RTH NEW DELHIINDIA METEOROLOGICAL DEPARTMENT

NARENDRA NIGAM

amssdelhi@imdmail.gov.in

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 LANF W I AR LE 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.

.. 11. 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 AR LE L

GTS Links with RTH New Delhi

RTH NEW DELHITokyo 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 GTSDigital 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, E-mail, 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 RTHFeatures

High Availability (more than 99.9%)Cluster ModeDuplex Web, E-mail and FTPConversion from CREX, BUFR, GRIB to ASCII and vice versaAudio visual Alarm for warning messagesMessage reception through PSTN/Dial-up and SMSTransmission of warnings through SMS to predefined numbers.File switchingOCR base FAX transmission and receptionAuthentication server for Internet usersBilingual features (English and Hindi)Daily throughput of data -- 100 GB.GUI base interface and web interface.

RTH, At New Delhi

AMSS At 6 locations

(4 old +2 new)

VSAT Network

64 kbps Terminal

IVRS

Data Terminal At 75 Observatories

Internet

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 E-mail & FTP

VPN Link

Main Flow of Data

( At 26 Locations )( 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 E-mail, 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

FeaturesHigh Availability (more than 99.9%)Cluster ModeDuplex Web, E-mail and FTPConversion from CREX, BUFR, GRIB to ASCII and vice versaWMO as well as AFTN switchAudio visual Alarm for warning messagesMessage reception through PSTN/Dial-up and SMSTransmission of warnings through SMS to predefined numbers.File switchingOCR base FAX transmission and receptionAuthentication server for Internet usersBilingual features (English and Hindi) Daily throughput of data -- 50 GB.GUI base interface and web interface.

( Existing 4 at Kolkata, Mumbal, Delhi and Chennai and 2 new at Guwahati and Nagpur )

VSAT

VSAT:All the VSATs are inter connected with each other as well as RTH, New Delhi.

The VSAT system is connected to PC through Ethernet Port.

All the VSAT systems is access to Internet.

Standard Internet software packages such as E-mail, FTP and Web is used to connect to remote nodes of VSAT, AMSS, HQ etc.

Back

VSAT Locations

( At 26 Locations )

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 E-mail 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 EMAIL 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 EMAIL 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 85OBSERVATORIES WITH MULTIPLE OBSERVATIONAL FACILITIES.

CATEGORY-II 385 OBSERVATORIES WITH LIMITED OBSERVATIONAL FACILITIES.

CATEGORY-III 26REMOTE OBSERVATORIES IN MOUNTAIN, DESERT AND

OTHER INACCESSIBLE AREAS.

Technology for modernization

VPN (VIRTUAL PRIVATE NETWORK) LINKS.

HIGH SPEED LINKS.

SMS THROUGH MOBILE SERVICE.

EMAIL 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

ANNUAL GLOBAL MONITORING 2007 TEMP

ANNUAL GLOBAL MONITORING 2007 CLIMATE

ANNUAL GLOBAL MONITORIN 2007 CLIMATE TEMP