TECO-WIS, Nov. 2006, Seoul

NC challenges in NC challenges in WISWIS

NC challenges in NC challenges in WISWIS

TECO-WIS, Nov. 2006, Seoul

Who we are?Who we are?

IBL Software Engineering is a specialist in Meteorological IT solutions, and works exclusively in this field.

We are building Meteorological communication systems for 30 years, and during this time, we had to face several challenges in the field of Meteorological Telecommunication, similarly to the current task to provide technological answer for the WIS/VGISG/Metadata solutions.

To complete the picture: We are also developing other meteorological software/systems, including:

• Visualization system

• Pilot-briefing system

• Other specialized met.tools

TECO-WIS, Nov. 2006, Seoul

Moving Weather SystemMoving Weather System

Moving Weather software is an Automated Message Switching System (MSS) originally designed as GTS switch, but features modern object-oriented architecture allowing to act as general message switch. It is designed to operate according to the store-and-forward principle, with an added value of compiling new information out of the received data.

It is fully conformant with the following standards and recommendations: • WMO Manuals No. 386, 306, and 485, and ICAO Annex 3 • Compatible with satellite distribution methods such as EUMETCast, SADIS, RETIM2000, ISCS

TECO-WIS, Nov. 2006, Seoul

WIS for Everyone WIS for Everyone (incl. NC)(incl. NC)

What does WIS/VGISC mean particularly to you, if you are not a GISC centre?

• National Centers (NC) will have a new role in WIS – to act as an interface between public end users/customers and WIS/GISC. • In addition, there is a real need for NCs to benefit from WIS not only for case studies (interactive access)

• RPC interface for Discovery service in WMO Core Metadata

• Build Metadata in real-time during the automatic indexing of data for the operational database, as well as submitting it to DCPC/GISC parent (Metadata Publishing)

• Provide requested data to other VGISC clients

Browser access is good for traversing/harvesting – Google-like access, however operational environment needs machine-to-machine interface on this level:

TECO-WIS, Nov. 2006, Seoul

Data DiscoveryData Discovery

To serve/offer Data Discovery - based exchange:

• Need for Machine-to-Machine interfacing – to provide metadata discovery closer to meteorological user for operational use

• Harvesting by WIS telecommunication system/switch (in NC), where results can be added to data feeds (integrated) just by one click

• Also capability to provide unified interface which is facing user directly – since Metadata will be well-defined, there is an abstraction level between the Metadata and portal, therefore the actual portal provider is irrelevant.

TECO-WIS, Nov. 2006, Seoul

Metadata ModelingMetadata Modeling

For data which is flowing through telecommunication node Metadata will be built by Moving Weather in NC automatically in order to be passed to VGISC superstructure:

1. From Metadata already included in modern Table-Driven formats (BUFR, GRIB(2)) intoISO 19115 WMO Core Metadata

Table-DrivenCode

Metadata

Metadata ExtractionMetadataDatabase

Non-compliantCode

Basic extractionMetadataDatabase

Supl. Metadata Catalog

Supl. Metadata Catalog

Metadata

Metad

ata

2. From original data using supplementary Metadata catalogs

TECO-WIS, Nov. 2006, Seoul

Data Transfer TechnologiesData Transfer Technologies

GTS is expected to remain as main component for real-time operation in WIS. However, there are new expectations and technologies we in-build for moving from traditional least line circuits to TCP/IP / MPLS / VPN networking:

1. Automatic File Distribution (AFD) Transfer of non-GTS data, providing back-end for real-time Push and Pull

2. VPN Interconnection of sites Provides multi-point secured network

at TCP/IP level, no longer fixed topology3. Pull/Push GISC Interfacing Use of Web-services to expose server/client functionality

TECO-WIS, Nov. 2006, Seoul

SecuritySecurity

Scenario: 1. External user searches for keywords in

VGSIC using WMO Core Metadata2. Metadata points to source of data – to

certain NC3. NC is supposed to provide data to user.

VGISC GISC

Discovery Request

Reply w/ Metadata

NC

Met

ada

ta p

oin

ts t

o...

Requ

est

for

Data

Problems:1. Global network security problem (for non-members of VPN area) –

can be solved by firewalls and drop-sites in DMZ

2. Data license issue – WMO Resolution 40 – need for global authorization authority to recognize a non-local user not only inside of VGISC

3. Avoid Google-bomb like attacks – by preventing unauthorized submitting of Metadata – to be solved either by VPN or by NC/DCPC to VGISC auth.

TECO-WIS, Nov. 2006, Seoul

Data Assembly/ConversionData Assembly/Conversion

Recall: NC in WIS should be able to provide data they are contributing.

Type of users:

• Purely Meteorological community – data formats are recognized, but problem of compatibility may arise

• Wide public / commercial customers – besides security issue (Res 40) they usually do not understand all codes, especially TDCFTherefore: Data transformations engaged/offer via Web-services:

• into XML (XSLT transformations)

• WMS and WCS service

TECO-WIS, Nov. 2006, Seoul

Role of Moving WeatherRole of Moving Weather

• Making use of Data Discovery directly from telecommunication system (TBD as soon as RPC interfaces are finalized & published by GISC sites)

• Seamless integration of discovered data into regular data-transfers (or ad-hoc pull) – as opposite to static routing provided by GTS

• New telecommunication methods for IMTN: MPLS, VPN

• Automatic File Distribution – providing real-time Push and Pull technologies, incl. secured transfers

• Server/Client interface through web-services (Data access, WMS)

• Metadata Modeling – ready to contribute Metadata to global system from real-time data

• Data decoding (for Table-Driven Code Forms) and interfacing NC’s databases on both Input and Output from/to TDCF

TECO-WIS, Nov. 2006, Seoul

Thank youThank youfor your attention!for your attention!

I will be glad to hear your comments I will be glad to hear your comments and answer your further questions.and answer your further questions.

Thank youThank youfor your attention!for your attention!

I will be glad to hear your comments I will be glad to hear your comments and answer your further questions.and answer your further questions.