COVER INFORMATION Station: SHANGHAI (Code Sh ) Experiment: Snapshot Ionospheric Testing Observations Exp. Code: N05L2 Schedule Version: 1.20 Processed by SCHED version: 6.01 Release: Late March 2005 PI: James M Anderson Address: Joint Institute for VLBI in Europe Oude Hoogeveensedijk 4 7991 PD Dwingeloo The Netherlands Phone: +31 (0)521 596 542 EMAIL: anderson@jive.nl Fax: +31 (0)521 596 539 Phone during observation: +31 (0)521 596 500 Observing mode: Snapshot observations of sources at 18cm (256 Mb/s) Notes: ALBUS Ionospheric modeling test observations Fringe Finder is 3C273B, which is very strong Phase referencing is too fast for JODRELL1 All targets are strong Schedule for SHANGHAI (Code Sh ) Page 2 Snapshot Ionospheric Testing Observations UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Thu 2 Jun 2005 Day 153 --- Next scan frequencies: 1637.99 1637.99 1645.99 1645.99 1653.99 1653.99 1661.99 1661.99 Next BBC frequencies: 562.01 562.01 554.01 554.01 546.01 546.01 538.01 538.01 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 16 00 00 3C273B 16 49 41 22.3 258.3 4.3 57.0 0 1 1 0 16 00 00 16 05 20 --- 16 55 02 21.1 259.1 4.4 57.3 320 F 1 0 16 08 20 J1215-1731 16 58 02 6.7 244.8 4.7 54.4 130 1 1 0 16 08 20 16 09 20 =1213-172 16 59 02 6.5 244.9 4.7 54.5 60 F 1 0 16 11 00 J1215-1731 17 00 43 6.2 245.2 4.7 54.6 97 1 1 0 16 11 00 16 12 40 =1213-172 17 02 23 5.9 245.4 4.8 54.8 100 F 1 0 16 14 20 J1215-1731 17 04 03 5.5 245.6 4.8 54.9 97 1 1 0 16 14 20 16 16 00 =1213-172 17 05 44 5.2 245.9 4.8 55.1 100 F 1 0 16 47 40 3C273B 17 37 29 12.1 265.0 5.1 58.6 1860 1 1 0 16 47 40 16 55 40 --- 17 45 30 10.4 266.0 5.3 58.7 480 F 1 0 16 58 40 J1224+0330 17 48 31 9.6 268.3 5.4 59.0 174 1 1 0 16 58 40 16 59 40 =1222+037 17 49 31 9.4 268.4 5.4 59.0 60 F 1 0 16 59 40 J1222+0413 17 49 31 9.3 269.3 5.4 59.1 -4 1 1 0 16 59 40 17 01 20 =1219+044 17 51 11 8.9 269.5 5.5 59.2 96 F 1 0 17 01 20 J1224+0330 17 51 11 9.1 268.6 5.4 59.0 -4 1 1 0 17 01 20 17 03 00 =1222+037 17 52 51 8.7 268.8 5.5 59.1 96 F 1 0 17 03 00 J1222+0413 17 52 51 8.5 269.8 5.5 59.2 -4 1 1 0 17 03 00 17 04 40 =1219+044 17 54 32 8.2 270.0 5.5 59.2 96 F 1 0 17 04 40 J1224+0330 17 54 32 8.4 269.0 5.5 59.1 -4 1 1 0 17 04 40 17 06 20 =1222+037 17 56 12 8.0 269.3 5.5 59.1 96 F 1 0 17 06 20 J1222+0413 17 56 12 7.8 270.2 5.6 59.2 -4 1 1 0 17 06 20 17 08 00 =1219+044 17 57 52 7.5 270.4 5.6 59.2 96 F 1 0 17 08 00 J1224+0330 17 57 52 7.6 269.5 5.5 59.1 -4 1 1 0 17 08 00 17 09 40 =1222+037 17 59 32 7.3 269.7 5.6 59.1 96 F 1 0 Schedule for SHANGHAI (Code Sh ) Page 3 Snapshot Ionospheric Testing Observations UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Thu 2 Jun 2005 Day 153 --- 17 11 20 J1224+0330 18 01 13 6.9 269.9 5.6 59.1 97 1 1 0 17 11 20 17 13 00 =1222+037 18 02 53 6.6 270.1 5.6 59.1 100 F 1 0 17 14 40 J1224+0330 18 04 33 6.2 270.3 5.7 59.1 97 1 1 0 17 14 40 17 16 20 =1222+037 18 06 14 5.8 270.5 5.7 59.1 100 F 1 0 17 20 40 J1636+2112 18 10 34 66.8 250.4 1.6 59.9 55 1 1 0 17 20 40 17 21 40 =1634+213 18 11 34 66.6 250.7 1.6 60.1 60 F 1 0 17 21 40 J1644+1813 18 11 34 66.6 241.7 1.4 52.5 -20 1 1 0 17 21 40 17 23 20 =1642+183 18 13 15 66.3 242.3 1.5 52.9 80 F 1 0 17 23 20 J1636+2112 18 13 15 66.3 251.1 1.6 60.4 -20 1 1 0 17 23 20 17 25 00 =1634+213 18 14 55 66.0 251.6 1.6 60.6 80 F 1 0 17 25 00 J1644+1813 18 14 55 65.9 242.9 1.5 53.3 -20 1 1 0 17 25 00 17 26 40 =1642+183 18 16 35 65.6 243.4 1.5 53.7 80 F 1 0 17 26 40 J1636+2112 18 16 35 65.6 252.1 1.7 60.9 -19 1 1 0 17 26 40 17 28 20 =1634+213 18 18 15 65.3 252.5 1.7 61.2 81 F 1 0 17 28 20 J1644+1813 18 18 15 65.3 244.0 1.6 54.1 -19 1 1 0 17 28 20 17 30 00 =1642+183 18 19 56 65.0 244.6 1.6 54.5 81 F 1 0 17 30 00 J1636+2112 18 19 56 64.9 253.0 1.7 61.4 -19 1 1 0 17 30 00 17 31 40 =1634+213 18 21 36 64.6 253.4 1.7 61.7 81 F 1 0 17 31 40 J1641+2257 18 21 36 66.4 255.9 1.7 64.4 -8 1 1 0 17 31 40 17 33 20 =1639+230 18 23 16 66.0 256.3 1.7 64.6 92 F 1 0 17 33 20 J1636+2112 18 23 16 64.2 253.8 1.8 61.9 -8 1 1 0 17 33 20 17 35 00 =1634+213 18 24 57 63.9 254.3 1.8 62.1 92 F 1 0 17 35 00 J1641+2257 18 24 57 65.7 256.7 1.7 64.8 -8 1 1 0 17 35 00 17 36 40 =1639+230 18 26 37 65.3 257.1 1.7 65.0 92 F 1 0 17 36 40 J1636+2112 18 26 37 63.6 254.7 1.8 62.3 -8 1 1 0 17 36 40 17 38 20 =1634+213 18 28 17 63.2 255.1 1.9 62.6 92 F 1 0 17 38 20 J1641+2257 18 28 17 65.0 257.5 1.8 65.2 -8 1 1 0 17 38 20 17 40 00 =1639+230 18 29 57 64.6 257.9 1.8 65.4 92 F 1 0 17 41 00 J1636+2112 18 30 58 62.7 255.7 1.9 62.9 51 1 1 0 17 41 00 17 41 40 =1634+213 18 31 38 62.5 255.9 1.9 62.9 40 F 1 0 Schedule for SHANGHAI (Code Sh ) Page 4 Snapshot Ionospheric Testing Observations UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Thu 2 Jun 2005 Day 153 --- 17 41 40 J1642+2523 18 31 38 65.4 263.3 1.8 70.3 -17 1 1 0 17 41 40 17 43 20 =1640+254 18 33 18 65.1 263.6 1.8 70.4 83 F 1 0 17 43 20 J1636+2112 18 33 18 62.2 256.2 1.9 63.1 -17 1 1 0 17 43 20 17 45 00 =1634+213 18 34 58 61.8 256.6 2.0 63.3 83 F 1 0 17 45 00 J1642+2523 18 34 58 64.7 263.9 1.9 70.5 -17 1 1 0 17 45 00 17 46 40 =1640+254 18 36 38 64.4 264.2 1.9 70.5 83 F 1 0 17 46 40 J1636+2112 18 36 38 61.5 257.0 2.0 63.5 -17 1 1 0 17 46 40 17 48 20 =1634+213 18 38 19 61.1 257.3 2.0 63.7 83 F 1 0 17 48 20 J1642+2523 18 38 19 64.0 264.5 1.9 70.6 -16 1 1 0 17 48 20 17 50 00 =1640+254 18 39 59 63.7 264.8 2.0 70.7 84 F 1 0 17 50 00 J1636+2112 18 39 59 60.8 257.7 2.1 63.8 -16 1 1 0 17 50 00 17 51 40 =1634+213 18 41 39 60.4 258.0 2.1 64.0 84 F 1 0 17 51 40 J1642+2523 18 41 39 63.3 265.1 2.0 70.8 -16 1 1 0 17 51 40 17 53 20 =1640+254 18 43 20 63.0 265.4 2.0 70.8 84 F 1 0 17 53 20 J1644+1813 18 43 20 60.3 251.2 2.0 58.6 -30 1 1 0 17 53 20 17 55 00 =1642+183 18 45 00 60.0 251.6 2.0 58.8 70 F 1 0 17 55 00 J1642+2523 18 45 00 62.6 265.6 2.0 70.9 -30 1 1 0 17 55 00 17 56 40 =1640+254 18 46 40 62.2 265.9 2.1 71.0 70 F 1 0 17 56 40 J1644+1813 18 46 40 59.7 252.0 2.0 59.0 -30 1 1 0 17 56 40 17 58 20 =1642+183 18 48 20 59.3 252.4 2.1 59.3 70 F 1 0 17 58 20 J1642+2523 18 48 20 61.9 266.2 2.1 71.0 -29 1 1 0 17 58 20 18 00 00 =1640+254 18 50 01 61.5 266.4 2.1 71.1 71 F 1 0 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: eo999.18cm Matches group sh18cm in /aps3/sched/catalogs/freq.dat Huang Xinyong 170300, dual pol but narrow(?) Setup group: 8 Station: SHANGHAI Total bit rate: 256 Format: MKIV1:2 Bits per sample: 2 Sample rate: 16.000 Number of channels: 8 Passes/head pos: 1 Speedup factor: 1.00 1st LO= 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 Net SB= U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 2 3 4 5 6 7 8 BBC SB= L L L L L L L L IF = C A C A C A C A The following frequency sets based on this setup were used. Frequency Set: 8 Setup file default. Used pcal sets: 1 LO sum= 1637.99 1637.99 1645.99 1645.99 1653.99 1653.99 1661.99 1661.99 BBC fr= 562.01 562.01 554.01 554.01 546.01 546.01 538.01 538.01 Bandwd= 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = 1MHZ PCALXB1= S1 S3 S5 S7 S1 S3 S5 S7 PCALXB2= S2 S4 S6 S8 S2 S4 S6 S8 PCALFR1= 10 10 10 10 6010 6010 6010 6010 PCALFR2= 10 10 10 10 6010 6010 6010 6010 Track assignments are: track1= 2, 10, 18, 26, 3, 11, 19, 27 barrel=roll_off SOURCE LIST -- Snapshot Ionospheric Testing Observations Catalog positions marked with *. Precession of date coordinates is based on stop time of first scan. Names used in schedule marked with *. Short names used in VLA and SNAP files marked with +. Observation date used in B1950/J2000 coordinate conversion (PRECDATE): 1979.900 No adjustments are made for rates (DRA, DDEC). Scan hours are for recording scans only. Baseline hours are only counted for scans above horizon at both ends. Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * J1159-2148 11 57 18.309811 * 11 59 51.906111 12 00 08.364401 0.27 1157-215 -21 32 11.49992 *-21 48 53.70757 -21 50 49.17241 0.78 J1159-21 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.250 scan hours, 8.429 baseline hours above horizon. * J1159-2228 11 56 37.757633 * 11 59 11.267254 11 59 27.707413 0.35 1156-221 -22 11 54.71372 *-22 28 36.90237 -22 30 32.54328 0.94 J1159-22 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 2.594 baseline hours above horizon. * J1212-2221 12 09 28.653794 * 12 12 03.697609 12 12 20.379490 0.31 1209-220 -22 05 10.38854 *-22 21 51.51342 -22 23 47.29736 0.86 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.139 scan hours, 3.385 baseline hours above horizon. * J1215-1731 12 13 11.668001 * 12 15 46.751756 12 16 03.492656 0.21 1213-172 -17 15 05.20060 *-17 31 45.40297 -17 33 39.75883 0.31 J1215-17 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.139 scan hours, 5.260 baseline hours above horizon. * J1218-0119 12 16 01.062434 * 12 18 34.929793 12 18 51.681004 0.28 1216-010 -01 03 15.08668 *-01 19 54.34138 -01 21 43.60871 0.52 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.056 scan hours, 1.312 baseline hours above horizon. * J1222+0413 12 19 49.255029 * 12 22 22.549619 12 22 39.310892 0.30 1219+044 04 29 53.60837 * 04 13 15.77616 04 11 28.33343 0.20 J1222+04 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 3.206 baseline hours above horizon. * J1224+0330 12 22 19.097168 * 12 24 52.421934 12 25 09.193350 0.31 1222+037 03 47 27.06610 * 03 30 50.29295 03 29 02.64562 0.24 J1224+03 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.156 scan hours, 6.701 baseline hours above horizon. J1229+0203 12 26 33.245835 * 12 29 06.699731 12 29 23.494262 0.30 1226+023 02 19 43.30564 * 02 03 08.59814 02 01 20.55370 0.20 3C273 /aps3/sched/catalogs/sources.vlba * 3C273B VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro J1229+02 0.222 scan hours, 12.119 baseline hours above horizon. * J1636+2112 16 34 28.653965 * 16 36 38.183456 16 36 53.384673 0.32 1634+213 21 18 56.44171 * 21 12 55.59502 21 12 08.41352 0.49 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.250 scan hours, 9.638 baseline hours above horizon. * J1641+2257 16 39 18.102927 * 16 41 25.227565 16 41 40.195915 0.24 1639+230 23 02 45.20241 * 22 57 04.03274 22 56 18.77175 0.43 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 2.867 baseline hours above horizon. * J1642+2523 16 40 36.555202 * 16 42 40.411845 16 42 55.070604 0.32 1640+254 25 28 43.57693 * 25 23 07.68189 25 22 22.98514 0.55 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.167 scan hours, 5.537 baseline hours above horizon. * J1644+1813 16 42 39.489851 * 16 44 52.432452 16 45 07.953357 0.84 1642+183 18 18 44.38577 * 18 13 17.23767 18 12 33.20535 1.82 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.139 scan hours, 3.457 baseline hours above horizon. The solar corona can cause unstable phases for sources too close to the Sun. SCHED provides warnings at individual scans for distances less than 10 degrees. The distance from the Sun to each source in this schedule is: Source Sun distance (deg) J1159-2148 115.1 J1159-2228 115.1 J1212-2221 118.0 J1215-1731 117.5 J1218-0119 112.6 J1222+0413 111.1 J1224+0330 112.0 3C273B 113.6 J1636+2112 136.5 J1641+2257 134.8 J1642+2523 132.4 J1644+1813 139.5 Barry Clark estimates from predictions by Ketan Desai of IPM scattering sizes that the Sun will cause amplitude reductions on the longest VLBA baselines at a solar distance of 60deg F^(-0.6) where F is in GHz. For common VLBI bands, this is: 327 MHz 117. deg 610 MHz 81. deg 1.6 GHz 45. deg 2.3 GHz 36. deg 5.0 GHz 23. deg 8.4 GHz 17. deg 15.0 GHz 12. deg 22.0 GHz 9. deg 43.0 GHz 6. deg