Summary of the SGLI Level-2 Products
Validation Results(Ver. 1.00)
Earth Observation Research Center
Japan Aerospace Exploration Agency
December 20, 2018

6-1

History• Dec. 23, 2017
• Jan. 1, 2018
• Mar. 28, 2018
• Dec. 20, 2018

GCOM-C (SHIKISAI) launched
Release of the SGLI First-Light images
Initial functional verification completed
Public release of Level-1 and Level-2 products

6-2

Summary of the Validation of SGLI L2 Products
GCOM-C Success criteria (data production aspect only)
Level
StandardProducts

Minimum Success[L + 1yr]

Full Success[L + 5yr]Complete the Cal.& Val. phase and Achieve standard
start data distribution of more than accuracies of all
20 products achieving the releasestandard products
threshold accuracy

Results of the post-launch validation
Level/Area[TheAtmosphere
Land [9]number of products][8]

Extra Succees[L + 5yr]

Achieve the target
accuracy of one ormore products

Ocean [7]Cryosphere[4]

Total [28]Release thresholdachieved

987428

Standard accuracy
threshold achieved

1431

9

Target accuracy achieved

02103

ü The release thresholds (the first accuracy target) of all L2 standard products havebeen achieved. In addition, the evaluation results indicate that nine (and three) L2
products have already reached the levels of the standard accuracy for the fullsuccess (and the target accuracy for the extra success) at this stage.

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Summary of the Validation of SGLI L2 Products
Accuracy Requirements of SGLI L2 products and Current Evaluation Status

Vegetation and carbon cycle
Cloud

AtmospheretemperatureLandSurface reflectanceArea Group ProductRelease threshold

Standard accuracy

Target accuracy

Precise geometric correction◎<1 pixel<0.5 pixel<0.25 pixel

Atmospheric corrected reflectance(incl. cloud detection)○

0.3 (<=443nm),
0.2 (>443nm) (scene)

0.1 (<=443nm),
0.05 (>443nm) (scene)

0.05 (<=443nm),
0.025 (>443nm) (scene)

Vegetation index○

Grass:25% (scene),
forest:20% (scene)

Grass:20% (scene),
forest:15% (scene)

Grass:10% (scene),
forest:10% (scene)

Above-ground biomass○

Grass:50%, forest: 100%

Grass:30%, forest:50%

Grass:10%, forest:20%

Vegetation roughness index○

Grass & forest: 40% (scene)

Grass & forest:20% (scene)

Grass & forest:10% (scene)

Shadow index○

Grass & forest: 30% (scene)

Grass & forest:20% (scene)

Grass & forest:10% (scene)

fAPAR

○

Grass:50%, forest: 50%

Grass:30%, forest:20%

Grass:20%, forest:10%

Leaf area index○

Grass:50%, forest: 50%

Grass:30%, forest:30%

Grass:20%, forest:20%

Surface temperature○<3.0 K (scene)<2.5 K (scene)<1.5 K (scene)

Cloud flag/Classification

10% (with whole-sky camera)

Incl. below cloud amount

Incl. below cloud amountClassified cloud fraction☆
☆

20% (on solar irradiance)

15% (on solar irradiance)

10% (on solar irradiance)

Cloud top temp/height◎

1K

3 K/2 km (top temp/height)

1.5 K/1 km (temp/height)

Water cloud OT/effective radius○10%/30% (CloudOT/radius)

100% (as cloud liquid water)

50% / 20%

Ice cloud optical thickness

○○○
◎

30%

70%

20%

0.1 (Monthly τa_670,865)

0.1 (scene τa_670,865)

0.05 (scene τa_670,865)

0.15 (Monthly τa_380)

0.15 (scene τa_380)

0.1 (scene τa_380 )0.15 (Monthlyτa_670,865)

0.15 (scene τa_670,865)

0.1 (scene τa_670,865)

Aerosol over the oceanaerosol

Status*1

Land aerosol by near ultra violet
Aerosol by Polarization*1 Symbols denote as follows; 〇: the release threshold achieved, ◎: the standard accuracy achieved, ☆: the target accuracy achieved.

6-4Summary of the Validation of SGLI L2 Products
Accuracy Requirements of SGLI L2 products and Current Evaluation Status
Area Group ProductRelease threshold

Standard accuracy

Target accuracy

Normalized water leaving radiance(incl. cloud detection)◎60% (443~565nm)

50% (<600nm)
0.5W/m2/str/um (>600nm)

30% (<600nm)
0.25W/m2/str/um (>600nm)

Atmospheric correction parameters○80% (AOT@865nm)

50% (AOT@865nm)

30% (AOT@865nm)

Photosynthetically available radiation◎20% (10km/month)

15% (10km/month)

10% (10km/month)

Chlorophyll-a concentration○−60~+150% (offshore)−60~+150%−35~+50% (offshore),−50~+100% (coast)

Suspended solid concentration○−60~+150% (offshore)−60~+150%−50~+100%

Colored dissolved organic matter○−60~+150% (offshore)−60~+150%−50~+100%

temperatur
Sea surface temperaturee☆

0.8 K (daytime)

0.8 K (day & night time)

0.6 K (day & night time)

Snow and Ice covered area (incl. cloudArea/detection)
distributio
nOkhotsk sea-ice distribution

○10%

7%

5%

○10%

5%

3%

Snow and ice surface Temperature◎

5 K (vicarious val with other sat.
2K
data and climatology)

1K

Snow grain size of shallow layer○

100% (vicarious val with50%
climatology between temp-size)

30%

Ocean

Ocean
color

In-water

Cryosphere

Status*1(vicarious val withother sat. data)

Surfaceproperties*1 Symbols denote as follows; 〇: the release threshold achieved, ◎: the standard accuracy achieved, ☆: the target accuracy achieved.

6-5Schedule for the version-up of SGLI products
H28

H30

H29

H32

H31

H33

H34

10-11-12 1 - 2 - 3 4 - 5 - 6 7 - 8 - 9 10-11-12 1 - 2 - 3 4 - 5 - 6 7 - 8 - 9 10-11-12 1 - 2 - 3 4 - 5 - 6 7 - 8 - 9 10-11-12 1 - 2 - 3 4 - 5 - 6 7 - 8 - 9 10-11-12 1 - 2 - 3 4 - 5 - 6 7 - 8 - 9 10-11-12 1 - 2 - 3 4 - 5 - 6 7 - 8 - 9 10-11-12 1 - 2 - 3

Development of prelaunch algorithm
Review for theDevelopment
Completion

Sensor operation
Cal.※

Review for the Ver.1 datarelease (minimum success)

GCOM-C launch

Initialcheck-out

Evaluation of the sensor
performance

Review for the Ver.2
data release

Ver.1

First-Light

Postnormal
operation

Improvement and validation of algorithms

Initial Cal/Val

Review for the Ver.3
data release

Ver.2

Initial Cal.

Ver.3 Final review for the full& extra success

Normal Operation

Cal. For the Ver.1

Cal. For the Ver.2

Post-normal
operation

Cal. For the Ver.3

Cal. Coef.
Determination
Vi-calobs. data

Ground system
Algo. Development& Improvement

Val.
In-situ obs.

Proc.test

Coef.
Algo. Improvements for Ver.1 fixing
Evaluation ofthe accuracy

Ver. processing

Ver.1 processing
Proc.test

Re‑processing of thepast data

Ver.3 processing
Proc.test

Algo. Improvements for Ver.2

Re‑processingof the past
Algo.
Improvements for Ver.3
data

Val. For the Ver.2

Val. For the Ver.3

Re‑processing of
the past data

Tuningcoef.

Val. For the Ver.1

Val. For the final review

地上データ

Field campaigns for theVer.1 data release

Field campaigns for the Ver.2-3 data release

Field campaigns forthe final review

6-6