APSDEU-7
20-22 Sept 2006, Honolulu Hawaii1
ASIA-PACIFIC RARS ADM DISCUSSIONS
coordinated by David Griersmith at7th Meeting of APSDEU, Honolulu Hawaii
20-22 September 2006
APSDEU-7, 20-22 Sept 2006, Honolulu Hawaii 2
Asia-Pacific RARS Issues (1)
Add more stations to fill gaps
Project plan (Coordinator)
AAPP V6 coinciding with Metop – BUFR conversion built in
Inter-regional data exchanges - when and where
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New station status Australia - Casey & Davis, Antarctica - expected to provide AAPP files by April 2007
Canada - n/a - Will be contacted around end of 2006 – have expressed interest in accessing Asia-Pacific region ATOVS data
Singapore - Singapore - Trial exchange planned for September/October 2006 between Singapore and Melbourne, thereafter expect to go operational
Philippines - Quezon City - Station requires an upgrade plus AAPP New Zealand - MetService station yet to be upgraded; NIWA station operational
Possibility of sourcing data from NIWA station Fiji - Nandi – upgrade of station required and possible by early 2007 - FMS is committed
to contributing to RARS USA – Honolulu - under discussion Antarctica - Dumont D’Urville - TBD McMurdo - Station operators yet to be contacted pending coverage requirement Tahiti (France) - Tahiti - Station operator yet to be contacted pending coverage
requirement Russia -Vladivostok - Test exchange of data with Melbourne expected in Sept/Oct 2006
Hong Kong (China) - Hong Kong - Trial exchange to be requested for October 2006
APSDEU-7, 20-22 Sept 2006, Honolulu Hawaii 4
Asia-Pacific RARS Issues (2)
Coordinator to promulgate WMO RARS operator/contributor standards
Coordinator to contact WMO/EUMETSAT with list of proposed three letter unique station identifiers
Coordinator to establish data base of all HRPT stations in A-P RARS baseline network in coordination with ITSC/WMO – need assistance of contributing countries – status reports
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Asia-Pacific RARS Issues (3)
File naming e.g. V5.3 renames files to
hirsl1d_noaaNN_yyyymmdd_hhmm_nnnnn.l1dhhmm taken from HRPT file and is not time when s/w is run such as
BUFR creation time
Inter-regional centre requirements
ADM trial led by China – Australia to write to China to participate in prototype/trial
APSDEU-7, 20-22 Sept 2006, Honolulu Hawaii 6
Z_RARS_C_cccc_yyyyMMddhhmmss_Rrrr_(AAPP filename)_bufr.bin
① ② ③
Japan China Australia S. Korea
① Start Time of Reception
BUFR Creating Time
BUFR Creating Time
?
②Name of the receiving station
Small letter
Name of the central station
Small letter
Name of the receiving station
Capital letter
Name of the receiving station
Small letter
③AAPP_RUN naming regulation
EARS naming regulation
AAPP Temporarily name
AAPP_RUN naming regulation
Japan :Z_RARS_C_RJTD_20060801054652_Rkiy_hirsl1c_noaa18_20060801_0546_06173_l1c_bufr.bin
Australia : Z_RARS_C_AMMC_20060801080855_RMEL_hrsn_l1c_bufr.bin
China:Z_RARS_C_BAWX_20060801075501_Rpek_hirs_20060801_0728_noaa18_06175_PEK_l1c_bufr.bin
S. Korea : Z_RARS_C_RKSL_??????????????_Rseo_hirsl1c_noaa17_20060801_0045_21316_l1c_bufr.bin
APSDEU-7, 20-22 Sept 2006, Honolulu Hawaii 7
Asia-Pacific RARS Issues (4)
Which are the intraregional dissemination centres (nodes) Tokyo, Melbourne, Beijing, possibly Seoul and Singapore?
NWP impact studies to be advised to Coordinator and WMO
Implementation of EUMETSAT quality software
Coordinator to maintain and circulate table of focal points
APSDEU-7, 20-22 Sept 2006, Honolulu Hawaii 8
The people: Focal Points A-P RARS
Singapore - Yong Miow Koon on [email protected] Fiji - Leonard Bale on [email protected] China - Li Xiang on email [email protected]; also Licheng Zhao Canada - Josee Morneau Korea - Mi-Lim Ou on [email protected]; Dr Seon-Kyun Baek &
Mr Dong-il Lee (telecomm); Russia, Vladivostok - Anatoly Alexanin on [email protected] Australia - David Griersmith on [email protected] NZ - Murray Douglas MetService & Michael Uddstrom NIWA Japan - Takahiro Saito on RT comms [email protected];
also Hitomi Miyamoto, Hiroyuki Ichijo Yoshiaki Takeuchi & Akihiko Nakazono
USA – NOAA NWS Bill Webb, James Heil - who else? Eumetsat/UKMO inter-regional contacts - Anders Soerensen &
Dave Lee at Eumetsat ([email protected]); Roger Saunders at UKMO ([email protected]), Roger Carter and Nigel Atkinson [email protected]
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Current system configuration
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Pacific gaps
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Addendum:EUMETCast briefing information Sept 2006
This information is from a EUMETSAT presentation at RARS/IGDDS 3rd meeting Aug-Sep 2006, WMO HQ, Geneva.
APSDEU-7, 20-22 Sept 2006, Honolulu Hawaii 13
Concept & Overview Generic, multi-mission dissemination system based on the
standard DVB multicast technology Use of commercial telecommunication satellites Allowing use of off-the shelf, commercial, inexpensive equipment DVB/MPEG-2 based transport for carrying IP datagrams Use of a set of broadcast satellite forward channels (no return
channel) Components:
Data providers Service management provider (EUMETSAT) Uplink service provider Turn around service provider(s) Satellites (Reference) Reception stations
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Components Figure
Satellite 1
Uplink Provider
EUMETSATService
Management
EUMETSATas DataProvider
ExternalData
Provider 1
ExternalData
Provider n
Com m unicationlines
TurnaroundProvider 1
Users
Users
Users
TurnaroundProvider N
Satellite 2
Satellite N
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Components Data Providers
Provide, via FTP over a number of communication lines (Internet, VPN, leased lines, …), the files to be disseminated, currently:
EUMETSAT DWD (Germany) OSI SAF (Norway & France & Netherlands) Land SAF (Portugal) VITO (Belgium, Vegetation Product)
Service Management Provider (EUMETSAT) Performs all service configuration (bandwidth, users, encryption
parameters, dissemination parameters, …) to the DVB uplink provider via FTP over a secure communication line
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Components Uplink Service Provider
Receives all data to be disseminated from all data providers Co-ordinates the transmissions according to the service configuration Encrypts the data according to the user dissemination configuration Applies Forward Error Correction (FEC) to the data to be multicasted Converts the files into Digital Video Broadcast Broadcasts the signal using a commercial satellite Receives the broadcasted data by a local reference reception station for
service monitoring and service level agreement tracking Current contract with T-Systems Uplink station located in Usingen/Germany
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Components Turn around Service Provider(s)
Receives the DVB signal provided by the uplink service provider Retransmits the data (on DVB packet level) to another S/C Receives retransmitted data by a local reference reception station
for service monitoring and service level agreement tracking One turn around service implemented for African Users (not covered
by the up-link service) Current contract with Telespazio Turn around station in Fucino/Italy
Users inEurope
C-bandUsers
HotBird-6
Ku-band
AtlanticBird-3
C-band
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Components
Satellites Commercial digital TV geostationary satellites for data reception
and transmission
Up-link service S/C:• Hotbird-6
• Located at 13 degree East
• Ku-Band transponder used
Turn around service S/C:• Atlantic Bird-3
• Located at 5 degree West
• C-Band transponder used
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EUMETCast Ku-Band Coverage
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EUMETCast C-Band Coverage
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Components
Reception Stations Antenna:
Size (diameter) depending on EIRP figure at location (=> table) LNB:
For Ku-band: standard digital TV LNB For C-band: different brands, proposed by service provider and used
at EUMETSAT: California Amplifier 140105-1
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Components DVB Receiver Cards used at EUMETSAT
TechniSat SkyStar2 BroadLogic V@box 2030 Pentamedia Pent@value
Workstations Standard / state-of-the-art PC (with USB port)
Software Operating Systems: Windows suite & LINUX EUMETCast Client Software: tq®-TELLICAST
Supporting processing, monitoring & logging of incoming data Configuration constraints:
Recommended/tested combinations: Ku/C-band <=> DVB receiver card <=> Operating System
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Components
Contour Antenna Size Contour Antenna Size(dbW) diameter (m) (dbW) diameter (m)
53 0.85 39 2.4052 0.95 38 2.6951 1.07 37 3.0250 1.20 36 3.3949 1.35 35 3.8048 1.51 34 4.2747 1.70 33 4.7946 1.90 32 5.3745 2.14 31 6.0344 2.40 30 6.7643 2.69 29 7.5942 3.02
Antenna size recommendationsproviding sufficient rain margin in C- and KU-band,
based on EUMETSAT experience,scaled from highlighted antenna sizes
Ku-Band C-Band
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Components: Parts and Costs of a Reception Station
DVB Standard Hardware
LNB Ku-/C-band & Satellite Dish200/1500 EUR
DVB PCI Card 100 EUR
DVB Multicast Client Software 60 EUR
PC, Hard Disk, Ethernet 1000 EUR
1.400/2700 EUR
EUMETCast Key Unit (EKU) 40 EUR
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C-Band Reception Issues
2.4 m antenna dish recommended for Africa & Europe (3.0 to 3.7 m for some African/Indian Ocean islands)
1.8 m dish in many cases sufficient (depending also on the quality (noise temperature) of the LNB
C-band significantly less susceptible than Ku-band to rain attenuation, but suffering frequently from electromagnetic interference (mainly radar)
Implementation of bandpass filters has shown good results => elimination of (nearly) all interferences
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Current Services High Rate SEVIRI Image Data - data from Meteosat-8 Low Rate SEVIRI Image Data - data from Meteosat-8 Rapid Scanning Service (RSS) - data from Meteosat-6 High Resolution Image (HRI) - data from Meteosat-7 Indian Ocean Data Coverage (IODC) - data from Meteosat-5 EUMETSAT ATOVS Retransmission Service (EARS) Foreign Satellite Data (FSD) - data from GOES-n (MTSAT1-R to come) Data Collection and Retransmission (DCP) Meteorological Data Dissemination (MDD) Meteorological Products from MSG MPEF Meteorological Products from Satellite Application Facilities DWDSAT Basic Meteorological Data (BMD) for WMO RA VI Vegetation Product
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Data Rate per Service (average per day in Kbps)
High Rate SEVIRI Image Data 710 Low Rate SEVIRI Image Data 15 Rapid Scanning Service (RSS) 48 High Resolution Image (HRI Met-7) 40 Indian Ocean Data Coverage (IODC) 42 ATOVS Retransmission Service (EARS) 30 Foreign Satellite Data (FSD) 14 Data Collection and Retransmission (DCP) 7 Meteorological Data Dissemination (MDD) 4 Meteorological Products from MSG MPEF 39 Meteorological Products from SAFs 55 DWDSAT 190 Basic Meteorological Data for WMO RA VI 10 Vegetation Product (3 times per month) 3
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Current Allocation of Services on Channels
• Channels 2 & 3 are fed into the C-Band turn around service
PIDMulticastChannel
Services Bandwidth
500 Channel 1
BMD-RAVI
SAF-Europe
EARS & Rapid Scan Service
Basic Meteorological Data for WMO RA VI
Land SAF European ProductsOSI SAF KNMI Surface Wind Product
0.300 Mbps
0.064 Kbps
0.064 Kbps300 Channel 2 High Rate SEVIRI (all 12 spectral channels) 1.420 Mbps301 Channel 3 Low Rate SEVIRI:
(IR_016, IR_039, IR_108, VIS006,WV_062)
Meteosat-5 HRI (IODC)Meteosat-7 HRIForeign Satellite Data:
(GOES-9/MTSAT, GOES-10, GOES-12)Meteorological Products from MSG MPEFSAF Products (OSI SAF and non EuropeanLand SAF Products)DCPMDDVegetation Product S10NDVI
0.338 Mbps
302 DWDSAT DWDSAT 1.536 Mbps
APSDEU-7, 20-22 Sept 2006, Honolulu Hawaii 29
Bandwidth Management & Service Directories
Data of each channel is transmitted in the constraints of the bandwidth of the respective channel
Within a channel, priorities can be assigned Data for each channel is provided via “Service Directories” One or more Service Directories are allocated to one channel Service Directories are implemented on the uplink server Associated with each Service Directory:
Distribution list (users entitled to receive the respective products Allocation of bandwidth characteristics
Data Providers transfer their data directly into the Service Directories
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EUMETCast Multicast Configuration
ServiceDirectory
1
Distributionlist
ServiceDirectory
2
Distributionlist
ServiceDirectory
n
Distributionlist
EUMETCast Server
EU
ME
TC
ast f
iles
IP/DVB gateway
IP s
tream
DV
B s
tream
Other IP streams
DVB multiplexer Other DVB streams
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Service Monitoring
Each data provider is responsible for the monitoring of its own data
EUMETSAT monitors the end to end service for the data provided by EUMETSAT
EUMETSAT supports the service monitoring of external data providers
Each service provider (up-link service and turnaround services) is responsible for monitoring its complete service (penalties in case of failing to accomplish the service level agreement)
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Encryption Enables independent targeting of files towards a single user or
group of users Enables secure control of access at individual file & user level Encryption in accordance with EUMETSAT’s data policy Using the tq-tellicast server S/W Based on the Blowfish algorithm (symmetric 128 bit data keys) Performed in the EUMETCast uplink server Data keys valid for just one transmission Data keys encrypted with private key of target user On the fly encryption, can be switched off on a per channel basis
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Decryption Decryption by the tq-tellicast client S/W in combination
with a decryption device (EUMETCast Key Unit: EKU) and the EKU S/W package
EKU is an USB device EKU in conjunction with corresponding username and
user_key/password enables decryption of licensed services
Only data described as “essential” are decrypted without EKU
EKUs are distributed by EUMETSAT to registered users