1. DEVELOPMENT OF IT TECHNOLOGIES FOR SCIENTIFIC EXPERIMENTS WITH RUSSIAN SPACE TELESCOPES
Shatskaya M, Abramov A., Fedorov N., Kostenko V., Likhachev S., Seliverstov S., Sichev D.
AstroSpace Center, P. Lebedev Physical Institute, RAS, Moscow, Russia
P.N.Lebedev Institute Astrospace Center

2. Data processing center for space VLBI project Radioastron.
July 2011
Now working project.
Data processing center for space VLBI project Millimetron. Future project.
P.N.Lebedev Institute Astrospace Center

3. The aims of Data Processing Center
Radioastron project
The aims of Data Processing Center
Organization of service information exchange.
Collection and storage of all scientific information of observations.
Processing of scientific observation data.
P.N.Lebedev Institute Astrospace Center

4. Data Transferring Service information Scientific Data
Radioastron project
Service information
Scientific Data
Coordination of schedule, cyclogramas, observations reports, telemetric data, orbit data and others
Data of observation from telescopes
on-line and prompt delivery of data
delivery with delay from a day to 0.5 year
Uninterruptible service of the all systems: communication channels, the server high availability and efficiency,
High quality of channels (UDP)
Redundancy of delivery (telemetric data is delivered via 2 channels by UDP and via Internet by TCP)
but
small volume of data (less than 3 TB on 6 years period).
Low capacity of communication channels (2 Mb/c),
Large volume of data
High capacity of communication channels and servers
but
High demands on the efficiency and uninterrupted operation are not imposed

5. More Than 40 Ground Telescopes
Radioastron project
GBT USA
Medicina Italy
Tidbinbilla Australia
Urumqi China
Noto Italy
Arecibo Puerto Rico
Usuda Japan
Westerbork
the Netherlands
ATCA Australia
Effelsberg Germany
Hart Africa
Svetloe Russia
Robledo Spain
Yebes Spain
Badary Russia
Zelenchuk Russia
Onsala Sweden
Jodrell Bank UK
Parks Australia
Torun Poland
Shanghai China
et al.

6. Features of DPC of Radioastron project
Standard VLBI
Radioastron Processing Center
Equipment
MARK5, disc packs
Computers, servers
Network, channels
GEANT,
high speed dedicated channels,
delivery on disc packs
Public Internet
600 Mb/s
Sometime delivery on discs
Protocol
JIVE5ab
Tsunami, ftp
Deleting of raw data
yes no

7. Structure of Data Processing Center
Radioastron project
Total amount of data in Processing Center 2700 TB

8. Data Processing Center
Radioastron project
P.N.Lebedev Institute Astrospace Center

9. Expected July 2011 Nowadays 2017
Radioastron project
Expected
July 2011
Nowadays
2017
Ground Telescopes 5 40
Worked Simultaneously
2-3
Up to 30
Tracking stations
Pushchino
Pushchino + Green Bank
Number of observations per month 20
120
Storage
100 TB
1 PB on line
6 PB off line
DAS
Direct Attached Storage
NAS
Network Attached Storage
Dividing of processes of data collecting and archiving and processing
Deleting raw data
Yes No

10. Radioastron project
Spontaneous growing of storages and amount of computer technique, reprocessing of data
overflow of:
heating
weight of equipment
space of server room.

11. New server room Weight of equipment 6000 kg 8 server racks
Radioastron project
Weight of equipment 6000 kg
8 server racks
Input electric power 80 kW with redundancy
Fire-extinguishing system
Scalable cooling system

12. Deformational Model
Radioastron project
We carried out investigation and calculation of safe load carrying ability of the floor.

13. Distribution of Weight
Radioastron project
We laid special cover of the floor and metal frame for distribution of weight.

14. Data Processing Center of Millimetron Project
Space telescope
Control stations
Tracking station
Ground telescopes
Data processing center
Center of experiment planning
Ballistic center
Tracking headquarters
Scientific centers and users

15. Amount of Expected Information
Millimetron project
Total amount from tracking stations and 3 ground telescopes:
150 PB per year
According to 2014 Technological Workshop in Groningen
80 PB per 5 years

16. Data Center for Millimetron Project
Appropriate room or special building with protection from leaking and fire-extinguishing system
Redundant power supply
Independent power supply (diesel generator)
Uninterruptible power supply
Air-conditioning on N + 1 systems
Video surveillance and monitoring of all systems
Room for operators
Communication channels
Expected parameters:
Data 150 PB per year
Electric power about 1.3 MW
60 racks m2
40 Gb/s
100 Gb/s
Millimetron project

17. Conclusions
Operation of Data Processing Center for Radioastron project is not standard for VLBI, nevertheless DPC fully adequate to requirements of the Mission.
DPC is dynamic and growing system.
Nowadays we are working on planning and calculation of parameters of DPC for Millimetron project. Our experience of Radioastron will be useful for our next project "Millimetron“.

18. THANK YOU!