COVER INFORMATION Station: URUMQI (Code Ur ) 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 URUMQI (Code Ur ) 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 4958.49 4958.49 5022.49 5022.49 5022.49 5022.49 Next BBC frequencies: 338.49 338.49 338.49 338.49 402.49 402.49 402.49 402.49 Next scan bandwidths: 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 09 30 00 J0205+3212 02 30 53 77.8 205.4 0.4 21.6 0 0 09 30 00 09 38 00 =0202+319 02 38 55 77.1 212.5 0.5 27.5 480 62 09 30 01 09 39 00 J0112+3208 02 39 55 69.8 243.5 1.4 50.2 25 62 09 39 00 09 44 00 =0110+318 02 44 56 68.9 245.4 1.5 51.3 300 100 09 39 01 09 44 00 J0112+3208 02 44 56 68.9 245.4 1.5 51.3 -2 100 No stop 09 45 30 =0110+318 02 46 26 68.7 246.0 1.5 51.6 88 112 09 44 01 09 45 30 0116+319 02 46 26 69.8 243.5 1.4 50.2 -6 112 No stop 09 49 00 --- 02 49 56 69.3 244.9 1.5 51.0 204 138 09 45 31 09 49 00 J0112+3208 02 49 56 68.1 247.2 1.6 52.3 -6 138 No stop 09 50 30 =0110+318 02 51 27 67.9 247.7 1.6 52.6 84 150 09 49 01 09 50 30 0116+319 02 51 27 69.0 245.4 1.5 51.3 -6 150 No stop 09 54 00 --- 02 54 57 68.4 246.7 1.6 52.0 204 177 09 50 31 09 54 40 J0112+3208 02 55 37 67.2 249.1 1.7 53.3 34 177 09 54 40 09 56 10 =0110+318 02 57 08 66.9 249.6 1.7 53.6 90 188 09 54 41 09 56 10 0116+319 02 57 08 68.1 247.5 1.6 52.5 -6 188 No stop 09 59 40 --- 03 00 38 67.5 248.6 1.7 53.1 204 215 09 56 11 09 59 40 J0112+3208 03 00 38 66.3 250.7 1.8 54.1 -6 215 No stop 10 01 10 =0110+318 03 02 08 66.0 251.2 1.8 54.3 84 227 09 59 41 10 01 10 0116+319 03 02 08 67.2 249.1 1.7 53.3 -6 227 No stop 10 04 40 --- 03 05 39 66.6 250.3 1.7 53.9 204 254 10 01 11 10 05 20 J0112+3208 03 06 19 65.3 252.4 1.9 54.9 34 254 10 05 20 10 06 50 =0110+318 03 07 49 65.1 252.9 1.9 55.1 90 265 10 05 21 10 06 50 0116+319 03 07 49 66.3 250.9 1.8 54.2 -6 265 No stop 10 10 20 --- 03 11 20 65.7 252.0 1.8 54.7 204 292 10 06 51 10 10 20 J0112+3208 03 11 20 64.5 253.8 2.0 55.5 -6 292 No stop 10 11 50 =0110+318 03 12 50 64.2 254.3 2.0 55.7 84 304 10 10 21 10 11 50 0116+319 03 12 50 65.4 252.4 1.9 54.9 -6 304 No stop 10 15 20 --- 03 16 21 64.8 253.4 1.9 55.4 204 331 10 11 51 Schedule for URUMQI (Code Ur ) 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 03 17 01 63.5 255.4 2.0 56.1 34 331 10 16 00 10 17 30 =0110+318 03 18 31 63.2 255.8 2.1 56.3 90 342 10 16 01 10 17 30 0116+319 03 18 31 64.4 254.0 2.0 55.6 -6 342 No stop 10 21 00 --- 03 22 02 63.8 255.0 2.0 56.0 204 369 10 17 31 10 21 00 J0112+3208 03 22 02 62.6 256.7 2.1 56.6 -6 369 No stop 10 22 30 =0110+318 03 23 32 62.3 257.1 2.2 56.8 84 381 10 21 01 10 22 30 0116+319 03 23 32 63.5 255.4 2.0 56.2 -6 381 No stop 10 26 00 --- 03 27 03 62.9 256.3 2.1 56.5 204 408 10 22 31 10 26 40 J0112+3208 03 27 43 61.6 258.1 2.2 57.1 34 408 10 26 40 10 28 10 =0110+318 03 29 13 61.3 258.4 2.3 57.2 90 419 10 26 41 10 28 10 0116+319 03 29 13 62.5 256.9 2.1 56.7 -6 419 No stop 10 31 40 --- 03 32 43 61.9 257.7 2.2 57.0 204 446 10 28 11 10 31 40 J0112+3208 03 32 43 60.7 259.3 2.3 57.5 -6 446 No stop 10 33 10 =0110+318 03 34 14 60.4 259.6 2.3 57.6 84 458 10 31 41 10 33 10 0116+319 03 34 14 61.6 258.1 2.2 57.1 -5 458 No stop 10 36 40 --- 03 37 44 61.0 258.9 2.3 57.4 205 485 10 33 11 10 37 20 J0112+3208 03 38 24 59.7 260.6 2.4 57.8 35 485 10 37 20 10 38 50 =0110+318 03 39 55 59.4 260.9 2.4 57.9 90 496 10 37 21 10 38 50 0116+319 03 39 55 60.6 259.4 2.3 57.6 -5 496 No stop 10 42 20 --- 03 43 25 60.0 260.2 2.4 57.8 205 523 10 38 51 10 42 20 J0112+3208 03 43 25 58.8 261.7 2.5 58.1 -5 523 No stop 10 43 50 =0110+318 03 44 55 58.5 262.0 2.5 58.2 85 535 10 42 21 10 43 50 0116+319 03 44 55 59.7 260.6 2.4 57.9 -5 535 No stop 10 47 20 --- 03 48 26 59.1 261.3 2.5 58.1 205 562 10 43 51 10 48 00 J0112+3208 03 49 06 57.7 262.9 2.6 58.4 35 562 10 48 00 10 49 30 =0110+318 03 50 36 57.5 263.2 2.6 58.4 90 573 10 48 01 10 49 30 0116+319 03 50 36 58.7 261.8 2.5 58.2 -5 573 No stop 10 53 00 --- 03 54 07 58.1 262.6 2.6 58.4 205 600 10 49 31 10 53 00 J0112+3208 03 54 07 56.8 263.9 2.7 58.6 -5 600 No stop 10 54 30 =0110+318 03 55 37 56.6 264.2 2.7 58.6 85 612 10 53 01 Schedule for URUMQI (Code Ur ) 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 03 55 37 57.8 262.9 2.6 58.4 -5 612 No stop 10 58 00 --- 03 59 08 57.2 263.6 2.6 58.6 205 638 10 54 31 10 58 40 J0112+3208 03 59 48 55.8 265.0 2.8 58.7 34 638 10 58 40 11 00 10 =0110+318 04 01 18 55.5 265.3 2.8 58.8 90 650 10 58 41 11 00 10 0116+319 04 01 18 56.8 264.0 2.7 58.6 -5 650 No stop 11 03 40 --- 04 04 49 56.2 264.7 2.7 58.7 205 677 11 00 11 11 03 40 J0112+3208 04 04 49 54.9 266.0 2.8 58.9 -6 677 No stop 11 05 10 =0110+318 04 06 19 54.6 266.3 2.9 58.9 84 688 11 03 41 11 05 10 0116+319 04 06 19 55.9 265.0 2.8 58.8 -5 688 No stop 11 08 40 --- 04 09 50 55.2 265.7 2.8 58.9 205 715 11 05 11 11 09 20 J0112+3208 04 10 30 53.9 267.0 2.9 59.0 34 715 11 09 20 11 10 50 =0110+318 04 12 00 53.6 267.3 3.0 59.0 90 727 11 09 21 11 10 50 J0112+3208 04 12 00 53.6 267.3 3.0 59.0 -2 727 No stop 11 14 20 =0110+318 04 15 31 53.0 268.0 3.0 59.0 208 754 11 10 51 11 16 20 J0344+1559 04 17 31 61.8 196.4 0.5 12.3 44 754 11 16 20 11 21 20 =0341+158 04 22 32 61.5 198.8 0.6 14.1 300 792 11 16 21 11 21 20 J0344+1559 04 22 32 61.5 198.8 0.6 14.1 -2 792 No stop 11 22 50 =0341+158 04 24 02 61.4 199.6 0.6 14.7 88 804 11 21 21 11 22 50 0350+177 04 24 02 63.7 196.2 0.5 12.3 -8 804 No stop 11 26 20 --- 04 27 32 63.5 198.1 0.6 13.7 202 831 11 22 51 11 26 20 J0344+1559 04 27 32 61.2 201.3 0.7 15.9 -8 831 No stop 11 27 50 =0341+158 04 29 03 61.1 202.0 0.7 16.4 82 842 11 26 21 11 27 50 0350+177 04 29 03 63.5 198.8 0.6 14.3 -8 842 No stop 11 31 20 --- 04 32 33 63.2 200.6 0.6 15.6 202 869 11 27 51 11 32 00 J0344+1559 04 33 13 60.8 204.0 0.8 17.9 32 869 11 32 00 11 33 30 =0341+158 04 34 44 60.7 204.7 0.8 18.4 90 881 11 32 01 11 33 30 0350+177 04 34 44 63.1 201.7 0.7 16.4 -8 881 No stop 11 37 00 --- 04 38 14 62.9 203.5 0.7 17.7 202 908 11 33 31 11 37 00 J0344+1559 04 38 14 60.4 206.3 0.9 19.5 -8 908 No stop 11 38 30 =0341+158 04 39 44 60.3 207.0 0.9 20.0 82 919 11 37 01 Schedule for URUMQI (Code Ur ) 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 04 39 44 62.7 204.2 0.8 18.3 -8 919 No stop 11 42 00 --- 04 43 15 62.5 206.0 0.8 19.5 202 946 11 38 31 11 42 40 J0344+1559 04 43 55 59.9 208.8 1.0 21.4 32 946 11 42 40 11 44 10 =0341+158 04 45 25 59.8 209.5 1.0 21.8 90 958 11 42 41 11 44 10 0350+177 04 45 25 62.3 207.0 0.9 20.3 -8 958 No stop 11 47 40 --- 04 48 56 62.0 208.7 0.9 21.5 202 985 11 44 11 11 47 40 J0344+1559 04 48 56 59.5 211.1 1.1 22.9 -8 985 No stop 11 49 10 =0341+158 04 50 26 59.3 211.7 1.1 23.4 82 996 11 47 41 11 49 10 0350+177 04 50 26 61.9 209.4 0.9 22.0 -8 996 No stop 11 52 40 --- 04 53 57 61.6 211.0 1.0 23.1 202 1023 11 49 11 11 53 20 J0344+1559 04 54 37 58.9 213.5 1.1 24.6 32 1023 11 53 20 11 54 50 =0341+158 04 56 07 58.8 214.1 1.2 25.1 90 1035 11 53 21 11 54 50 0350+177 04 56 07 61.3 212.0 1.0 23.9 -8 1035 No stop 11 58 20 --- 04 59 38 61.0 213.6 1.1 25.0 202 1062 11 54 51 11 58 20 J0344+1559 04 59 38 58.4 215.6 1.2 26.1 -8 1062 No stop 11 59 50 =0341+158 05 01 08 58.2 216.2 1.3 26.5 82 1073 11 58 21 11 59 50 0350+177 05 01 08 60.8 214.2 1.1 25.4 -8 1073 No stop 12 03 20 --- 05 04 39 60.5 215.8 1.2 26.5 202 1100 11 59 51 12 04 00 J0344+1559 05 05 19 57.8 217.9 1.3 27.6 32 1100 12 04 00 12 05 30 =0341+158 05 06 49 57.6 218.5 1.4 28.0 90 1112 12 04 01 12 05 30 0350+177 05 06 49 60.2 216.7 1.2 27.1 -8 1112 No stop 12 09 00 --- 05 10 19 59.9 218.2 1.3 28.1 202 1138 12 05 31 12 09 00 J0344+1559 05 10 19 57.2 219.9 1.4 29.0 -8 1138 No stop 12 10 30 =0341+158 05 11 50 57.0 220.4 1.4 29.3 82 1150 12 09 01 12 10 30 0350+177 05 11 50 59.7 218.8 1.3 28.6 -8 1150 No stop 12 14 00 --- 05 15 20 59.3 220.3 1.4 29.5 202 1177 12 10 31 12 14 40 J0344+1559 05 16 00 56.5 222.0 1.5 30.4 32 1177 12 14 40 12 16 10 =0341+158 05 17 31 56.4 222.6 1.5 30.7 90 1188 12 14 41 12 16 10 0350+177 05 17 31 59.0 221.1 1.4 30.1 -8 1188 No stop 12 19 40 --- 05 21 01 58.6 222.5 1.4 31.0 202 1215 12 16 11 Schedule for URUMQI (Code Ur ) 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 05 21 01 55.9 223.9 1.6 31.6 -8 1215 No stop 12 21 10 =0341+158 05 22 31 55.7 224.4 1.6 31.9 82 1227 12 19 41 12 21 10 0350+177 05 22 31 58.4 223.1 1.5 31.4 -8 1227 No stop 12 24 40 --- 05 26 02 58.0 224.4 1.5 32.3 202 1254 12 21 11 12 25 20 J0344+1559 05 26 42 55.2 225.9 1.7 32.9 32 1254 12 25 20 12 26 50 =0341+158 05 28 12 55.0 226.5 1.7 33.2 90 1265 12 25 21 12 26 50 0350+177 05 28 12 57.7 225.3 1.6 32.8 -8 1265 No stop 12 30 20 --- 05 31 43 57.2 226.6 1.6 33.6 202 1292 12 26 51 12 30 20 J0344+1559 05 31 43 54.5 227.7 1.8 33.9 -8 1292 No stop 12 31 50 =0341+158 05 33 13 54.3 228.2 1.8 34.3 82 1304 12 30 21 12 31 50 0350+177 05 33 13 57.0 227.1 1.7 34.0 -8 1304 No stop 12 35 20 --- 05 36 44 56.6 228.4 1.7 34.8 202 1331 12 31 51 12 36 00 J0344+1559 05 37 24 53.7 229.6 1.9 35.1 32 1331 12 36 00 12 37 30 =0341+158 05 38 54 53.5 230.1 1.9 35.4 90 1342 12 36 01 12 37 30 0350+177 05 38 54 56.3 229.1 1.7 35.2 -8 1342 No stop 12 41 00 --- 05 42 25 55.8 230.3 1.8 36.0 202 1369 12 37 31 12 41 00 J0344+1559 05 42 25 53.0 231.2 1.9 36.1 -9 1369 No stop 12 42 30 =0341+158 05 43 55 52.8 231.7 2.0 36.4 81 1381 12 41 01 12 42 30 0350+177 05 43 55 55.6 230.9 1.8 36.3 -8 1381 No stop 12 46 00 --- 05 47 26 55.1 232.0 1.9 37.0 202 1408 12 42 31 12 46 40 J0344+1559 05 48 06 52.2 233.1 2.0 37.1 31 1408 12 46 40 12 48 10 =0341+158 05 49 36 52.0 233.5 2.1 37.4 90 1419 12 46 41 12 48 10 0350+177 05 49 36 54.8 232.8 1.9 37.4 -8 1419 No stop 12 51 40 --- 05 53 06 54.3 233.9 2.0 38.1 202 1446 12 48 11 12 51 40 J0344+1559 05 53 06 51.5 234.6 2.1 38.0 -9 1446 No stop 12 53 10 =0341+158 05 54 37 51.3 235.1 2.1 38.2 81 1458 12 51 41 12 53 10 0350+177 05 54 37 54.0 234.4 2.0 38.3 -8 1458 No stop 12 56 40 --- 05 58 07 53.5 235.5 2.1 38.9 202 1485 12 53 11 12 57 20 J0344+1559 05 58 47 50.7 236.3 2.2 38.9 31 1485 12 57 20 12 58 50 =0341+158 06 00 18 50.4 236.7 2.2 39.2 90 1496 12 57 21 Schedule for URUMQI (Code Ur ) 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 06 00 18 50.4 236.7 2.2 39.2 -2 1496 No stop 13 00 00 =0341+158 06 01 28 50.2 237.1 2.3 39.3 68 1505 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: 14 Station: URUMQI Total bit rate: 1024 Format: MARK5B 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= 4620.00 4620.00 4620.00 4620.00 4620.00 4620.00 4620.00 4620.00 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 = A2 C1 A2 C1 A2 C1 A2 C1 The following frequency sets based on these setups were used. Frequency Set: 8 Setup file default. Used with PCAL = off LO sum= 4958.49 4958.49 4958.49 4958.49 5022.49 5022.49 5022.49 5022.49 BBC fr= 338.49 338.49 338.49 338.49 402.49 402.49 402.49 402.49 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= 10, 14, 2, 6, 12, 16, 4, 8 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