1. Telecommunication System Bernd Richter, RTH Offenbach
MSS EDZW := MTSO
Meteorological
Telecommunication System
Offenbach
Bernd Richter, RTH Offenbach
MTSO

2. RTH Offenbach Main Tasks
RTH in the WMO MTN
Continuous reception and dissemination of meteo- rological data (ASCII and Binary) in bulletins or files via RMDCN (GTS), AFTN (ICAO) Internet, leased lines, HF Radio Broadcast, Satellite DWDSAT etc.
Supply of the German National Computer Centre, National Regional Offices and Research Vessels with meteorological data and products
Main Purpose

3. March 1982 DEC PDP 11/44-System (GEI-MSS)
March 1990 Migration to a VAX-Cluster (WMO-MSS)
December 1992 Deactivation of the PDP 11/44-System
April 1996 Transition to MSS II and AFD on Stratus Continuum 620
FTX OS = System V Rel. 4 UNIX derivative;
implementation of TCP/IP protocols (ftp/sockets)
November MSS on a high availability-Cluster
Primepower 400 with SUN-Solaris 8 (Fujitsu Siemens Computer)
August MSS High-Availability-Cluster Primargy 300S Fujitsu FSC SLES10 S
October MSS-Software-Migration to IBL-soft Moving Weather
History

4. Switching Software (MSS/AFD)
Message Switching Software, Main features
Full compliance to WMO- / ICAO - Standards and Recommendations
 High Performance, Graphical User Interface
 Online Configuration, context sensitive help
Interfaces to other standard communication devices
Easy extension due to modular design
Send / retrieve any type of file, bulletin and report
File distribution with priority
Moving Weather
Switching Software (MSS/AFD)
Moving Weather
Moving Weather
Moving Weather

5. Main Telecommunication Network
Main Telecommunication Network (MTN)
Main Telecommunication Network

6. Regional Meteorological Telecommunication Network

7. National Meteorological Telecommunication Network

8. MSS Connections Approximately 120 virtual channels configured
Apart from international connections within the WMO networks
several connections to International Organisations, DWD Regional Offices in Germany, Universities, authorities and other customers.
MTN connections - Beijing (RA II), Jeddah (RA II), Nairobi (RA I),
Prague and Toulouse
RMTN connections - Exeter, Norrköping, Rome, Vienna, Warszawa
RTH-Responsibility Israel (Bet Dagan), Switzerland (Zurich)
Bilateral connections - Amman, Ankara, Athens, De Bilt, Kobenhavn, Madrid, Abu Dhabi, Doha, Teheran, Ljubljana
Int. Organisations - ICAO, ECMWF, ESOC, EUMETSAT
Dissemination services - HF Radio Broadcast (F1B and F1C), DWDSAT
MSS Connectivity

9. MSS connections continued
Protocol types used with the connected lines:
Asynchronous incl. Modem-connections, HF Broadcast
(3 international, 2 national, 1 DWD internal)
Antarctica, R/V Polarstern, Meteor, Universities,
D-CMET DROP, IAEA
FTP (35 international, 53 national)
TCP/IP-Sockets incl. special ACK procedure (level4)
(20 international, 4 national)
CIDIN, X withdrawn from use in 2008
Protocols

10. Bandwidth / kbps and percentage of lines from / to RTH Offenbach
OUT/IN kbps % Bandwidth CCCC/ORG ISO City
ECMW GBR Reading
128/ LSSW CHE Zurich
LFPW FRA Toulouse
EUMS DEU Darmstadt
LOWM AUT Vienna
ESWI SWE Norrköping
48/ EGRR GBR Exeter
BABJ CHN Beijing
OKPR CZE Praha
LIIB ITA Rome
LTAA TUR Ankara
LGAT GRE Athens
32/ LYBM FYU Beograd
16/ OEJD SAU Jeddah
EKCH DNK Kobenhavn
LEMM ESP Madrid
OMAE UAE Abu Dhabi
16/ OJAM JOR Amman
16/ SOWR POL Warszawa
1248 kbps TOTAL
Bandwidth / kbps
and percentage
of lines from / to
RTH Offenbach

11. MSS Throughput: current / expected
Data Traffic of EDZW MSS per day
current
number of messages
Input: (6 GB)
Output: 4,3 Million (16 GB) IN: GB
number of files
Input: OUT: 16 GB
Output:
expected within 5 years
input: 1 Million
output: 7 Million IN: GB
input: 1 Million OUT: 200 GB
output: 5 Million
MSS Throughput: current / expected

12. MSS Database 48.000 routing entries with control information
Storage time - report extraction - protection - DTG-checks -
double check by checksum - transmission information etc.
(230 ignore, 400 compiled, 450 sub, input messages)
1.100 scheduler entries
report database entries in 65 different definition records
entries in Station Catalogue
MSS Database

13. MSS: Technical / financial Characteristics
System Availability %
Max. outage time / monthly sum ‘ / 46‘
Maintenance Response Time hrs
Time delay bulletins / files < 1 sec
Time delay with bulletin compilation < 3 min
Storage capacity reports / bulletins limited by disc-space only
Max. length of bulletin, ASCII kB, WMO-part. 250 kB
Max. length of bulletin, binary kB, WMO-part. 500 kB
Max.Traffic per 5 minutes IN/OUT MB / 82 MB
Avrg.Traffic messages p.s. IN/OUT / 22
System price kEuro
Maintenance , Modification kEuro / year
RTH / other connections kEuro / year
Typica