JPNTI5 (JAPAN TIE 5) 2000 October 11 Notes prepared by Michiko Onogaki, Geographical Survey Institute Schedule name: JPNTI5.SKD on CDDISA Nominal Start: 05:00 U.T. on October 11 (day 285) first observation at 05:00 U.T. on 3C345 Duration: 24 hours Nominal Stop: 05:00 U.T. on October 12 (day 286) last observation at 05:02 U.T. on 2234+282 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) 353 18567601 Kashima-34m O KB 5 (K-4) 349 18575801 Tsukuba-32m T Ts 5 (K-4) 353 73452301 Kashima-11m R K1 5 (K-4) 353 Koganei-11m G Kg 5 (K-4) 353 Miura-11m B Mu 5 (K-4) 353 Tateyama-11m Y Ty 5 (K-4) 352 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 jpnti5.skd for experiment JPNTI5 (all scans with at least one subnet station) SOURCE |0 6 12 18 | #SCANS #OBS #Obs/bl 0003-066I x x x I 3 63 6.9 0048-097I x xx xx x x I 7 147 16.6 0059+581Ix xx x x x x x x I 9 189 10.0 0104-408I x x x x I 4 84 18.6 0106+013I x x x x x x I 6 126 12.8 0119+115I x I 1 21 2.0 0119+041I xx x x x x I 6 126 12.5 0208-512I I 0 0 .0 0229+131I x x x I 3 63 5.8 0235+164I x x x x x x x x I 8 168 15.1 3C84 Ix x xx x x x x x x x xx x x I 15 315 22.7 CTA26 I x x I 2 42 4.4 NRAO150 Ix x x x x x x x x x I 10 210 13.3 0402-362I x x x x I 4 84 15.2 0454-234I x x xx xx x xx I 9 189 25.5 0458-020I x x x x x x x x I 8 168 17.7 0528+134I x x x x x xx I 7 147 13.5 0537-441I x x x I 3 63 18.3 0552+398I x I 1 21 1.5 0556+238I I 0 0 .0 0637-752I I 0 0 .0 0718+793I x x x x x x x I 7 147 7.0 0727-115I xx x xx x x xI 8 168 19.3 0749+540Ix x x x x x x x x x x I 11 225 13.5 0804+499I x I 1 21 1.4 0805+410I x x x x x x x x I 8 168 12.2 0823+033I x x x x x xx x xI 9 189 18.9 OJ287 I x xx xx x x x xx x xI 12 252 22.0 0919-260I x x x x x x x x xI 9 183 25.7 0920-397I x x x x xI 5 99 20.9 4C39.25 Ix x x x I 4 84 6.2 OK290 I x x x I 3 63 5.3 0955+476I I 0 0 .0 1034-293I I 0 0 .0 1044+719I x x x x x x x I 7 147 7.0 1053+815I I 0 0 .0 1057-797I I 0 0 .0 1104-445I I 0 0 .0 1124-186I x x x I 3 63 7.9 1128+385I x x I 2 42 3.1 1144-379I I 0 0 .0 1219+044I x x x xxI 5 105 10.4 3C273B I I 0 0 .0 1255-316I x x x xx x xI 7 147 23.3 1308+326I x x x x x x x x x x x I 11 231 18.2 1313-333I I 0 0 .0 1334-127I I 0 0 .0 1351-018I I 0 0 .0 1357+769I x x x x x x I 6 126 6.0 1424-418I x x x x I 4 78 19.0 1451-375I x I 1 21 4.1 1606+106I x x xx x x xx x x x xI 12 252 23.7 1610-771I I 0 0 .0 1622-253I x xx x xx x I 7 147 20.5 NRAO512 I x x x x I 4 84 6.2 3C345 I x x xx x x x x x xI 10 210 15.4 1726+455I I 0 0 .0 1739+522I x x x x x x x x x x x x xI 13 273 17.0 1741-038I x x x x x x x x xx x I 11 231 24.7 1749+096I x x I 2 42 4.0 1815-553I I 0 0 .0 1908-201I x x x x x x x I 7 147 18.9 1921-293I xx x I 3 63 9.5 1954-388I x x x x x I 5 105 21.1 1958-179I x x I 2 42 5.2 2005-489I I 0 0 .0 2052-474I I 0 0 .0 2121+053I xx x x x I 5 105 10.3 2128-123I x x x I 3 63 7.3 2134+00 I x x x x x x x x I 8 168 17.2 2145+067I I 0 0 .0 2234+282I x x x x x x x xx x x x I 13 273 22.3 3C454.3 I x x x x xx x x x x xx I 12 246 22.3 2255-282I x x x x x x x I 7 147 21.5 Total scans, obs: 353 7383 Average number of obs. per baseline per source (normalized by up-time) = 11.0 Min = .0 Max = 26.8 (Baseline K1-Kg on 0919-260) RMS = 8.4 Total time: 1444 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: 57 57 56 57 57 57 57 57 % cal. time: 4 4 4 4 4 4 4 4 % slew time: 33 13 34 8 8 8 8 16 % idle time: 5 25 5 30 30 30 30 22 # of tapes : 5.0 5.0 5.0 5.0 5.0 5.0 5.0 total # scans: 353 353 349 353 353 353 352 352 # scans/hour : 14 14 14 14 14 14 14 14.7 Avg scan (sec): 140 140 140 140 140 140 140 140 # OF OBSERVATIONS BY BASELINE | Ka Ts Kb K1 Kg Mu Ty StnTotal ------------------------------------------ Ka|353 353 349 353 353 353 352 2113 Ts| 353 349 353 353 353 352 2113 Kb| 349 349 349 349 348 2093 K1| 353 353 353 352 2113 Kg| 353 353 352 2113 Mu| 353 352 2113 Ty| 352 2108 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: 5 Number of 7-station scans: 348 Total # of scans, observations: 353 7383 Average baseline components for all observations Average XY = 67. Average XZ = 58. Average YZ = 76. Average length = 84.