COVER INFORMATION Station: HART (Code Hh ) Experiment: Tracing the Radio Outflows in RQ AGN from Pc- to Kpc-scales Exp. Code: EG131E Schedule Version: 1.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: Salmoli Ghosh Address: National Centre for Radio Astrophysics - TIFR S.P. Pune Univ. Campus, Ganeshkhind Pune India : 411007 Phone: (+91)020-25719000 EMAIL: salmoli.ghosh@gmail.com Fax: Phone during observation: (+91)8240982699/(+91)020-25719230 Observing mode: Phase-referencing continuum Notes: PCAL OFF Schedule for HART (Code Hh ) Page 2 Tracing the Radio Outflows in RQ AGN from Pc- to Kpc-scales UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Thu 30 May 2024 Day 151 --- Next scan frequencies: 1626.49 1626.49 1626.49 1626.49 1690.49 1690.49 1690.49 1690.49 Next BBC frequencies: 116.49 116.49 116.49 116.49 180.49 180.49 180.49 180.49 Next scan bandwidths: 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 13 00 00 4C39.25 07 24 53 19.0 25.0 -2.1 0.0 0 0 13 00 00 13 05 00 --- 07 29 53 19.5 24.1 -2.0 0.0 300 39 13 00 01 16 45 00 4C39.25 11 10 30 20.9 339.0 1.7 0.0 13175 39 16 45 00 16 53 00 --- 11 18 31 20.3 337.5 1.8 0.0 480 100 16 45 01 16 55 00 3C286 11 20 31 25.5 31.3 -2.2 0.0 -28 100 16 55 00 16 58 00 --- 11 23 32 25.8 30.7 -2.1 0.0 152 124 16 55 01 ---------- source change ---------- 17 00 00 J1225+1253 11 25 32 48.6 22.8 -1.0 0.0 58 124 17 00 00 17 01 30 =M84 11 27 02 48.8 22.2 -1.0 0.0 90 135 17 00 01 17 01 30 NGC4388 11 27 02 48.9 22.6 -1.0 0.0 -24 135 No stop 17 05 00 --- 11 30 33 49.2 21.4 -0.9 0.0 186 162 17 01 31 17 05 30 J1225+1253 11 31 03 49.1 20.8 -0.9 0.0 6 162 17 05 30 17 06 30 =M84 11 32 03 49.2 20.5 -0.9 0.0 60 170 17 05 31 17 06 30 NGC4388 11 32 03 49.3 20.8 -0.9 0.0 -24 170 No stop 17 10 00 --- 11 35 34 49.6 19.6 -0.9 0.0 186 197 17 06 31 17 10 00 J1225+1253 11 35 34 49.4 19.2 -0.8 0.0 -24 197 No stop 17 11 30 =M84 11 37 04 49.5 18.7 -0.8 0.0 66 209 17 10 01 17 11 30 NGC4388 11 37 04 49.7 19.1 -0.8 0.0 -24 209 No stop 17 15 00 --- 11 40 34 50.0 17.8 -0.8 0.0 186 236 17 11 31 17 15 30 J1225+1253 11 41 05 49.8 17.2 -0.8 0.0 6 236 17 15 30 17 16 30 =M84 11 42 05 49.9 16.9 -0.7 0.0 60 243 17 15 31 17 16 30 NGC4388 11 42 05 50.1 17.2 -0.7 0.0 -24 243 No stop 17 20 00 --- 11 45 35 50.3 15.9 -0.7 0.0 186 271 17 16 31 17 20 00 J1225+1253 11 45 35 50.1 15.6 -0.7 0.0 -24 271 No stop 17 21 30 =M84 11 47 06 50.2 15.0 -0.7 0.0 66 282 17 20 01 17 21 30 NGC4388 11 47 06 50.4 15.4 -0.7 0.0 -24 282 No stop 17 25 00 --- 11 50 36 50.6 14.1 -0.6 0.0 186 309 17 21 31 Schedule for HART (Code Hh ) Page 3 Tracing the Radio Outflows in RQ AGN from Pc- to Kpc-scales UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Thu 30 May 2024 Day 151 --- 17 25 30 J1225+1253 11 51 06 50.4 13.5 -0.6 0.0 6 309 17 25 30 17 26 30 =M84 11 52 06 50.5 13.2 -0.6 0.0 60 317 17 25 31 17 26 30 NGC4388 11 52 06 50.7 13.5 -0.6 0.0 -24 317 No stop 17 30 00 --- 11 55 37 50.8 12.2 -0.5 0.0 186 344 17 26 31 17 30 00 J1225+1253 11 55 37 50.6 11.9 -0.5 0.0 -24 344 No stop 17 31 30 =M84 11 57 07 50.7 11.3 -0.5 0.0 66 356 17 30 01 17 31 30 NGC4388 11 57 07 50.9 11.6 -0.5 0.0 -24 356 No stop 17 35 00 --- 12 00 38 51.0 10.3 -0.4 0.0 186 383 17 31 31 17 35 30 J1225+1253 12 01 08 50.9 9.8 -0.4 0.0 6 383 17 35 30 17 36 30 =M84 12 02 08 50.9 9.4 -0.4 0.0 60 390 17 35 31 17 36 30 NGC4388 12 02 08 51.1 9.7 -0.4 0.0 -24 390 No stop 17 40 00 --- 12 05 39 51.2 8.4 -0.4 0.0 186 417 17 36 31 17 40 00 J1225+1253 12 05 39 51.0 8.0 -0.3 0.0 -24 417 No stop 17 41 30 =M84 12 07 09 51.1 7.4 -0.3 0.0 66 429 17 40 01 17 41 30 NGC4388 12 07 09 51.3 7.8 -0.3 0.0 -24 429 No stop 17 45 00 --- 12 10 39 51.4 6.4 -0.3 0.0 186 456 17 41 31 17 45 30 J1225+1253 12 11 09 51.2 5.9 -0.3 0.0 6 456 17 45 30 17 46 30 =M84 12 12 10 51.2 5.5 -0.2 0.0 60 464 17 45 31 17 46 30 NGC4388 12 12 10 51.4 5.8 -0.2 0.0 -24 464 No stop 17 50 00 --- 12 15 40 51.5 4.5 -0.2 0.0 186 491 17 46 31 17 50 00 J1225+1253 12 15 40 51.3 4.1 -0.2 0.0 -24 491 No stop 17 51 30 =M84 12 17 10 51.3 3.6 -0.2 0.0 66 502 17 50 01 17 51 30 NGC4388 12 17 10 51.5 3.9 -0.2 0.0 -24 502 No stop 17 55 00 --- 12 20 41 51.6 2.5 -0.1 0.0 186 529 17 51 31 17 55 30 J1225+1253 12 21 11 51.3 2.0 -0.1 0.0 6 529 17 55 30 17 56 30 =M84 12 22 11 51.3 1.6 -0.1 0.0 60 537 17 55 31 17 56 30 NGC4388 12 22 11 51.6 1.9 -0.1 0.0 -24 537 No stop 18 00 00 --- 12 25 42 51.6 0.5 -0.0 0.0 186 564 17 56 31 18 00 00 J1225+1253 12 25 42 51.4 0.2 -0.0 0.0 -24 564 No stop 18 01 30 =M84 12 27 12 51.4 359.7 0.0 0.0 66 576 18 00 01 Schedule for HART (Code Hh ) Page 4 Tracing the Radio Outflows in RQ AGN from Pc- to Kpc-scales UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Thu 30 May 2024 Day 151 --- 18 01 30 NGC4388 12 27 12 51.6 359.9 0.0 0.0 -24 576 No stop 18 05 00 --- 12 30 43 51.6 358.6 0.1 0.0 186 603 18 01 31 18 05 30 J1225+1253 12 31 13 51.3 358.1 0.1 0.0 6 603 18 05 30 18 06 30 =M84 12 32 13 51.3 357.7 0.1 0.0 60 611 18 05 31 18 06 30 NGC4388 12 32 13 51.6 358.0 0.1 0.0 -24 611 No stop 18 10 00 --- 12 35 43 51.5 356.6 0.1 0.0 186 638 18 06 31 18 10 00 J1225+1253 12 35 43 51.3 356.3 0.2 0.0 -24 638 No stop 18 11 30 =M84 12 37 14 51.3 355.7 0.2 0.0 66 649 18 10 01 18 11 30 NGC4388 12 37 14 51.5 356.0 0.2 0.0 -24 649 No stop 18 15 00 --- 12 40 44 51.4 354.6 0.2 0.0 186 676 18 11 31 18 15 30 J1225+1253 12 41 14 51.2 354.2 0.2 0.0 6 676 18 15 30 18 16 30 =M84 12 42 15 51.2 353.8 0.3 0.0 60 684 18 15 31 18 16 30 NGC4388 12 42 15 51.4 354.0 0.3 0.0 -24 684 No stop 18 20 00 --- 12 45 45 51.3 352.7 0.3 0.0 186 711 18 16 31 18 20 00 J1225+1253 12 45 45 51.1 352.4 0.3 0.0 -24 711 No stop 18 21 30 =M84 12 47 15 51.0 351.9 0.3 0.0 66 723 18 20 01 18 21 30 NGC4388 12 47 15 51.3 352.1 0.3 0.0 -24 723 No stop 18 25 00 --- 12 50 46 51.2 350.7 0.4 0.0 186 750 18 21 31 18 25 30 J1225+1253 12 51 16 50.9 350.3 0.4 0.0 6 750 18 25 30 18 26 30 =M84 12 52 16 50.8 349.9 0.4 0.0 60 757 18 25 31 18 26 30 NGC4388 12 52 16 51.1 350.2 0.4 0.0 -24 757 No stop 18 30 00 --- 12 55 47 51.0 348.8 0.5 0.0 186 785 18 26 31 18 30 00 J1225+1253 12 55 47 50.7 348.6 0.5 0.0 -24 785 No stop 18 31 30 =M84 12 57 17 50.6 348.0 0.5 0.0 66 796 18 30 01 18 31 30 NGC4388 12 57 17 50.9 348.2 0.5 0.0 -24 796 No stop 18 35 00 --- 13 00 48 50.7 346.9 0.6 0.0 186 823 18 31 31 18 35 30 J1225+1253 13 01 18 50.4 346.5 0.6 0.0 6 823 18 35 30 18 36 30 =M84 13 02 18 50.4 346.2 0.6 0.0 60 831 18 35 31 18 36 30 NGC4388 13 02 18 50.6 346.4 0.6 0.0 -24 831 No stop 18 40 00 --- 13 05 48 50.4 345.0 0.6 0.0 186 858 18 36 31 Schedule for HART (Code Hh ) Page 5 Tracing the Radio Outflows in RQ AGN from Pc- to Kpc-scales UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Thu 30 May 2024 Day 151 --- 18 40 00 J1225+1253 13 05 48 50.2 344.9 0.7 0.0 -24 858 No stop 18 41 30 =M84 13 07 19 50.1 344.3 0.7 0.0 66 870 18 40 01 18 41 30 NGC4388 13 07 19 50.4 344.5 0.7 0.0 -24 870 No stop 18 45 00 --- 13 10 49 50.1 343.2 0.7 0.0 186 897 18 41 31 18 45 30 J1225+1253 13 11 19 49.8 342.8 0.8 0.0 6 897 18 45 30 18 46 30 =M84 13 12 19 49.8 342.5 0.8 0.0 60 904 18 45 31 18 46 30 NGC4388 13 12 19 50.0 342.6 0.8 0.0 -24 904 No stop 18 50 00 --- 13 15 50 49.8 341.4 0.8 0.0 186 931 18 46 31 18 50 00 J1225+1253 13 15 50 49.5 341.2 0.8 0.0 -24 931 No stop 18 51 30 =M84 13 17 20 49.4 340.7 0.9 0.0 66 943 18 50 01 18 51 30 NGC4388 13 17 20 49.7 340.8 0.8 0.0 -24 943 No stop 18 55 00 --- 13 20 51 49.4 339.6 0.9 0.0 186 970 18 51 31 18 55 30 J1225+1253 13 21 21 49.1 339.2 0.9 0.0 6 970 18 55 30 18 56 30 =M84 13 22 21 49.0 338.9 0.9 0.0 60 978 18 55 31 18 56 30 NGC4388 13 22 21 49.3 339.0 0.9 0.0 -24 978 No stop 19 00 00 --- 13 25 52 49.0 337.8 1.0 0.0 186 1005 18 56 31 19 00 00 J1225+1253 13 25 52 48.7 337.7 1.0 0.0 -24 1005 No stop 19 01 30 =M84 13 27 22 48.6 337.2 1.0 0.0 66 1016 19 00 01 19 01 30 NGC4388 13 27 22 48.9 337.3 1.0 0.0 -24 1016 No stop 19 05 00 --- 13 30 53 48.6 336.1 1.1 0.0 186 1043 19 01 31 19 05 30 J1225+1253 13 31 23 48.2 335.8 1.1 0.0 6 1043 19 05 30 19 06 30 =M84 13 32 23 48.1 335.4 1.1 0.0 60 1051 19 05 31 19 06 30 NGC4388 13 32 23 48.4 335.6 1.1 0.0 -24 1051 No stop 19 10 00 --- 13 35 53 48.1 334.4 1.1 0.0 186 1078 19 06 31 19 10 00 J1225+1253 13 35 53 47.8 334.3 1.2 0.0 -24 1078 No stop 19 11 30 =M84 13 37 24 47.7 333.8 1.2 0.0 66 1090 19 10 01 19 11 30 NGC4388 13 37 24 47.9 333.9 1.2 0.0 -24 1090 No stop 19 15 00 --- 13 40 54 47.6 332.7 1.2 0.0 186 1117 19 11 31 19 15 30 J1225+1253 13 41 24 47.3 332.5 1.3 0.0 6 1117 19 15 30 19 16 30 =M84 13 42 24 47.1 332.1 1.3 0.0 60 1125 19 15 31 Schedule for HART (Code Hh ) Page 6 Tracing the Radio Outflows in RQ AGN from Pc- to Kpc-scales UP: D => Below limits; H => Below horizon mask; W => still slewing at end; blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Disk: GBytes recorded to this point. TPStart: Recording start time. Frequencies are LO sum (band edge). SYNC: Time correlator is expected to sync up. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Disk TPStart Stop UT LST EL AZ HA UP ParA Dwell GBytes SYNC ---------------------------------------------------------------------------------------- --- Thu 30 May 2024 Day 151 --- 19 16 30 NGC4388 13 42 24 47.4 332.2 1.3 0.0 -24 1125 No stop 19 20 00 --- 13 45 55 47.1 331.1 1.3 0.0 186 1152 19 16 31 19 20 00 J1225+1253 13 45 55 46.8 331.0 1.3 0.0 -24 1152 No stop 19 21 30 =M84 13 47 25 46.6 330.5 1.4 0.0 66 1163 19 20 01 19 21 30 NGC4388 13 47 25 46.9 330.6 1.3 0.0 -24 1163 No stop 19 25 00 --- 13 50 56 46.5 329.5 1.4 0.0 186 1190 19 21 31 19 25 30 J1225+1253 13 51 26 46.2 329.3 1.4 0.0 6 1190 19 25 30 19 26 30 =M84 13 52 26 46.0 329.0 1.4 0.0 60 1198 19 25 31 19 26 30 NGC4388 13 52 26 46.3 329.0 1.4 0.0 -24 1198 No stop 19 30 00 --- 13 55 57 45.9 327.9 1.5 0.0 186 1225 19 26 31 19 30 00 J1225+1253 13 55 57 45.6 327.9 1.5 0.0 -24 1225 No stop 19 31 30 =M84 13 57 27 45.4 327.4 1.5 0.0 66 1237 19 30 01 19 31 30 NGC4388 13 57 27 45.7 327.5 1.5 0.0 -24 1237 No stop 19 35 00 --- 14 00 57 45.3 326.4 1.6 0.0 186 1264 19 31 31 19 35 30 J1225+1253 14 01 28 45.0 326.2 1.6 0.0 6 1264 19 35 30 19 36 30 =M84 14 02 28 44.8 325.9 1.6 0.0 60 1271 19 35 31 19 36 30 NGC4388 14 02 28 45.1 326.0 1.6 0.0 -24 1271 No stop 19 40 00 --- 14 05 58 44.7 324.9 1.6 0.0 186 1298 19 36 31 19 40 00 J1225+1253 14 05 58 44.4 324.9 1.7 0.0 -24 1298 No stop 19 41 30 =M84 14 07 29 44.2 324.5 1.7 0.0 66 1310 19 40 01 23 52 00 3C345 18 18 40 20.7 340.7 1.6 0.0 14875 1310 23 52 00 23 59 59 --- 18 26 41 20.1 339.2 1.7 0.0 479 1372 23 52 01 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess224.L1024 Matching groups in /home/guest/rmc/SCHED/sched11.6/catalogs/freq_RDBE.dat: hh18cm Values confirmed by E-mail Jonathan Quick 20140219 (CR) ****** Only 122.49 of 256.00 MHz total bandwidth is within the IFs in the setup file before any FREQ or DOPPLER shifts. Setup group: 5 Station: HART Total bit rate: 1024 Format: VDIF Bits per sample: 2 Sample rate: 64.000 Number of channels: 8 DBE type: DBBC_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 Net SB= L L U U L L U U IF SB = U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 9 1 9 2 10 2 10 BBC SB= L L U U L L U U IF = A1 C1 A1 C1 A1 C1 A1 C1 The following frequency sets based on these setups were used. Frequency Set: 8 Setup file default. Used with PCAL = off LO sum= 1626.49 1626.49 1626.49 1626.49 1690.49 1690.49 1690.49 1690.49 BBC fr= 116.49 116.49 116.49 116.49 180.49 180.49 180.49 180.49 Bandwd= 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 Matching frequency sets: 8 Track assignments are: track1= 1, 2, 3, 4, 5, 6, 7, 8 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * MRK9 07 32 42.186828 * 07 36 57.020000 07 38 59.084199 0.00 58 52 56.23686 * 58 46 13.40000 58 43 09.45480 0.00 From catalog imbedded in main SCHED input file. * NGC4388 12 23 14.667279 * 12 25 46.810000 12 27 01.498572 0.00 12 56 19.70042 * 12 39 43.40000 12 31 39.24087 0.00 From catalog imbedded in main SCHED input file. * NGC3516 11 03 22.809672 * 11 06 47.460000 11 08 27.869385 0.00 72 50 20.39872 * 72 34 07.20000 72 26 32.40388 0.00 From catalog imbedded in main SCHED input file. UG03927 07 33 11.618492 * 07 37 30.086987 07 39 33.864594 0.42 * J0737+5941 59 47 48.11460 * 59 41 03.19422 59 37 58.33032 0.54 0733+597 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 51 observations. * 4C39.25 09 23 55.319216 * 09 27 03.013937 09 28 33.839979 0.31 J0927+3902 39 15 23.56644 * 39 02 20.85185 38 56 11.89601 0.16 0923+392 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc J0927+39 GSFC 2016a X/S astro solution, 250526 observations. 1104+728 11 04 17.979109 * 11 07 41.722541 11 09 21.716986 0.11 * J1107+7232 72 48 50.14178 * 72 32 36.00502 72 25 00.73332 0.03 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 1253 observations. M84 12 22 31.582018 * 12 25 03.743334 12 26 18.438568 0.04 * J1225+1253 13 09 49.76866 * 12 53 13.13927 12 45 08.91099 0.11 1222+131 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 667 observations. * 3C286 13 28 49.657769 * 13 31 08.288061 13 32 16.993584 0.17 J1331+3030 30 45 58.64066 * 30 30 32.95930 30 23 05.63249 0.16 1328+307 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc J1331+30 GSFC 2016a X/S astro solution, 269 observations. * 3C345 16 41 17.606229 * 16 42 58.809967 16 43 49.928936 0.79 J1642+3948 39 54 10.81492 * 39 48 36.99399 39 45 46.70940 0.59 1641+399 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc J1642+39 GSFC 2016a X/S astro solution, 53724 observations. SOURCE SCAN SUMMARY FOR SOURCES LISTED ABOVE Scan hours are for recording scans only. Baseline hours are only counted for scans above horizon at both ends. Source Setup file Frequency sets Observing hours (duplicates not shown) Scan Baseline MRK9 sess224.L1024 1 2 3 4 5 6 7 9 10 2.450 157.043 NGC4388 sess224.L1024 1 2 3 4 5 6 7 8 9 10 1.867 158.603 NGC3516 sess224.L1024 1 2 3 4 5 6 7 9 10 2.417 179.474 J0737+5941 sess224.L1024 1 2 3 4 5 6 7 9 10 0.925 49.872 4C39.25 sess224.L1024 1 2 3 4 5 6 7 8 9 10 0.400 23.533 J1107+7232 sess224.L1024 1 2 3 4 5 6 7 9 10 1.042 66.712 J1225+1253 sess224.L1024 1 2 3 4 5 6 7 8 9 10 0.692 52.706 3C286 sess224.L1024 1 2 3 4 5 6 7 8 9 10 0.050 1.295 3C345 sess224.L1024 2 3 4 5 6 7 8 9 10 0.133 6.687 EFFECT OF SOLAR CORONA 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) MRK9 49.4 NGC4388 110.6 NGC3516 71.8 J0737+5941 49.9 4C39.25 64.3 J1107+7232 71.9 J1225+1253 110.4 3C286 112.1 3C345 118.3 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