Hirabaru, Koyama, Kimura, Sekido, Takeuchi, Kondo (NICT)Lapsley, and Whitney (MIT Haystack)
Network Engineering and NOC SessionsAPAN Conference 2005 in Bangkok
January 27, 2005
e-VLBI Deployments with Research Internet
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…
Radio Telescopes
NICT Kashima Space Center 34m
Onsala Space Observatory 20m (left)
Perks 64m (right)Australia Telescope National Facility
MIT Haystack 18m
Shanghai25m
VLBI (Very Long Baseline Interferometry)de
lay
radio signal from a star
correlator
A/D clockA/D
Internet
clock
•e-VLBI geographically distributed observation, interconnecting radio antennas over the world
Large Bandwidth-Delay Product Network issue
ASTRONOMYGEODESY
~Gbps~Gbps
•Gigabit / real-time VLBI multi-gigabit rate sampling
A B
A
B
d
Updates since APAN Cairns (July 2004)
SC2004 Nov. 8-11, 2004, PittsburghJGN II Osaka Jan. 17-18, 2005, OsakaOthers (JIVE Dec.22, 2004,
Huygens Jan. 14, 2004)e-VLBI Data Transfers and Antennas
e-VLBI SC2004 Network Configuration
NICT Kashima MIT Haystack
Abilene
APAN Tokyo
Onsala
Stockholm
AMS
SUNET
e-VLBI Demonstration in SC 2004 (Nov. 2004)
MIT Haystack (Westford)GGAO (Maryland)Onsala (SE)NICT Kashima (JP)
first 20 minutes every hours512 Mbps with Haystack and GGAO256 Mbps with all 4 stations
Alan Whitney (Haystack)
Charles Yun (I2)Correlationfrom Haystack Mark 5
Kashima to Haystackvia Tokyo XP
MITHaystack
NICTKashima
Abilene(10G)
JGN II Int’l(10G) Tokyo
JGN II(1G/10G)
1G/2.5GJGN II(10G)
Osaka
Venue
10G
#1
#2
#3
#4
GEN-AGEN-B
AA
BB
AA BB
TT
SX SX
T x4
Raid
Raid
ファイバーチャンネル
LCDLCD
NE (Network Emulator)
NE
T x4
SX x2
SX x2
ファイバーチャンネル
TT
LCDLCD
Measure-B Measure-A
e-VLBI Demonstration by NICT JGN II Symposium in OsakaJanuary 17-18, 2005
e-VLBI Demonstration in JGN II Osaka (Jan. 2005)
e-VLBI data transfer achieved ~700Mbps from Haystack to Osaka
~900Mbps from Kashima to Osaka
Software Cross Correlation ~240Mbps per station
Dr. Koyama
4 Apple G5 Server machines (8 CPUs in Total)
Huygens e-VLBI Preliminary ReportJanuary 5, 2005 Shanghai to Kashima 1-2 Mbps for 3.8GB x4January 14, 2005 Shanghai to Kashima 40-50 Mbps
No fringe detected
Japan - Australia (tsunami)experiment under consideration(Australia Telescope National Facility)
"Jouko Ritakari" [email protected] reported December 22, 2004400 Mbit/s eVLBI transfer between NICT Kashima and JIVE using Tsunami protocol.
Kashima-JIVE e-VLBI experiment (Dec.22, 2004)
Possible Future e-VLBI experiment with RussiaNICT Kashima shipped IP VLBI board to Russia (Lebedev Institute)Fibers are available in the nearest town.
e-VLBI Data Transfer
Real-time e-VLBI – flat-rate live data transfer
Common e-VLBI – file transfer
InternetSynchronize
Correlation
Carry the disk to the nearest stationto put on-line
Correlate among many combinations concurrently to get more precise data (like a virtual huge antenna)
Future - multicast
VLBI Antenna Locations in North-East Asia
Shintotsukawa 3.8m
Tomakomai 11m, FTTH (100M)70km from Sapporo
Mizusawa 10m 20m118km from Sendai
Tsukuba 32m, OC48/ATMx2 SuperSINETKashima 34m, 1Gx2 JGN, OC48/ATM Galaxy
Yamaguchi 32m1G, 75M SINET
Gifu 11m 3m, OC48/ATMx2 SuperSINET
Usuda 64m, OC48/ATM Galaxy
Nobeyama 45mOC48/ATM Galaxy
Nanshan (Urumqi) 25m70km from Urumqi
Koganei 34m, 1Gx2 JGN, OC48/ATM Galaxy
Miyun (Beijing) 50m50km from Beijing
2Mbps
2Mbps
Yunnan (Kunming) 3m (40m)10km from Kunming
Sheshan (Shanghai) 25m30km from Shanghai
Observatory is on CSTNET at 100M
Jeju 20mTamna U
Seoul 20mYonsei U
Ulsan 20mU Ulsan
Daejon 14mTaeduk
Ishigaki 20m
Ogasawara 20mChichijima 10m
Iriki 20m Kagoshima 6mAira 10m
Legend
connectednot yet connectedantenna under construction
