1. e-VLBI Deployments with Research Internet
Network Engineering and NOC Sessions APAN Conference 2005 in Bangkok
January 27, 2005
Hirabaru, Koyama, Kimura, Sekido, Takeuchi, Kondo (NICT) Lapsley, and Whitney (MIT Haystack)

2. Acknowledgement MAX Gigapop (Jerry Sobieski) TransPAC (Chris Robb)
NORDUnet (Lars Fischer)
APAN Tokyo NOC (Tanaka, Hattori, Matsui)
JGN II NOC (Kakinuma, Hori, Hatachi, Nakamura)
NICT R&D NOC (Machizawa, Takemoto, Kitamura)
Internet2 (Charles Yun)
Metsahovi Radio Observatory (Jouko Ritakari)
MIT Haystack (Jason SooHoo, Kevin Dudevoir) Shanghai Observatory (An Tao)
JIVE (Sergei Pogrebenko)
SURFnet (Erik Radius)
Other many networks and institutions…

3. Radio Telescopes Shanghai 25m NICT Kashima Space Center 34m
Perks 64m (right) Australia Telescope National Facility
Onsala Space Observatory 20m (left)
MIT Haystack 18m

4. VLBI (Very Long Baseline Interferometry)
e-VLBI geographically distributed observation, interconnecting radio antennas over the world
radio signal from a star
delay
ASTRONOMY A B
GEODESY
Gigabit / real-time VLBI multi-gigabit rate sampling
A/D
clock
A/D
clock
Large Bandwidth-Delay Product Network issue
~Gbps
~Gbps
Internet d A
correlator B

5. Updates since APAN Cairns (July 2004)
SC2004 Nov. 8-11, 2004, Pittsburgh
JGN II Osaka Jan , 2005, Osaka
Others (JIVE Dec.22, 2004, Huygens Jan. 14, 2004)
e-VLBI Data Transfers and Antennas

6. e-VLBI SC2004 Network Configuration
NICT Kashima
MIT Haystack
SUNET
Stockholm
AMS
APAN Tokyo
Onsala
Abilene
e-VLBI SC2004 Network Configuration

7. e-VLBI Demonstration in SC 2004 (Nov. 2004)
MIT Haystack (Westford) GGAO (Maryland)
Onsala (SE) NICT Kashima (JP)
first 20 minutes every hours
512 Mbps with Haystack and GGAO
256 Mbps with all 4 stations
Correlation from Haystack
Charles Yun (I2)
Kashima to Haystack via Tokyo XP
Mark 5
Alan Whitney (Haystack)

8. A B LCD LCD LCD LCD A B e-VLBI Demonstration by NICT
JGN II Int’l
(10G)
Tokyo
Osaka
MIT Haystack
Abilene (10G) A
JGN II
(10G)
1G/2.5G
JGN II
(1G/10G)
10G
NICT Kashima B
Venue
LCD
LCD SX SX T T
GEN-B
GEN-A
Measure-B
Measure-A T T
T x4
T x4
LCD
LCD #1 A B #2
e-VLBI Demonstration by NICT
JGN II Symposium in Osaka
January 17-18, 2005 NE
ファイバー
チャンネル #3
SX x2
Raid #4
ファイバー
チャンネル
SX x2
Raid
NE (Network Emulator)

9. e-VLBI Demonstration in JGN II Osaka (Jan. 2005)
Dr. Koyama
Software Cross Correlation ~240Mbps per station
e-VLBI data transfer achieved ~700Mbps from Haystack to Osaka ~900Mbps from Kashima to Osaka
4 Apple G5 Server machines (8 CPUs in Total)

10. Huygens e-VLBI Preliminary Report
Kashima-JIVE e-VLBI experiment (Dec.22, 2004)
"Jouko Ritakari" reported December 22, Mbit/s eVLBI transfer between NICT Kashima and JIVE using Tsunami protocol.
Huygens e-VLBI Preliminary Report
January 5, 2005 Shanghai to Kashima 1-2 Mbps for 3.8GB x4 January 14, 2005 Shanghai to Kashima Mbps
No fringe detected
Japan - Australia (tsunami) experiment under consideration
(Australia Telescope National Facility)
Possible Future e-VLBI experiment with Russia
NICT Kashima shipped IP VLBI board to Russia (Lebedev Institute)
Fibers are available in the nearest town.

11. e-VLBI Data Transfer Real-time e-VLBI – flat-rate live data transfer
Internet
Correlation
Synchronize
Common e-VLBI – file transfer
Carry the disk to the nearest station to put on-line
Future - multicast
Correlate among many combinations concurrently to get more precise data (like a virtual huge antenna)

12. VLBI Antenna Locations in North-East Asia
VLBI Antenna Locations in North-East Asia
Shintotsukawa 3.8m
Nanshan (Urumqi) 25m 70km from Urumqi
Tomakomai 11m, FTTH (100M) 70km from Sapporo
Miyun (Beijing) 50m 50km from Beijing
Nobeyama 45m OC48/ATM Galaxy
Mizusawa 10m 20m 118km from Sendai
Seoul 20m Yonsei U
Usuda 64m, OC48/ATM Galaxy
Daejon 14m Taeduk
2Mbps
Ulsan 20m U Ulsan
Tsukuba 32m, OC48/ATMx2 SuperSINET
Kashima 34m, 1Gx2 JGN, OC48/ATM Galaxy
Jeju 20m Tamna U
Koganei 34m, 1Gx2 JGN, OC48/ATM Galaxy
Observatory is on CSTNET at 100M
Gifu 11m 3m, OC48/ATMx2 SuperSINET
Iriki 20m
Kagoshima 6m Aira 10m
Sheshan (Shanghai) 25m 30km from Shanghai
Yamaguchi 32m 1G, 75M SINET
2Mbps
Yunnan (Kunming) 3m (40m) 10km from Kunming
Ogasawara 20m
Chichijima 10m
Ishigaki 20m
Legend
connected
not yet connected
antenna under construction