JPNTI3 (JAPAN TIE 3) 2000 June 13 Notes prepared by Michiko Onogaki, Geographical Survey Institute Schedule name: JPNTI3.SKD on CDDISA Nominal Start: 05:00 U.T. on June 13 (day 165) first observation at 05:00 U.T. on 3C84 Duration: 24 hours Nominal Stop: 05:00 U.T. on June 14 (day 166) last observation at 05:02 U.T. on 3C273B Correlator: Koganei (CRL) Frequency Sequence: Modified S/X sequence based on CDP-SX narrow-band (360 MHz wide at X, 85 MHz wide at S) 1 letter 2 letter Station Code Code # of tapes # of obs Occupation Code Kashima-26m Q KA 5 (K-4) 377 18567601 Kashima-34m O KB 5 (K-4) 373 18575801 Tsukuba-32m T Ts 5 (K-4) 377 73452301 Kashima-11m R K1 5 (K-4) 377 Koganei-11m G Kg 5 (K-4) 375 Miura-11m B Mu 5 (K-4) 377 Tateyama-11m Y Ty 5 (K-4) 375 Purpose ======= Kashima VLBI station (26m antenna) has been the reference of geodetic VLBI experiments in Japan. However, Kashima-26m is so old that its performance is not so high in the world VLBI standard, so the GSI established Tsukuba VLBI station (32m antenna) in 1998. The domestic VLBI tie experiment (Japan-tie) is intended to perform a highly precise tie among the large antennas, Tsukuba-32m, Kashima-26m and Kashima-34m. The purpose of the JPNTI sessions is to transfer the valuable result of log period by Kashima-26m and Kashima-34m to Tsukuba-32m. Four KSP stations also participate in this experiment. Schedule ======== This is a new schedule generated by M. Onogaki with the automatic mode of sked. The following are the characteristics of the schedule: 1) This schedule was optimized for sky coverage. 2) Only the observations in the previous 3 hours of the schedule were considered for the minor options. The best 20% of the configurations were considered for minor options. 3) The "minor options" were set to select observations to maximize the total number of observations and to minimize time between scans on the same source by thirty minutes. 4) In the baselines for three stations, Kashima-26m, Kashima-34m and Tsukuba, the minimum SNR limits were set to 20 for X-band and 15 for S-band. In the baselines of four KSP stations and three stations (Kashima-26m, Kashima-34m, Tsukuba-32m), the minimum SNR limits were set to 15 for X-band and 15 for S-band. Since the baselines of KSP stations didn't take out fringe, the SNR limits were set to 0 for X-band and S-band. 5) Scan lengths were calculated based on the flux densities of observed sources and correlated amplitudes of sources to obtain SNR mentioned above. The scan lengths were then fixed in the schedule. This was necessary because the capability of the Koganei correlator to process different scan lengths has not been tested yet. Frequency Sequence =================== Modified CDP-SX narrow-band sequence by shift with -1MHz for X-band and +2MHz for S-band is used, because the frequency spacing of the P-cal signals at KSP stations are currently 5MHz. Ch.1 to Ch.8 is for X-band, and Ch.11 to Ch.16 is for S-band. The following frequency sequences are used in this experiment. Ch.9 and Ch.10 are dummies. For KASHIMA, TSUKUB32 and KASHIM34 Band Local Freq. VC# X 8209.99 1 X 8219.99 2 X 8249.99 3 X 8309.99 4 X 8419.99 5 X 8499.99 6 X 8549.99 7 X 8569.99 8 S 2219.99 9 S 2224.99 10 S 2219.99 11 S 2224.99 12 S 2239.99 13 S 2269.99 14 S 2294.99 15 S 2304.99 16 For KASHIM11, KOGANEI, MIURA and TATEYAMA Band Local Freq. VC# X 8209.99 1 X 8219.99 2 X 8249.99 3 X 8309.99 4 X 8419.99 5 X 8499.99 6 X 8549.99 7 X 8569.99 8 X 8549.99 9 X 8569.99 10 S 2219.99 11 S 2224.99 12 S 2239.99 13 S 2269.99 14 S 2294.99 15 S 2304.99 16 Antennas and Equipment ====================== Tsukuba-32m uses K-4 rack (Type 2) and K-4 recorder (Type 2). Kashima-26m uses the K-4 rack (Type 1) and K-4 recorder (Type 2). FS9 is used in each station for this experiment. Kashima-34m uses K-3 rack and K-4 recorder (Type 1). Field system developed by CRL originally is used on HP1000/A400. Four KSP stations use the K-4 rack (Type 2) and K-4 recorder (Type 2). Field system developed by CRL originally is used on NEC EWS4800 (Unix). The 10MHz frequency reference signal at Kashima34 station is shifted by 2x10^(-9) to introduce artificial fringe rate for the short baselines (Kashima34m-Kashima26m and Kashima34m-Kashima11m). Correlation =========== This experiment will be correlated at the Koganei KSP Correlator with all baselines being correlated. SKED Summary from file jpnti3.skd for experiment JPNTI3 (all scans with at least one subnet station) SOURCE |0 6 12 18 | #SCANS #OBS #Obs/bl 0003-066I xx xx xx I 6 126 13.7 0048-097Ix xx x x I 5 105 11.8 0059+581I x x x x x x x x I 8 168 8.9 0104-408I x xx xxI 5 105 22.9 0106+013I xx x x x xxI 7 147 14.9 0119+115I x I 1 21 2.0 0119+041I x x xx x I 5 105 10.4 0229+131Ix xx x x I 5 105 9.7 0235+164I x x x x xx x xI 8 168 15.1 3C84 Ix x x x xx x x xx x x x I 13 273 19.7 CTA26 I x x I 2 42 4.4 NRAO150 I x x x x x x x I 7 147 9.3 0402-362I x x I 2 42 7.5 0454-234I xx x x x x x x xI 9 189 25.3 0458-020Ix x x x x x I 6 126 13.2 0528+134I I 0 0 .0 0537-441I x x I 2 42 12.2 0552+398I x x x x I 4 84 6.2 0556+238I I 0 0 .0 0718+793I x x x x x x x I 7 147 7.0 0727-115I xx x x x x xx x xI 10 210 24.1 0749+540Ix x x x x x x x x x x I 11 231 13.9 0804+499I x I 1 21 1.4 0805+410I x x x x xI 5 105 7.6 0823+033Ixx x x xx x x xx x x I 12 252 25.2 OJ287 I x x x xx x x x xxx x xI 13 267 23.3 0919-260I x xx x xx x x I 8 168 23.8 0920-397I x x x x x I 5 105 22.5 4C39.25 I x x x x xx x I 7 147 10.9 OK290 I x xx I 3 63 5.3 0955+476I x I 1 21 1.4 1034-293I I 0 0 .0 1044+719I x x x x x x x x I 8 168 8.0 1053+815I I 0 0 .0 1104-445I I 0 0 .0 1124-186I x x x x x I 5 105 13.3 1128+385I x x x I 3 63 4.7 1144-379I x I 1 21 4.1 1219+044I x x x x I 4 84 8.4 3C273B I x x xx xx x x I 9 189 19.2 1255-316I x x x xx x I 6 126 20.2 1300+580I I 0 0 .0 1308+326I x x x x xx x x x x x I 11 225 17.8 1313-333I I 0 0 .0 1334-127I x x x x xx x I 7 147 17.2 1351-018I x I 1 21 2.2 1357+769I x x x x I 4 84 4.0 1424-418I x x x x I 4 78 18.9 1451-375I I 0 0 .0 1606+106I x xx x xx x x x xx x x I 13 267 25.3 1622-253I x xx x x x x xx I 9 189 26.4 NRAO512 I x xx x x x x I 7 147 10.8 3C345 I x x x x x x x I 7 147 10.8 1726+455I x I 1 21 1.4 1739+522I x x x x x x x x x x x I 11 231 14.4 1741-038I x xx xx xx x x xx x x I 13 273 29.2 1749+096I I 0 0 .0 1908-201I x I 1 21 2.7 1921-293I x x I 2 42 6.3 1954-388I x x x x I 4 84 16.9 1958-179I x x x x x x x x I 8 168 20.9 2121+053I x x x xx x xx x x I 10 210 20.6 2128-123I x x x I 3 63 7.3 2134+00 I x xx x xI 5 105 10.7 2145+067I I 0 0 .0 2234+282I x x x x x x x x x x x x I 12 252 20.5 3C454.3 I x x x x x x xx x xx xx I 13 273 24.6 2255-282I x x x x xx x xI 8 168 24.5 Total scans, obs: 368 7704 Average number of obs. per baseline per source (normalized by up-time) = 11.5 Min = .0 Max = 29.6 (Baseline Kb-K1 on 1741-038) RMS = 8.7 Total time: 1443 minutes ( 24.1 hours). Key: Ka=KASHIMA TS=TSUKUB32 Kb=KASHIM34 K1=KASHIM11 Kg=KOGANEI Mu=MIURA Ty=TATEYAMA Ka TS Kb K1 Kg Mu Ty Avg % obs. time: 55 55 55 55 55 55 55 55 % cal. time: 4 4 4 4 4 4 4 4 % slew time: 26 12 36 9 9 9 9 16 % idle time: 13 27 4 30 30 30 30 23 # of tapes : 5.0 5.0 5.0 5.0 5.0 5.0 5.0 total # scans: 368 368 364 368 368 368 368 367 # scans/hour : 15 15 15 15 15 15 15 15.3 Avg scan (sec): 130 130 131 130 130 130 130 130 # OF OBSERVATIONS BY BASELINE | Ka TS Kb K1 Kg Mu Ty StnTotal ------------------------------------------ Ka|368 368 364 368 368 368 368 2204 TS| 368 364 368 368 368 368 2204 Kb| 364 364 364 364 364 2184 K1| 368 368 368 368 2204 Kg| 368 368 368 2204 Mu| 368 368 2204 Ty| 368 2204 Number of 2-station scans: 0 Number of 3-station scans: 0 Number of 4-station scans: 0 Number of 5-station scans: 0 Number of 6-station scans: 4 Number of 7-station scans: 364 Total # of scans, observations: 368 7704 Average baseline components for all observations Average XY = 67. Average XZ = 58. Average YZ = 76. Average length = 84.