110214_GCOM.ppt

February 2011 Demonstrate long-term global observation of various geophysical parameters
for understanding climate variability and water cycle.
 Two medium-sized satellites, three generations with one year overlap toensure 10-15 years stable data records.
 Cooperation with climate models and direct contribution to operational users.
Main responsibility of JAXA

Cooperation with the climate
model research institutions

GCOM-CGCOM-W

Atmosphere

Input

Cryosphere

Satellite observation

Comparison

Model prediction

Land

OceanData

Knowledge

Scenario

Operational use

Monitoring and understanding ofthe Earth environment change

Policy design2 GCOM consists of GCOM-W and GCOM-C series- GCOM-W with AMSR2 (Advanced Microwave Scanning Radiometer2)
and its follow-on will contribute to the observations related to global
water and energy circulation.
- GCOM-C with SGLI (Second-generation Global Imager) and its followon will contribute to the surface and atmospheric measurements
related to the carbon cycle and radiation budget.

 GCOM is long-term mission to observe more than 10 years.
- Three consecutive generations of satellites with one year overlap inorbit enables over 13 years observation in total.
１year
GCOM-W1
Launch
JFY2011

１year
GCOM-W2(JFY2015)

GCOM-C1

GCOM-W3(JFY2020)

GCOM-C2
Launch
JFY2014(JFY2018)

GCOM-C3(JFY2022)

3GCOM-W1 (Water)
Instrument

Advanced Microwave Scanning Radiometer-2

GCOM-C1 (Climate)
Instrument

Second-generation Global Imager

Orbit

Sun Synchronous orbit
Altitude：699.6km (on Equator)
Inclination: 98.2 degrees
Local sun time: 13:30+/-15 minOrbit

Sun Synchronous orbit
Altitude：798km (on Equator)
Inclination: 98.6 deg.
Local sun time: 10:30+/- 15min

Size

5.1m (X) * 17.5m (Y) * 3.4m (Z) (on-orbit)

Size

4.6m (X) * 16.3m (Y) * 2.8m (Z) (on orbit)

Mass

1991kg

Mass2093kg

Power gen.

More than 3880W (EOL)Power gen.

More than 4000W (EOL)

LaunchJFY 2011 by H-IIA Rocket

LaunchJFY 2014 by H-IIA Rocket

Design Life5-years

Design Life5-years4

Atmosphere

C

Radiation
Budgetaerosol
properties
snow
ice
distributionsnow
surfaceproperties

Cryosphere

cloud
properties
cloud
liquid
water

snow
depth

snow
surface
temp.

land
cover

water
vaporprecipitation

sea iceconcentration.
sea
surfacetemp.

land
surfaceLand
temperaprimaryture
productionsoil
moisturesea
surface
wind
speed
ocean
color

C

CarbonCycle

abovegroundbiomass

PAR

Ocean

W
Water &Energy
Cycle

5

AMSR2

 Deployable main reflector system with
2.0m diameter.
 Frequency channel set is identical to thatof AMSR-E except 7.3GHz channel for
helping RFI mitigation.
 Two-point external calibration with the
improved HTS (hot-load).
 Deep space calibration maneuver to checkconsistency between main reflector andCSM.
 Add a redundant momentum wheel toincrease reliability.

AMSR-EAMSR2 Channel Set

GCOM-W1/AMSR2 characteristics
CenterFreq.
[GHz]

Bandwidth[MHz]

6.925/
7.3

350

Incidence angle Nominal 55 degrees

10.65

100

Digitization

18.7

200

23.8

400

36.5

1000

0.35 (7 x 12)

89.0

3000

0.15 (3 x 5)

Scan and rate

Conical scan at 40 rpm

Antenna

Offset parabola with 2.0m dia.

Swath width

1450km12bitsDynamic range 2.7-340K
Polarization

Vertical and horizontalPol.

Beam width [deg](Ground res. [km])Sampling
interval[km]

1.8 (35 x 62)
VandH

1.2 (24 x 42)
0.65 (14 x 22)

100.75 (15 x 26)
5 6Page6SGLI channels

shortwave & thermal
InfraRed (T) Scanner (IRS)
Polarization(along-track slant)
radiometer (P)

SGLI : Second
generation GLobal
ImagerVisible & Near infrared pushbroom Radiometer (VNR)

GCOM-C SGLI characteristics
Push-broom electric scan (VNR: VN & P)
Scan
Wisk-broom mechanical scan (IRS: SW & T)
1150km cross track (VNR: VN & P)
Scan width
1400km cross track (IRS: SW & T)
Digitalization 12bit
Polarization 3 polarization angles for P
Along track
Nadir for VN, SW and T,
direction+45 deg and -45 deg for P

On-board
calibration

VN: Solar diffuser, Internal lamp (PD), Lunar by pitch
maneuvers, and dark current by masked pixels andnighttime obs.
SW: Solar diffuser, Internal lamp, Lunar, and darkcurrent by deep space window
T: Black body and dark current by deep space window
All: Electric calibration

λCH

Δλ

Lstd

Lmax

VN, P: W/m2/sr/µm
T: Kelvin

nm

IFOVm

VN13801060210250

VN24121075250250VN3443

1064400

250

VN44901053120250

VN55302041350250

VN6565203390250

VN7673.5202362250

VN8673.52025210250

VN9763

1240350

1000

VN10868.5

20830

250

VN11868.5

2030300

250

SW1105020572481000

SW21380

2081031000

SW31630200

350250

SW4221050

1.9201000

T110800

740

300

340

500

T212000

740

300

340

500

P1673.52025250

1000

P2868.52030300

1000

7Integrated water vapor

Integrated cloud liquid water

Sea surface wind speed

Precipitation

8Sea Surface Temperature

Precipitation

Sea Surface Wind Speed

Soil Moisture Content

Total Precipitable Water

Snow Depth9250m Ocean color chlorophyll-a and NDVI simulated using GLI 250m channels(a) GLI 1km Osaka Bay(1 Oct. 2003, CHL by LCI)(b) GLI 250m Osaka Bay(1 Oct. 2003, CHL by LCI)SGLI 250m resolution will enable to detect more fine structure in thecoastal area such as river outflow, regional blooms, and small current.
Hiroshi Murakami, Mitsuhiro Toratani and Hajime Fukushima, Satellite ocean color observation with 250 m spatial resolution
using ADEOS-II GLI, Remote Sensing of the Marine Environment, Proceedings of SPIE, Volume 6406-05, Nov. 28, 2006

10

500m resolution of TIR↓ASTER-original(a) 90m

SGLI-option*Enables detection of finestructures such as land andcoastal water surface
temperature influenced by thecity and the river flows.

(b) 250m* SGLI has TIR observation

with 250m spatial resolution
as a optional capability.

SGLI-standard(c) 500m(d) 1km

Simulated thermal infrared images using ASTER data over Tokyo
Bay in the night on August 4, 2003.

11

12