RTH NEW DELHI INDIA METEOROLOGICAL DEPARTMENT NARENDRA NIGAM

A massive modernization program encompassing observation, connectivity, supercomputing and forecasting facilities under an over-arching digital framework has been undertaken on priority basis in India. Under modernization program RTH New Delhi system will be replaced by a new system conforming to GISC specifications. At present as per WMO No.386 it is performing the following functions : 1.Collecting the observational data originating from IMD’s national network and associated National Meteorological Centre’s ( NMC ) of neighboring countries and transmitting such data in appropriate form on the MTN, either directly or through the appropriate WMC/RTH. 2.Relaying selectively on the circuits of the MTN, as internationally agreed in the appropriate form, the meteorological data and processed meteorological information products received from these circuits and/or from RTH’s not situated on the MTN. 3.Ensuring the selective distribution of meteorological data and meteorological information products to the IMD’s national network and associated National Meteorological Centre’s ( NMC ) of neighboring countries and to the RTH’s not situated on the MTN which they serve. 4.Checking and making corrections in order to maintain standard telecommunication procedure. 5.Establishing data disseminating systems territorial and/or via satellite as required in accordance with original plans; 6.Carrying out the monitoring of the operations of GTS of the WWW. 7. The new RTH system at New Delhi will be WIS GISC compliant and provide three fundamental types of WIS services to meet the different requirements, as follows: Routine collection and dissemination service for time-critical and operation-critical data and products: This service is based on real-time “push” mechanism including multicast and broadcast; it would be implemented essentially through dedicated telecommunication means providing a guaranteed quality of service; Data Discovery, Access and Retrieval service: This service is based on request/reply “pull” mechanism with relevant data management functions; it would be implemented essentially through the Internet; Timely delivery service for data and products: This service is based on delayed mode “push” mechanism; it would be implemented through a combination of dedicated telecommunication means and of public data-communication networks, especially the Internet.

Internet GTS/HQ LAN F W I A R L E L National Cluster International Cluster 8. The whole RTH system will be configured as two separate Message switching systems (National MSS and International MSS System) and Database cum portal server. 9. This system will be configured for high availability cluster. 10. The traffic corresponding a particular LAN is not allowed to cross to other LAN unless it is authorized. So individual LAN will be connected through firewall The database system will decode and store data pool as well as metadata in the metadata pool and provide web delivery on the front-end. 12. Storage will be low latency and high volume.. 13 Mobile, WAN, MPLS VPN, DVB-VSAT, INSAT MDD,INSAT-DCWDS, WorldSpace DAB, DTH TV and Internet network shall be connected to Server through firewall. In this system there will be RADAR, satellite, Earthquake, and multihazard information. There will be Content Checker in hot stand-by redundant mode for Virus, Denial of service and spamming and will have the facility to alert users and Administrator F W I A R L E L

GTS Links with RTH New Delhi RTH NEW DELHI Tokyo IP-VPN Moscow IPVPN(FTP) Beijing IP-VPN (FTP) Melbourne Soc(Int) Oman Soc(Int) Male Soc(Int) Jeddah 64Kbps Soc(IP) Karachi 64Kbps Soc(IP) Dhaka 64Kbps Soc(IP) Colombo Soc(Int) Cairo 64Kbps (SOC) Tehran 75 bauds 64Kbps being upgraded Kathmandu 50 bauds and Internet Yangon Soc(int) Bangkok 64Kbs(TCP/IP - FTP) RTH NEW DELHI

Recent Developments at RTH New Delhi  Table Driven Code Form: RTH New Delhi is transmitting daily Synop (on test basis) and SATOB messages of Indian Region in BUFR Format to Tokyo through GTS  Digital Satellite Broadcast of IMD through Asia Star satellite has been changed to multicasting  File naming server installed is providing data to users through TCP/IP Socket, , SMS and FTP in WMO File naming conventions. It has also feature of OCR (Optical Character Recognition) to extract information from imageries.  GMDSS bulletin is also placed on IMD website in real time.

Proposed RTH Features High Availability (more than 99.9%) Cluster Mode Duplex Web, and FTP Conversion from CREX, BUFR, GRIB to ASCII and vice versa Audio visual Alarm for warning messages Message reception through PSTN/Dial- up and SMS Transmission of warnings through SMS to predefined numbers. File switching OCR base FAX transmission and reception Authentication server for Internet users Bilingual features (English and Hindi) Daily throughput of data GB. GUI base interface and web interface.

RTH, At New DelhiRTH AMSS At 6 locations (4 old +2 new)AMSS VSAT Network 64 kbps Terminal IVRS Data Terminal Data Terminal At 75 Observatories Interne t At 26 MCs Common People International Network Ongoing Modernization Projects of Telecom Division 64 kbps – 2 mbps Link PSTN/Dial-Up Link Mobile/SMS Link VSAT Link Internet Link for & FTP VPN Link Main Flow of Data ( At 26 Locations )

Data Terminal Features:  The system will be PC (P-IV) based.  The system can connect to Data Collecting Centers (64 kbps terminal) using PSTN/Dial-up link for submission and retrieval of data.  It will also supports transmission and reception of messages via GSM based GPRS or SMS.  The system can transmit and receive messages via , FTP and FAX.  The system has browser based GUI for data handling/manipulation, submit and retrieve meteorological messages. Data Terminal At Observatories Data Terminal Locations ( At 75 Observatories/Field Stations )

Proposed AMSS Features High Availability (more than 99.9%) Cluster Mode Duplex Web, and FTP Conversion from CREX, BUFR, GRIB to ASCII and vice versa WMO as well as AFTN switch Audio visual Alarm for warning messages Message reception through PSTN/Dial- up and SMS Transmission of warnings through SMS to predefined numbers. File switching OCR base FAX transmission and reception Authentication server for Internet users Bilingual features (English and Hindi) Daily throughput of data GB. GUI base interface and web interface. ( Existing 4 at Kolkata, Mumbal, Delhi and Chennai and 2 new at Guwahati and Nagpur )

High Speed Terminal Features:  The system is PC (P-IV) based.  Standard TCP/IP based socket communication for transmission and reception of messages.  Retrieval and submission of messages through PSTN/Dial-up network.  Submission of messages through SMS.  Transmission and reception of messages through in English and Hindi.  Web Interface.  GUI based module for submission and retrieval of data. 64 kbps terminal Locations ( At 27 Locations ) 64 kbps Terminal

IVRS Features:  The system receive WMO formatted messages and decode these messages to weather parameters for answering weather queries by public.  The system interact with caller in English, Hindi and at least one Regional language of that place where it shall be installed.  The system work with all type of exchange used in DOT/MTNL/BSNL etc. including Mobiles.  The system operate round the clock with 99% uptime.  The system have provision to transfer the call to the duty officer in case the caller query is not available in the database.  No single point of failure.  GUI based administration modules.  Voice messages is recorded by professionals. IVRS Locations ( At 26 Locations ) IVRS

Need for Modernization DEPT. OF TELECOM IS WITHDRAWING TP/TELEX LINKS AND HAS ALREADY WITHDRAWN FROM MANY PLACES. DATA THROUGH TELEGRAMS REACHING VERY LATE. HFRT (HIGH FREQUENCY RADIO TELEPHONY) IS OBSOLETE TECHNOLOGY AND WORLD WIDE BEING REPLACED WITH LATEST TECHNOLOGIES AVAILABLE LIKE SMS THROUGH MOBILE AND SERVICES. VPN IS LATEST TECHNOLOGY WITH ADVANTAGES OF CONNECTIVITY BETWEEN ANY TO ANY IN COMPARISON TO DEDICATED LINKS WHICH IS CONNECTIVITY BETWEEN ONLY TWO ASSIGNED LOCATIONS. VPN LINKS ARE SECURED AND COST EFFECTIVE LINKS. SMS AND UTILIZES SIMULTANEOUS TRANSMISSION TO MULTI NODES THUS DATA AVAILABILITY AT AMSS AND RTH ARE VERY FAST. IVRS SYSTEM IS AVAILABLE ON AT 26 LOCATION (IN FOUR METROS,REGIONAL MET CENTRES AND MET CENTRES. AS A PUBLIC WEATHER SERVICE IVRS SYSTEMS. AS PER WMO REQUIREMENTS RTH IS REQUIRED TO EXCHANGE BINARY DATA IN BINARY UNIVERSAL FORM (BUFR) FORMAT, IMAGERIES AND WEB PAGES WHICH ARE AT PRESENT NOT SUPPORTED BY OUR EXISTING SYSTEM. REQUIREMENT OF AMSS SYSTEM AT NAGPUR AND AT GUWAHATI.

1.SIMULTANEOUS EXCHANGE OF DATA WITH MULTIPLE NODES 2. REAL TIME DATA EXCHANGE. CATEGORY-I 85 OBSERVATORIES WITH MULTIPLE OBSERVATIONAL FACILITIES. CATEGORY-II 385 OBSERVATORIES WITH LIMITED OBSERVATIONAL FACILITIES. CATEGORY-III 26 REMOTE OBSERVATORIES IN MOUNTAIN, DESERT AND OTHER INACCESSIBLE AREAS.

Technology for modernization VPN (VIRTUAL PRIVATE NETWORK) LINKS. HIGH SPEED LINKS. SMS THROUGH MOBILE SERVICE. SERVICES. DIALUP CONNECTIVITY FOR DATA RETRIEVAL AND SUBMISSION VSAT LINKS AT COASTAL/DESERT AND MOUNTAIN AREAS. SATELLITE BASED DIGITAL DATA BROADCAST AND ITS RECEPTION. INTERACTIVE VOICE RESPONSE SYSTEM (IVRS) – A PUBLIC WEATHER SERVICE.

Annual Global Monitoring 2007 SYNOP

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