The 9TH GEOSS Asia-Pacific Symposium
12 January, 2017, Tokyo

JAXA Earth Observation Satellites Program
for Water Information
Earth Observation Research Center
JAXA

JAXA’s Past, Current
and Future Satellite/Sensor Ac8vi8es

High Resolu4on Wide
Swath (Op4cal)

GOSAT-2(JFY2017)(JFY2019)

Earth CARE/CPR(JFY2017)

GCOM-C(JFY2016)

ALOS-2 SAR(JFY2014)

DAICHI (ALOS)(JFY2005)

GPM/DPR(JFY2013)

Aqua/AMSR-E(JFY2002)

ADEOS-Ⅱ(JFY2002)

SHIZUKU(GCOM-W)(2012)IBUKI (GOSAT)(2009)

TRMM/PR

JERS-1(JFY1997)(JFY1991)

MOS(JFY1986)GPM - Climate Change (Adaptation)
It is for the first time in the world for meteorological agencies to utilize
satellite radar precipitation data such as DPR for numerical prediction.
Global Precipitation Observation
at 3 Hour Intervals
with GPM Core Satellite (DPR + GMI )and Constellation Satellites (microwaveradiometers/sounders)Japan
MeteorologicalAgency

Core sat in cooperation with NASA

(Without DPR)

(With DPR)

Ground Radar Obs.

2

Ground radar calibration using spaceborne
precipitation radar
Bias adjustment of groundradar using the spaceborne
precipitation radar (GPM/DPR)

Composite of Satellite Radarand Ground Radar Data in thePHILIPPINES

Histogram of near-surface radarreflectivity for the ground radar and theDPR using 10 cases.
APPARI site

Bias:
+1.05

VIRAC site

Bias:
+2.21

P3

U8liza8on of Ogasawara Village (Bonin Islands) in Japan• A"er the mee)ng with the village oﬃcers, the Homepage of the Ogasawara
Village started to link to the JAXA/EORC GSMaP Homepage on April 2016.
hLp://www.vill.ogasawara.tokyo.jp/JAXA/EORC GSMaP Homepage

about 700 visits during
1month (Aug. 2016)

4

Overview of GSMaPMicrowave Imagers & Sounders

GPM-Core
GMI

Precipitation
Radars

GCOM-WAMSR2

GSMaP Microwave Radiometer
Retrieval Algorithm

Data
BaseTRMMPR

DMSP
SSM/I, SSMIS

Rainfall Data from each
Microwave Radiometer
Merged Microwave
Rainfall Data

GPM-Core
DPR（Okamoto et al. 2005, Kubota et al, 2007,
Aonashi et al. 2009, Ushio et al. 2009,
Shige et al. 2009, Kachi et al. 2011）

http://sharaku.eorc.jaxa.jp/GSMaP/NOAA/MetOp
AMSU

Good: high-frequent(wide swath, mul8satellites)
Bad: cannot
measure ver8cal
structure (need info.
from radar)

IRImagers

Geosta8onary
Satellites

Microwave-IR Merged
Algorithm (CMV, K/F)
Global Rainfall Map+ Gauge-calibrated
Rainfall Map(0.1 degree grid, Hourly）

Global Satellite Mapping of Precipitation (GSMaP)
using GCOM-W, GPM, and others (European and US satellites)

6

Typhoon No.8, July 8, 2014 (Daily Rainfall) calibrated by NTT-D (GSMaP-IF)
Ground Radar

GSMap(Corrected, ver2014)

GSMap(Original)

GSMap(Corrected, ver2015)

Flood Warning System (ADB TA project)Par)cipa)ng countries: Bangladesh, the Philippines, and Viet NamJAXA contributes to ﬂood
forecasSng using spacetechnology

Global Satellite Mapping ofPrecipita)on (GSMaP)

Calibra)onPrecipita)on Radar
Microwave Radiometer
Flood Forecasting
SystemRain Gauges

SMS distribu8on
systemFlood Warning••

Input to the ﬂood forecas8ng
model of GSMaP Precipita8on
data calibrated by rain gauges
on the ground
Improvement of the ﬂood warning lead)me from 3 days to 5 days. !Mi8ga8onof loss of assets and damages
Direct distribu)on of informa)on to thepeople by using cellular phones
8Future Idea: Satellite-based Water Disaster Management in emerging countries in Asia

<Background><Step 1> Asian Satellite Water Informa8on Center

1. Water Disasters; Shared issue in Asia
Tyhoon, Heavy Rain,Flood, and Drought• Establishment of regional center which provides satellite based informa)on andapplica)ons for water disaster management.
• Headquartered at XXX(TBD)• Funding from donors and member countries

GSMaP

ASWIC

2. Lack of Sustainable Ground-based Rainfall
Measurement in Emerging Countries
Lack of archive, maintenance andcalibra)on, and power shortage
3. Improved Capacity on Satellites in EmergingCountries> 1000 kg : THEOS 1(Thailand), Razaksat1(Malaysia), Lotusat 1(Viet Nam),
TeLEOS1(Sinagapore)> 100 kg: LAPAN A2 (Indonesia), Diwata-1(Philippines)

GroundData• Capacity development• Knowledge Sharing

GSMaPCalibra)onfor
Whole region<Step 2> Asian Small Precipita8on Radar Constella8on
ODA projects in eachcountry(iii) Userapplica)ons(i) Small Precipita)on forRadar Satellite System meteorology,hydorology,(ii) Strengthening(iv) Capacity
etc.
ground-based sensor Development
network

4. Available Satellite-based Rainfall Data
Free houly
rainfall data for10 km x 10 km
grid
Global Satellite Mapping of Precipita)on (GSMaP)

Applica)ons
for water
disaster mgt.

Users in eachcountry(Meteorologi
cal agencies,Hydrologicalagencies,etc.)

Exis)ng GPMConstella)on

ASPRC by Asiancountries
Orbit：Alt. 800km, inclina)on 20 deg.
Mass： Smaller than 800kg
Life)me： More than 5 years
Payload：Ku band precipita)on radar
Data：Precipita)on intensity (mm/h)
Swath： around 800㎞
Resolu)on：around 10km x 10km
Minimum detec)on：around 1mm/h
Frequency：ave. 4-6 )mes/ dayby four satellites

Improved GSMaP

ASWIC

Users
9

Our Visions• JAXA will further strive to enhance space development activities
under the new framework of the space strategy, focusing ontechnical innovation and international cooperation as on providing
effective solutions to the society as a whole.
• Specifically, in the field of application, JAXA values technologicaladvancement and continuous utilization of satellites for theimprovement of the daily lives for humankind as observation
infrastructure:ü Long-term observations by continual satellite missions
ü Multiple satellite data utilization
ü Involvement of the private sector• For the Earth Observation Satellites, JAXA will clarify our role in thesociety and develop the system to further collaboration withJapanese government and other implementing organizations, so that
we can realize the world which utilizes satellites to provide a benefitof human society as a part of observation infrastructure.

Looking forward to further fruitful collaboration
with our partners around the globe.

10