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Review of Introduction to the exchange of radar data in RA-II

Review of Introduction to the exchange of radar data in RA-II. Dr. LI Bai CMA Meteorological Observation Centre. Overview. China New Generation Weather Radar CINRAD data transmission 3. Application Data Exchange 5 . Problem s and S uggestion s. Development of CINRAD.

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Review of Introduction to the exchange of radar data in RA-II

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  1. Review of Introduction to the exchange of radar data in RA-II Dr. LI Bai CMA Meteorological Observation Centre

  2. Overview • China New Generation Weather Radar • CINRAD data transmission 3. Application • Data Exchange 5. Problems and Suggestions

  3. Development of CINRAD • Scenes pictures of some CINRAD Towers in China

  4. Development of CINRAD • Deployment of the 216 CINRADs over China Blue: S-band Green: C-band Red: additional 58s Total 216s by 2014, 178s by 2012

  5. Development of CINRAD • The radar coverage over China Mainland at 1500 m and 3000 m height above sea-level

  6. Development of CINRAD • Coverage of regional radar networks at different height in East China and Central China 1500m height above sea-level 500m height above sea-level 1000m height above sea-level 2000m height above sea-level 2500m height above sea-level 3000m height above sea-level

  7. Current status and use of data in China • The operational availability during 2006-2011 • Left figure:CINRAD Operational Availability during 2006-2011, Blue color represents Operational Availability, Red color represents American standard. • Right figure: Mean Failure Duration during 2008-2011

  8. Application of CINRAD in Typhoon • Application of Wenzhou CINRAD in monitoring the typhoon Saomai (at 09:13 BT 10 Aug. 2006)

  9. Application of CINRAD in Typhoon At 11:42:29 BT 12 August 2004 At 12:06:38 BT 12 August 2004 The Typhoon of Rananim in 2004.

  10. Application of CINRAD in Baiu Front Rainstorm • Application of CINRAD in the monitoring of Baiu front rainstorm (On 8-9 July 2007)

  11. Application of CINRAD in heavy Rainstorm • Application of CINRAD in the monitoring of the heavy rainstorm(happened In 21-22 July 2012) in Beijing, The left figure shows the observed rainfall and the right one is 24-h QPE(Quantitative Precipitation Estimation) The QPE is in accordance with the amount of the rainfall.

  12. Application of CINRAD in Monitoring of The Squall Line Storm relative velocity Reflectivity Radial Velocity • At 20:26 BT 3 June, the Shangqiu radar detected a supper cell of severe convective weather with gust front.

  13. Maintenance system for CINRAD • “Two-level management and Three-level maintenance”. National Management: Developing Plan and strategy and construction Province Management: National Maintenance Provincial Maintenance Radar Site Maintenance

  14. CINRAD Data Transmission • Flow chart of radar data transmission 144 radar sites have been put into operation by the end of 2012. It takes less than 5 minutes to transmit the data from Information Center to user. The provincial centers share the base data and the timeliness is less than 14 minutes. The data transmitted from radar sites to National Meteorological Information Center includes 10 kinds of PUP products and the timeliness is less than 15 minutes.

  15. CINRAD Data Transmission • Storage periods of radar data at radar sites, provincial and national centers

  16. Application of CINRAD in Weather Forecast Service • In nowcasting operation CINRAD is applied in RUC in nowcasting operation. For example,VDRAS, is used to carry out quality control and thermal dynamic characteristic inversion for the data of 4 S-Band radars(in Beijing, Tianjin, Shijiazhuang, and Qinhuangdao) and 2 C-Band radars (in Zhangbei and Chengde)

  17. Application of CINRAD in Weather Forecast Service • Application of CINRAD in GRAPES_RUC • In May 2010, the GRAPES_RUC system was put into trial operation. • In 2012 the experimental study on the application of 3-D cloud analysis, which is based on radar reflectivity 3-D mosaic and satellite data, in GRAPES_RUC was finished. • The results show that the 3-D cloud analysis can effectively improve the accuracy of nowcasting.

  18. Data Exchange • Data exchange over China mainland China Integrated Meteorological Information Service System (CIMISS)has been established in China, so the radar data can be transimitted to many departments in time. There are 4 weather radars in Taiwan island, 5 C-band Dual-polarization weather radars will be constructed in the future, so the data exchange will be considered between China mainland and Taiwan island, especially mosaic products.

  19. Data Exchange • Data exchange between Guangdong and Hong Kong • The data is exchanged by the MSTP special line between Guangzhou and Hong Kong on the basis of the network requirement of WMO Information System (WIS) to the GISC responsibility zone. • Now ,the base data of Hong Kong Observatory which is offered by Guangdong Meteorological Bureau includes two radar sites (Guangzhou and Shenzhen), the timeliness of transmission is 6 minutes. • What Hong Kong Observatory offers to Guangdong Meteorological Bureau is also the base data, the timeliness of transmitting data is 6 minutes yet.

  20. Data Exchange • Data exchange between Guangdong and Hong Kong The mosaic of 10 radars (which 9 radars belong to Guangdong province and 1 radar belongs to Hong Kong) is made and sent in real-time to Hong Kong for the purpose of monitoring severe weather.

  21. Data Exchange • Sino-ROK data exchange • In 2012, the radar data is exchanged between China and South Korea, It is exchanged by the Sino-ROK special bilateral line according to the norm of GTS. • The data transmitted from China to South Korea includes 5 kinds of products from 6 radar sites.(Radar Sites:Yantai, Qingdao, Dalian, Yingkou, Tianjin and Shenyang, Products: Base Reflectivity, Composite Reflectivity, Velocity, Vertical Integrated Liquid and One-Hour Precipitation • The data transmitted from South Korea to China including one product(CAPPI) from 10 radar sites. • The frequency is once per hour, the requirement of timeliness is 10 minutes.

  22. Data Exchange • Sino-ROK data exchange The coverage of China and South Korea adjoining areas at 1500 m and 3000 m height above sea-level.

  23. Data Exchange • Data exchange between China and North Korea • the data transmitted from China to North Korea includes several kinds of products from 2 radar sites(i.e.,Shen Yang and ) • The products are FengYun-II satellite data, Monthly Dynamic Model Product, Hydrological Station Information and so on. • The frequency is once per hour, the requirement of transmitting timeliness is 10 minutes

  24. Problem and Suggestion • Transmitting timeliness is an important factor • CINRAD data : IQ Data (Level-I), Base Data (Level-II) and The Product Data (Level-III) • No matter global exchange or regional exchange, it should be done by levels. If the exchange is used in NWP, the frequency should not be very high, but if used in nowcasting, the frequency should be high because the transmitting quantity is very little.

  25. Problem and Suggestion • Exchanged data format is important to radar technology development in future • Development of polarization technique • To transmit and store global data conveniently • Establish the data format in detail

  26. Problem and Suggestion • An unified Quality Control scheme should be put forward • According to the situation in different countries, an unified quality control scheme should be put forward to ensure the accuracy of radar data, It is very important for global data exchange. • Three-level Quality Control, unified at Level-I(IQ data) and Level-II(base data).

  27. Thanks for your attention!!! Welcome to China

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