CMA’s Satellite-based Data Services

NMIC, CMA

Outline

• CMA’s domestic communication networks

• CMA’s data dissemination services– CMA PCVSAT broadcast– CMA DVB-S broadcast– FENYUNCast

NMIC

Broadband network

Two-way VSAT system

VSAT-based broadcasting

system

Provincial centers

31

City level centers

300

County level centers

2300

CMA’s Domestic Communication Networks

VSAT-based two-ways system AsiaSat 2, Ku band

Data Communicaton: 1 outbound channel, 512kbps 12 inbound channels, including 8*128kbps operational channel, and 4*64Kbps backup channel

Backup to the broadband network: collecting observations and products from local weather centers to NMIC

1 hub station, 330 remote station

VSAT-based broadcasting system

• Disseminating data and products from national center (NMIC) to local weather centers, as well as some neighboring countries

• CMA’s data dissemination services– CMA PCVSAT broadcast– CMA DVB-S broadcast– FENGYUNCast

CMA PCVSAT broadcast

Operational since 2000 Bandwidth 2Mbps 256 logical channels， typic

al channel rate 64Kbps Priority based broadcast: Em

ergency messages sent out i

mmediately 2600 receiving stations, includi

ng 5 in neighboring countries: P

yongyang, Ulan Bator, Hanoi, Y

angon, Dhaka Daily broadcasting data volu

me: 2.8Gbytes.

AsiaSat 2 (100.5E) C&Ku-band converage

CMA DVB-S broadcast• Upgrading System for PCVSAT

• Same satellite and transponder

• Operational since April 2006

• 350 receiving stations

• Cheaper receiving system: DVB-S based

• Priority based broadcast: Emergency messages sent out immediately

• Total data rate: 8Mbps, daily broadcast data volume 25GB, + 2 MPEG-4 video streams

• New data service since 2007: Near real-time dissemination of FY-2C/D satellite images every 15 minutes to local weather centers

Data distributed over PCVSAT and DVB-S

• ObservationsSYNOP, TEMP, PILOT, SHIP, BATHY, BUOY, CLIMAT, CLIMAT TEMP, AIREP, AMDAR, TRACKOB, TESAC, WAVEOB, SATEM, SARAD, SATOB ……

• Warnings• Model products• Radar data and products• Satellite data and products• etc……

• PCVSAT: 2.8GB/day• DVB-S: 25GB/day

FENGYUNCast• CMA’s contribution to GEONETCast

Provides an effective way to disseminate different kinds of satellites data in a unified platform.

Advanced features: Near real-time data collection, Automatic data broadcasting, Centralized user information management, Cheap and industrial standardized user terminal, etc……

User Terminal: Receiving Station

CMA DVB-S User Terminal Hardware Configuration

Asiasat-4 C-band EIRP Coverage

Wider Coverage for Asia/pacific region Countries!

Data distributed over FENGYUNCast

• Satellite data and products– FY-2C, FY-2D– FY-1D– NOAA/AVHRR– MODIS(TERRA、 AUQA）

130 FENGYUNCast receiving stations in China

FENGYUNCast receiving stations in 18 countries

• In 2006, 7 receiving stations– Bangladesh, Indonesia, Iran, Mongolia, Pakist

an, Thailand, Peru

• In 2007, 11 receiving stations– DPRK, Kyrghyz, Lao P.D.R, Malaysia, Myanm

ar, Nepal, Philippines, Sri Lanka, Tajikistan, Uzbekistan, and Viet Nam

Data exchange with EUMETCAST

Consolidation of broadcast systems

• An integrated broadcast catalogue containing

both conventional and satellite data and

products, supporting WIS data dissemination

• Transmission in both Ku and C band

– Ku: smaller antenna dish

– C: bigger footprint (better coverage outside China),

and not affected by heavy rain

• Enhanced user management and support