COVER INFORMATION Station: TIANMA65 (Code T6 ) Experiment: Effelsberg linear pol. wideband receiver test Exp. Code: FR064 Schedule Version: 2.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: Benito Marcote Address: JIVE Oude Hoogeveensedijk 4 7991PD Dwingeloo The Netherlands Phone: +31 521 596 508 EMAIL: marcote@jive.eu Fax: Phone during observation: +31 521 596 508 Observing mode: Notes: Test between Ef (linear and circular) receivers 2048 Mbps, L+R, 2-bit sampling, 32 MHz filters COVER LETTER: This is a test for how the wideband receiver at Effelsberg behaves when compared to the traditional receiver. The antenna will switch from one to another and we will compare the sensitivity and how PolConvert works (the wideband receiver uses linears). The schedule contains blocks of 30 min (with a 2-min gap in between), where Effelsberg will switch receivers. The bright source J0359+5057 will be used as fringe-finder and main calibrator. The source J0350+5138 (~50 mJy at 1.6 deg) will be used as phase-referenced target. This will allow us to verify how the PolConvert terms are converted in phase-referencing. Schedule for TIANMA65 (Code T6 ) Page 2 Effelsberg linear pol. wideband receiver test 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 ---------------------------------------------------------------------------------------- --- Tue 14 Jun 2022 Day 165 --- ---------- Change receiver ---------- Next scan frequencies: 4830.49 4830.49 4830.49 4830.49 4894.49 4894.49 4894.49 4894.49 4958.49 4958.49 4958.49 4958.49 5022.49 5022.49 5022.49 5022.49 Next BBC frequencies: 630.49 630.49 630.49 630.49 694.49 694.49 694.49 694.49 758.49 758.49 758.49 758.49 822.49 822.49 822.49 822.49 Next scan bandwidths: 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 06 19 30 J0359+5057 07 54 11 43.2 -47.2 3.9 92.0 0 0 06 19 30 06 21 30 =NRAO150 07 56 12 42.9 -47.2 3.9 91.6 120 31 06 19 31 06 21 30 J0350+5138 07 56 12 41.5 -46.4 4.1 90.4 -8 31 No stop 06 25 00 =0346+514 07 59 42 40.9 -46.4 4.1 89.7 202 85 06 21 31 06 25 00 J0359+5057 07 59 42 42.4 -47.3 4.0 90.9 -8 85 No stop 06 27 00 =NRAO150 08 01 43 42.0 -47.3 4.0 90.5 112 116 06 25 01 06 27 00 J0350+5138 08 01 43 40.6 -46.3 4.2 89.3 -8 116 No stop 06 30 30 =0346+514 08 05 13 40.1 -46.3 4.2 88.7 202 170 06 27 01 06 31 00 J0359+5057 08 05 43 41.4 -47.3 4.1 89.7 22 170 06 31 00 06 32 30 =NRAO150 08 07 13 41.2 -47.3 4.1 89.4 90 193 06 31 01 06 32 30 J0350+5138 08 07 13 39.8 -46.3 4.3 88.3 -8 193 No stop 06 36 00 =0346+514 08 10 44 39.2 -46.3 4.3 87.6 202 247 06 32 31 06 36 00 J0359+5057 08 10 44 40.6 -47.3 4.2 88.8 -8 247 No stop 06 38 00 =NRAO150 08 12 44 40.3 -47.2 4.2 88.4 112 278 06 36 01 06 38 00 J0350+5138 08 12 44 38.9 -46.3 4.3 87.2 -8 278 No stop 06 41 30 =0346+514 08 16 15 38.4 -46.2 4.4 86.6 202 332 06 38 01 06 42 00 J0359+5057 08 16 45 39.7 -47.2 4.3 87.6 23 332 06 42 00 06 46 30 =NRAO150 08 21 16 39.0 -47.2 4.3 86.8 270 402 06 42 01 ---------- Change receiver ---------- 06 52 30 J0359+5057 08 27 17 38.0 -47.1 4.4 85.6 358 402 06 52 30 06 54 30 =NRAO150 08 29 17 37.7 -47.1 4.5 85.3 120 433 06 52 31 06 54 30 J0350+5138 08 29 17 36.4 -46.0 4.6 84.1 -7 433 No stop 06 58 00 =0346+514 08 32 48 35.8 -46.0 4.7 83.5 203 487 06 54 31 06 58 00 J0359+5057 08 32 48 37.2 -47.0 4.5 84.6 -7 487 No stop 07 00 00 =NRAO150 08 34 48 36.8 -47.0 4.6 84.3 113 518 06 58 01 Schedule for TIANMA65 (Code T6 ) Page 3 Effelsberg linear pol. wideband receiver test 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 ---------------------------------------------------------------------------------------- --- Tue 14 Jun 2022 Day 165 --- 07 00 00 J0350+5138 08 34 48 35.5 -45.9 4.7 83.1 -7 518 No stop 07 03 30 =0346+514 08 38 19 35.0 -45.8 4.8 82.5 203 572 07 00 01 07 04 00 J0359+5057 08 38 49 36.2 -46.9 4.6 83.5 23 572 07 04 00 07 05 30 =NRAO150 08 40 19 36.0 -46.8 4.7 83.3 90 595 07 04 01 07 05 30 J0350+5138 08 40 19 34.7 -45.8 4.8 82.1 -7 595 No stop 07 09 00 =0346+514 08 43 49 34.1 -45.7 4.9 81.5 203 649 07 05 31 07 09 00 J0359+5057 08 43 49 35.4 -46.8 4.7 82.6 -7 649 No stop 07 11 00 =NRAO150 08 45 50 35.1 -46.7 4.7 82.3 113 680 07 09 01 07 11 00 J0350+5138 08 45 50 33.8 -45.6 4.9 81.1 -7 680 No stop 07 14 30 =0346+514 08 49 20 33.3 -45.5 5.0 80.5 203 734 07 11 01 07 15 00 J0359+5057 08 49 50 34.5 -46.6 4.8 81.6 23 734 07 15 00 07 19 30 =NRAO150 08 54 21 33.8 -46.5 4.9 80.7 270 804 07 15 01 ---------- Change receiver ---------- 07 26 00 J0359+5057 09 00 52 32.8 -46.3 5.0 79.6 388 804 07 26 00 07 28 00 =NRAO150 09 02 53 32.5 -46.2 5.0 79.2 120 835 07 26 01 07 28 00 J0350+5138 09 02 53 31.2 -45.1 5.2 78.1 -7 835 No stop 07 31 30 =0346+514 09 06 23 30.7 -44.9 5.2 77.4 203 889 07 28 01 07 31 30 J0359+5057 09 06 23 31.9 -46.1 5.1 78.6 -7 889 No stop 07 33 30 =NRAO150 09 08 23 31.6 -46.0 5.1 78.3 113 920 07 31 31 07 33 30 J0350+5138 09 08 23 30.4 -44.9 5.3 77.1 -7 920 No stop 07 37 00 =0346+514 09 11 54 29.9 -44.7 5.3 76.5 203 974 07 33 31 07 37 30 J0359+5057 09 12 24 31.0 -45.8 5.2 77.6 23 974 07 37 30 07 39 00 =NRAO150 09 13 54 30.8 -45.8 5.2 77.3 90 997 07 37 31 07 39 00 J0350+5138 09 13 54 29.6 -44.6 5.4 76.1 -7 997 No stop 07 42 30 =0346+514 09 17 25 29.0 -44.5 5.4 75.5 203 1051 07 39 01 07 42 30 J0359+5057 09 17 25 30.2 -45.6 5.3 76.7 -7 1051 No stop 07 44 30 =NRAO150 09 19 25 29.9 -45.5 5.3 76.4 113 1082 07 42 31 07 44 30 J0350+5138 09 19 25 28.7 -44.4 5.5 75.2 -7 1082 No stop 07 48 00 =0346+514 09 22 56 28.2 -44.2 5.5 74.5 203 1136 07 44 31 Schedule for TIANMA65 (Code T6 ) Page 4 Effelsberg linear pol. wideband receiver test 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 ---------------------------------------------------------------------------------------- --- Tue 14 Jun 2022 Day 165 --- 07 48 30 J0359+5057 09 23 26 29.3 -45.4 5.4 75.7 23 1136 07 48 30 07 53 00 =NRAO150 09 27 57 28.6 -45.2 5.4 74.9 270 1206 07 48 31 ---------- Change receiver ---------- 07 59 00 J0359+5057 09 33 58 27.7 -44.9 5.5 73.9 358 1206 07 59 00 08 01 00 =NRAO150 09 35 58 27.4 -44.8 5.6 73.5 120 1237 07 59 01 08 01 00 J0350+5138 09 35 58 26.3 -43.6 5.7 72.3 -7 1237 No stop 08 04 30 =0346+514 09 39 29 25.7 -43.4 5.8 71.7 203 1291 08 01 01 08 04 30 J0359+5057 09 39 29 26.9 -44.6 5.6 72.9 -7 1291 No stop 08 06 30 =NRAO150 09 41 29 26.6 -44.5 5.7 72.6 113 1322 08 04 31 08 06 30 J0350+5138 09 41 29 25.5 -43.3 5.8 71.3 -7 1322 No stop 08 10 00 =0346+514 09 44 59 24.9 -43.1 5.9 70.7 203 1376 08 06 31 08 10 30 J0359+5057 09 45 30 26.0 -44.3 5.7 71.9 24 1376 08 10 30 08 12 00 =NRAO150 09 47 00 25.8 -44.2 5.8 71.6 90 1399 08 10 31 08 12 00 J0350+5138 09 47 00 24.6 -43.0 5.9 70.4 -7 1399 No stop 08 15 30 =0346+514 09 50 30 24.1 -42.8 6.0 69.8 203 1453 08 12 01 08 15 30 J0359+5057 09 50 30 25.2 -44.0 5.8 71.0 -6 1453 No stop 08 17 30 =NRAO150 09 52 31 24.9 -43.9 5.9 70.7 114 1484 08 15 31 08 17 30 J0350+5138 09 52 31 23.8 -42.6 6.0 69.4 -6 1484 No stop 08 21 00 =0346+514 09 56 01 23.3 -42.4 6.1 68.8 204 1538 08 17 31 08 21 30 J0359+5057 09 56 31 24.3 -43.6 5.9 70.0 24 1538 08 21 30 08 26 00 =NRAO150 10 01 02 23.7 -43.4 6.0 69.2 270 1608 08 21 31 ---------- Change receiver ---------- 08 32 30 J0359+5057 10 07 33 22.7 -43.0 6.1 68.1 388 1608 08 32 30 08 34 30 =NRAO150 10 09 33 22.4 -42.8 6.1 67.8 120 1639 08 32 31 08 34 30 J0350+5138 10 09 33 21.4 -41.6 6.3 66.5 -6 1639 No stop 08 38 00 =0346+514 10 13 04 20.9 -41.3 6.4 65.9 204 1693 08 34 31 08 38 00 J0359+5057 10 13 04 21.9 -42.6 6.2 67.2 -6 1693 No stop 08 40 00 =NRAO150 10 15 04 21.6 -42.5 6.2 66.9 114 1724 08 38 01 08 40 00 J0350+5138 10 15 04 20.6 -41.2 6.4 65.5 -6 1724 No stop 08 43 30 =0346+514 10 18 35 20.1 -41.0 6.4 64.9 204 1778 08 40 01 Schedule for TIANMA65 (Code T6 ) Page 5 Effelsberg linear pol. wideband receiver test 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 ---------------------------------------------------------------------------------------- --- Tue 14 Jun 2022 Day 165 --- 08 44 00 J0359+5057 10 19 05 21.1 -42.2 6.3 66.2 24 1778 08 44 00 08 45 30 =NRAO150 10 20 35 20.8 -42.1 6.3 65.9 90 1801 08 44 01 08 45 30 J0350+5138 10 20 35 19.8 -40.8 6.5 64.6 -6 1801 No stop 08 49 00 =0346+514 10 24 06 19.4 -40.6 6.5 64.0 204 1855 08 45 31 08 49 00 J0359+5057 10 24 06 20.3 -41.9 6.4 65.3 -6 1855 No stop 08 51 00 =NRAO150 10 26 06 20.1 -41.7 6.4 65.0 114 1886 08 49 01 08 51 00 J0350+5138 10 26 06 19.1 -40.4 6.6 63.6 -6 1886 No stop 08 54 30 =0346+514 10 29 37 18.6 -40.2 6.6 63.0 204 1940 08 51 01 08 55 00 J0359+5057 10 30 07 19.5 -41.4 6.5 64.3 24 1940 08 55 00 08 59 30 =NRAO150 10 34 38 18.8 -41.1 6.6 63.5 270 2010 08 55 01 ---------- Change receiver ---------- 09 05 30 J0359+5057 10 40 39 18.0 -40.7 6.7 62.5 358 2010 09 05 30 09 07 30 =NRAO150 10 42 39 17.7 -40.5 6.7 62.2 120 2040 09 05 31 09 07 30 J0350+5138 10 42 39 16.8 -39.2 6.8 60.8 -6 2040 No stop 09 11 00 =0346+514 10 46 09 16.3 -38.9 6.9 60.2 204 2095 09 07 31 09 11 00 J0359+5057 10 46 09 17.2 -40.2 6.8 61.6 -6 2095 No stop 09 13 00 =NRAO150 10 48 10 17.0 -40.1 6.8 61.2 114 2126 09 11 01 09 13 00 J0350+5138 10 48 10 16.1 -38.7 6.9 59.8 -6 2126 No stop 09 16 30 =0346+514 10 51 40 15.6 -38.4 7.0 59.2 204 2180 09 13 01 09 17 00 J0359+5057 10 52 10 16.4 -39.8 6.9 60.5 24 2180 09 17 00 09 18 30 =NRAO150 10 53 41 16.2 -39.6 6.9 60.3 90 2203 09 17 01 09 18 30 J0350+5138 10 53 41 15.3 -38.3 7.0 58.9 -6 2203 No stop 09 22 00 =0346+514 10 57 11 14.9 -38.0 7.1 58.3 204 2257 09 18 31 09 22 00 J0359+5057 10 57 11 15.7 -39.3 6.9 59.7 -5 2257 No stop 09 24 00 =NRAO150 10 59 12 15.5 -39.2 7.0 59.3 115 2288 09 22 01 09 24 00 J0350+5138 10 59 12 14.6 -37.8 7.1 57.9 -5 2288 No stop 09 27 30 =0346+514 11 02 42 14.1 -37.5 7.2 57.3 205 2342 09 24 01 09 28 00 J0359+5057 11 03 12 14.9 -38.8 7.0 58.6 25 2342 09 28 00 09 32 30 =NRAO150 11 07 43 14.3 -38.5 7.1 57.9 270 2411 09 28 01 Schedule for TIANMA65 (Code T6 ) Page 6 Effelsberg linear pol. wideband receiver test 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 ---------------------------------------------------------------------------------------- --- Tue 14 Jun 2022 Day 165 --- ---------- Change receiver ---------- 09 40 30 J1824+5651 11 15 44 17.1 33.1 -7.1 -58.9 336 2411 09 40 30 09 47 30 =1823+568 11 22 45 17.9 33.6 -7.0 -60.2 420 2520 09 40 31 ---------- Change receiver ---------- 09 59 30 J1824+5651 11 34 47 19.4 34.5 -6.8 -62.4 718 2520 09 59 30 10 06 30 =1823+568 11 41 49 20.2 34.9 -6.7 -63.7 420 2628 09 59 31 10 08 30 J2022+6136 11 43 49 11.3 21.9 -8.6 -42.2 82 2628 10 08 30 10 15 30 =2021+614 11 50 50 11.8 22.5 -8.5 -43.6 420 2736 10 08 31 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess222.C2048class --- 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: 10 Station: TIANMA65 Total bit rate: 2048 Format: VDIF Bits per sample: 2 Sample rate: 64.000 Number of channels: 16 DBE type: DBBC_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 Net SB= L L U U L L U U L L U U L L U U IF SB = U U U U U U U U U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 5 1 5 2 6 2 6 3 7 3 7 4 8 4 8 BBC SB= L L U U L L U U L L U U L L U U IF = A4 B3 A4 B3 A4 B3 A4 B3 A4 B3 A4 B3 A4 B3 A4 B3 The following frequency sets based on these setups were used. Frequency Set: 21 Setup file default. Used with PCAL = off LO sum= 4830.49 4830.49 4830.49 4830.49 4894.49 4894.49 4894.49 4894.49 4958.49 4958.49 4958.49 4958.49 5022.49 5022.49 5022.49 5022.49 BBC fr= 630.49 630.49 630.49 630.49 694.49 694.49 694.49 694.49 758.49 758.49 758.49 758.49 822.49 822.49 822.49 822.49 Bandwd= 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 Matching frequency sets: 21 Track assignments are: track1= 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 barrel=roll_off ======== Setup file: sess222.C2048wide --- 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: 21 Station: TIANMA65 Total bit rate: 2048 Format: VDIF Bits per sample: 2 Sample rate: 64.000 Number of channels: 16 DBE type: DBBC_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 4200.00 Net SB= L L U U L L U U L L U U L L U U IF SB = U U U U U U U U U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 5 1 5 2 6 2 6 3 7 3 7 4 8 4 8 BBC SB= L L U U L L U U L L U U L L U U IF = A4 B3 A4 B3 A4 B3 A4 B3 A4 B3 A4 B3 A4 B3 A4 B3 The following frequency sets based on these setups were used. Frequency Set: 22 Setup file default. Used with PCAL = off LO sum= 4830.49 4830.49 4830.49 4830.49 4894.49 4894.49 4894.49 4894.49 4958.49 4958.49 4958.49 4958.49 5022.49 5022.49 5022.49 5022.49 BBC fr= 630.49 630.49 630.49 630.49 694.49 694.49 694.49 694.49 758.49 758.49 758.49 758.49 822.49 822.49 822.49 822.49 Bandwd= 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 Matching frequency sets: 22 Track assignments are: track1= 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) 0346+514 03 46 40.589539 * 03 50 25.051441 03 52 02.793057 0.35 * J0350+5138 51 29 35.10779 * 51 38 38.73447 51 42 32.51416 0.18 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 105 observations. NRAO150 03 55 45.261365 * 03 59 29.747266 04 01 07.485659 0.03 * J0359+5057 50 49 20.28574 * 50 57 50.16169 51 01 29.58444 0.02 0355+508 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc J0359+50 GSFC 2016a X/S astro solution, 22807 observations. 1823+568 18 23 14.951498 * 18 24 07.068376 18 24 32.480226 0.01 * J1824+5651 56 49 18.07201 * 56 51 01.49082 56 51 39.14514 0.01 J1824+56 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 9435 observations. 2021+614 20 21 13.300235 * 20 22 06.681753 20 22 31.932411 0.03 * J2022+6136 61 27 18.15575 * 61 36 58.80476 61 41 00.82104 0.02 J2022+61 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 3102 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 J0350+5138 sess222.C2048class 1 2 3 4 5 6 7 8 9 10 21 0.817 38.968 sess222.C2048wide 11 12 13 14 15 16 17 18 19 + 0.817 37.821 J0359+5057 sess222.C2048class 1 2 3 4 5 6 7 8 9 10 21 0.742 36.355 sess222.C2048wide 11 12 13 14 15 16 17 18 19 + 0.742 35.974 J1824+5651 sess222.C2048class 1 2 3 4 5 6 7 8 9 10 21 0.350 14.638 sess222.C2048wide 11 12 13 14 15 16 17 18 19 + 0.350 14.700 J2022+6136 sess222.C2048class 1 2 3 4 5 6 7 8 9 10 0.350 14.700 sess222.C2048wide 11 12 13 14 15 16 17 18 19 + 0.350 15.750 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) J0350+5138 34.2 J0359+5057 32.7 J1824+5651 99.1 J2022+6136 88.3 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