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Current status current HF meteorological broadcast at RTH Beijing

Cost effective satellite-based data broadcast systems for replacement of the present HF meteorological broadcast. Current status current HF meteorological broadcast at RTH Beijing.

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Current status current HF meteorological broadcast at RTH Beijing

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  1. Cost effective satellite-based data broadcast systems for replacement of the present HF meteorological broadcast

  2. Current status current HF meteorological broadcast at RTH Beijing • Sevendifferent frequenciesrent for Beijing Regional Meteorological FSK broadcast, including all frequencies used in daytime and nighttime.

  3. Limited coverage, less than 2000km.

  4. Higher bit error rate, 10-3–10-4

  5. Low broadcasting rate, 4.8kbps

  6. Costs for source • Annual service charge: 300,000yuan. • Costs for destination devices • Antenna: about 20,000yuan

  7. Short wave receiver: 25,000yuan

  8. Terminal device (facsimile receiver): 10,000yuan

  9. Moreover, aserious problem that faces RTH Beijing current isthatthe local carrier won’t support HF broadcast service no longer sinceOctober1.So, RTH Beijing are preparing to start continuously posting all the data, which are being distributed via HF broadcastcurrently,on CMA’s Internet Web server fromthis October.

  10. 2. Cost effective CMA’s domestic communicationssystem

  11. Wide coverage: asatelliteoperating on a earth synchronous orbit can cover 1/3 of the area of earth • Terrestrial infrastructure independent

  12. Highly Reliable and Availability above 99.9% • Lowbit error rate, 10-8–10-9

  13. Highbroadcasting rate,

  14. Costs for source • Annual chargefor a 1M broadcast band : 40,000yuan. • Costs for a remote • Antenna(Ku band): about 1,600yuan

  15. DVB interface card: 2,000yuan

  16. LNB(Ku band): 880yuan

  17. Terminal device (PC): about 8,000yuan

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