Progress Report

GCOM-CTANAKA, Kazuhiro
GCOM project manager
Joint PI Workshop Jan 20, 2022

1

GCOM-C update◼ Successful launch on Dec. 23, 2017
◼ SGLI First Light on Jan. 1, 2018. → stable operation for 4 years◼ SGLI ALL 29 products are in public since Dec. 20, 2018 (Ver.1 release)◼ Ver.3 data release on Nov. 29, 2021 as planned

Everything is nominal
as planned.
→ Post routine operation
Phase review is plannedat the end of 2022

GCOM-C Launch
H-IIA rocket F-37
01:26:22 UTCOn Dec. 23, 2017Japanese name“SHIKISAI”

2

Satellite operation in 2021◆ Satellite and ground system are stable since launch.
Satellite System

NormalTTC-RF, MDHS-RF

NormalMDHS-DH

Tentative stop of MDR operation No MDR recording for 16hours
on Nov. 27, 2021
Radiation effect is suspected

TTC-DH

NormalAOCS, RCS

NormalEPS, PDL

NormalTCS

NormalSGLI VNR

NormalSGLI IRS

NormalRegularly TIR health check for noisy
detectors with 3 months interval

Ground System

NormalVer.3 release and re-processing

Satellite & ground system information such as products, status and obs. plan is available
at “SHIKISAI Portal”. https://shikisai.jaxa.jp/index_en.html
3

SGLI Calibration

VN & SW Cal. Coefficients isreflected to products
since Ver.2 data processing◆Lunar, Solar & LED(& Halogen) Cals are consistent for VNR & SWI.
◆TIR is calibrated using black body & deep space in real time,degradation is very small.
LL1B(λ) = Lorig(λ) / (1.0 + kvt(λ) * D)kvt(λ): calibration constant from SGLI/GIRO time series comparison
D: days from 00:00 1st Jan. 2018

4

GCOM-C satellite orbit in 2021
 Successful inclination and de-acceleration maneuver to maintain40Nominal

0

Lauch+ 5 years

lon. error
manouver
PATH JUMP-20-40-80

Oribital debris←East-100

Inclinationde-accelation-120

2018/01/01

2019/05/16

2020/09/27

2022/02/09

2023/06/24

2024/11/05
Local Sun Time
Local Sun Time (predict)

10:25:00

manouver10:20:00
Inclinationde-accelation

10:15:00

2018/01/01

2019/05/16

2020/09/27

Routine Operation Phase (5 years)

2022/02/09

2023/06/24

2024/11/05←Morning

Local Sun Time

10:30:00

Noon→

-60

Nominal＋１

longtitude error [km]

20

as of
End of Oct. 2021

West→

Local Sun Time within 10:15-10:26 frame in June-July 2021.

Post-Routine Operation Phase
5

GCOM mission target✓ GCOM is long term observation mission aiming over 13 years.
GCOM Mission

Sat Obs.
GCOM-W

GCOM-C

Model

GCOM Obs.

Earth System ModelRadiation• Cloud, Aerosol• Reflectance （LULC)• Snow & Ice• Surface Temp

Carbon Cycle• Vegetation• Land Cover• Chllophyl-a• Coastal Change

GlobalObservation

Target-1:
Data
Utilization

Water Cycle• Water Vaper, Cloud• Precipitation• Soil Moisture• Snow and Ice• Surface Temp. Winds

Climate Change
Model Pred.

雪氷Temperature
Sea Level
Snow & Ice
Env. Change

陸 海• Precipitation• Extreme Weather• Land Use Change

大気
対流圏界面

datacomp

Modeling
Parameterization
Prediction

Target-2:
Env. Monitoring
Process Study

Target-3:
Earth System
Model6

Data Utilization➢ GCOM-C data is now delivered andutilized in many users includinginternational partners, local governments
and RS data platformers.
➢ G-Portal, JASMES & SHIKISAI portal sites
delivers practical data, such as inner bay
monitor, harmful algal blooms, sea ice,
volcanic eruption, drifting pumice … etc.

Fishery organizations
with GCOM-Cmonitoring web page.
https://shikisai.jaxa.jp/SuisanRiyou/index.html

7

Env. monitoring & process study➢ EORC/RA research framework is successful.
➢ Many environmental monitoring and process studies using
SGLI data has already been activated and discussed.
➢ ECVs generation is also considered for IPCC/GCOS
contribution.

Ver.3
AGB

Mukai et al. (2020)

Niwano et al. (2018)8

Collaboration between

model research and satellite earth observation
To the next phase, the integrated model research program (TOUGOU) and JAXA earth
observation research groups are planning to enhance collaboration to investigate theglobal warming issues more effectively
SatelliteModel(including GCOM-C)(TOUGOU, ..)TOUGOU: Integrated research programfor advancing climate models
Theme A: Prediction and Projection of Large-Scale
Climate Changes Based on Advanced ModelDevelopment
Theme B: Sophisticated Earth system model forevaluating emission reductions needed Themes C and D: Integrated Climate Change Projection
and Integrated Hazard Prediction

JAXA: Satellite product development

Collaboration
 Obs. data analysis

Aerosol and cloud: use of SGLI NUV andpolarization channels

 Model evaluation

Land vegetation: temporal change (phenology),and above-ground biomass

 Parameter constrain
by satellite obs.

Ocean phytoplankton: distribution, types, andprimary productionSnow/ice: distribution and albedo

On-going collaborative researches:✓ Comparison of variables characterizing the aerosol-cloud system (EORA2 GCOM-C PI: Suzuki, Tokyo Univ)✓ Seasonal change (phenology) of land vegetation; and distribution of ocean phytoplankton (EORA2GCOM-C PI: Tachiiri, JAMSTEC)✓ Ice sheet observation and modeling (EORA2 GCOM-C PI: Aoki, NIPR, ArCS II)To the next phase:• Increase collaboration research targets (e.g., carbon budget, climate sensitivity..)• Increase visibility of the collaboration

9Schedule Post routine operation phase review is planned at the end of thisyear2017

2018

Dec.23▲
Launch▲Jan.01
Fist Light20192020

2021

▲
Ver.2

▲
Ver.1

2022
▲
Ver.3

NOW▽

△PI W.S. 2020

△PI W.S. 2021

Data
Processing

Ver.1

Ver.2

Data
Re-Processing

Ver.1

Ver.2

EORA1

EORA2

2024

2025

▲
Review
Post-Routine
Operation Phase

Routine Operation Phase (5 years)
Dec.20 △GCOM Sympo.

2023△PI W.S. 2022Ver.3
Ver.3

EORA3

10

Summary GCOM-C satellite and ground system are stable.
 GCOM-C 4 years data has been provided to the public

continuously since Dec. 20, 2018.
 GCOM-C routine phase operations is 5 years(Dec. 2017 – Dec. 2022)
 GCOM mission is in the execution phase Encouragement to the practical use for the social benefits.
 Encouragement to the env. monitoring, process study andclimate model research for GCOM mission.

Thank you
Shikisai@ml.jaxa.jp
https://shikisai.jaxa.jp/index_en.html
11