COVER INFORMATION Station: HART (Code Hh ) Experiment: Multi-freq study on FRB PRSs - FRB190520 Exp. Code: EB104A Schedule Version: 2.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: Bhandari Address: JIVE Oude Hoogeveensedijk 4 Dwingeloo Netherlands Phone: +31 521 596 508 EMAIL: marcote@jive.eu Fax: +31 521 596 508 Phone during observation: +31 521 596 508 Observing mode: evn Notes: ########################################################### ### Please, make sure PHASE CAL, CONT Tsys, AGC is OFF. ### ########################################################### Schedule for HART (Code Hh ) Page 2 Multi-freq study on FRB PRSs - FRB190520 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 ---------------------------------------------------------------------------------------- --- Fri 21 Feb 2025 Day 52 --- 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 03 00 00 J1550+0527 14 55 54 55.9 25.4 -0.9 0.0 0 0 03 00 00 03 02 00 =1548+056 14 57 55 56.1 24.6 -0.9 0.0 120 15 03 00 01 03 02 20 J1550+0527 14 58 15 56.1 24.5 -0.9 0.0 -1 15 03 02 20 03 06 00 =1548+056 15 01 55 56.5 22.9 -0.8 0.0 219 44 03 02 21 03 06 20 J1550+0527 15 02 15 56.5 22.8 -0.8 0.0 -1 44 03 06 20 03 10 00 =1548+056 15 05 56 56.8 21.2 -0.8 0.0 219 72 03 06 21 03 12 00 J1605-1139 15 07 56 70.2 47.1 -1.0 0.0 59 72 03 12 00 03 13 30 =1602-115 15 09 27 70.4 46.3 -1.0 0.0 90 84 03 12 01 03 13 30 FRB190520 15 09 27 70.7 43.8 -0.9 0.0 -27 84 No stop 03 18 00 --- 15 13 57 71.4 41.1 -0.8 0.0 243 119 03 13 31 03 18 30 J1605-1139 15 14 27 71.2 43.4 -0.9 0.0 3 119 03 18 30 03 19 40 =1602-115 15 15 38 71.4 42.7 -0.9 0.0 70 128 03 18 31 03 19 40 FRB190520 15 15 38 71.6 40.1 -0.8 0.0 -27 128 No stop 03 24 10 --- 15 20 08 72.2 37.1 -0.7 0.0 243 162 03 19 41 03 24 10 J1605-1139 15 20 08 72.1 39.9 -0.8 0.0 -27 162 No stop 03 26 00 =1602-115 15 21 59 72.3 38.7 -0.7 0.0 83 176 03 24 11 03 26 00 FRB190520 15 21 59 72.5 35.9 -0.7 0.0 -27 176 No stop 03 30 30 --- 15 26 29 73.1 32.7 -0.6 0.0 243 211 03 26 01 03 31 00 J1605-1139 15 26 59 73.0 35.3 -0.7 0.0 3 211 03 31 00 03 32 10 =1602-115 15 28 10 73.2 34.5 -0.6 0.0 70 220 03 31 01 03 32 10 J1603-1007 15 28 10 72.1 30.5 -0.6 0.0 -29 220 No stop 03 36 40 =1600-099 15 32 40 72.6 27.2 -0.5 0.0 241 255 03 32 11 03 36 40 J1605-1139 15 32 40 73.7 31.1 -0.6 0.0 -29 255 No stop 03 38 30 =1602-115 15 34 31 73.9 29.7 -0.5 0.0 81 269 03 36 41 03 38 30 FRB190520 15 34 31 73.9 26.5 -0.5 0.0 -27 269 No stop 03 43 00 --- 15 39 01 74.4 22.8 -0.4 0.0 243 304 03 38 31 03 43 30 J1605-1139 15 39 31 74.5 25.6 -0.5 0.0 3 304 03 43 30 03 44 40 =1602-115 15 40 42 74.6 24.6 -0.4 0.0 70 313 03 43 31 Schedule for HART (Code Hh ) Page 3 Multi-freq study on FRB PRSs - FRB190520 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 ---------------------------------------------------------------------------------------- --- Fri 21 Feb 2025 Day 52 --- 03 44 40 FRB190520 15 40 42 74.5 21.3 -0.4 0.0 -27 313 No stop 03 49 10 --- 15 45 12 74.8 17.4 -0.3 0.0 243 348 03 44 41 03 49 10 J1605-1139 15 45 12 75.0 20.7 -0.4 0.0 -27 348 No stop 03 51 00 =1602-115 15 47 03 75.1 19.0 -0.3 0.0 83 362 03 49 11 03 51 00 FRB190520 15 47 03 75.0 15.7 -0.3 0.0 -27 362 No stop 03 55 30 --- 15 51 33 75.2 11.5 -0.2 0.0 243 397 03 51 01 03 56 00 J1605-1139 15 52 03 75.4 14.4 -0.2 0.0 3 397 03 56 00 03 57 10 =1602-115 15 53 14 75.5 13.3 -0.2 0.0 70 406 03 56 01 03 57 10 FRB190520 15 53 14 75.3 9.9 -0.2 0.0 -27 406 No stop 04 01 40 --- 15 57 44 75.4 5.6 -0.1 0.0 243 441 03 57 11 04 01 40 J1605-1139 15 57 44 75.7 8.9 -0.1 0.0 -27 441 No stop 04 03 30 =1602-115 15 59 35 75.7 7.1 -0.1 0.0 83 455 04 01 41 04 03 30 FRB190520 15 59 35 75.4 3.8 -0.1 0.0 -27 455 No stop 04 08 00 --- 16 04 05 75.5 359.4 0.0 0.0 243 490 04 03 31 04 08 30 J1605-1139 16 04 36 75.8 2.1 -0.0 0.0 3 490 04 08 30 04 09 40 =1602-115 16 05 46 75.8 0.9 -0.0 0.0 70 499 04 08 31 04 09 40 J1603-1007 16 05 46 74.3 359.0 0.0 0.0 -29 499 No stop 04 14 10 =1600-099 16 10 16 74.2 354.9 0.1 0.0 241 533 04 09 41 04 14 10 J1605-1139 16 10 16 75.8 356.4 0.1 0.0 -29 533 No stop 04 16 00 =1602-115 16 12 07 75.8 354.6 0.1 0.0 81 547 04 14 11 04 16 00 FRB190520 16 12 07 75.3 351.6 0.1 0.0 -27 547 No stop 04 20 30 --- 16 16 38 75.1 347.3 0.2 0.0 243 582 04 16 01 04 21 00 J1605-1139 16 17 08 75.6 349.6 0.2 0.0 3 582 04 21 00 04 22 10 =1602-115 16 18 18 75.6 348.5 0.2 0.0 70 591 04 21 01 04 22 10 FRB190520 16 18 18 75.1 345.8 0.2 0.0 -27 591 No stop 04 26 40 --- 16 22 49 74.8 341.7 0.3 0.0 243 626 04 22 11 04 26 40 J1605-1139 16 22 49 75.3 344.2 0.3 0.0 -27 626 No stop 04 28 30 =1602-115 16 24 39 75.2 342.5 0.3 0.0 83 640 04 26 41 04 28 30 FRB190520 16 24 39 74.6 340.0 0.4 0.0 -27 640 No stop 04 33 00 --- 16 29 10 74.3 336.2 0.4 0.0 243 675 04 28 31 Schedule for HART (Code Hh ) Page 4 Multi-freq study on FRB PRSs - FRB190520 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 ---------------------------------------------------------------------------------------- --- Fri 21 Feb 2025 Day 52 --- 04 33 30 J1605-1139 16 29 40 74.8 338.0 0.4 0.0 3 675 04 33 30 04 34 40 =1602-115 16 30 50 74.7 337.0 0.4 0.0 70 684 04 33 31 04 34 40 FRB190520 16 30 50 74.1 334.8 0.5 0.0 -27 684 No stop 04 39 10 --- 16 35 21 73.6 331.1 0.5 0.0 243 719 04 34 41 04 39 10 J1605-1139 16 35 21 74.3 333.2 0.5 0.0 -27 719 No stop 04 41 00 =1602-115 16 37 11 74.1 331.7 0.5 0.0 83 733 04 39 11 04 41 00 FRB190520 16 37 11 73.4 329.7 0.6 0.0 -27 733 No stop 04 45 30 --- 16 41 42 72.9 326.4 0.6 0.0 243 768 04 41 01 04 46 00 J1605-1139 16 42 12 73.5 327.8 0.6 0.0 3 768 04 46 00 04 47 10 =1602-115 16 43 22 73.4 326.9 0.6 0.0 70 777 04 46 01 04 47 10 J1603-1007 16 43 22 71.8 328.0 0.6 0.0 -29 777 No stop 04 51 40 =1600-099 16 47 53 71.3 325.0 0.7 0.0 241 812 04 47 11 04 51 40 J1605-1139 16 47 53 72.8 323.6 0.7 0.0 -29 812 No stop 04 53 30 =1602-115 16 49 43 72.6 322.4 0.7 0.0 81 826 04 51 41 04 53 30 FRB190520 16 49 43 71.8 320.9 0.8 0.0 -27 826 No stop 04 58 00 --- 16 54 14 71.2 318.1 0.8 0.0 243 861 04 53 31 04 58 30 J1605-1139 16 54 44 71.9 319.1 0.8 0.0 3 861 04 58 30 04 59 40 =1602-115 16 55 54 71.7 318.4 0.8 0.0 70 870 04 58 31 04 59 40 FRB190520 16 55 54 70.9 317.1 0.9 0.0 -27 870 No stop 05 04 10 --- 17 00 25 70.2 314.6 0.9 0.0 243 904 04 59 41 05 04 10 J1605-1139 17 00 25 71.0 315.7 0.9 0.0 -27 904 No stop 05 06 00 =1602-115 17 02 15 70.7 314.6 0.9 0.0 83 918 05 04 11 05 06 00 FRB190520 17 02 15 69.9 313.6 1.0 0.0 -27 918 No stop 05 10 30 --- 17 06 46 69.2 311.3 1.1 0.0 243 953 05 06 01 05 11 00 J1605-1139 17 07 16 69.9 311.9 1.0 0.0 3 953 05 11 00 05 12 10 =1602-115 17 08 26 69.7 311.3 1.0 0.0 70 962 05 11 01 05 12 10 FRB190520 17 08 26 68.9 310.4 1.1 0.0 -27 962 No stop 05 16 40 --- 17 12 57 68.1 308.3 1.2 0.0 243 997 05 12 11 05 16 40 J1605-1139 17 12 57 68.9 309.1 1.1 0.0 -27 997 No stop 05 18 30 =1602-115 17 14 47 68.6 308.2 1.1 0.0 83 1011 05 16 41 Schedule for HART (Code Hh ) Page 5 Multi-freq study on FRB PRSs - FRB190520 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 ---------------------------------------------------------------------------------------- --- Fri 21 Feb 2025 Day 52 --- 05 18 30 FRB190520 17 14 47 67.8 307.5 1.2 0.0 -27 1011 No stop 05 23 00 --- 17 19 18 67.0 305.6 1.3 0.0 243 1046 05 18 31 05 23 30 J1605-1139 17 19 48 67.7 306.0 1.2 0.0 3 1046 05 23 30 05 24 40 =1602-115 17 20 58 67.5 305.5 1.2 0.0 70 1055 05 23 31 05 24 40 J1603-1007 17 20 58 66.1 307.5 1.3 0.0 -29 1055 No stop 05 29 10 =1600-099 17 25 29 65.3 305.7 1.3 0.0 241 1090 05 24 41 05 29 10 J1605-1139 17 25 29 66.6 303.6 1.3 0.0 -29 1090 No stop 05 31 00 =1602-115 17 27 19 66.3 302.9 1.3 0.0 81 1104 05 29 11 05 31 00 FRB190520 17 27 19 65.5 302.4 1.4 0.0 -27 1104 No stop 05 35 30 --- 17 31 50 64.6 300.8 1.5 0.0 243 1139 05 31 01 05 36 00 J1605-1139 17 32 20 65.3 301.0 1.4 0.0 3 1139 05 36 00 05 37 10 =1602-115 17 33 30 65.1 300.6 1.4 0.0 70 1148 05 36 01 05 37 10 FRB190520 17 33 30 64.3 300.2 1.5 0.0 -27 1148 No stop 05 41 40 --- 17 38 01 63.4 298.7 1.6 0.0 243 1183 05 37 11 05 41 40 J1605-1139 17 38 01 64.2 299.1 1.5 0.0 -27 1183 No stop 05 43 30 =1602-115 17 39 51 63.9 298.5 1.6 0.0 83 1197 05 41 41 05 43 30 FRB190520 17 39 51 63.0 298.1 1.6 0.0 -27 1197 No stop 05 48 00 --- 17 44 22 62.1 296.7 1.7 0.0 243 1232 05 43 31 05 48 30 J1605-1139 17 44 52 62.9 296.9 1.6 0.0 3 1232 05 48 30 05 49 40 =1602-115 17 46 02 62.6 296.5 1.7 0.0 70 1241 05 48 31 05 49 40 FRB190520 17 46 02 61.8 296.2 1.7 0.0 -27 1241 No stop 05 54 10 --- 17 50 33 60.9 294.9 1.8 0.0 243 1275 05 49 41 05 54 10 J1605-1139 17 50 33 61.7 295.2 1.7 0.0 -27 1275 No stop 05 56 00 =1602-115 17 52 23 61.4 294.7 1.8 0.0 83 1289 05 54 11 05 56 00 FRB190520 17 52 23 60.5 294.4 1.8 0.0 -27 1289 No stop 06 00 30 --- 17 56 54 59.6 293.2 1.9 0.0 243 1324 05 56 01 06 01 00 J1605-1139 17 57 24 60.3 293.3 1.8 0.0 3 1324 06 01 00 06 02 10 =1602-115 17 58 34 60.1 293.0 1.9 0.0 70 1333 06 01 01 06 02 10 J1603-1007 17 58 34 58.8 295.0 1.9 0.0 -29 1333 No stop 06 06 40 =1600-099 18 03 05 57.9 293.8 2.0 0.0 241 1368 06 02 11 Schedule for HART (Code Hh ) Page 6 Multi-freq study on FRB PRSs - FRB190520 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 ---------------------------------------------------------------------------------------- --- Fri 21 Feb 2025 Day 52 --- 06 06 40 J1605-1139 18 03 05 59.1 291.8 1.9 0.0 -29 1368 No stop 06 08 30 =1602-115 18 04 55 58.8 291.4 2.0 0.0 81 1382 06 06 41 06 08 30 FRB190520 18 04 55 57.9 291.2 2.0 0.0 -27 1382 No stop 06 13 00 --- 18 09 26 56.9 290.1 2.1 0.0 243 1417 06 08 31 06 13 30 J1605-1139 18 09 56 57.7 290.2 2.1 0.0 3 1417 06 13 30 06 14 40 =1602-115 18 11 06 57.5 289.9 2.1 0.0 70 1426 06 13 31 06 14 40 FRB190520 18 11 06 56.6 289.8 2.1 0.0 -27 1426 No stop 06 19 10 --- 18 15 37 55.6 288.8 2.2 0.0 243 1461 06 14 41 06 19 10 J1605-1139 18 15 37 56.5 288.9 2.1 0.0 -27 1461 No stop 06 21 00 =1602-115 18 17 27 56.1 288.5 2.2 0.0 83 1475 06 19 11 06 21 00 FRB190520 18 17 27 55.2 288.4 2.2 0.0 -27 1475 No stop 06 25 30 --- 18 21 58 54.3 287.4 2.3 0.0 243 1510 06 21 01 06 26 00 J1605-1139 18 22 28 55.0 287.4 2.3 0.0 3 1510 06 26 00 06 27 10 =1602-115 18 23 38 54.8 287.2 2.3 0.0 70 1519 06 26 01 06 27 10 FRB190520 18 23 38 53.9 287.1 2.3 0.0 -27 1519 No stop 06 31 40 --- 18 28 09 52.9 286.2 2.4 0.0 243 1554 06 27 11 06 31 40 J1605-1139 18 28 09 53.8 286.3 2.4 0.0 -27 1554 No stop 06 33 30 =1602-115 18 29 59 53.4 285.9 2.4 0.0 83 1568 06 31 41 06 33 30 FRB190520 18 29 59 52.5 285.9 2.4 0.0 -27 1568 No stop 06 38 00 --- 18 34 30 51.6 285.0 2.5 0.0 243 1603 06 33 31 06 38 30 J1605-1139 18 35 00 52.3 285.0 2.5 0.0 3 1603 06 38 30 06 39 40 =1602-115 18 36 10 52.1 284.8 2.5 0.0 70 1612 06 38 31 06 39 40 J1603-1007 18 36 10 50.9 286.6 2.5 0.0 -29 1612 No stop 06 44 10 =1600-099 18 40 41 49.9 285.8 2.6 0.0 241 1646 06 39 41 06 44 10 J1605-1139 18 40 41 51.1 284.0 2.6 0.0 -29 1646 No stop 06 46 00 =1602-115 18 42 31 50.7 283.7 2.6 0.0 81 1660 06 44 11 06 47 40 J1550+0527 18 44 12 37.8 300.6 2.9 0.0 39 1660 06 47 40 06 52 00 =1548+056 18 48 32 37.0 299.7 2.9 0.0 260 1694 06 47 41 Schedule for HART (Code Hh ) Page 7 Multi-freq study on FRB PRSs - FRB190520 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 ---------------------------------------------------------------------------------------- --- Fri 21 Feb 2025 Day 52 --- ---------- pulsar-check ---------- 06 56 00 B1933+16 18 52 33 46.4 15.5 -0.7 0.0 101 1694 06 56 00 07 00 00 --- 18 56 34 46.7 14.2 -0.7 0.0 240 1725 06 56 01 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess125.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) * FRB190520 15 59 18.982305 * 16 02 04.261100 16 03 27.434273 0.00 -11 08 58.91332 *-11 17 17.36600 -11 21 35.73777 0.00 From catalog imbedded in main SCHED input file. * B1933+16 19 33 31.814330 * 19 35 47.800000 19 36 55.036180 0.00 16 09 57.63427 * 16 16 39.90000 16 19 47.07888 0.00 From catalog imbedded in main SCHED input file. 1548+056 15 48 06.931007 * 15 50 35.269240 15 51 50.032969 0.01 * J1550+0527 05 36 11.23091 * 05 27 10.44845 05 22 24.72155 0.01 J1550+05 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 9440 observations. 1600-099 16 00 34.687412 * 16 03 18.778244 16 04 41.349112 0.13 * J1603-1007 -09 59 07.60341 *-10 07 21.29503 -10 11 37.72987 0.27 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 134 observations. 1602-115 16 02 31.767572 * 16 05 17.531656 16 06 40.929425 0.02 * J1605-1139 -11 31 20.63028 *-11 39 26.83112 -11 43 38.92690 0.04 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 2275 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 FRB190520 sess125.L1024 1 2 3 4 5 6 7 8 2.100 46.448 B1933+16 sess125.L1024 1 2 3 4 5 6 7 8 0.067 1.717 J1550+0527 sess125.L1024 1 2 3 4 5 6 7 8 0.228 5.812 J1603-1007 sess125.L1024 1 2 3 4 5 6 7 8 0.450 9.560 J1605-1139 sess125.L1024 1 2 3 4 5 6 7 8 0.875 16.275 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) FRB190520 91.7 B1933+16 48.2 J1550+0527 97.7 J1603-1007 91.6 J1605-1139 90.9 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