Transcript EUMETCast EUMETSAT’s Broadcast System for Environmental Data EUMETCast Presentation Page 1 Concept & Overview • • • • • • Generic, multi-mission dissemination system based on the standard DVB multicast technology Use of.

EUMETCast
EUMETSAT’s Broadcast System
for Environmental Data
EUMETCast Presentation
Page 1
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
EUMETCast Presentation
Page 2
Components Figure
Data
Provider 1
Communication
lines
Satellite 1
Satellite 2
Turnaround
Provider 1
Data
Provider 2
Users
Users
Uplink Provider
Satellite N
Data
Provider n
Turnaround
Provider N
Users
Service
Management
EUMETCast Presentation
Page 3
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)
VITO (Belgium, Vegetation Products)
• 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
EUMETCast Presentation
Page 4
Data Providers & Service Management Provider
Data
DVB BROADCAST
Service Management
Other Sources
DWD
EUMETSAT
DVB
UPLINK
USERS
SAFs
EUMETCast Presentation
Page 5
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 uplink service)
– Current contract with Telespazio
– Turn around station in Fucino/Italy
EUMETCast Presentation
Page 6
EUMETCast Presentation
Page 7
Components
• Satellites
– Commercial digital TV geostationary satellites for data reception and
transmission
– Uplink 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
EUMETCast Presentation
Page 8
EUMETCast Ku-Band Coverage
EUMETCast Presentation
Page 9
EUMETCast C-Band Coverage
EUMETCast Presentation
Page 10
Components
• (Reference) Reception Stations
– Same equipment for different purpose
 Reference reception stations for monitoring of the health of the
system and for service level agreement tracking
 Reception stations for the end users
– Consisting of antenna/feed/LNB, DVB receiver card, Workstation & S/W
– 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
EUMETCast Presentation
Page 11
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
EUMETCast Presentation
Page 12
Components
EIRP to Dish Size Conversion Table (indicative)
EIRP, dBW
Dish, cm
51
60
50
67
49
75
48
85
47
95
45
120
42
160
40
200
39
240
37
300
EUMETCast Presentation
Page 13
Components: Parts and Costs
of a Reception Station
DVB Standard Hardware
LNB Ku-/C-band & Satellite Dish
200/1000 EUR
DVB PCI Card
100 EUR
DVB Multicast Client software
60 EUR
EUMETCast key unit (EKU)
40 EUR
PC, Hard disk, Ethernet
800 EUR
1.200/2000 EUR
EUMETCast Presentation
Page 14
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
EUMETCast Presentation
Page 15
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
Data Collection and Retransmission (DCP)
Meteorological Data Dissemination (MDD)
Meteorological Products (including Satellite Application Facility
products)
 EUMETSAT ATOVS Retransmission Service (EARS)
 Foreign Satellite Data (FSD)
 DWDSAT
EUMETCast Presentation
Page 16
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
• Each service provider (uplink service and turnaround services)
is responsible for monitoring its complete service (penalties in
case of failing to accomplish the service level agreement)
EUMETCast Presentation
Page 17
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
EUMETCast Presentation
Page 18
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
EUMETCast Presentation
Page 19
EUMETCast Licensed & Essential Services
• Licensed Services
– Subject to a Licensing Procedure
– Involving Secretariat and National Met Services
– Comprising forms, tellicast S/W and EKUs
• Essential Services
– No licensing, but registration by the Secretariat
– Provision of tellicast S/W & generic username/password
– EKU not required
EUMETCast Presentation
Page 20
User Registration
• Steps for Access to the EUMETCast Services:
– Complete the EUMETCast Registration Form, indicating the
requested services
– If access to licensed service(s) requested, EUMETSAT’s User
Service Helpdesk will forward your Registration Form to the
relevant Licensing Agent (generally the National Met Service)
– Once licensing procedure completed (and bill paid for
EUMETCast Client S/W & EKU):
 Access granted (by encryption configuration)
 Reception of EUMETCast Client S/W
 Reception of username and user_key/password
 Reception of EKU (if required)
EUMETCast Presentation
Page 21
EUMETCast Delivered Services (Registration Figures)
EUMETCast Delivered Services
1000
900
800
700
SEVIRI
RSS
600
DWDSAT
DCP
500
HRI 0
HRI IODC
400
MDD
EUMETCast Software/Stations
300
200
100
0
Dec-03 Jan-04
Feb-04
Mar-04
Apr-04
May-04 Jun-04
Jul-04
Aug-04 Sep-04
Oct-04
Nov-04 Dec-04
EUMETCast Presentation
Page 22
EUMETCast Service Availability
• EURD figure (complete & timely Repeat Cycles): 95%
• MOSS figure (complete & timely Repeat Cycles): 99%
• Service Level Agreement (SLA) with both service providers
(T-Systems and TELESPAZIO): 99.50%
• Ku-band Performance (following graph):
 T-Systems HRIT segment figures only, comprising performance of
uplink system, Hotbird-6 and reference reception station
• C-band Performance (following graph):
 TELESPAZIO HRIT segments figures only, comprising perf. of
turn-around system, Atlantic Bird-3 and ref. reception station
 Total Performance (following graph):
 Percentage of complete and timely received Repeat Cycles,
covering all non-availabilities (Ground Segment & Service Prov.)
EUMETCast Presentation
Page 23
EUMETCast Service Availability
100.00%
Ku-band
C-Band
Perfect Repeat Cycles
99.00%
98.00%
97.00%
Jan-04
Feb-04
Mar-04
Apr-04
May-04
Jun-04
Jul-04
Aug-04
Sep-04
Oct-04
96.00%
95.00%
94.00%
93.00%
92.00%
Ku-Band
HR Seg.
99.93%
99.98%
100.00%
99.99%
100.00%
99.78%
99.69%
99.96%
99.97%
99.98%
C-Band
HR Seg.
99.79%
99.68%
99.74%
99.89%
100%
99.78%
99.99%
99.99%
99.99%
99.99%
Perfect
RCs
98.80%
97.15%
99.10%
98.00%
97.40%
97.50%
98.52%
99.69%
98.24%
91.00%
90.00%
Jan-04
Feb-04
Mar-04
Apr-04
May-04
Jun-04
Jul-04
Aug-04
Sep-04
Oct-04
EUMETCast Presentation
Page 24
EUMETCast Service Extensions Envisaged
•
•
•
Evolution of Meteosat-8 meteorological products
– New products based on prototyping by MET (Clear sky Reflectance Map
product (CRM) being the next one)
– Updates of existing products based on operational experience
VEGETATION derived products for Africa
– VEGETATION products from the VEGETATION instrument on SPOT
– Operational trial phase has started, dissemination of 10 day Vegetation
Index product (S10NDVI) to Users in Africa
EUMETCast/EPS Convergence
– EPS global products to be disseminated using EUMETCast;
– Initially, this focuses on level 1 and 2 global products generated in the
CGS at EUM;
– Global level 1 and 2 PDUs per instrument will be available as a
EUMETCast service;
– Will be extended to SAF products as appropriate.
EUMETCast Presentation
Page 25
EUMETCast Service Extensions Envisaged
•
•
•
EUMETCast coverage extension to South America
– implementation of a turn-around system – similar to that provided by
TELESPAZIO for Africa => under discussion with member states
Basic meteorological Data from WMO regional Association VI
– RA VI is Europe and Middle East
– Use of EUMETCast for basic provision of observations and forecasts
– Working Group under RA VI is establishing user requirements
– Formal proposal to EUMETSAT delegate bodies presented
Extension of DWDSAT service planned by DWD (Spring 2005)
EUMETCast Presentation
Page 26