Xiang FangXiang FangNational Satellite Meteorological CenterNational Satellite Meteorological Center，， CMA CMA

Preparing for FYPreparing for FY--4A4A

Outline

1) Observation capability

2) System &Products

3) User preparedness

National Satellite Meteorological Center ,CMA 

FengYun

Geostationary Satellites Launch Plan

20 11

20 12

20 13

20 14

20 15

201 6

20 17

2018

20 19

20 20

20 21

20 22

20 23

20 24

20 25

FY-2G

FY-2H

FY-4A

FY-4C

FY-4B

Observation capability continuality

FY‐4A plan to be launched in 2016

Observation capability continuality

FY‐2 D/E/F operational positions 86.5E,105E and 112.0E             

Revision 201310

Coverage 2013

National Satellite Meteorological Center ,CMA 

Observation capability continuality

Heritage operational positions from FY‐2   86.5E,105E and 112.0E                                       

Revision 201310

Coverage 2015

New positions to apply79E,99.5E,112E ,123.5E 133E

AGRI GIIRS LMIAdvanced Geo.Radiation Imager

Geo. Interferometric Infrared Sounder Lighting Mapping Imager

14 Channels within 0.55~13.8μm 538 LWIR Channels375 S/MIR Channels

Central Frequency: 777.4nm

500mx1;1Kmx22Kmx4; 4Kmx7

16Km 7.8Km

S/N : 90 ～

200NEΔT：

0.2～0.7K

Radiometric Calibration accuracy: 1KSpectral Calibration accuracy:10ppm

S/N > =6

Full Disk < =15min Meso-scale : 35min(1000x1000km)China area: 67min(5000x5000km)

2ms

FY-4A Instruments

Observation capability continuality

FY-4A FY-2Stabilization Three-axis SpinDesigned Life 5~7 Years 4 Years

Observation Efficiency 85％ 5％

Observation Mode Imaging +Sounding + Lightning Mapping Imaging Only

Main Instruments

AGRI :14 channelsSSP Resolution：0.5~4KmGlobal imaging：15minFlexible imaging ：2D

VISSR: 5 channelsSSP Resolution：1.25~5KmGlobal imaging：30minFlexible imaging ：1D

GIIRS:913 channelsSpectral Resolution: 0.8,1.6cm-1SSP Resolution:16Km

N/A

LMISSP Resolution:7.8Km N/A

SEMSHigh energy particlesMagnetic field

SEMHigh energy particles Solar X ray fluxes

Revision 201108

Advancement of FYAdvancement of FY--4A compared with FY4A compared with FY--22Observation capability continuality

Chinese FengYun

Geo. imaging capability

National Satellite Meteorological Center ,CMA 

FY-2 F/G/H VISSR FY-4A AGRI

Channel Band Spatial Resolution Sensitivity Band Spatial

Resolution Sensitivity Main Application

Visible & Visible & NearNear--

InfraredInfrared

0.450.45～～0.490.49 11 S/NS/N≥≥90 (90 (ρρ=100%)=100%) AerosolAerosol

0.55～0.75 1.25 2.3 @ρ=1% 0.550.55～～0.750.75 0.50.5～～11 S/NS/N≥≥200 (200 (ρρ=100%)=100%)

S/NS/N≥≥5(5(ρρ=1%)@0.5K=1%)@0.5K mm

Fog, Fog, CloundClound

0.750.75～～0.900.90 11 VegetationVegetation

Short- wave

Infrared

1.36～1.39 2 S/N≥200 (ρ=100%)S/N≥200 (ρ=100%)

CirrusCirrus1.58～1.64 2 Cloud,SnowCloud,Snow

2.1～2.35 2～4 Cirrus,AerosolCirrus,Aerosol

MidMid--wave wave InfraredInfrared

3.53.5～～4.0(High)4.0(High) 22 NEΔT≤0.7K(300K) Fire

3.5～4.0 5 0.22K@300K 3.53.5～～4.0(Low) *4.0(Low) * 44 NEΔT≤0.2K(300K) Land surfaceWater Water VaporVapor

5.85.8～～6.76.7 44 NEΔT≤0.3K(260K) WV6.3～7.6 5 0.30K@260K 6.96.9～～7.37.3 44 NEΔT≤0.3K(260K) WV

Long-wave Infrared

8.0～9.0* 4 NEΔT≤0.2K(300K) WV,Cloud10.3～11.3 5 0.12K@300K 10.3～11.3* 4 NEΔT≤0.2K(300K) SST11.5～12.5 5 0.16K@300K 11.5～12.5* 4 NEΔT≤0.2K(300K) SST

13.2～13.8* 4 NEΔT≤0.5K(300K) Clound,WV

Observation capability continuality

Normal Mode 56 FD Flooding Season Mode 56 FD+40NHAGRIAGRI Observation Modes

FD NH

NH

NHFD

FD FD NH

2X2X faster imaging faster imaging 160X 160X more datamore data

2005 FY-2C

FD 60min

2006 FY-2C

FD 30min

2011 FY-2CRRS 10 min

2015 FY-2+FY-4

FD: 15min

RRS: 1-5min

2014-2015 FD: 30minNH: 15minRRS: 6min

2007 FY-2C+FY-2D

FD 30min

NH 15min

Chinese FengYun

Geo. imaging capability

Observation capability continuality

FY‐4A GIIRS Normal observation mode

Regional:55 min 4500KMx4500KM Meso-scale:30 min 1000KMx1000KM

Revision 201310

Observation capability continuality‐new capabilities

National Satellite Meteorological Center ,CMA 

National Satellite Meteorological Center ,CMA 

LMI:  Lighting Mapping ImagerSpatial resolutionSpatial resolution about 6 km at SSPabout 6 km at SSP

Sensor sizeSensor size 4004003300 00 22

WaveWave--length at centerlength at center 777.4nm777.4nm

BandBand--widthwidth 1nm1nm±±0.1nm0.1nm

Detection efficiencyDetection efficiency >90%>90%

FalseFalse--alarm ratioalarm ratio <10%<10%

Dynamic rangeDynamic range >100>100

SNRSNR >6>6

Frequency of framesFrequency of frames 2ms2ms（（500 Frames per sec.500 Frames per sec.））

QuantizationQuantization 12 12 bitsbits

Measurement ErrorMeasurement Error 10%10%

Observation capability continuality‐new capabilities

MCS: Mission Control SystemDTS: Data and Telemetry SystemNRS: Navigation and Registration SystemCVS: Calibration and Validation SystemPGS: Product Generation SystemADS: Application Demonstration SystemSWS: Space Weather SystemCNS: Computer and Network SystemDSS: Data Distribution and Service System

System &products readiness

FY‐4 Ground System

FY‐4 Ground System Developing Status

National Satellite Meteorological Center ,CMA 4th Asia‐Oceania Meteorological Satellite Users Conference 

PrePhasePrePhase：：End user requirement  analysis                                  End user requirement  analysis                                  

20062006‐‐20092009Instrument requirement                                          Instrument requirement                                          

20062006‐‐20092009Phase A: Science(Algorithm Development)Phase A: Science(Algorithm Development)Product requirement analysis  & tradeoff study                  Product requirement analysis  & tradeoff study                  

20082008‐‐2011     2011     Algorithm Development                                           Algorithm Development                                           

20092009‐‐20132013Phase B:Phase B:R&D system design                                               R&D system design                                               

20112011‐‐20132013R&D system integration & test                                   R&D system integration & test                                   

20122012‐‐20142014Phase C: Enginnering (System Integration)Phase C: Enginnering (System Integration)Operational system Design                                       Operational system Design                                       

20132013‐‐20152015Operational system integration & test                           Operational system integration & test                           

20142014‐‐2015 2015 

System &products readiness

2010 2011 2012 2013 2014 2015AWG foundation

Algorithm Design Review – ADR

Critical Design Review - CDR

Test Readiness Review - TRR

Code Unit Test Review - CUTR

Algorithm Readiness Review

ProjectProject

R&D， In‐Orbit TestR&D， In‐Orbit Test

Algorithm Theoretical Basis DocumentsATBD (Version 1.0)

Software codeTest data 

ATBD (Version 2.0) Standard prototype softwareSimulation data

Final version of ATBD

Algorithm Work Group (AWG) Schedule

System &products readiness

FYFY--44Products

Revision 201112

3434 key operation products from AGRI，GIIRS & LMI defined and developed

No .No . Products Products No.No. ProductsProducts No.No. ProductsProducts

1 Clear Sky Masks 13 Downward Longwave Radiation: Surface 24 Fire/Hot Spot Characterization

2 Cloud Top Height & Temperature& Pressure 14 stratified water vapor 25 Land Surface Emissivity

3 Cloud Classification 15 Ozone Profile & Total 26 Snow Cover

4 Cloud Properties(Night) 16 Legacy Vertical Moisture Profile(Cloud) 27 High-energy particle distribution

5 Cloud Properties(Day) 17 Legacy Vertical Moisture Profile(Clear) 28 Magnetic field intensity

6 Aerosol Detection 18 Derived Motion Winds 29 Effects of the space environment

7、8Aerosol Optical Depth

(Land/Ocean) 19 Rainfall Rate/QPE 30 Fog

9 Downward Shortwave Radiation: Surface 20 Convective Initiation 31 Land Surface (Skin) Temperature

10 Upward Longwave Radiation: Surface 21 Tropopause Folding Turbulence

Prediction 32 Land Surface Emissivity

11 Reflected Shortwave Radiation: TOA 22 Lightning Detection 33 Image Product

12 Upward Longwave Radiation: TOA 23 Sea Surface Temperature (skin) 34 RGB

System &products readiness

Six Types Proxy dataSix Types Proxy data：：MODIS, SEVIRI, FY‐2,  Simulation Data of AGRI, Simulation Data of 

LMI, Simulation data of Space weather products

Proxy Data

Product Simulation DataInjection longwave Radiation MODIS

Downward Shortwave Radiation: Surface

Simulation Data

Upward Longwave Radiation: Surface

MODIS

RGB synthetic（Atmospheric correction cloud ）

MODIS

Shortwave Radiation reached Surface

MODIS

Atmospheric temperature and humidity & Ozone Profile（Clear sky ）

Simulation Data

Convective Initiation Simulation DataTropopause Folding Detection Simulation DataLand Surface Emissivity Simulation DataLegacy Vertical Moisture Profile(Cloud)

Simulation Data

Aerosol Detection(Land) MODISReflected Shortwave Radiation: TOA

MODIS

Fire/Hot Spot Characterization MODIS

Product Simulation DataCloud products SEVIRI

Fog Detection FY‐2

Derived Motion Winds FY‐2

Space weather products Simulation Proxy Data

Lightning Detection Simulation Proxy Data

Imager stratified water vapor Simulation Data

Sea Surface Temperature (skin) FY‐2

Dust Detection MODIS

Land Surface (Skin) Temperature FY‐2

QPE Simulation Data

Snow Cover FY‐2

System &products readiness

Cloud product simulation of FY-4A(MSG SEVIRI is used as proxy)

Cloud Mask

Cloud Type Cloud Phase

System &products readiness

Cloud Height

Cloud Pressure

Cloud Optical Depth

Cloud Effective Radius

Atmospheric 

correction 

Choose the 1.6 μm , 0.86 μm ,0.64 μm channel of multi‐channel scanning imaging radiometer , 

through the atmospheric correction to rapid generate the RGB image.

Difference：

RGB Image

System &products readiness

FY-4A

MODIS

AOD(550nm) Angstrom 指数 SM Concentration

AOD(550nm) Angstrom Exponent SM Concentration

Aerosol Optical Depth

MODIS MODIS

FY-4A FY-4A

Proxy Data: MODIS;

Band : 0.45～0.49 μm; 0.55～0.75 μm; 1.36～1.39 μm; 2.1～2.35 

μmAlgorithm: Dark Target 2008.1.1_0300(UTC)

LMI product development

National Satellite Meteorological Center ,CMA 4th Asia‐Oceania Meteorological Satellite Users Conference 

Pulses Photons 发光事件Flash scale

Flash 36

Event 2897Group 420

Radiance 4721

Courtesy of Dr. Dongjie Cao –NSMC FY‐4 AWGof 

System &products readiness

FY-4 User preparedness:Data Distribution and Service System

Main functions：1.To provide downlink data for DB users

2.To make FY-4 data and products available

via CMACast，Internet, and dedicated links

3.To establish a stable and reliable data

archiving and management system

4.To build an EWIB system to response to

emergency weather events

User preparedness

29

SWAP --Development, Promotion and Training

SWAP development and test was finished in March, 2013

Current version(SWAP 1.0) works for FY-2, and will be upgraded for FY-4

Domestic promotion and training activities have been organized

The system has been installed for trial application in more than 30 provincial weather services in China

The English version have been developed.

User preparedness

Preparing Users to FY‐4

• Efficient and professional analysis tools 

for forecasters

• supporting multiple data, including 

polar satellite data, conventional data 

and NWP products etc.

SWAP:Satellite�Weather�App.�Platform

Contours Contours anaana..

NWP data overlayNWP data overlay

Ground dataGround data

User preparedness