National Satellite Meteorological Center of CMA

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FY-3A

Satellite Name:FY-3A

Running:RunningTwoLineScheduleOneLineOrbital

Satellite Overview:

Storm III (FY-3) satellite is China's second-generation polar orbit meteorological satellite, which is the basis of FY-1 meteorological satellite technology on the development and improvement in function and technology a big step forward with qualitative change, specific requirements to solve the three-dimensional atmospheric detection, ability to obtain substantial increase in global data to further enhance the cloud and surface characteristics of remote sensing capabilities, enabling access to global, all-weather, three-dimensional, quantitative, multi-spectral atmosphere, surface and sea surface parameters.

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Storm III (FY-3) satellite is China's second-generation polar orbit meteorological satellite, which is the basis of FY-1 meteorological satellite technology on the development and improvement in function and technology a big step forward with qualitative change, specific requirements to solve the three-dimensional atmospheric detection, ability to obtain substantial increase in global data to further enhance the cloud and surface characteristics of remote sensing capabilities, enabling access to global, all-weather, three-dimensional, quantitative, multi-spectral atmosphere, surface and sea surface parameters. FY-3 meteorological satellite applications for purposes such as four aspects:
● the provision of global numerical weather prediction for the medium-term resolution of the meteorological parameters uniform.
● study of global change, including climate variation, climate prediction for the variety of meteorological and geophysical parameters.
● monitoring of large-scale natural disasters and the surface environment.
● for a variety of professional activities (aviation, maritime, etc.) of any region to provide global weather information, meteorological support services for the military.
 
FY-3 research and production is divided into two batches, 01 batches of two satellites, FY-3A has been on 7 May 2008 successfully launched. 02 star award in 2010 after the launch, and some remote sensing instruments for the addition, replacement and performance improvements, FY-3 satellites will apply 15 years. FY-3 satellite of the main technical indicators are:
Orbit type: near polar sun-synchronous orbit
Nominal orbit altitude: 836 km
Orbital inclination: 98.75 °
Nominal orbital period of 5.5 days back, the design range of 4-10 days
To keep track of eccentricity: ≤ 0.0025
Intersection local time drift: less than 15 minutes to 2 years
Satellite Launch Window: descending node local time 10:00 AM ~ 10:20 AM local time ascending node, or 13:40 PM ~ 14:00 PM
Attitude stabilization mode: three-axis stabilized
Axis pointing accuracy: ≤ 0.3 °
Axis measurement accuracy: ≤ 0.05 °
Three-axis attitude stability: ≤ 4 × 10-3 ° / s
Solar panels automatically be directed to Japan tracking.
FY-3 (01 batches), 11 species of satellite detection equipment, the equipment and the detection of the purpose of key performance indicators in Table 3.1.
Table 3.1 FY-3 (01 batch) remote sensing instruments key performance indicators
Name
Performance parameters
Purpose probe
Visible infrared scanning radiometer
(VIRR)
Spectral range    0.43~12.5μm
Channels      10
Scan range    ±55.4°
Ground resolution 1.1Km
Cloud, vegetation, sediment, cirrus clouds and phase of cloud, snow, ice, surface temperature, sea surface temperature, water vapor and so on.
Atmospheric detection equipment package
Infrared spectrometer (IRAS)
Spectral range  0.69~15.0μm
Channels     26
Scan range    ±49.5°
Ground resolution 17Km
Air temperature and humidity profiles, O3 total content, CO2 concentration, aerosol, cloud parameters, polar ice and precipitation.
Microwave Thermometer(MWTS)
Spectral range    50~57GHz
Channels       4
Scan range    ±48.3°
Ground resolution 50~75Km
Microwave hygrometer(MWHS)
Frequency range   150~183GHz
Channels      5
Scan range    ±53.35°
Ground resolution 15Km
Medium Resolution Spectral Imager
(MERSI)
Frequency range    0.40~12.5μm
Channels      20
Scan range    ±55.4°
Ground resolution 0.25~1Km
Ocean color, aerosols, water vapor, cloud properties, vegetation, surface characteristics, surface temperature, ice and snow.
Microwave Imager
(MWRI)
Frequency range    10~89GHz
Channels      10
Scan range    ±55.4°
Ground resolution 15~85Km
Rain rate, cloud water content, water vapor, soil moisture, sea ice, sea surface temperature, snow cover and so on.
Earth radiation detector
(ERM)
Spectral range   0.2~50μm,0.2~3.8μm
Channels    Narrow field of view 2, wide field of 2
Scan range   ±50° (Narrow field)
Sensitivity      0.4Wm-2·sr-1
Earth radiation
 
Solar radiation monitor
(SIM)
Solar radiation measurements:
Spectral range   0.2~50μm
Sensitivity      0.2Wm-2
Solar radiation
UV Ozone Sounding
(SBUS)
Spectral range0.16~0.4 μm
Channels    12        
Scan range  Vertical down
Ground resolution 200km
O3 Vertical distribution
 
Total Ozone UV detector
(TOU)
Spectral range 0.3~0.36μm
Channels     6
Scan range ±54°
Nadir resolution   50km
O3Total content
Space Environment Monitor
(SEM)
Measure space heavy ion, high-energy protons, the high energy electron, radiation dose; monitoring satellite surface potential and single event upset events.
Satellite space environmental parameters required for failure analysis
 
Data transmission using three channels. The first is the L-band real-time data (HRPT) transmission channel ,1698-1710MHz, code rate of 4.2Mbps (RS encoded) for medium-resolution imager than all the other real-time detection of data transmission, sent worldwide. The second is the X-band real-time data (MPT) transmission channel ,7750-7850MHz, code rate of 18.7Mbps (RS encoded), medium-resolution spectral imager for real-time data transmission. The third is the X-band delay data (DPT) transmission channel, 8025 ~ 8400MHz, code rate of 93Mbps (RS encoded), the playback delay of the satellite transmission of data storage. In the data transmission format standard CCSDS AOS recommended standard, the next generation of U.S. and European weather satellite digital data format consistent. 
Playback of data stored on the satellite is divided into two categories, one for global coverage, both day and night every day when the times, such information has in addition the Moderate Resolution Imaging Spectrometer detector outside all of the original resolution of the data, including scanning 1.1 km radiometer resolution 10-channel raw data. The other data is optional region in the Earth imager resolution local data.