COVER INFORMATION Station: KNOCKIN (Code Kn ) Experiment: ET048B Exp. Code: ET048B Schedule Version: 2.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: Oleg Titov Address: Geoscience Australia Cnr Jerrabomberra Avenue and Hindmarsh Drive Symonston ACT 2609 GPO Box 378 Canberra ACT 2601 Australia Phone: +61 2 6249 9064 EMAIL: Oleg.Titov@ga.gov.au Fax: Phone during observation: +61 2 6249 9064 Observing mode: Notes: Imaging extragalactic radio sources with extremely large radio-optical offsets Devided on 3 epochs: ET048A, ET048B, ET048C 6cm, 1024 Mbps, RCP & LCP, 2 bit sampling Prepared by Alexey Melnikov, aem@iaaras.ru Schedule for KNOCKIN (Code Kn ) Page 2 ET048B 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 10 Mar 2022 Day 69 --- Next scan frequencies: 4958.49 4958.49 Next BBC frequencies: 705.51 705.51 Next scan bandwidths: 64.00 64.00 09 30 00 J0205+3212 20 30 11 28.6 73.2 -5.6 -43.2 0 0 09 30 00 09 38 00 =0202+319 20 38 13 29.8 74.6 -5.5 -43.6 480 31 09 30 01 09 39 00 J0112+3208 20 39 13 37.6 84.3 -4.6 -45.4 8 31 09 39 00 09 44 00 =0110+318 20 44 14 38.4 85.3 -4.5 -45.5 300 50 09 39 01 09 44 00 J0112+3208 20 44 14 38.4 85.3 -4.5 -45.5 -2 50 No stop 09 45 30 =0110+318 20 45 44 38.6 85.6 -4.5 -45.5 88 56 09 44 01 09 45 30 0116+319 20 45 44 37.6 84.3 -4.6 -45.4 -20 56 No stop 09 49 00 --- 20 49 14 38.2 84.9 -4.5 -45.4 190 70 09 45 31 09 49 00 J0112+3208 20 49 14 39.2 86.2 -4.4 -45.5 -21 70 No stop 09 50 30 =0110+318 20 50 45 39.4 86.5 -4.4 -45.5 69 75 09 49 01 09 50 30 0116+319 20 50 45 38.4 85.2 -4.5 -45.5 -20 75 No stop 09 54 00 --- 20 54 15 38.9 85.9 -4.4 -45.5 190 89 09 50 31 09 54 40 J0112+3208 20 54 55 40.0 87.3 -4.3 -45.6 19 89 09 54 40 09 56 10 =0110+318 20 56 26 40.2 87.6 -4.3 -45.6 90 95 09 54 41 09 56 10 0116+319 20 56 26 39.2 86.3 -4.4 -45.6 -20 95 No stop 09 59 40 --- 20 59 56 39.8 87.0 -4.3 -45.6 190 108 09 56 11 09 59 40 J0112+3208 20 59 56 40.8 88.3 -4.2 -45.6 -21 108 No stop 10 01 10 =0110+318 21 01 26 41.0 88.6 -4.2 -45.6 69 114 09 59 41 10 01 10 0116+319 21 01 26 40.0 87.2 -4.3 -45.6 -20 114 No stop 10 04 40 --- 21 04 57 40.5 87.9 -4.3 -45.6 190 128 10 01 11 10 05 20 J0112+3208 21 05 37 41.6 89.4 -4.1 -45.6 19 128 10 05 20 10 06 50 =0110+318 21 07 07 41.9 89.7 -4.1 -45.6 90 133 10 05 21 10 06 50 0116+319 21 07 07 40.9 88.3 -4.2 -45.7 -20 133 No stop 10 10 20 --- 21 10 38 41.4 89.0 -4.2 -45.7 190 147 10 06 51 10 10 20 J0112+3208 21 10 38 42.4 90.4 -4.1 -45.6 -21 147 No stop 10 11 50 =0110+318 21 12 08 42.6 90.7 -4.0 -45.6 69 153 10 10 21 10 11 50 0116+319 21 12 08 41.6 89.3 -4.1 -45.7 -20 153 No stop 10 15 20 --- 21 15 39 42.2 90.0 -4.1 -45.7 190 166 10 11 51 Schedule for KNOCKIN (Code Kn ) Page 3 ET048B 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 10 Mar 2022 Day 69 --- 10 16 00 J0112+3208 21 16 19 43.2 91.6 -4.0 -45.6 19 166 10 16 00 10 17 30 =0110+318 21 17 49 43.5 91.9 -3.9 -45.6 90 172 10 16 01 10 17 30 0116+319 21 17 49 42.5 90.5 -4.0 -45.7 -20 172 No stop 10 21 00 --- 21 21 20 43.0 91.2 -4.0 -45.7 190 185 10 17 31 10 21 00 J0112+3208 21 21 20 44.0 92.6 -3.9 -45.6 -21 185 No stop 10 22 30 =0110+318 21 22 50 44.2 92.9 -3.9 -45.6 69 191 10 21 01 10 22 30 0116+319 21 22 50 43.2 91.5 -4.0 -45.7 -20 191 No stop 10 26 00 --- 21 26 20 43.8 92.2 -3.9 -45.6 190 205 10 22 31 10 26 40 J0112+3208 21 27 01 44.9 93.8 -3.8 -45.5 19 205 10 26 40 10 28 10 =0110+318 21 28 31 45.1 94.1 -3.8 -45.5 90 211 10 26 41 10 28 10 0116+319 21 28 31 44.1 92.6 -3.9 -45.6 -21 211 No stop 10 31 40 --- 21 32 01 44.6 93.4 -3.8 -45.6 189 224 10 28 11 10 31 40 J0112+3208 21 32 01 45.6 94.8 -3.7 -45.4 -22 224 No stop 10 33 10 =0110+318 21 33 32 45.8 95.1 -3.7 -45.4 68 230 10 31 41 10 33 10 0116+319 21 33 32 44.9 93.7 -3.8 -45.6 -21 230 No stop 10 36 40 --- 21 37 02 45.4 94.4 -3.7 -45.5 189 243 10 33 11 10 37 20 J0112+3208 21 37 42 46.5 96.0 -3.6 -45.3 18 243 10 37 20 10 38 50 =0110+318 21 39 13 46.7 96.4 -3.6 -45.3 90 249 10 37 21 10 38 50 0116+319 21 39 13 45.7 94.9 -3.7 -45.5 -21 249 No stop 10 42 20 --- 21 42 43 46.2 95.6 -3.6 -45.4 189 263 10 38 51 10 42 20 J0112+3208 21 42 43 47.2 97.1 -3.5 -45.2 -22 263 No stop 10 43 50 =0110+318 21 44 13 47.5 97.5 -3.5 -45.2 68 269 10 42 21 10 43 50 0116+319 21 44 13 46.5 95.9 -3.6 -45.4 -21 269 No stop 10 47 20 --- 21 47 44 47.0 96.7 -3.6 -45.3 189 282 10 43 51 10 48 00 J0112+3208 21 48 24 48.1 98.4 -3.4 -45.0 18 282 10 48 00 10 49 30 =0110+318 21 49 54 48.3 98.7 -3.4 -45.0 90 288 10 48 01 10 49 30 0116+319 21 49 54 47.3 97.2 -3.5 -45.2 -21 288 No stop 10 53 00 --- 21 53 25 47.8 98.0 -3.5 -45.1 189 301 10 49 31 10 53 00 J0112+3208 21 53 25 48.8 99.5 -3.3 -44.8 -22 301 No stop 10 54 30 =0110+318 21 54 55 49.0 99.9 -3.3 -44.8 68 307 10 53 01 Schedule for KNOCKIN (Code Kn ) Page 4 ET048B 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 10 Mar 2022 Day 69 --- 10 54 30 0116+319 21 54 55 48.1 98.3 -3.4 -45.1 -21 307 No stop 10 58 00 --- 21 58 26 48.6 99.1 -3.4 -44.9 189 321 10 54 31 10 58 40 J0112+3208 21 59 06 49.7 100.8 -3.2 -44.6 18 321 10 58 40 11 00 10 =0110+318 22 00 36 49.9 101.2 -3.2 -44.5 90 327 10 58 41 11 00 10 0116+319 22 00 36 48.9 99.6 -3.3 -44.9 -22 327 No stop 11 03 40 --- 22 04 07 49.4 100.4 -3.3 -44.7 188 340 11 00 11 11 03 40 J0112+3208 22 04 07 50.4 102.0 -3.2 -44.4 -23 340 No stop 11 05 10 =0110+318 22 05 37 50.6 102.4 -3.1 -44.3 67 346 11 03 41 11 05 10 0116+319 22 05 37 49.7 100.7 -3.3 -44.7 -22 346 No stop 11 08 40 --- 22 09 08 50.2 101.5 -3.2 -44.5 188 359 11 05 11 11 09 20 J0112+3208 22 09 48 51.3 103.4 -3.1 -44.1 17 359 11 09 20 11 10 50 =0110+318 22 11 18 51.5 103.7 -3.0 -44.0 90 365 11 09 21 11 10 50 J0112+3208 22 11 18 51.5 103.7 -3.0 -44.0 -2 365 No stop 11 14 20 =0110+318 22 14 48 52.0 104.6 -3.0 -43.8 208 379 11 10 51 11 16 20 J0344+1559 22 16 49 17.4 86.2 -5.5 -38.9 -7 379 11 16 20 11 21 20 =0341+158 22 21 50 18.2 87.2 -5.4 -38.9 293 398 11 16 21 11 21 20 J0344+1559 22 21 50 18.2 87.2 -5.4 -38.9 -2 398 No stop 11 22 50 =0341+158 22 23 20 18.4 87.5 -5.4 -39.0 88 404 11 21 21 11 22 50 0350+177 22 23 20 18.6 84.5 -5.5 -39.3 -29 404 No stop 11 26 20 --- 22 26 50 19.1 85.2 -5.5 -39.3 181 417 11 22 51 11 26 20 J0344+1559 22 26 50 18.9 88.2 -5.3 -39.0 -30 417 No stop 11 27 50 =0341+158 22 28 21 19.2 88.5 -5.3 -39.0 60 423 11 26 21 11 27 50 0350+177 22 28 21 19.3 85.5 -5.4 -39.3 -29 423 No stop 11 31 20 --- 22 31 51 19.9 86.2 -5.4 -39.4 181 437 11 27 51 11 32 00 J0344+1559 22 32 31 19.8 89.3 -5.2 -39.0 10 437 11 32 00 11 33 30 =0341+158 22 34 02 20.0 89.6 -5.2 -39.0 90 442 11 32 01 11 33 30 0350+177 22 34 02 20.2 86.6 -5.3 -39.4 -29 442 No stop 11 37 00 --- 22 37 32 20.7 87.3 -5.3 -39.4 181 456 11 33 31 11 37 00 J0344+1559 22 37 32 20.5 90.3 -5.1 -39.0 -30 456 No stop 11 38 30 =0341+158 22 39 02 20.8 90.6 -5.1 -39.0 60 462 11 37 01 Schedule for KNOCKIN (Code Kn ) Page 5 ET048B 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 10 Mar 2022 Day 69 --- 11 38 30 0350+177 22 39 02 21.0 87.6 -5.3 -39.4 -29 462 No stop 11 42 00 --- 22 42 33 21.5 88.3 -5.2 -39.5 181 475 11 38 31 11 42 40 J0344+1559 22 43 13 21.4 91.4 -5.0 -39.0 10 475 11 42 40 11 44 10 =0341+158 22 44 43 21.6 91.7 -5.0 -39.0 90 481 11 42 41 11 44 10 0350+177 22 44 43 21.8 88.7 -5.2 -39.5 -29 481 No stop 11 47 40 --- 22 48 14 22.4 89.4 -5.1 -39.5 181 495 11 44 11 11 47 40 J0344+1559 22 48 14 22.2 92.4 -5.0 -39.0 -30 495 No stop 11 49 10 =0341+158 22 49 44 22.4 92.7 -4.9 -38.9 60 500 11 47 41 11 49 10 0350+177 22 49 44 22.6 89.7 -5.1 -39.5 -29 500 No stop 11 52 40 --- 22 53 15 23.1 90.4 -5.0 -39.5 181 514 11 49 11 11 53 20 J0344+1559 22 53 55 23.0 93.6 -4.9 -38.9 10 514 11 53 20 11 54 50 =0341+158 22 55 25 23.2 93.9 -4.8 -38.9 90 520 11 53 21 11 54 50 0350+177 22 55 25 23.4 90.8 -5.0 -39.5 -29 520 No stop 11 58 20 --- 22 58 56 24.0 91.6 -4.9 -39.5 181 533 11 54 51 11 58 20 J0344+1559 22 58 56 23.8 94.6 -4.8 -38.8 -30 533 No stop 11 59 50 =0341+158 23 00 26 24.0 94.9 -4.8 -38.8 60 539 11 58 21 11 59 50 0350+177 23 00 26 24.2 91.9 -4.9 -39.5 -29 539 No stop 12 03 20 --- 23 03 56 24.7 92.6 -4.8 -39.4 181 553 11 59 51 12 04 00 J0344+1559 23 04 37 24.6 95.8 -4.7 -38.8 10 553 12 04 00 12 05 30 =0341+158 23 06 07 24.9 96.1 -4.7 -38.7 90 558 12 04 01 12 05 30 0350+177 23 06 07 25.1 93.0 -4.8 -39.4 -29 558 No stop 12 09 00 --- 23 09 37 25.6 93.7 -4.7 -39.4 181 572 12 05 31 12 09 00 J0344+1559 23 09 37 25.4 96.8 -4.6 -38.7 -30 572 No stop 12 10 30 =0341+158 23 11 08 25.6 97.1 -4.6 -38.6 60 578 12 09 01 12 10 30 0350+177 23 11 08 25.8 94.0 -4.7 -39.4 -29 578 No stop 12 14 00 --- 23 14 38 26.3 94.7 -4.7 -39.3 181 591 12 10 31 12 14 40 J0344+1559 23 15 18 26.2 98.0 -4.5 -38.6 10 591 12 14 40 12 16 10 =0341+158 23 16 49 26.5 98.3 -4.5 -38.5 90 597 12 14 41 12 16 10 0350+177 23 16 49 26.7 95.2 -4.6 -39.3 -29 597 No stop 12 19 40 --- 23 20 19 27.2 95.9 -4.6 -39.2 181 611 12 16 11 Schedule for KNOCKIN (Code Kn ) Page 6 ET048B 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 10 Mar 2022 Day 69 --- 12 19 40 J0344+1559 23 20 19 27.0 99.0 -4.4 -38.4 -30 611 No stop 12 21 10 =0341+158 23 21 49 27.2 99.4 -4.4 -38.4 60 616 12 19 41 12 21 10 0350+177 23 21 49 27.4 96.2 -4.5 -39.2 -30 616 No stop 12 24 40 --- 23 25 20 27.9 97.0 -4.5 -39.1 180 630 12 21 11 12 25 20 J0344+1559 23 26 00 27.8 100.2 -4.3 -38.3 9 630 12 25 20 12 26 50 =0341+158 23 27 30 28.1 100.6 -4.3 -38.2 90 636 12 25 21 12 26 50 0350+177 23 27 30 28.3 97.4 -4.4 -39.1 -30 636 No stop 12 30 20 --- 23 31 01 28.8 98.1 -4.4 -39.0 180 649 12 26 51 12 30 20 J0344+1559 23 31 01 28.6 101.3 -4.2 -38.1 -31 649 No stop 12 31 50 =0341+158 23 32 31 28.8 101.6 -4.2 -38.1 59 655 12 30 21 12 31 50 0350+177 23 32 31 29.0 98.5 -4.4 -39.0 -30 655 No stop 12 35 20 --- 23 36 02 29.6 99.2 -4.3 -38.9 180 669 12 31 51 12 36 00 J0344+1559 23 36 42 29.4 102.5 -4.1 -37.9 9 669 12 36 00 12 37 30 =0341+158 23 38 12 29.6 102.9 -4.1 -37.8 90 674 12 36 01 12 37 30 0350+177 23 38 12 29.9 99.7 -4.3 -38.8 -30 674 No stop 12 41 00 --- 23 41 43 30.4 100.4 -4.2 -38.7 180 688 12 37 31 12 41 00 J0344+1559 23 41 43 30.2 103.6 -4.1 -37.7 -31 688 No stop 12 42 30 =0341+158 23 43 13 30.4 104.0 -4.0 -37.6 59 694 12 41 01 12 42 30 0350+177 23 43 13 30.6 100.7 -4.2 -38.7 -30 694 No stop 12 46 00 --- 23 46 43 31.1 101.5 -4.1 -38.5 180 707 12 42 31 12 46 40 J0344+1559 23 47 24 31.0 104.9 -4.0 -37.5 9 707 12 46 40 12 48 10 =0341+158 23 48 54 31.2 105.2 -3.9 -37.4 90 713 12 46 41 12 48 10 0350+177 23 48 54 31.5 102.0 -4.1 -38.5 -30 713 No stop 12 51 40 --- 23 52 24 32.0 102.8 -4.0 -38.3 180 727 12 48 11 12 51 40 J0344+1559 23 52 24 31.7 106.0 -3.9 -37.2 -31 727 No stop 12 53 10 =0341+158 23 53 55 31.9 106.4 -3.9 -37.1 59 732 12 51 41 12 53 10 0350+177 23 53 55 32.2 103.1 -4.0 -38.3 -30 732 No stop 12 56 40 --- 23 57 25 32.7 103.9 -3.9 -38.1 180 746 12 53 11 12 57 20 J0344+1559 23 58 05 32.5 107.3 -3.8 -36.9 9 746 12 57 20 12 58 50 =0341+158 23 59 36 32.8 107.7 -3.8 -36.8 90 752 12 57 21 Schedule for KNOCKIN (Code Kn ) Page 7 ET048B 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 10 Mar 2022 Day 69 --- 12 58 50 J0344+1559 23 59 36 32.8 107.7 -3.8 -36.8 -2 752 No stop 13 00 00 =0341+158 00 00 46 32.9 107.9 -3.7 -36.8 68 756 12 58 51 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess122.C1024 --- WARNING --- This group does not match an entry in the frequency catalog. This might be ok because the catalog is not complete. But be very careful to be sure that the setup is correct. Setup group: 19 Station: KNOCKIN Total bit rate: 512 Format: VDIF Bits per sample: 2 Sample rate:128.000 Number of channels: 2 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 5664.00 5664.00 Net SB= U U IF SB = L L Pol. = RCP LCP BBC = 1 9 BBC SB= L L IF = A1 B1 The following frequency sets based on these setups were used. Frequency Set: 17 Setup file default. Used with PCAL = off LO sum= 4958.49 4958.49 BBC fr= 705.51 705.51 Bandwd= 64.00 64.00 Matching frequency sets: 17 18 19 20 21 Track assignments are: track1= 1, 2 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * 0116+319 01 16 47.245342 * 01 19 35.000876 01 20 47.235190 0.00 J0119+3210 31 55 05.83643 * 32 10 50.06197 32 17 43.24396 0.00 From catalog imbedded in main SCHED input file. Titov,ET048B * 0350+177 03 50 00.966044 * 03 52 52.916665 03 54 07.877792 0.00 J0352+1754 17 45 43.68362 * 17 54 36.73124 17 58 29.71015 0.00 From catalog imbedded in main SCHED input file. Titov,ET048B 0110+318 01 10 03.762623 * 01 12 50.333053 01 14 02.020049 0.09 * J0112+3208 31 52 23.76439 * 32 08 17.43262 32 15 14.44864 0.12 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 152 observations. 0202+319 02 02 09.652800 * 02 05 04.925362 02 06 20.670193 0.00 * J0205+3212 31 58 10.39522 * 32 12 30.09544 32 18 48.04475 0.00 J0205+32 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 49141 observations. 0341+158 03 41 33.676026 * 03 44 23.172163 03 45 37.016823 0.05 * J0344+1559 15 50 19.30713 * 15 59 43.36917 16 03 49.23475 0.09 J0344+15 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 503 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 0116+319 sess122.C1024 1 2 3 4 5 6 7 8 9 10 11 12 + 0.933 176.426 0350+177 sess122.C1024 1 2 3 4 5 6 7 8 9 10 11 12 + 1.050 192.736 J0112+3208 sess122.C1024 1 2 3 4 5 6 7 8 9 10 11 12 + 0.567 107.988 J0205+3212 sess122.C1024 1 2 3 4 5 6 7 8 9 10 11 12 + 0.133 28.000 J0344+1559 sess122.C1024 1 2 3 4 5 6 7 8 9 10 11 12 + 0.578 102.742 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) 0116+319 45.9 0350+177 70.4 J0112+3208 44.9 J0205+3212 53.1 J0344+1559 68.0 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