POST-LAUNCH VALIDATION OF GCOM-C /SGLI GEOPHYSICAL PRODUCTS

JAXA Earth Observation Research Center

GCOM-C/SGLI instrumentSGLI channels

CH

l Dl Lstd Lmax SNR at Lstd IFOV

VN, P, SW: nmT: mm

VN, P: W/m2/sr/mm

T: Kelvin

VN, P, SW: -

T: NEDTm

VN1 380 10 60 210 250 250VN2 412 10 75 250 400 250VN3 443 10 64 400 300 250VN4 490 10 53 120 400 250VN5 530 20 41 350 250 250VN6 565 20 33 90 400 250VN7 673.5 10 23 62 400 250VN8 673.5 20 25 210 250 250VN9 763 12 40 350 400 250

VN10 868.5 20 8 30 400 250VN11 868.5 20 30 300 200 250

P1 673.5 20 25 250 250 1000P2 868.5 20 30 300 250 1000

SW1 1050 20 57 248 500 1000SW2 1380 20 8 103 150 1000SW3 1630 200 3 50 57 250SW4 2210 50 1.9 20 211 1000T1 10.8 0.74 300 340 0.2 250/500T2 12.0 0.74 300 340 0.2 250/500

Multi-angle obs. for λ= 670nm and 865nm

Along track

Multi-channel Obs. @Nadir (17 chs) Swath: 1150km (VN, P)1400km (SW, T)(250m resol.: 11chs, 500m resol.:

2 chs, 1km resol.: 4chs） 250m over land & coastal sea

Forward(+45 deg.)

Backward(-45deg.)

Nadir

Visible and Near-infrared Radiometer

(VNR)

InfraRed Scanner (IRS) (SW1-T2)

Non-polarization telescopes (VN1-11)

Polarization (along-track slant) telescopes (P1-2,three pol. angles)

SGLI can cover the whole globe every 2days 2

GCOM-C was successfully launched

from TanigashimaSpace Center on

December 23rd 2017

Daily coverage of GCOM-C/SGLI Jan. 1, 2018

The new SGLI features: 250m (VNIR) and 250&500m (TIR)

channels and two polarization / multi-direction channels (P).

Land [S:9, R:5]Surface reflec-tance

Precise geometric correctionAtmospheric corrected reflectance

Vegeta-tion and carbon cycle

Vegetation indexAbove-ground biomassVegetation roughness indexShadow indexFraction of Absorbed Photosynthetically available radiationLeaf area index

Tempera-ture Surface temperature

Applica-tion

Land net primary productionWater stress trendFire detection indexLand cover typeLand surface albedo

Atmosphere [S:8, R:3]

Cloud

Cloud flag/Classification Classified cloud fraction Cloud top temp/heightWater cloud optical thickness /effective radiusIce cloud optical thicknessWater cloud geometrical thickness

Aerosol

Aerosol over the ocean Land aerosol by near ultra violet Aerosol by Polarization

Radia-tion

budget

Long-wave radiation flux

Short-wave radiation flux

Cryosphere [S:4, R:8]

Area/ distribu-

tion

Snow and Ice covered areaOkhotsk sea-ice distributionSnow and ice classificationSnow covered area in forest and mountain

Surface proper-

ties

Snow and ice surface TemperatureSnow grain size of shallow layerSnow grain size of subsurface layerSnow grain size of top layerSnow and ice albedoSnow impurityIce sheet surface roughness

Bounda-ry

Ice sheet boundary monitoring

Common （Level-1)

Radiance TOA radiance (including system geometric correction)

Ocean [S:7, R:7]

Ocean color

Normalized water leaving radianceAtmospheric correction parameterPhotosynthetically available radiationEuphotic zone depth

In-waterChlorophyll-a conc.Suspended solid conc.Colored dissolved organic matter

In-water Inherent optical propertiesTempera

-ture Sea surface temperature

Applica-tion

Ocean net primary productivityPhytoplankton functional typeRedtidemulti sensor merged ocean colormulti sensor merged SST

Blue: Standard products [L1: 1 product, L2: 28 products]Pink: Research products [L2: 23 products]

GCOM-C/SGLI Products

Level-2

4

Accuracy Requirements and Validation Methods for Land products標準プロダクトStandard Product

日照域・全日別Day/Night

分解能Resol.

精度目標 Accuracy Targets 主な検証手段

Validation MethodsPriority

リリースRelease

標準Standard

目標Goal Release Standard Goal

精密幾何補正済放射輝度Precise geometric correction

全日Day&Night 250m <1pixel <0.5pixel <0.25pixel ・GCP database derived from AVNIR-2 etc. ◎ ◎ ◎

大気補正済陸域反射率 (雲検知含む)Atmospheric corrected reflectance (incl. cloud detection)

地上日照域Daytime only

250m0.3 (<=443nm), 0.2 (>443nm) (scene)*11

0.1 (<=443nm), 0.05 (>443nm) (scene) *11

0.05 (<=443nm), 0.025 (>443nm) （scene）*11

・In-situ observation ◎ ◎ ◎

- Sim. of SR with BiRS ○ ○ ○

- Other Sat. (MODIS, VIIRS etc.) △ △ △

250m

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

Grass：20% (scene), Forest：15% (scene)

Grass：10% (scene), Forest：10% (scene)

・In-situ observation ◎ ◎ ◎植生指数Vegetation index - Other Sat. (MODIS, VIIRS etc.) ○ △ △

1km Grass： 50%, Forest： 100%

Grass：30%、Forest：50%

Grass：10%, Forest：20%

・In-situ observation@ 500mx500m site ◎ ◎ ◎

地上部バイオマスAbove-ground biomass

Ecological Model (BEAMS) ○ ○ ○

- Other Sat. (MOLI, GEDI, PALSAR2, other SARs etc.) ○ △ △

植生ラフネス指数Vegetation roughness index 1km Grass･Forest：

40% (scene)Grass･Forest：20% (scene)

Grass･Forest：10% (scene) ・In-situ observation ◎ ◎ ◎

カゲ指数Shadow index

250m, 1km

Grass･Forest：30% (scene)

Grass･Forest：20% (scene)

Grass･Forest：10% (scene)

・In-situ observation ◎ ◎ ◎

- Other Sat. (MODIS, VIIRS etc.) △ △ △

光合成有効放射吸収率fAPAR 250m Grass： 50%,

Forest： 50%Grass：30%、Forest：20%

Grass：20%, Forest：10%

・In-situ observation@ 500mx500m site ◎ ◎ ◎

- Other Sat. (MODIS, VIIRS etc.) ○ × ×

葉面積指数Leaf area index 250m Grass： 50%,

Forest： 50%Grass：30%、Forest：30%

Grass：20%, Forest：20%

・In-situ observation@ 500mx500m site ◎ ◎ ◎

- Other Sat. (MODIS, VIIRS etc.) ○ × ×

地表面温度Surface temperature

全日Day &Night 500m Less than 3.0K

(scene) （気温）

Less than 2.5K (scene) （放射）

Less than 1.5K (scene) （放射）

・In-situ observation ◎ ◎ ◎

- LST derived from Tair at Tower sites,automated on Cal/Val web △ △ △

- Other Sat. (MODIS, VIIRS etc.) ○ × ×

◎: Primary data, ○: Secondary data△: Auxiliary data

Accuracy Requirements and Validation Methods for Atmosphere products ◎: Primary data, ○: Secondary data△: Auxiliary data

標準プロダクトStandard Product

日照域・全日別Day/Night

分解能Resol.

精度目標 Accuracy Targets 主な検証手段Validation Methods

PriorityリリースRelease

標準Standard

目標Goal Release Standard Goal

雲フラグ･タイプCloud flag/Classification

全日Day & Night 1km 10% Evaluated as the cloud fraction

product- Cloud amount from sky-camera based on BI-SI

method ◎ △ △

雲種別雲量Classified cloud fraction (Classified CF)

地上日照域Daytime only

Scene: 1km,Global: 0.1deg.

20% (as solar rad.) (*9)

15% (as solar rad.) (*9)

10% （as solar rad.) (*9)

- Irradiance obs. from BSRN, Skynet etc. ◎ ◎ ◎- Climatology from ISCCP etc.- Classified CF from sky-camera ○ △ △

雲頂温度･高度Cloud top temp/height

全日Day & Night 1K （*4）

3K(*5)/2km (*5) 1.5K/1km (*5)

- RS data from ground, airborne, and other satellites (lidar, radar, radiometer △ ◎ ◎

- Cal of TIR bands & JMA Objective analysis data ◎ - -

水雲光学的厚さ･粒径Water cloud OT/effective radius

地上日照域Daytime only

10%/30% (as COT, Re) (*6：other sat.)

100% (as CLW) (*7：PMR on the ground)

20% (as COT, *8) / 50% (as CLW) (*7)

・In-situ obs. of CLW by Skynet PMR △ ◎ ◎

・In-situ obs. of COT by Skynet sky-radiometer △ △ ◎- Other Sat. (MODIS, VIIRS etc.) ◎ △ △

30% (*6：other sat.) 70% (*8) 20% (*8)

・In-situ obs. of COT by Skynet sky-radiometer △ ◎ ◎氷晶雲光学的厚さIce cloud optical thickness

- Other Sat. (MODIS, VIIRS etc.) ◎ △ △

海洋上エアロゾルAerosol over the ocean

0.1(monthly aveta_670,865) )(*10)

0.1(scene’s ta_670,865)(*10)

0.05(scene’s ta_670,865)

・In-situ obs. of AOT by Skynet sky-radiometer △ ◎ ◎

- Other Sat. (MODIS, VIIRS etc.) ◎ △ △陸上エアロゾル(近紫外)Land aerosol by near ultra violet (ta@380nm)

0.15(monthly ave. ta@ 380nm for UV, 670& 865nm for Pol) )(*10)

0.15(scene aveta @380nm for UV, 670&865nm for Pol)(*10)

0.1(scene’s ta@ 380nm for UV, 670& 865nm for Pol )

・In-situ obs. of AOT by Sky-radiometer △ ◎ ◎

陸上エアロゾル(偏光)Aerosol by Polarization - Other Sat. (MODIS, VIIRS etc.) ◎ △ △

Accuracy requirements for Ocean products標準プロダクトStandard Product

日照域・全日別Day/Night

分解能Resol.

精度目標 Accuracy Targets 主な検証手段

Validation MethodsPriority

リリースRelease

標準Standard

目標Goal Release Standard Goal

正規化海水射出放射輝度Normalized water leaving radiance

地上日照域

Daytime only

Coast (Cst): 250m

Open Ocean (OO): 1km

Global:4-9km

60% (443~565nm)

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

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

・In-situ observation ◎ ◎ ◎- Temporal variation of SGLI nLw, automated on Cal/Val web △ △ △

- Other Sat. (MODIS, VIIRS etc.) ○ ○ ○大気補正パラメータAtmospheric correction param

80% (AOT@865nm)

50% (AOT@865nm)

30% (AOT@865nm)

・In-situ observation ◎ ◎ ◎

- Other Sat. (MODIS, VIIRS etc.) ○ ○ ○光合成有効放射量Photosynthetically available radiatioin

20% (10km/M) 15% (10km/M)

10% (10km/M)

・In-situ observation ◎ ◎ ◎

- Other Sat. (MODIS, VIIRS etc.) ○ ○ ○

クロロフィルa濃度Chlorophyll-a concentration

-60~+150%(OO) -60~+150%

-35~+50% (OO), -50~+100% (Cst)

・In-situ observation ◎ ◎ ◎

- Other Sat. (MODIS, VIIRS etc.) ○ ○ ○懸濁物質濃度Suspended solid concentration

-60~+150% (OO) -60~+150% -50~+100%

・In-situ observation ◎ ◎ ◎

- Other Sat. (MODIS, VIIRS etc.) ○ ○ ○有色溶存有機物吸光係数Colored dissolved organic matter

-60~+150% (OO) -60~+150% -50~+100%

・In-situ observation ◎ ◎ ◎

- Other Sat. (MODIS, VIIRS etc.) ○ ○ ○

海面水温Sea surface temperature

全日Day & Night

Coast: 500mOther: same as above

0.8K (Daytime only)

0.8K (Day & Night)

0.6K (Day & Night)

・In-situ SST obtained from iQuam, automated on Cal/Val web ◎ ◎ ◎

- Other Sat. (MODIS, VIIRS etc.) △ △ △・In-situ observation ○ ○ ○

◎: Primary data, ○: Secondary data△: Auxiliary data

7

Accuracy requirements for Cryosphere products標準プロダクトStandard Product

日照域・全日別Day/Night

分解能

精度目標 Accuracy Targets 主な検証手段

Validation MethodsPriority

リリースRelease

標準Standard

目標Goal Release Standard Goal

積雪･海氷分布Snow and Ice covered area

地上日照域

Daylight

Scene: 250m, Global: 1km

10% 7% 5%- DCDF snow depth only over land,

automated on Cal/Val web ○ ○ ○- Other Sat. (MODIS, VIIRS, Landsat-8

etc.) ◎ ◎ ◎

オホーツク海海氷分布OKhotsk sea-ice distribution

250m 10% 5% 3%・Other Sat. (MODIS, VIIRS, Landsat-8

etc.) ◎ ◎ ◎

・Photos etc. (Aerial photos, hand-drawn ice map) △ △ △

雪氷面温度Snow and ice surface Temperature

Scene: 500m,

Global:1km

5K 2K 1K

・Tsurf from SIGMA, BSRN AWS@ Greenland, Dome-C etc., automated on Cal/Val web

○ ◎ ◎

・In-situ observations @Greenland, Svalbard etc. ○ ○ ○

・Other Sat. (MODIS, VIIRS, Landsat-8 etc.) ◎ △ △

浅層積雪粒径Snow grain size of shallow layer

100% 50% 30%

・Auto-Optical Measurements @Hokkaido, Svalbard etc.） ○ ○ ○

・In-situ observations @Greenland, Hokkaido, Svalbard etc. (campaign) ○ ◎ ◎

・Other Sat. (MODIS, VIIRS, Landsat-8 etc.) ○ △ △

・Vicarious Val. with Climatology of Temp-Grain size relation ◎ ○ ○

◎: Primary data, ○: Secondary data△: Auxiliary data

PI’s site

AsiaFlux/PEN sites

CEOS/RadCALNET

PI’s sites

Validation Method:- Accuracy targets were defined as RMSE evaluated with the in-situ measured reflectances acquired at the

ground surface with moderate reflectance of around 0.2 at solar zenith angles less than 30 degrees. - In addition, the release threshold is defined as the value acquired at the condition of aerosol optical depth

(at the wavelength of 500 nm) less than 0.25.

Validation data and condition etc.:- In-situ data measured within the time difference of 1-1.5 hours from SGLI observation at the 9 sites shown

below (for the period during Jan. 24 to Sep. 28, 2018)

Validation Results of Land ProductsAtmospherically corrected reflectance (RSRF)

0.01536%

0.01326%

0.01423%

0.01723%

0.02120%

0.02727%

0.02619%

0.07627%

0.03631%

0.0369%

0.08327%

0.03411%

0.06220%

Evaluated with in-situ measured flux reflectances because in-situ BRDF observations are difficult on the ground within 1 km x 1km field of view.

0.0329%

Validation Results:

Estimated errors Release threshold Standard accuracy Goal accuracy

0.019(<=443nm)0.084 (>443nm)

0.3 (<=443nm) ®150%0.2 (>443nm) ®100%

0.1 (<=443nm) ®50%0.05 (>443nm) ®25%

0.05 (<=443nm) ®25%0.025 (>443nm) ®13%

Release threshold is achieved

Validation Results of Land ProductsAtmospherically corrected reflectance (RSRF)

SGLI Atmospherically corrected reflectance (RSRF)

May 01-31, 2018(BRDF corrected monthly average)

Geometric Errors in NDVI (L3Map) Period: from Jan. 1st 2018 to June 19th 2019

May 01-31, 2019

Validation Method:- Accuracy targets are defined as the relative error (RE) of “solar radiation on the ground”

derived from SGLI cloud products including CLFR (indirect validation). The REs are evaluated by comparing SGLI-derived solar radiation, which is monthly average for every 0.1 degree global grids, with in-situ measured solar radiation (monthly average).

Validation Data and Condition etc.:- Solar radiation was derived using SGLI cloud related products, i.e., cloud flag (CLFG), cloud

properties (CLPR), atmospherically corrected land surface reflectance (RSRF) , and ancillary data (meteorological data, elevation etc.).

- When comparing with in-situ data, only the data meeting the following conditions were used;- The time difference between SGLI and in-situ observation was less than 5 minutes.

Validation Period:- BSRN ： Jul. 1st to Oct. 31st 2018 for 22 sites (4 months)- SKYNET ： Jul. 1st to Oct. 31st 2018 for 3 domestic sites (4 months)

Validation Results of Atmosphere ProductsClassified Cloud Fraction (CLFR)

Validation Results:

Release threshold, Standard and Goal accuracies are achieved*（*Standard and Target accuracies of cloud flag/classification product are also achieved）

Monthly averageSupplemental: Non-monthly average (Daily)SGLI: 0.1 deg. Grid average vs. In-situ instantaneous values

Estimated errors Release threshold Standard accuracy Goal accuracy

10 % (as solar radiation) 20% (as solar radiation) 15% (as solar radiation) 10% （as solar radiation)

Validation Results of Atmosphere ProductsClassified Cloud Fraction (CLFR)

SGLI Cloud Fraction

May 01-31, 2019

Location of buoy data

Validation Method:- Overall RMS errors are evaluated comparing SGLI derived SST with those derived from

buoy measurements obtained from iQuam.

Validation Data and Condition etc.:- In-situ buoy data acquired within the spatial difference of 10 km and time difference of 2 hours from SGLI

observations were used for comparison. - In addition, before the comparison, the SGLI SSTs that meet the following conditions were selected;

1. Standard deviation of SGLI SST within 5 x 5 pixels around the buoy location is less than 1.0 ℃.2. The difference between maximum and minimum of SGLI SSTs within the 5x5 pixel box is less than 3.0 ℃.3. The difference between SGLI SST and iQuam SST is less than 5 ℃.

Validation Period:- Oct. 1st to 31st 2018

(1 month).

Validation Results of Ocean ProductsSea Surface Temperature (SST)

RMSE: 0.41℃ RMSE : 0.50℃

Daytime NighttimeValidation Results:

Estimated errors Release threshold Standard accuracy Goal accuracy0.4℃ (day)

0.5℃ (night) 0.8℃ (day) 0.8℃ 0.6℃

Release threshold, Standard and Goal accuracies are achieved

Validation Results of Ocean ProductsSea Surface Temperature (SST)

SGLI Sea Surface Temperature

May 01-31, 2019

deg.C

Validation Method:- Release threshold: Overall RMS errors are evaluated comparing SGLI derived SIST with those from

other satellite products.- Standard accuracy: RMS errors are evaluated comparing SGLI SIST with those from in-situ thermal

radiometer measurements on the ground.

Validation Data and Condition etc.:- Data source of other satellite: MODIS MOD11A1 IST products- Data source of in-situ data: In-situ measured thermal radiometer data installed at the PROMICE

Automatic Weather Stations (AWS) at Greenland. The in-situ data acquired at within the time difference of 30 minutes from SGLI observations are used.

Validation Period:- Jul. 1st to Sep. 30th 2018 (3 months)

Validation Results of Cryosphere ProductsSnow and Ice Surface Temperature (SIST)

Validation Results:

Estimated errors Release threshold Standard accuracy Goal accuracy

Other sat.: 2.6KIn-situ: 1.5K 5K （vs. other sat.） 2K （vs. in-situ） 1K （vs. in-situ）

[K]

MOD11A1

C2AB_SIST

RMSE = 2.6KBias = 0.25K

Release threshold and Standard accuracy are achieved

For the release threshold evaluation (vs. MODIS product)

For the standard accuracy evaluation(vs. AWS measurements)

別1 - 19

Validation Results of Cryosphere ProductsSnow and Ice Surface Temperature (SIST)

Snow surface temperature(Ver.1.001*)

Snow grain size of shallow layer(Ver.1.001*)

SGLI Snow Cover and Snow Physical Variable Products

Snow Cover Distribution(Ver. 1.001*)

Apr. 07-222018

Apr. 07-222018

Apr. 07-142018

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

Summary of the Current Evaluation Status (1/2)La

nd

Surface reflectance

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 and carbon

cycle

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%

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

Atm

osph

ere

Cloud

Cloud flag/Classification ☆ 10% (with whole-sky camera) Incl. below cloud amount Incl. below cloud amount

Classified cloud fraction ☆ 20% (on solar irradiance) 15% (on solar irradiance) 10% (on solar irradiance)Cloud top temp/height ◎ 1 K 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%

aerosol

Aerosol over the ocean ○ 0.1 (Monthly ta_670,865) 0.1 (scene ta_670,865) 0.05 (scene ta_670,865)Land aerosol by near ultra violet ○ 0.15 (Monthly ta_380) 0.15 (scene ta_380) 0.1 (scene ta_380 )Aerosol by Polarization ◎ 0.15 (Monthlyta_670,865) 0.15 (scene ta_670,865) 0.1 (scene ta_670,865)

Area Group Product Status*1 Release threshold Standard accuracy Goal accuracy

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

Oce

an

Ocean color

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)

In-water

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%

temperature Sea surface temperature ☆ 0.8 K (daytime) 0.8 K (day & night time)

0.6 K (day & night time)

Cryo

sphe

re Area/ distribution

Snow and Ice covered area (incl. cloud detection) ○ 10% (vicarious val with

other sat. data)7% 5%

Okhotsk sea-ice distribution ○ 10% 5% 3%

Surface properties

Snow and ice surface Temperature ◎5 K (vicarious val with other sat. data and climatology) 2 K 1 K

Snow grain size of shallow layer ○100% (vicarious val with climatology between temp-size) 50% 30%

Area Group Product Status*1 Release threshold Standard accuracy Goal accuracy

Summary of the Current Evaluation Status (2/2)

Summary• SGLI Level-2 (L2) products of Ver. 1 have been released to the public from “the G-Portal”

since Dec. 20, 2018.

• The release thresholds (the first accuracy target) of all the SGLI L2 standard products

have been achieved, which corresponds to achieving “the Minimum Success”.

• In addition, the evaluation results indicate that nine (and three) L2 products have

already reached the levels of the standard accuracy for “the Full Success” (and the goal

accuracy for “the Extra Success”) at this stage.

• A remaining issue to be solved in Ver. 1 is the occurrence of geometric errors in tile

products noticeable around Europe and Africa from Jan. 1st 2018 to June 19th 2019.

• SGLI L2 products updated to Ver. 2 will be available in June 2020 (1.5-yr interval).

*G-Portal : https://gportal.jaxa.jp/gpr/index/index

https://gportal.jaxa.jp/gpr/index/index

Users can search SGLI products with “physical variable” or

“satellite name”

Heavy users can download the data from FTP server directly.

G-Portal Standard products are downloadable at ”G-Portal”

Current satellite status and user handbooks are available at “Product Information and Operation status”