An Overview of Current Studies
and Future Plans for SIF
Research in the GOSAT Serie
Hibiki Noda, Yukio Yoshida, Makoto Saito,Hirofumi Ohyama, Tomoki Morozumi, Tsuneo Matsunaga

GOSAT Series
GOSAT (2009-)© JAXAGOSAT-2 (2018-)© JAXA

2GOSAT Series
GOSAT (2009-)© JAXAGOSAT-2 (2018-)© JAXAGOSAT-GW(FY 2024-)© JAXA

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SIF studies in GOSAT project© JAXA

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SIF studies in GOSAT project

Dr. Tomoki
Morozumi

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Canopy structure and SIF in deciduous forest
Deciduous Broadleaf Forest in Takayama, JapanMorozumi et al. (2023) Remote Sensing of Environment 284, 113340
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Contribution of SIF emitted from understory

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SIF studies in GOSAT project© JAXA

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SIF studies in GOSAT project© JAXA

10.5 km…but we have long-term data from 2009!
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GOSAT-SIF in Mongolian Plateau
The Mongolian steppe has been
suffering from severe drought forthe past decade.

We examined seasonal and annual
variaFons in GOSAT SIF inMongolian steppe
Kiyono and Noda et al. (2023) JGR Biogeoscience 128, e2022JG007074
10Effect of drought on SIF in Mongolian SteppeSoil water content at 5 cm depth (𝜃!"# ) vs. SIF

Blue: 𝜃!"# > 15.4%volWhite: 𝜃!"# < 15.4%vol

In Mongolian steppe, SIF is a good indicator ofsoil drought.
Kiyono and Noda et al. (2023) JGR Biogeoscience 128, e2022JG007074
11SIF and GPP estimation by SCOPE model
MODIS data

PROSAIL
model

SCOPE
model

Kiyono and Noda et al. (2023) JGR Biogeoscience 128, e2022JG007074

SIF

GOSAT SIF

GPP

Madani et al. (2014) have shown that MODIS GPP
is about 2/3 of eddy covariance data of grassland inNorthern America12GOSAT-GW
Global Observing SATellite for Greenhouse gases and Water cycle
AMSR-3(Advanced Microwave Scanning Radiometer)---> Water cycle

TANSO-3---> GHGs and SIF
Wide-mode

Focus-mode
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Speciﬁca/ons of GOSAT, GOSAT-2, and GOSAT-GWGOSAT (2009 -)GOSAT-2（2018 -）(Courtesy of JAXA)(Courtesy of JAXA)GOSATGOSAT-GW（FY2024 -）Wide Mode(Courtesy of JAXA)GOSAT-2

GOSAT-GW

Launch / lifetime

2009 / 5 years

2018 / 5 years

FY2024 / 7 years

Satellite mass / power

1.75 t / 3770 W

1.8 t / 5000 W

2.9 t / 5200 W

Orbit

666 km, 3 days,13:00, descending

613 km, 6 days,13:00, descending

666 km, 3 days,13:30, ascending

Spectrometer

FTS

FTS-2

TANSO-3 (Grating)Major targets

CO2, CH4

CO2, CH4, CO

CO2, CH4, NO2

Spectral bands

0.7 / 1.6 / 2 µm + TIR

0.7 / 1.6 / 2 µm + TIR

0.45 / 0.7 / 1.6 µm-1

GOSAT-GW（FY2024 -）(Courtesy of JAXA)
Focus Mode

Spectral Resolution(Sampling interval)

0.2 cm ,(≈ 0.01 nm @ 0.7 µm, ≈ 0.05 nm @ 1.6 µm)< 0.5 nm @ 0.45 µm, <0.05 nm @ 0.7 µm,< 0.2 nm @ 1.6 µm

SwathDiscrete, 1 – 9 points

Discrete, 5 points

Selectable, 911 km (Wide Mode) or 90 km (Focus Mode)

Footprint size, nadir

10.5 km

9.7 kmSelectable, 10 km (Wide Mode) or 1 – 3 km (Focus Mode)

Pointing±20 /±35 deg (AT/CT)±40 /±35 deg (AT/CT)± 40 /± 34.4 deg (AT/CT) for Focus Mode

Other instruments

CAI(Cloud and Aerosol Imager )CAI-2(Cloud and Aerosol Imager 2)

AMSR3(Advanced Microwave Scanning Radiometer 3)14area ofObserva/on plan of GOSAT-GW Observation
Wide Mode
Fine Mode coverage andland cover types
90 km

911 kmUrban aea

EBF

Paddy field

ECF

Crop land

Bare soil

GrasslandBambooDBF

Solar panel

DCF

GOSAT-GW would be helpful to deepen our understanding of the vegetaFon response to climate change.
15Thank you.
If you are interested in GOSAT series, check out our website
Informa(on of GOSAT Series
GOSAT
h3ps://www.gosat.nies.go.jp/en/GOSAT-2
h3ps://www.gosat-2.nies.go.jp/
GOSAT-GW h3ps://gosat-gw.nies.go.jp/en/
Satellite Observa(on Centerh3ps://www.nies.go.jp/soc/en/
Data ArchiveGOSAT
h3ps://data2.gosat.nies.go.jp/index_en.html
GOSAT-2
h3ps://prdct.gosat-2.nies.go.jp/
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