0063

0.0041

0.0080

0.0000

AERONET_v1.5new_size

1.0719

1.0743

0.9949

1.0672

1.0471

1.0067

0.9968

0.9722

1.0104

0.9186

0.9074

0.9047

0.9058

0.9178

0.9446

0.8544

0.8242

0.8541

STD

0.0177

0.0088

0.0068

0.0075

0.0078

0.0080

0.0100

0.0124

0.0117

0.0173

0.0183

0.0216

0.0207

0.0240

0.0228

0.0287

0.0298

Comment: For the first one, channels 13 and 19 are fixed to 1.0 to estimate the aerosol effect (13 days average from Feb. to Sep.).

The latter uses AERONET tau-a and size distribution data. Four match-ups in 02/07, 04/08, 05/06, 06/15, 09/19, 09/22, and 09/29 are used.

c) GLI Solar diffuser calibration

GLI channel

SCA(1/c)

1.069

1.041

1.040

1.026

1.005

1.009

1.000

1.081

1.055

1.089

1.182

SCA

0.935

0.961

0.962

0.975

0.995

0.991

1.000

0.925

0.948

0.918

0.846

Comment: This is preliminary results using BRDF data of GLI solar diffuser and transmittance of multi-hole screen. High values in short wavelength maybe due to diffuser degradation (yellowing).

Update f20031018: degradation<1%, mean(EL5, EL10,EL15,EL20,TH60,TH65,TH70), newBRDF, 14April2003

d) Ground reflectance measurements at Barrow 2003/04 by Cryosphere and Cal groups

GLI channel

Barrow_20030414(1/c)

0.9364

0.9490

0.9670

0.9863

0.9854

0.9856

0.9806

Barrow_20030414

1.0679

1.0537

1.0341

1.0139

1.0148

1.0146

1.0198

Barrow_20030426(1/c)

0.9465

0.9397

0.9560

1.0116

1.0274

1.0042

0.9794

Barrow_20030426

1.0565

1.0642

1.0460

0.9885

0.9733

0.9958

1.0210

Comment: This is preliminary results using reflectance and aerosol measurements at Barrow. These values will be revised after further analysis.

e) Railroad Valley using RSTAR5b & Tuillier F0 by Yoshida

channel

RV_2003_05_27

1.2419

1.1920

1.1161

1.1035

1.0383

1.0062

0.9732

0.9875

1.0509

1.0097

RV_2003_07_22

1.1134

1.0895

1.0023

1.0419

1.0348

0.9991

0.9796

0.9587

0.9664

1.0395

1.0129

RV_2003_08_19 (Yoshida)

1.2092

1.1878

1.0913

1.1314

1.1207

1.0665

1.0382

1.0124

1.0220

1.0940

1.0677

RV_2003_08_23

1.1920

1.1907

1.0991

1.1455

1.1254

1.0650

1.0308

1.0026

1.0175

1.0952

1.0690

RV_RSTAR Aug av

1.2006

1.1892

1.0952

1.1384

1.1230

1.0658

1.0345

1.0075

1.0198

1.0946

1.0684

f) Railroad Valley provided by Dr. Cattrall, University of Arizona

GLI channel

Railroad20030527

1.2049

1.1014

1.1124

1.0784

1.0462

1.0371

1.0258

0.9947

1.0280

1.0192

0.9869

1.0068

Railroad20030722

1.0419

1.0007

1.0158

1.0212

1.0006

0.9978

0.9969

0.9807

1.0266

0.9997

0.8730

1.0021

Railroad20030819

1.1461

1.0842

1.0973

1.0739

1.0426

1.0325

1.0304

1.0064

1.0566

1.0288

0.9069

1.0392

Railroad20030823

1.1399

1.1031

1.1067

1.0758

1.0385

1.0246

1.0272

1.0076

1.0578

1.0309

0.9347

1.0268

Comment: This is preliminary results at Railroad valley. These values can be influenced by geometric correction (location) error. It will be revised after further analysis.

MTIR bands

A) LOWTRAN and GANAL

GLI channel

20030409 Sim/Obs

0.9352

0.9761

0.9719

1.1294

1.0105

1.0109

1.0153

STD

0.0451

0.1663

0.1013

0.0782

0.0179

0.0156

0.0172

20030514 Sim/Obs

0.9338

0.9610

0.9714

1.1328

1.0123

1.0122

1.0171

STD

0.0484

0.1739

0.0962

0.0740

0.0176

0.0150

0.0158

20030617 Sim/Obs

0.9352

0.9519

0.9670

1.1299

1.0121

1.0123

1.0172

STD

0.0482

0.1603

0.0831

0.0615

0.0163

0.0143

20030828 Sim/Obs

0.9362

0.9447

0.9641

1.1258

1.0120

1.0115

1.0163

STD

0.0466

0.1536

0.0844

0.0621

0.0167

0.0146

0.0153

20031022 Sim/Obs

0.9362

0.9576

0.9737

1.1351

1.0138

1.0129

1.0176

STD

0.0474

0.1495

0.0794

0.0593

0.0159

0.0137

0.0143

Comment: TOA radiance are simulated by LOWTRAN with GANAL profile and Reynolds weekly SST. Emissivity of sea surface=0.99.

The results depend on accuracy of JMA objective analysis water vapor contents.

Nighttime GLI observations are used in this comparison.

Current Level-1B do not include above coefficients because they can be influenced by some simulation error.

See comparison of results by JMA atmospheric profile and NCEP one.