Simultaneous Multi-Frequency Obs. -Phase Compensation, mm-VLBI

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Presentation transcript:

Simultaneous Multi-Frequency Obs. -Phase Compensation, mm-VLBI Dual beam – Phase Compensation, Differential VLBI

Target VLBI Networks KVN (3) +VERA (7) +JVN (11-13) + CVN (~15) + VSOP-2 (16~20)  EAVN (East Asian VLBI Network) (including a 2nd gen. space-VLBI)

VLBI facilities in East Asia VSOP-2

Essential Requirements for Our VLBI Correlator Data Rate : 8Gbps/station # of stations : 10 (min.), 16, 20 (hopefully) Freq. Resolution : <0.05 km/s at 22GHz Field of View : >1 arcmin Min. Integ. Time : <25 msec For Space VLBI, Max. Delay : 32,000 km Max. Fringe Tracking Rate : 860kHz Various Playbacks : Mark5B, DIR2000, K5, Optical Fiber(e-VLBI)

Observation Mode – KVN & VERA #IF Bandwidth [MHz] Max. #Chan #Bits Data Rate [Mbps] Recorder VERA Modes 1 256 2 1,024 Mark5B DIR2000 VLBI1 1,2 128 VERA1,VLBI2 3 1,2,3,4 64 4 VERA2,VLBI3 32 8 VERA4,VSOP1 5 16 VERA7,VERA9, Geo1, Geo2, VSOP2 6 512 Geo3, Geo4, K4-1 7 1,2,3 64/128 2/1 VERA3 32/64/128 2/1/1 VERA5 9 32/128 4/1 VERA6 10 16/32/128 2/3/1 VERA8 W4 4x2,048 Mark5B+ Fiber

Framework of K-J Joint Correlator Mark5B DIR-2000 K-5 Optical Fiber Raw VLBI Data Buffer Correlation Subsystem Archive Correlator Control & Operation Responsible to KASI Responsible to NAOJ

Summary of Specifications # of Antennas 16 # of Inputs / Antenna 4 bands (4Fx1P, 2Fx2P,1Fx2P+2Fx1P) Max. # of Correlations / Input 120 Cross + 16 Auto Subarray 2 case (12 + 4, 8 + 8) Bandwidth for each Input 512 MHz Digitization for each Input 1 Gsps by 2bits/sample Clock for Input data 128 MHz Max. Delay compensation 32,000 km Max. Fringe Tracking 860 kHz FFT points 1,048,576, w.r.t. multi-channel stream Word length in FFT 16+16 bits fixed point for real & imag. Re-quantization to 4+4 bits fixed point Integration < 25 msec Data compression (Flexible Binning) 8,192 channels

Development Schedule 2005 Requirements, Specification, MOU Start of Technical Design 2006 Completion of Technical Design Start of Manufacturing (each parts) 2007 Manufacturing (each parts) Development of Control & Operation Software 2008 Assemble into whole correlator system Test and debug the correlator system (HW & SW) 2009 Start of Experimental Operation Completion of Archive System 2010 Open for Korea-Japan Joint VLBI Network Establish the K-J Joint Correlation (Data) Center

Members of the Review Committee Korea Cho Se-Hyung (KASI) Kim Hyun-Goo (KASI) Han Seog-Tae (KASI) Kim Kwang-Tae (Chungnam National Univ.) Koo Bon-Chul (Seoul National Univ.) Japan Inoue Makoto (NAOJ) Chikada Yoshihiro (NAOJ) Fujisawa Kenta (Univ. of Yamaguchi) Murata Yasuhiro (ISAS/JAXA) Takaba Hiroshi (Univ. of Gifu) Koyama Yasuhiro (NICT) China Observer : Shen Zhiqiang (SHAO)

Korea Japan System Integ. Roh☯ Kobayashi Correlator HW Oh☯, Yeom Leaders of the Working Groups System Integration Working Group Correlator Hardware Playbacks Control & Operation Software Data Analysis Korea Japan System Integ. Roh☯ Kobayashi Correlator HW Oh☯, Yeom Okumura Playbacks HW Oh Kawaguchi☯ Control/Op. SW Byun, NewStaff Shibata☯ Data analysis SW Sohn☯, PostDoc Kameno ☯ representative