1 / 42

Operational procedures for observational data collection at RTH Bangkok

Operational procedures for observational data collection at RTH Bangkok. Kumpol Luengpetngam Telecommunication Division, RTH: Bangkok E-mail: kumpol@metnet.tmd.go.th. RTH Bangkok.

penn
Download Presentation

Operational procedures for observational data collection at RTH Bangkok

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Operational procedures for observational data collection at RTH Bangkok Kumpol Luengpetngam Telecommunication Division, RTH: Bangkok E-mail: kumpol@metnet.tmd.go.th

  2. RTH Bangkok The telecommunication division of the Meteorological Department of Thailand has assumed as the responsibility of being the Regional Telecommunication Hub (RTH) for south east asia since 1967, upon the request from the World Meteorological Organization (WMO).

  3. MSS History • Teletype Machine • Minicomputer (DG S/130) • Minicomputer (DG MV/7800) • Alpha DEC 2100 • Alpha DEC 40000

  4. DEC Alpha 2100 Server Model A500MP-R AXP 190 MHz Alpha CPU 128 MB RAM DISK 8 GB Dual Ethernet Controllers (in0, tu0) RRD42 600MB CD-ROM Drive Qvision video adapter TLZ06-LG 4.0 GB 4mm DAT tape drive 2.88 MB 3.5” FD TSZ07-AA 1600/6250 bpi reel tape drive

  5. DEC Alpha 4000 Server 300 MHz Alpha CPU 128 MB RAM DISK 8 GB Dual Ethernet Controllers (in0, tu0) RRD42 600MB CD-ROM Drive Qvision video adapter TLZ06-LG 4.0 GB 4mm DAT tape drive 2.88 MB 3.5” FD TSZ07-AA 1600/6250 bpi reel tape drive

  6. Software Feature • System software - Digital UNIX version 4.0b • Application Software - Unified Message Switch (UMS)

  7. COMMUNICATION FEATURE • Asynchronous ITA-2, IA-5 ASCII • Synchronous X.25 (1 PVC & 2 PVC) • TCP/IP Frame Relay, WMO standard FTP

  8. Asynchronous ITA-2, IA-5 ASCII • Supports message exchange on asynchronous circuits and communications devices. • Supports character processing for low speed and telegraphic operations. It operates at speed of 50 bauds to 9,600 bps. • Existing circuit : Bangkok-Jeddah, Bangkok-Hanoi, Bangkok-Yangon and Bangkok-New Delhi.

  9. Synchronous X.25 (1 PVC & 2 PVC) • Supports message exchange procedures under X.25 and Fully supported at speed up to 9600 bps. • Supports the message exchange format in GRIB code and BUFR as defined by WMO. • Existing circuit : Bangkok-Singapore and Bangkok-Beijing.

  10. Internet TCP/IP Frame Relay and standard WMO FTP • Cost-saving and efficiency. • Supports numerous application utilities available off the shelf, which offer solutions to information communication needs of WMO members.

  11. Internet TCP/IP Frame Relay and standard WMO FTP (next) • Provides connectivity between members in a more flexible and versatile manner than base x.25 based equivalent. • New WMO communication technique. • Additional line backup via internet. • Existing circuit: Bangkok-Tokyo, Bangkok-Kuala Lumpur and Bangkok-Vientiane.

  12. Recent development at RTH Bangkok • Hardware updates • Software updates • Circuit updates

  13. Hardware updates • Internet server for TCP/IP. • Cisco 2600 routers. • Sentinet firewalls.

  14. Software updates • WMO socket TCP/IP frame relay module. • WMO FTP standard module.

  15. Circuit updates • 16 Kbps frame relay for Bangkok-Tokyo circuit. • 64 Kbps ftp for Bangkok-Vientiane circuit. • 16 Kbps frame relay for Bangkok-Kuala Lumpur circuit.

  16. Daily Data traffic at RTH Bangkok bytes bytes

  17. Daily average availability of Rx/Tx bulletins at RTH Bangkok Bulletins

  18. Error analysis for data received within 24 hrs. • Invalid origin 19.2% • Invalid header 0.2% • Invalid date 0.1% • Missing start/end of message 5.9% • Line too long 0.3% • Unknown WMO header 13.7% • Duplicate WMO message 60.2%

  19. Problems and recommendations • Silent centre • Garbled message • Repeated sending • Quality message format • Connection failed • Automatic request/reply • Financial support for developing country.

  20. sawaddee

More Related