BackForward Satellite: FY-4A 

Satellite details
Acronym FY-4A
Full name Feng-Yun - 4A
Satellite Description
  • 1st flight unit of the FY-4 programme.
  • Mission: operational meteorology.
  • Significant contribution to space weather.
Mass at launch 5300 kg Dry mass
Power 3200 W
Data access link
Data access information
  • Near-real time availability of full resolution data by HRIT and (planned) by CMACast.
  • Availability of selected information by LRIT.
  • Meteorological warnings (WAIB) sharing the LRIT link.
  • Availability of DCP messages by land lines.
Orbit Geostationary orbit Altitude 35786 km
Longitude 104.7° E


Space agency CMANRSCC
Status Operational
Details on Status
(as available)
  • Re-located from the initial position (99.5°E) to the current operational position (105°E nominal) on 16 April 2018
Launch 10 Dec 2016 EOL ≥2023
Last update: 2022-02-23
Associated satellite programme and related satellites

Note: red tag: no longer operational , green tag: operational , blue tag : future

Satellite Payload

All known Instruments flying on FY-4A

Acronym Full name
DCS Data Collection Service
GIIRS Geostationary Interferometric Infrared Sounder
LMI Lightning Mapping Imager
AGRI Advanced Geostationary Radiation Imager
SEP/HEPS Space Environment Package / High Energy Particles Sensor
SEP-fields Space Environment Package - fields
Show instrument status and calibration
Satellite Field of View

Estimate of the satellite's footprint, assuming a zenith angle of 75 °
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Satellite frequencies for Earth Observation, data transfer and platform communications and control
Frequencies for satellite management
Service Direction Frequency (MHz) Emission designator Bandwidth (kHz) Polarisation D/A Data rate (kbps) or Baseband (kHz) Comments
DCPS E-S 401.1 MHz - 401.4 MHz 3 kHz RHCP D   Regional DCP reports
DCPS E-S 402 MHz - 402.1 MHz 3 kHz RHCP D   International DCP reports
DCPS S-E 1688 MHz 4000 kHz linear D   DCP report relay
Frequencies for scientific data acquisition and communication services at ground stations
Service Direction Frequency (MHz) Bandwidth (kHz) Polarisation D/A Data rate (kbps) or Baseband (kHz) Comments
CDAS S-E 7500 MHz 100000 kHz RHCP&LHCP D   Raw data
HRIT E-S 8185 MHz 20000 kHz RHCP D   High-resolution data
HRIT E-S 8205 MHz 20000 kHz RHCP D   High-resolution data
HRIT S-E 1681 MHz 12000 kHz linear D   High-resolution data
LRIT & WAIB E-S 2057 MHz 1000 kHz RHCP D   Selected data and information
LRIT & WAIB S-E 1697 MHz 2000 kHz linear D   Selected data and information
TARS E-S 2047 MHz 10000 kHz RHCP D   Ranging
TARS S-E 2227 MHz 10000 kHz RHCP D   Ranging
TARS S-E 1693 MHz 8000 kHz linear D   Ranging
T&C E-S 2067.5 MHz 85000 kHz RHCP D   Telemetry and commands
T&C S-E 2245 MHz 90000 kHz RHCP D   Telemetry and commands