COVER INFORMATION Station: TORUN (Code Tr ) 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 TORUN (Code Tr ) 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: 662.01 662.01 654.01 654.01 646.01 646.01 638.01 638.01 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 16 00 00 3C273B 09 59 08 30.3 135.1 -2.5 -25.1 0 1 1 0 16 00 00 16 05 20 --- 10 04 29 30.8 136.6 -2.4 -24.4 320 F 1 0 16 08 20 J1215-1731 10 07 30 14.1 148.5 -2.1 -19.2 88 1 1 0 16 08 20 16 09 20 =1213-172 10 08 30 14.2 148.7 -2.1 -19.1 60 F 1 0 16 09 20 J1212-2221 10 08 30 9.9 151.1 -2.1 -18.3 -45 1 1 0 16 09 20 16 11 00 =1209-220 10 10 10 10.0 151.5 -2.0 -18.1 55 F 1 0 16 11 00 J1215-1731 10 10 10 14.3 149.1 -2.1 -18.9 -45 1 1 0 16 11 00 16 12 40 =1213-172 10 11 51 14.4 149.5 -2.1 -18.7 55 F 1 0 16 12 40 J1212-2221 10 11 51 10.1 151.9 -2.0 -17.8 -45 1 1 0 16 12 40 16 14 20 =1209-220 10 13 31 10.2 152.3 -2.0 -17.6 55 F 1 0 16 14 20 J1215-1731 10 13 31 14.6 149.9 -2.0 -18.4 -45 1 1 0 16 14 20 16 16 00 =1213-172 10 15 11 14.7 150.3 -2.0 -18.2 55 F 1 0 16 16 00 J1159-2148 10 15 11 11.7 155.2 -1.7 -15.7 -40 1 1 0 16 16 00 16 18 00 =1157-215 10 17 11 11.8 155.7 -1.7 -15.4 80 F 1 0 16 18 00 J1215-1731 10 17 11 14.8 150.7 -2.0 -17.9 -40 1 1 0 16 18 00 16 20 00 =1213-172 10 19 12 15.0 151.2 -1.9 -17.7 80 F 1 0 16 20 00 J1159-2148 10 19 12 11.9 156.1 -1.7 -15.2 -40 1 1 0 16 20 00 16 22 00 =1157-215 10 21 12 12.0 156.6 -1.6 -14.9 80 F 1 0 16 22 00 J1215-1731 10 21 12 15.1 151.7 -1.9 -17.4 -40 1 1 0 16 22 00 16 24 00 =1213-172 10 23 12 15.3 152.1 -1.9 -17.1 80 F 1 0 16 25 00 J1159-2148 10 24 13 12.2 157.3 -1.6 -14.5 20 1 1 0 16 25 00 16 26 00 =1157-215 10 25 13 12.3 157.5 -1.6 -14.3 60 F 1 0 16 26 00 J1212-2221 10 25 13 11.0 154.9 -1.8 -16.0 -35 1 1 0 16 26 00 16 27 40 =1209-220 10 26 53 11.1 155.3 -1.8 -15.8 65 F 1 0 Schedule for TORUN (Code Tr ) 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 --- 16 27 40 J1159-2148 10 26 53 12.4 157.9 -1.6 -14.1 -35 1 1 0 16 27 40 16 29 20 =1157-215 10 28 33 12.5 158.3 -1.5 -13.8 65 F 1 0 16 29 20 J1212-2221 10 28 33 11.2 155.6 -1.7 -15.5 -35 1 1 0 16 29 20 16 31 00 =1209-220 10 30 14 11.3 156.0 -1.7 -15.3 65 F 1 0 16 31 00 J1159-2148 10 30 14 12.6 158.7 -1.5 -13.6 -35 1 1 0 16 31 00 16 32 40 =1157-215 10 31 54 12.6 159.1 -1.5 -13.4 65 F 1 0 16 32 40 J1212-2221 10 31 54 11.4 156.4 -1.7 -15.1 -35 1 1 0 16 32 40 16 34 20 =1209-220 10 33 34 11.5 156.8 -1.6 -14.8 65 F 1 0 16 34 20 J1159-2148 10 33 34 12.7 159.5 -1.4 -13.1 -35 1 1 0 16 34 20 16 36 00 =1157-215 10 35 14 12.8 159.8 -1.4 -12.9 65 F 1 0 16 36 00 J1159-2228 10 35 14 12.2 160.1 -1.4 -12.8 -29 1 1 0 16 36 00 16 37 40 =1156-221 10 36 55 12.3 160.5 -1.4 -12.5 71 F 1 0 16 37 40 J1159-2148 10 36 55 12.9 160.2 -1.4 -12.6 -29 1 1 0 16 37 40 16 39 20 =1157-215 10 38 35 13.0 160.6 -1.4 -12.4 71 F 1 0 16 39 20 J1159-2228 10 38 35 12.4 160.9 -1.3 -12.3 -29 1 1 0 16 39 20 16 41 00 =1156-221 10 40 15 12.5 161.3 -1.3 -12.0 71 F 1 0 16 41 00 J1159-2148 10 40 15 13.1 161.0 -1.3 -12.2 -29 1 1 0 16 41 00 16 42 40 =1157-215 10 41 55 13.2 161.4 -1.3 -11.9 71 F 1 0 16 42 40 J1159-2228 10 41 55 12.5 161.7 -1.3 -11.8 -29 1 1 0 16 42 40 16 44 20 =1156-221 10 43 36 12.6 162.1 -1.3 -11.5 71 F 1 0 16 44 20 J1159-2148 10 43 36 13.2 161.8 -1.3 -11.7 -29 1 1 0 16 44 20 16 46 00 =1157-215 10 45 16 13.3 162.2 -1.2 -11.4 71 F 1 0 16 47 40 3C273B 10 46 56 34.7 148.3 -1.7 -18.4 -9 1 1 0 16 47 40 16 55 40 --- 10 54 58 35.3 150.6 -1.6 -17.1 471 F 1 0 16 58 40 J1224+0330 10 57 58 37.2 152.3 -1.5 -16.3 144 1 1 0 16 58 40 16 59 40 =1222+037 10 58 58 37.3 152.6 -1.4 -16.1 60 F 1 0 16 59 40 J1222+0413 10 58 58 38.2 153.1 -1.4 -15.8 -31 1 1 0 16 59 40 17 01 20 =1219+044 11 00 38 38.3 153.6 -1.4 -15.5 69 F 1 0 17 01 20 J1224+0330 11 00 38 37.4 153.1 -1.4 -15.8 -31 1 1 0 17 01 20 17 03 00 =1222+037 11 02 19 37.5 153.6 -1.4 -15.5 69 F 1 0 Schedule for TORUN (Code Tr ) 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 03 00 J1222+0413 11 02 19 38.4 154.1 -1.3 -15.3 -31 1 1 0 17 03 00 17 04 40 =1219+044 11 03 59 38.5 154.6 -1.3 -15.0 69 F 1 0 17 04 40 J1224+0330 11 03 59 37.6 154.1 -1.4 -15.2 -31 1 1 0 17 04 40 17 06 20 =1222+037 11 05 39 37.8 154.6 -1.3 -15.0 69 F 1 0 17 06 20 J1222+0413 11 05 39 38.6 155.1 -1.3 -14.7 -31 1 1 0 17 06 20 17 08 00 =1219+044 11 07 20 38.7 155.6 -1.3 -14.4 69 F 1 0 17 08 00 J1224+0330 11 07 20 37.9 155.1 -1.3 -14.7 -31 1 1 0 17 08 00 17 09 40 =1222+037 11 09 00 38.0 155.6 -1.3 -14.4 69 F 1 0 17 09 40 J1218-0119 11 09 00 33.6 158.9 -1.2 -12.5 -45 1 1 0 17 09 40 17 11 20 =1216-010 11 10 40 33.7 159.4 -1.1 -12.2 55 F 1 0 17 11 20 J1224+0330 11 10 40 38.1 156.1 -1.2 -14.1 -45 1 1 0 17 11 20 17 13 00 =1222+037 11 12 20 38.2 156.6 -1.2 -13.8 55 F 1 0 17 13 00 J1218-0119 11 12 20 33.8 159.9 -1.1 -11.9 -45 1 1 0 17 13 00 17 14 40 =1216-010 11 14 01 33.9 160.4 -1.1 -11.7 55 F 1 0 17 14 40 J1224+0330 11 14 01 38.3 157.1 -1.2 -13.5 -45 1 1 0 17 14 40 17 16 20 =1222+037 11 15 41 38.4 157.7 -1.2 -13.2 55 F 1 0 17 20 40 J1636+2112 11 20 02 23.2 85.2 -5.3 -39.9 85 1 1 0 17 20 40 17 21 40 =1634+213 11 21 02 23.4 85.3 -5.3 -39.9 60 F 1 0 17 21 40 J1644+1813 11 21 02 19.8 85.8 -5.4 -39.1 -42 1 1 0 17 21 40 17 23 20 =1642+183 11 22 42 20.1 86.1 -5.4 -39.1 58 F 1 0 17 23 20 J1636+2112 11 22 42 23.6 85.7 -5.2 -40.0 -42 1 1 0 17 23 20 17 25 00 =1634+213 11 24 22 23.9 86.0 -5.2 -40.0 58 F 1 0 17 25 00 J1644+1813 11 24 22 20.3 86.4 -5.3 -39.1 -42 1 1 0 17 25 00 17 26 40 =1642+183 11 26 03 20.6 86.8 -5.3 -39.1 58 F 1 0 17 26 40 J1636+2112 11 26 03 24.1 86.3 -5.2 -40.0 -42 1 1 0 17 26 40 17 28 20 =1634+213 11 27 43 24.4 86.7 -5.2 -40.0 58 F 1 0 17 28 20 J1644+1813 11 27 43 20.8 87.1 -5.3 -39.1 -42 1 1 0 17 28 20 17 30 00 =1642+183 11 29 23 21.1 87.4 -5.3 -39.2 58 F 1 0 17 30 00 J1636+2112 11 29 23 24.6 87.0 -5.1 -40.0 -42 1 1 0 17 30 00 17 31 40 =1634+213 11 31 03 24.9 87.3 -5.1 -40.0 58 F 1 0 Schedule for TORUN (Code Tr ) Page 5 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 31 40 J1641+2257 11 31 03 25.5 85.1 -5.2 -40.5 -33 1 1 0 17 31 40 17 33 20 =1639+230 11 32 44 25.7 85.5 -5.1 -40.5 67 F 1 0 17 33 20 J1636+2112 11 32 44 25.1 87.6 -5.1 -40.1 -33 1 1 0 17 33 20 17 35 00 =1634+213 11 34 24 25.4 88.0 -5.0 -40.1 67 F 1 0 17 35 00 J1641+2257 11 34 24 26.0 85.8 -5.1 -40.6 -33 1 1 0 17 35 00 17 36 40 =1639+230 11 36 04 26.2 86.1 -5.1 -40.6 67 F 1 0 17 36 40 J1636+2112 11 36 04 25.6 88.3 -5.0 -40.1 -33 1 1 0 17 36 40 17 38 20 =1634+213 11 37 45 25.9 88.6 -5.0 -40.1 67 F 1 0 17 38 20 J1641+2257 11 37 45 26.5 86.4 -5.1 -40.6 -33 1 1 0 17 38 20 17 40 00 =1639+230 11 39 25 26.7 86.8 -5.0 -40.6 67 F 1 0 17 41 00 J1636+2112 11 40 25 26.3 89.2 -4.9 -40.1 26 1 1 0 17 41 00 17 41 40 =1634+213 11 41 05 26.4 89.3 -4.9 -40.1 40 F 1 0 17 41 40 J1642+2523 11 41 05 28.6 85.0 -5.0 -41.5 -38 1 1 0 17 41 40 17 43 20 =1640+254 11 42 45 28.9 85.4 -5.0 -41.5 62 F 1 0 17 43 20 J1636+2112 11 42 45 26.6 89.6 -4.9 -40.1 -38 1 1 0 17 43 20 17 45 00 =1634+213 11 44 26 26.9 90.0 -4.9 -40.1 62 F 1 0 17 45 00 J1642+2523 11 44 26 29.1 85.7 -5.0 -41.5 -38 1 1 0 17 45 00 17 46 40 =1640+254 11 46 06 29.4 86.0 -4.9 -41.5 62 F 1 0 17 46 40 J1636+2112 11 46 06 27.1 90.3 -4.8 -40.1 -39 1 1 0 17 46 40 17 48 20 =1634+213 11 47 46 27.4 90.6 -4.8 -40.1 61 F 1 0 17 48 20 J1642+2523 11 47 46 29.6 86.3 -4.9 -41.5 -39 1 1 0 17 48 20 17 50 00 =1640+254 11 49 26 29.9 86.7 -4.9 -41.6 61 F 1 0 17 50 00 J1636+2112 11 49 26 27.6 91.0 -4.8 -40.1 -39 1 1 0 17 50 00 17 51 40 =1634+213 11 51 07 27.9 91.3 -4.8 -40.1 61 F 1 0 17 51 40 J1642+2523 11 51 07 30.1 87.0 -4.9 -41.6 -39 1 1 0 17 51 40 17 53 20 =1640+254 11 52 47 30.4 87.3 -4.8 -41.6 61 F 1 0 17 53 20 J1644+1813 11 52 47 24.6 92.1 -4.9 -39.2 -51 1 1 0 17 53 20 17 55 00 =1642+183 11 54 27 24.8 92.4 -4.8 -39.2 49 F 1 0 17 55 00 J1642+2523 11 54 27 30.6 87.6 -4.8 -41.6 -51 1 1 0 17 55 00 17 56 40 =1640+254 11 56 08 30.9 88.0 -4.8 -41.6 49 F 1 0 Schedule for TORUN (Code Tr ) Page 6 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 56 40 J1644+1813 11 56 08 25.1 92.8 -4.8 -39.2 -51 1 1 0 17 56 40 17 58 20 =1642+183 11 57 48 25.3 93.1 -4.8 -39.1 49 F 1 0 17 58 20 J1642+2523 11 57 48 31.1 88.3 -4.8 -41.6 -51 1 1 0 17 58 20 18 00 00 =1640+254 11 59 28 31.4 88.6 -4.7 -41.6 49 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 tr18cm in /aps3/sched/catalogs/freq.dat E-mail Borkowski 12Mar98, preferred alternative Setup group: 6 Station: TORUN 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= 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 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: 6 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= 662.01 662.01 654.01 654.01 646.01 646.01 638.01 638.01 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