COVER INFORMATION Station: SHANGHAI (Code Sh ) Experiment: Disc-dirven jets in quasars Exp. Code: EM084C Schedule Version: 1.00 Processed by SCHED version: 9.40 Release Jan. 13, 2011. PI: Martinez-Sansigre Address: Oxford University Keble Road,Oxford OX1 3RH United Kingdom Phone: +44 1865 273435 EMAIL: hrk@astro.ox.ac.uk Fax: +44 1865 273390 Phone during observation: +44 1865 273435 Observing mode: 1 Gbit at 18cm Notes: Schedule by H-R. Kloeckner >>> THANK YOU <<< Schedule for SHANGHAI (Code Sh ) Page 2 Disc-dirven jets in quasars 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 ---------------------------------------------------------------------------------------- --- Wed 2 Nov 2011 Day 306 --- Next scan frequencies: 1610.49 1610.49 1610.49 1610.49 1642.49 1642.49 1642.49 1642.49 1674.49 1674.49 1674.49 1674.49 1706.49 1706.49 1706.49 1706.49 Next BBC frequencies: 689.51 689.51 689.51 689.51 657.51 657.51 657.51 657.51 625.51 625.51 625.51 625.51 593.51 593.51 593.51 593.51 Next scan bandwidths: 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 03 30 00 J0927+3902 14 19 04 31.4 -60.5 4.9 73.5 0 0 03 30 00 03 35 00 =0923+392 14 24 04 30.5 -60.2 4.9 72.9 300 39 03 30 01 03 36 00 J0927+3902 14 25 05 30.3 -60.1 5.0 72.8 58 39 03 36 00 03 46 00 =0923+392 14 35 06 28.5 -59.4 5.1 71.5 600 116 03 36 01 03 47 00 J1208+5441 14 36 06 55.0 -37.0 2.4 117.1 12 116 03 47 00 03 50 00 =1206+549 14 39 07 54.6 -37.4 2.5 116.2 180 139 03 47 01 03 50 00 4C5324 14 39 07 55.9 -38.3 2.4 116.7 -6 139 No stop 04 00 00 --- 14 49 08 54.6 -39.4 2.6 113.8 594 217 03 50 01 04 01 00 J1208+5441 14 50 09 53.1 -38.5 2.7 113.0 54 217 04 01 00 04 04 00 =1206+549 14 53 09 52.7 -38.8 2.7 112.2 180 240 04 01 01 04 04 00 4C5324 14 53 09 54.0 -39.8 2.6 112.6 -6 240 No stop 04 14 00 --- 15 03 11 52.6 -40.7 2.8 109.9 594 317 04 04 01 04 15 00 J1208+5441 15 04 11 51.2 -39.7 2.9 109.2 54 317 04 15 00 04 18 00 =1206+549 15 07 11 50.8 -39.9 3.0 108.4 180 341 04 15 01 04 18 00 4C5324 15 07 11 52.1 -41.1 2.9 108.8 -6 341 No stop 04 28 00 --- 15 17 13 50.7 -41.8 3.0 106.3 594 418 04 18 01 04 29 00 J1208+5441 15 18 13 49.3 -40.6 3.1 105.6 54 418 04 29 00 04 32 00 =1206+549 15 21 14 48.9 -40.8 3.2 104.9 180 441 04 29 01 04 33 00 J1253+5301 15 22 14 55.4 -39.9 2.5 114.3 45 441 04 33 00 04 36 00 =1250+532 15 25 14 55.0 -40.2 2.5 113.5 180 464 04 33 01 04 36 00 DSS1251 15 25 14 54.2 -38.1 2.6 114.9 -6 464 No stop 04 46 00 --- 15 35 16 52.9 -39.1 2.7 112.1 594 542 04 36 01 Schedule for SHANGHAI (Code Sh ) Page 3 Disc-dirven jets in quasars 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 ---------------------------------------------------------------------------------------- --- Wed 2 Nov 2011 Day 306 --- 04 47 00 J1253+5301 15 36 16 53.5 -41.3 2.7 110.4 54 542 04 47 00 04 50 00 =1250+532 15 39 17 53.1 -41.5 2.8 109.6 180 565 04 47 01 04 50 00 DSS1251 15 39 17 52.3 -39.4 2.8 111.0 -6 565 No stop 05 00 00 --- 15 49 18 51.0 -40.2 3.0 108.3 594 643 04 50 01 05 01 00 J1253+5301 15 50 18 51.5 -42.4 2.9 106.7 54 643 05 01 00 05 04 00 =1250+532 15 53 19 51.0 -42.6 3.0 106.0 180 666 05 01 01 05 05 00 J1329+5009 15 54 19 57.1 -44.2 2.4 111.5 46 666 05 05 00 05 08 00 =1327+504 15 57 20 56.6 -44.5 2.5 110.6 180 689 05 05 01 05 08 00 DSS1329 15 57 20 57.4 -48.2 2.5 107.5 -8 689 No stop 05 18 00 --- 16 07 21 55.7 -49.1 2.6 105.0 592 766 05 08 01 05 19 00 J1329+5009 16 08 21 55.0 -45.6 2.6 107.7 52 766 05 19 00 05 22 00 =1327+504 16 11 22 54.5 -45.8 2.7 106.9 180 790 05 19 01 05 22 00 DSS1329 16 11 22 55.1 -49.4 2.7 104.0 -8 790 No stop 05 32 00 --- 16 21 24 53.5 -50.0 2.9 101.6 592 867 05 22 01 05 33 00 J1329+5009 16 22 24 52.8 -46.6 2.9 104.1 53 867 05 33 00 05 36 00 =1327+504 16 25 24 52.3 -46.8 2.9 103.4 180 890 05 33 01 05 37 10 J1405+4056 16 26 34 60.1 -61.0 2.3 97.8 52 890 05 37 10 05 40 10 =1403+411 16 29 35 59.5 -61.2 2.4 97.1 180 913 05 37 11 05 40 10 DSS1418 16 29 35 61.8 -58.6 2.2 101.5 -8 913 No stop 05 50 10 --- 16 39 37 59.9 -59.3 2.4 99.2 592 991 05 40 11 05 51 10 J1405+4056 16 40 37 57.5 -61.6 2.6 95.0 52 991 05 51 10 05 54 10 =1403+411 16 43 37 56.9 -61.7 2.6 94.4 180 1014 05 51 11 05 54 10 DSS1418 16 43 37 59.2 -59.5 2.4 98.4 -8 1014 No stop 06 04 10 --- 16 53 39 57.3 -60.0 2.6 96.3 592 1092 05 54 11 06 05 10 J1405+4056 16 54 39 54.8 -61.9 2.8 92.4 52 1092 06 05 10 06 08 10 =1403+411 16 57 40 54.2 -61.9 2.9 91.9 180 1115 06 05 11 06 10 10 J1208+5441 16 59 40 34.7 -42.2 4.8 83.7 84 1115 06 10 10 06 13 10 =1206+549 17 02 40 34.3 -42.2 4.9 83.2 180 1138 06 10 11 06 13 10 4C5324 17 02 40 35.1 -43.6 4.8 83.7 -5 1138 No stop 06 23 10 --- 17 12 42 33.7 -43.4 4.9 81.8 595 1215 06 13 11 Schedule for SHANGHAI (Code Sh ) Page 4 Disc-dirven jets in quasars 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 ---------------------------------------------------------------------------------------- --- Wed 2 Nov 2011 Day 306 --- 06 24 10 J1208+5441 17 13 42 32.7 -41.9 5.1 81.1 55 1215 06 24 10 06 27 10 =1206+549 17 16 43 32.3 -41.8 5.1 80.5 180 1239 06 24 11 06 27 10 4C5324 17 16 43 33.1 -43.3 5.0 81.0 -5 1239 No stop 06 37 10 --- 17 26 44 31.6 -43.0 5.2 79.2 595 1316 06 27 11 06 38 10 J1208+5441 17 27 44 30.7 -41.5 5.3 78.4 55 1316 06 38 10 06 41 10 =1206+549 17 30 45 30.3 -41.4 5.4 77.9 180 1339 06 38 11 06 42 10 J1253+5301 17 31 45 36.4 -44.5 4.6 84.9 46 1339 06 42 10 06 45 10 =1250+532 17 34 46 35.9 -44.4 4.7 84.3 180 1362 06 42 11 06 45 10 DSS1251 17 34 46 35.8 -42.6 4.7 85.0 -6 1362 No stop 06 55 10 --- 17 44 47 34.4 -42.4 4.9 83.1 594 1440 06 45 11 06 56 10 J1253+5301 17 45 47 34.3 -44.2 4.9 82.2 54 1440 06 56 10 06 59 10 =1250+532 17 48 48 33.8 -44.1 4.9 81.7 180 1463 06 56 11 06 59 10 DSS1251 17 48 48 33.8 -42.4 4.9 82.3 -6 1463 No stop 07 09 10 --- 17 58 50 32.3 -42.1 5.1 80.5 594 1541 06 59 11 07 10 10 J1253+5301 17 59 50 32.2 -43.8 5.1 79.7 54 1541 07 10 10 07 13 10 =1250+532 18 02 50 31.7 -43.7 5.2 79.1 180 1564 07 10 11 07 14 10 J1329+5009 18 03 50 36.7 -48.1 4.6 83.5 47 1564 07 14 10 07 17 10 =1327+504 18 06 51 36.2 -48.0 4.6 82.9 180 1587 07 14 11 07 17 10 DSS1329 18 06 51 35.9 -50.7 4.6 81.4 -7 1587 No stop 07 27 10 --- 18 16 53 34.2 -50.3 4.8 79.7 593 1664 07 17 11 07 28 10 J1329+5009 18 17 53 34.4 -47.7 4.8 81.0 53 1664 07 28 10 07 31 10 =1327+504 18 20 53 33.9 -47.6 4.9 80.5 180 1688 07 28 11 07 31 10 DSS1329 18 20 53 33.6 -50.2 4.9 79.1 -7 1688 No stop 07 41 10 --- 18 30 55 31.9 -49.8 5.0 77.4 593 1765 07 31 11 07 42 10 J1329+5009 18 31 55 32.2 -47.2 5.0 78.6 54 1765 07 42 10 07 45 10 =1327+504 18 34 55 31.7 -47.1 5.1 78.0 180 1788 07 42 11 07 46 10 J1405+4056 18 35 56 35.8 -59.5 4.5 77.4 44 1788 07 46 10 07 49 10 =1403+411 18 38 56 35.2 -59.3 4.6 77.0 180 1811 07 46 11 07 49 10 DSS1418 18 38 56 37.8 -58.9 4.3 79.4 -8 1811 No stop 07 59 10 --- 18 48 58 36.0 -58.4 4.5 78.0 592 1889 07 49 11 Schedule for SHANGHAI (Code Sh ) Page 5 Disc-dirven jets in quasars 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 ---------------------------------------------------------------------------------------- --- Wed 2 Nov 2011 Day 306 --- 08 00 10 J1405+4056 18 49 58 33.2 -58.7 4.7 75.5 52 1889 08 00 10 08 03 10 =1403+411 18 52 58 32.7 -58.6 4.8 75.1 180 1912 08 00 11 08 03 10 DSS1418 18 52 58 35.2 -58.2 4.6 77.5 -8 1912 No stop 08 13 10 --- 19 03 00 33.4 -57.7 4.7 76.1 592 1990 08 03 11 08 14 10 J1405+4056 19 04 00 30.7 -57.9 5.0 73.7 52 1990 08 14 10 08 17 10 =1403+411 19 07 01 30.1 -57.7 5.0 73.3 180 2013 08 14 11 08 20 20 3C345 19 10 11 59.1 -63.4 2.4 94.7 137 2013 08 20 20 08 31 20 --- 19 21 13 57.0 -63.7 2.6 92.8 660 2098 08 20 21 08 32 20 J1405+4056 19 22 13 27.4 -56.7 5.3 71.3 7 2098 08 32 20 08 35 20 =1403+411 19 25 14 26.8 -56.5 5.3 70.9 180 2121 08 32 21 08 35 20 DSS1418 19 25 14 29.4 -56.4 5.1 73.1 -8 2121 No stop 08 45 20 --- 19 35 15 27.6 -55.8 5.3 71.7 592 2199 08 35 21 08 46 20 J1405+4056 19 36 16 24.9 -55.7 5.5 69.4 52 2199 08 46 20 08 49 20 =1403+411 19 39 16 24.4 -55.5 5.6 69.0 180 2222 08 46 21 08 49 20 DSS1418 19 39 16 26.9 -55.5 5.3 71.2 -8 2222 No stop 08 59 00 --- 19 48 58 25.2 -54.8 5.5 69.8 572 2297 08 49 21 09 00 00 J1405+4056 19 49 58 22.5 -54.7 5.7 67.6 52 2297 09 00 00 09 03 00 =1403+411 19 52 58 21.9 -54.5 5.8 67.2 180 2320 09 00 01 09 03 00 DSS1418 19 52 58 24.5 -54.6 5.6 69.3 -8 2320 No stop 09 12 40 --- 20 02 40 22.8 -53.8 5.7 68.0 572 2395 09 03 01 09 13 40 J1405+4056 20 03 40 20.1 -53.6 6.0 65.7 52 2395 09 13 40 09 16 40 =1403+411 20 06 40 19.6 -53.4 6.0 65.3 180 2418 09 13 41 09 17 40 J1329+5009 20 07 41 17.8 -41.6 6.6 62.5 44 2418 09 17 40 09 20 40 =1327+504 20 10 41 17.3 -41.4 6.7 62.0 180 2441 09 17 41 09 20 40 DSS1329 20 10 41 16.3 -43.4 6.7 61.4 -6 2441 No stop 09 30 40 --- 20 20 43 14.9 -42.5 6.9 59.8 594 2519 09 20 41 09 32 10 J1329+5009 20 22 13 15.7 -40.5 6.9 60.0 84 2519 09 32 10 09 35 10 =1327+504 20 25 14 15.3 -40.2 6.9 59.5 180 2542 09 32 11 09 35 10 DSS1329 20 25 14 14.2 -42.1 6.9 59.0 -6 2542 No stop 09 45 10 --- 20 35 15 12.8 -41.2 7.1 57.4 594 2619 09 35 11 Schedule for SHANGHAI (Code Sh ) Page 6 Disc-dirven jets in quasars 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 ---------------------------------------------------------------------------------------- --- Wed 2 Nov 2011 Day 306 --- 09 46 40 J1329+5009 20 36 45 13.7 -39.2 7.1 57.6 84 2619 09 46 40 09 49 40 =1327+504 20 39 46 13.3 -38.9 7.2 57.0 180 2642 09 46 41 09 49 40 DSS1329 20 39 46 12.2 -40.8 7.2 56.6 -6 2642 No stop 09 59 40 --- 20 49 48 10.8 -39.8 7.3 55.0 594 2720 09 49 41 10 01 30 J1329+5009 20 51 38 11.8 -37.9 7.4 55.0 104 2720 10 01 30 10 04 30 =1327+504 20 54 38 11.4 -37.6 7.4 54.5 180 2743 10 01 31 10 10 00 J1253+5301 21 00 09 8.2 -31.2 8.1 47.4 320 2743 10 10 00 10 13 00 =1250+532 21 03 10 7.8 -30.9 8.2 46.9 180 2766 10 10 01 10 13 00 DSS1251 21 03 10 8.6 -29.7 8.2 46.8 -5 2766 No stop 10 23 00 --- 21 13 11 7.6 -28.7 8.4 44.9 595 2844 10 13 01 10 24 00 J1253+5301 21 14 12 6.6 -29.7 8.3 44.8 54 2844 10 24 00 10 27 00 =1250+532 21 17 12 6.3 -29.4 8.4 44.3 180 2867 10 24 01 10 27 00 DSS1251 21 17 12 7.2 -28.2 8.4 44.1 -6 2867 No stop 10 37 00 --- 21 27 14 6.2 -27.2 8.6 42.2 594 2944 10 27 01 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: sess311.L1024 Matching groups in /SOFTWARE/sched/catalogs/freq.dat: sh18cm Huang Xinyong 27Sept05 ****** Only 244.98 of 256.00 MHz total bandwidth is within the IFs in the setup file before any FREQ or DOPPLER shifts. Setup group: 7 Station: SHANGHAI Total bit rate: 1024 Format: MKIV1:2 Bits per sample: 2 Sample rate: 32.000 Number of channels: 16 DBE type: Speedup factor: 0.50 Disk used to record data. 1st LO= 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 Net SB= L L U U L L U U L L U U L L U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 2 1 2 3 4 3 4 5 6 5 6 7 8 7 8 BBC SB= U U L L U U L L U U L L U U L L IF = C A C A C A C A C A C A C A C A The following frequency sets based on this setup were used. Frequency Set: 10 Setup file default. Used pcal sets: 1 LO sum= 1610.49 1610.49 1610.49 1610.49 1642.49 1642.49 1642.49 1642.49 1674.49 1674.49 1674.49 1674.49 1706.49 1706.49 1706.49 1706.49 BBC fr= 689.51 689.51 689.51 689.51 657.51 657.51 657.51 657.51 625.51 625.51 625.51 625.51 593.51 593.51 593.51 593.51 Bandwd= 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = 1MHZ PCALXB1= S1 S3 S5 S7 S9 S11 S13 S15 PCALXB2= S2 S4 S6 S8 S10 S12 S14 S16 PCALFR1= 490 510 490 510 490 510 490 510 PCALFR2= 490 510 490 510 490 510 490 510 Track assignments are: track1= 2, 10, 18, 26, 3, 11, 19, 27, 66, 74, 82, 90, 67, 75, 83, 91 barrel=roll_off SOURCES USED IN RECORDING SCANS -- Disc-dirven jets in quasars 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) * 4C5324 12 13 01.472545 * 12 15 29.570000 12 16 03.501309 0.00 53 52 35.80199 * 53 35 55.90000 53 31 47.03619 0.00 From catalog imbedded in main SCHED input file. 1.167 scan and 57.026 baseline hours in setup: sess311.L1024 * DSS1251 12 49 25.847109 * 12 51 39.048000 12 52 09.158484 0.00 54 44 15.50705 * 54 27 57.94000 54 23 56.93151 0.00 From catalog imbedded in main SCHED input file. 1.167 scan and 58.235 baseline hours in setup: sess311.L1024 * DSS1329 13 27 03.473828 * 13 29 09.273000 13 29 37.796276 0.00 48 16 37.90679 * 48 01 09.19000 47 57 23.96734 0.00 From catalog imbedded in main SCHED input file. 1.167 scan and 57.656 baseline hours in setup: sess311.L1024 * DSS1418 14 16 02.803945 * 14 18 02.785000 14 18 30.061884 0.00 42 03 23.27569 * 41 49 35.27000 41 46 18.82833 0.00 From catalog imbedded in main SCHED input file. 1.156 scan and 51.253 baseline hours in setup: sess311.L1024 * J0927+3902 09 23 55.319213 * 09 27 03.013934 09 27 48.126652 0.29 0923+392 39 15 23.56646 * 39 02 20.85186 38 59 00.80495 0.16 4C39.25 /SOFTWARE/sched/catalogs/sources.vlba J0927+39 GSFC 2010a astro solution 231732 Observations 0.250 scan and 11.250 baseline hours in setup: sess311.L1024 * J1208+5441 12 06 23.662532 * 12 08 54.256376 12 09 28.768993 0.46 1206+549 54 58 39.44514 * 54 41 58.16456 54 37 48.26978 0.58 /SOFTWARE/sched/catalogs/sources.vlba GSFC 2010a astro solution 92 Observations 0.544 scan and 25.673 baseline hours in setup: sess311.L1024 * J1253+5301 12 50 58.242966 * 12 53 11.920418 12 53 42.220599 2.57 1250+532 53 17 27.81049 * 53 01 11.73781 52 57 11.48316 1.22 /SOFTWARE/sched/catalogs/sources.vlba GSFC 2010a astro solution 23 Observations 0.500 scan and 23.610 baseline hours in setup: sess311.L1024 * J1329+5009 13 27 02.183104 * 13 29 05.802710 13 29 33.702873 0.08 1327+504 50 24 55.17554 * 50 09 26.40097 50 05 40.80486 0.06 /SOFTWARE/sched/catalogs/sources.vlba GSFC 2010a astro solution 589 Observations 0.500 scan and 25.824 baseline hours in setup: sess311.L1024 * J1405+4056 14 03 04.025317 * 14 05 07.795457 14 05 36.026780 0.14 1403+411 41 11 16.37047 * 40 56 57.83085 40 53 33.21558 0.18 /SOFTWARE/sched/catalogs/sources.vlba GSFC 2010a astro solution 90 Observations 0.500 scan and 22.865 baseline hours in setup: sess311.L1024 J1642+3948 16 41 17.606228 * 16 42 58.809965 16 43 21.850974 0.81 * 3C345 39 54 10.81494 * 39 48 36.99400 39 47 29.60683 0.54 1641+399 /SOFTWARE/sched/catalogs/sources.vlba J1642+39 GSFC 2010a astro solution 52595 Observations 0.183 scan and 10.083 baseline hours in setup: sess311.L1024 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) 4C5324 73.9 DSS1251 72.0 DSS1329 64.0 DSS1418 56.5 J0927+3902 88.1 J1208+5441 75.3 J1253+5301 70.6 J1329+5009 66.0 J1405+4056 55.8 3C345 62.8 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