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Data Access
Direct Broadcast Service

Transmission parameters for data Direct Broadcast Service may vary from satellite to satellite in detail. Please find out the difference from the reference paper Frequencies Used by Current and Future Fengyun Satellite Systems in the Support area.

General

Both Fengyun geostationary and Fengyun polar-orbiting satellite systems provide Direct Readout Service. Users equipped with proper data acquisition facilities can directly receive data from the satellite broadcast. For updated information of transmission frequencies please refer to Frequent Management.

FY Geostationary Direct Broadcast Service

The satellites at 105oE and 86.5E transmit hourly full-disc imagery of VISSR instrument in SVISSR format. Updated documentation of FY2 satellite SVISSR format can be found in the website Library. To receive the SVISSR data transmission, user needs to set up proper acquisition equipment. For technical consultation, please contact the ShineTek company, a NSMC technical spin off which is dedicated to R&D in hardware / software for the meteorological satellite application.

SVISSR - Imagery Transmission Frequency Bandwidth Polarization Antenna Data rate
1687.5 MHz 2.0 MHz linear Diameter ~ 3 m G/T ~ 6.0dB/K 660 kbps

FY Polar-orbiting Direct Broadcast Service

The operational polar-orbiting satellites FY-3s provide direct readout service for users with two spectral bands in HRPT and AHRPT formats separately. To assist DB users with processing the FY-3 transmission data (HRPT or AHRPT), the NSMC has released two software packages, FY3L0pp V1.0 and FY3L1pp V1.0, for Linux users. The two software packages are capable of processing the raw data of 4 instruments aboard FY-3s: MERSI, VIRR, MWTS and MWHS. To obtain the packages please visit NSMC information service web.

HRPT - High Resolution Picture Transmission Frequency Bandwidth Polarization Antenna Data rate
1700.4MHz 5MHz right-hand circular diameter~ 2m G/T ~ 21.4 dB/K 1.33 Kbps

AHRPT - also referred to as Medium-resolution Picture Transmission (MPT) Frequency Bandwidth Polarization Antenna Data rate
7775 MHz 45 MHz diameter ~ 3 m G/T ~ 21.4 dB/K diameter~ 2m G/T ~ 21.4 dB/K diameter ~ 3 m G/T ~ 21.4 dB/K

Technical and equipment consultation

The ShineTek

Telephone:+86-10-6840 6347
Fax: +86-10-6217 4546
Email: shinetek@nsmc.org.cn