COVER INFORMATION Station: URUMQI (Code Ur ) Experiment: Exploring the jet in a z > 6 blazar DES J0322-18 Exp. Code: EL064B Schedule Version: 4.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: Tao An Address: Shanghai Astronomical Observatory 80th Nandan Road, Xuhui District Shanghai 200030 China Phone: +86-13261603255 EMAIL: antao@shao.ac.cn Fax: Phone during observation: Observing mode: VLBI Notes: # Please, make sure PHASE CAL is OFF # 1.4 GHz, dual polarisation, 1024 Mbps eVLBI, 6 hours at GST: J0322-18 Drafted by Yuanqi Liu Schedule for URUMQI (Code Ur ) Page 2 Exploring the jet in a z > 6 blazar DES J0322-18 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 3 Nov 2022 Day 307 --- Next scan frequencies: 1626.49 1626.49 1626.49 1626.49 1690.49 1690.49 1690.49 1690.49 Next BBC frequencies: 326.49 326.49 326.49 326.49 390.49 390.49 390.49 390.49 Next scan bandwidths: 32.00 32.00 32.00 32.00 32.00 32.00 32.00 32.00 19 00 00 J0006-0623 03 40 47 20.8 238.6 3.6 38.5 0 0 19 00 00 19 05 00 =0003-066 03 45 48 20.0 239.6 3.6 39.0 300 38 19 00 01 19 05 30 P0327-1803 03 46 18 28.4 184.7 0.3 3.6 -29 38 19 05 30 19 09 00 --- 03 49 49 28.4 185.7 0.4 4.3 181 65 19 05 31 19 09 00 J0322-18 03 49 49 27.6 187.1 0.4 5.4 -5 65 No stop 19 13 00 --- 03 53 49 27.5 188.2 0.5 6.2 235 96 19 09 01 19 13 00 P0327-1803 03 53 49 28.3 186.8 0.4 5.2 -5 96 No stop 19 14 30 --- 03 55 20 28.2 187.2 0.4 5.5 85 108 19 13 01 19 14 30 J0322-18 03 55 20 27.5 188.6 0.5 6.5 -5 108 No stop 19 18 30 --- 03 59 20 27.4 189.6 0.6 7.4 235 138 19 14 31 19 19 00 P0327-1803 03 59 50 28.1 188.4 0.5 6.4 25 138 19 19 00 19 20 00 --- 04 00 50 28.1 188.6 0.5 6.6 60 146 19 19 01 19 20 00 J0322-18 04 00 50 27.3 190.0 0.6 7.7 -5 146 No stop 19 24 00 --- 04 04 51 27.2 191.1 0.7 8.5 235 177 19 20 01 19 24 00 P0327-1803 04 04 51 28.0 189.7 0.6 7.4 -5 177 No stop 19 25 30 --- 04 06 21 27.9 190.1 0.6 7.7 85 188 19 24 01 19 25 30 J0322-18 04 06 21 27.1 191.5 0.7 8.8 -5 188 No stop 19 29 30 --- 04 10 22 27.0 192.5 0.8 9.6 235 219 19 25 31 19 30 00 P0327-1803 04 10 52 27.8 191.3 0.7 8.6 25 219 19 30 00 19 31 00 --- 04 11 52 27.8 191.6 0.7 8.8 60 227 19 30 01 19 31 00 J0322-18 04 11 52 26.9 192.9 0.8 9.9 -5 227 No stop 19 35 00 --- 04 15 53 26.8 194.0 0.9 10.7 235 258 19 31 01 19 35 00 P0327-1803 04 15 53 27.6 192.7 0.8 9.6 -5 258 No stop 19 36 30 --- 04 17 23 27.5 193.1 0.8 9.9 85 269 19 35 01 19 36 30 J0322-18 04 17 23 26.7 194.4 0.9 10.9 -5 269 No stop 19 40 30 --- 04 21 24 26.5 195.4 1.0 11.7 235 300 19 36 31 19 41 00 P0327-1803 04 21 54 27.4 194.2 0.9 10.8 25 300 19 41 00 19 42 00 --- 04 22 54 27.3 194.5 0.9 11.0 60 308 19 41 01 Schedule for URUMQI (Code Ur ) Page 3 Exploring the jet in a z > 6 blazar DES J0322-18 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 3 Nov 2022 Day 307 --- 19 42 00 J0322-18 04 22 54 26.4 195.8 1.0 12.0 -5 308 No stop 19 46 00 --- 04 26 55 26.2 196.8 1.1 12.8 235 338 19 42 01 19 46 00 P0327-1803 04 26 55 27.1 195.6 1.0 11.8 -5 338 No stop 19 47 30 --- 04 28 25 27.0 195.9 1.0 12.1 85 350 19 46 01 19 47 30 J0322-18 04 28 25 26.1 197.2 1.1 13.1 -5 350 No stop 19 51 30 --- 04 32 26 25.9 198.2 1.2 13.9 235 381 19 47 31 19 52 00 P0327-1803 04 32 56 26.8 197.1 1.1 13.0 25 381 19 52 00 19 53 00 --- 04 33 56 26.8 197.4 1.1 13.2 60 388 19 52 01 19 53 00 J0322-18 04 33 56 25.8 198.6 1.2 14.2 -5 388 No stop 19 57 00 --- 04 37 57 25.6 199.7 1.2 14.9 235 419 19 53 01 19 57 00 P0327-1803 04 37 57 26.5 198.4 1.2 14.0 -5 419 No stop 19 58 30 --- 04 39 27 26.4 198.8 1.2 14.2 85 431 19 57 01 19 58 30 J0322-18 04 39 27 25.5 200.0 1.3 15.2 -5 431 No stop 20 02 30 --- 04 43 27 25.3 201.0 1.3 16.0 235 462 19 58 31 20 03 00 P0327-1803 04 43 58 26.2 200.0 1.3 15.1 25 462 20 03 00 20 04 00 --- 04 44 58 26.1 200.2 1.3 15.3 60 469 20 03 01 20 04 00 J0322-18 04 44 58 25.2 201.4 1.4 16.2 -5 469 No stop 20 08 00 --- 04 48 58 24.9 202.4 1.4 17.0 235 500 20 04 01 20 08 00 P0327-1803 04 48 58 25.9 201.2 1.3 16.0 -5 500 No stop 20 09 30 --- 04 50 29 25.8 201.6 1.4 16.3 85 512 20 08 01 20 09 30 J0322-18 04 50 29 24.8 202.8 1.5 17.3 -5 512 No stop 20 13 30 --- 04 54 29 24.5 203.8 1.5 18.0 235 542 20 09 31 20 14 00 P0327-1803 04 54 59 25.4 202.8 1.4 17.2 25 542 20 14 00 20 15 00 --- 04 56 00 25.4 203.0 1.5 17.4 60 550 20 14 01 20 15 00 J0322-18 04 56 00 24.4 204.2 1.5 18.3 -5 550 No stop 20 19 00 --- 05 00 00 24.1 205.2 1.6 19.0 235 581 20 15 01 20 19 00 P0327-1803 05 00 00 25.1 204.0 1.5 18.1 -5 581 No stop 20 20 30 --- 05 01 30 25.0 204.4 1.5 18.4 85 592 20 19 01 20 20 30 J0322-18 05 01 30 24.0 205.5 1.6 19.3 -5 592 No stop 20 24 30 --- 05 05 31 23.6 206.5 1.7 20.0 235 623 20 20 31 Schedule for URUMQI (Code Ur ) Page 4 Exploring the jet in a z > 6 blazar DES J0322-18 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 3 Nov 2022 Day 307 --- 20 25 00 P0327-1803 05 06 01 24.6 205.5 1.6 19.2 25 623 20 25 00 20 26 00 --- 05 07 01 24.5 205.8 1.6 19.4 60 631 20 25 01 20 26 00 J0322-18 05 07 01 23.5 206.9 1.7 20.2 -5 631 No stop 20 30 00 --- 05 11 02 23.2 207.8 1.8 21.0 235 662 20 26 01 20 30 00 P0327-1803 05 11 02 24.2 206.7 1.7 20.1 -5 662 No stop 20 31 30 --- 05 12 32 24.1 207.1 1.7 20.4 85 673 20 30 01 20 31 30 J0322-18 05 12 32 23.1 208.2 1.8 21.2 -5 673 No stop 20 35 30 --- 05 16 33 22.7 209.2 1.9 21.9 235 704 20 31 31 20 36 00 P0327-1803 05 17 03 23.7 208.2 1.8 21.1 25 704 20 36 00 20 37 00 --- 05 18 03 23.6 208.5 1.8 21.3 60 712 20 36 01 20 37 00 J0322-18 05 18 03 22.6 209.5 1.9 22.2 -5 712 No stop 20 41 00 --- 05 22 04 22.2 210.5 2.0 22.8 235 742 20 37 01 20 41 00 P0327-1803 05 22 04 23.3 209.4 1.9 22.0 -5 742 No stop 20 42 30 --- 05 23 34 23.1 209.8 1.9 22.3 85 754 20 41 01 20 42 30 J0322-18 05 23 34 22.1 210.8 2.0 23.1 -5 754 No stop 20 46 30 --- 05 27 35 21.7 211.8 2.1 23.8 235 785 20 42 31 20 47 00 P0327-1803 05 28 05 22.7 210.9 2.0 23.0 25 785 20 47 00 20 48 00 --- 05 29 05 22.6 211.1 2.0 23.2 60 792 20 47 01 20 48 00 J0322-18 05 29 05 21.5 212.1 2.1 24.0 -5 792 No stop 20 52 00 --- 05 33 06 21.2 213.0 2.2 24.7 235 823 20 48 01 20 52 00 P0327-1803 05 33 06 22.3 212.0 2.1 23.9 -5 823 No stop 20 53 30 --- 05 34 36 22.1 212.4 2.1 24.1 85 835 20 52 01 20 53 30 J0322-18 05 34 36 21.0 213.4 2.2 24.9 -5 835 No stop 20 57 30 --- 05 38 36 20.6 214.3 2.3 25.6 235 865 20 53 31 20 58 00 P0327-1803 05 39 07 21.7 213.4 2.2 24.9 25 865 20 58 00 20 59 00 --- 05 40 07 21.6 213.7 2.2 25.0 60 873 20 58 01 20 59 00 J0322-18 05 40 07 20.4 214.7 2.3 25.8 -5 873 No stop 21 03 00 --- 05 44 07 20.0 215.6 2.3 26.4 235 904 20 59 01 21 03 00 P0327-1803 05 44 07 21.2 214.6 2.3 25.7 -5 904 No stop 21 04 30 --- 05 45 38 21.0 215.0 2.3 25.9 85 915 21 03 01 Schedule for URUMQI (Code Ur ) Page 5 Exploring the jet in a z > 6 blazar DES J0322-18 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 3 Nov 2022 Day 307 --- 21 04 30 J0322-18 05 45 38 19.9 215.9 2.4 26.7 -5 915 No stop 21 08 30 --- 05 49 38 19.4 216.8 2.4 27.3 235 946 21 04 31 21 09 00 P0327-1803 05 50 08 20.5 216.0 2.4 26.6 25 946 21 09 00 21 10 00 --- 05 51 09 20.4 216.2 2.4 26.8 60 954 21 09 01 21 10 00 J0322-18 05 51 09 19.3 217.1 2.5 27.5 -5 954 No stop 21 14 00 --- 05 55 09 18.8 218.0 2.5 28.1 235 985 21 10 01 21 14 00 P0327-1803 05 55 09 20.0 217.1 2.4 27.4 -5 985 No stop 21 15 30 --- 05 56 39 19.8 217.4 2.5 27.6 85 996 21 14 01 21 15 30 J0322-18 05 56 39 18.7 218.4 2.6 28.4 -5 996 No stop 21 19 30 --- 06 00 40 18.2 219.2 2.6 29.0 235 1027 21 15 31 21 20 00 P0327-1803 06 01 10 19.3 218.5 2.5 28.3 25 1027 21 20 00 21 21 00 --- 06 02 10 19.2 218.7 2.6 28.5 60 1035 21 20 01 21 21 00 J0322-18 06 02 10 18.0 219.6 2.6 29.2 -5 1035 No stop 21 25 00 --- 06 06 11 17.6 220.4 2.7 29.8 235 1065 21 21 01 21 25 00 P0327-1803 06 06 11 18.7 219.6 2.6 29.1 -5 1065 No stop 21 26 30 --- 06 07 41 18.6 219.9 2.6 29.3 85 1077 21 25 01 21 26 30 J0322-18 06 07 41 17.4 220.8 2.7 30.0 -5 1077 No stop 21 30 30 --- 06 11 42 16.9 221.6 2.8 30.6 235 1108 21 26 31 21 31 00 P0327-1803 06 12 12 18.0 220.9 2.7 30.0 25 1108 21 31 00 21 32 00 --- 06 13 12 17.9 221.1 2.7 30.1 60 1115 21 31 01 21 32 00 J0322-18 06 13 12 16.7 221.9 2.8 30.8 -5 1115 No stop 21 36 00 --- 06 17 13 16.2 222.8 2.9 31.3 235 1146 21 32 01 21 36 00 P0327-1803 06 17 13 17.4 222.0 2.8 30.7 -5 1146 No stop 21 37 30 --- 06 18 43 17.3 222.3 2.8 30.9 85 1158 21 36 01 21 37 30 J0322-18 06 18 43 16.0 223.1 2.9 31.5 -5 1158 No stop 21 41 30 --- 06 22 44 15.5 223.9 3.0 32.1 235 1188 21 37 31 21 42 00 P0327-1803 06 23 14 16.7 223.2 2.9 31.5 25 1188 21 42 00 21 43 00 --- 06 24 14 16.6 223.4 2.9 31.6 60 1196 21 42 01 21 43 00 J0322-18 06 24 14 15.4 224.3 3.0 32.3 -5 1196 No stop 21 47 00 --- 06 28 15 14.8 225.1 3.1 32.8 235 1227 21 43 01 Schedule for URUMQI (Code Ur ) Page 6 Exploring the jet in a z > 6 blazar DES J0322-18 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 3 Nov 2022 Day 307 --- 21 47 00 P0327-1803 06 28 15 16.1 224.3 3.0 32.2 -5 1227 No stop 21 48 30 --- 06 29 45 15.9 224.6 3.0 32.4 85 1238 21 47 01 21 48 30 J0322-18 06 29 45 14.7 225.4 3.1 33.0 -5 1238 No stop 21 52 30 --- 06 33 46 14.1 226.2 3.2 33.6 235 1269 21 48 31 21 53 00 P0327-1803 06 34 16 15.3 225.5 3.1 33.0 25 1269 21 53 00 21 54 00 --- 06 35 16 15.2 225.7 3.1 33.1 60 1277 21 53 01 21 54 00 J0322-18 06 35 16 13.9 226.5 3.2 33.8 -5 1277 No stop 21 58 00 --- 06 39 16 13.4 227.3 3.3 34.3 235 1308 21 54 01 21 58 00 P0327-1803 06 39 16 14.6 226.6 3.2 33.7 -5 1308 No stop 21 59 30 --- 06 40 47 14.4 226.9 3.2 33.8 85 1319 21 58 01 21 59 30 J0322-18 06 40 47 13.2 227.6 3.3 34.5 -6 1319 No stop 22 03 30 --- 06 44 47 12.7 228.4 3.4 35.0 234 1350 21 59 31 22 04 00 P0327-1803 06 45 17 13.8 227.8 3.3 34.4 25 1350 22 04 00 22 05 00 --- 06 46 18 13.7 228.0 3.3 34.5 60 1358 22 04 01 22 05 00 J0322-18 06 46 18 12.5 228.7 3.4 35.1 -6 1358 No stop 22 09 00 --- 06 50 18 11.9 229.5 3.5 35.6 234 1388 22 05 01 22 09 00 P0327-1803 06 50 18 13.2 228.8 3.4 35.0 -6 1388 No stop 22 10 30 --- 06 51 48 13.0 229.1 3.4 35.2 84 1400 22 09 01 22 10 30 J0322-18 06 51 48 11.7 229.8 3.5 35.8 -6 1400 No stop 22 14 30 --- 06 55 49 11.1 230.6 3.5 36.3 234 1431 22 10 31 22 15 00 P0327-1803 06 56 19 12.3 230.0 3.5 35.8 24 1431 22 15 00 22 16 00 --- 06 57 19 12.2 230.2 3.5 35.9 60 1438 22 15 01 22 16 00 J0322-18 06 57 19 10.9 230.9 3.6 36.5 -6 1438 No stop 22 20 00 --- 07 01 20 10.4 231.7 3.6 36.9 234 1469 22 16 01 22 20 00 P0327-1803 07 01 20 11.6 231.0 3.5 36.4 -6 1469 No stop 22 21 30 --- 07 02 50 11.4 231.3 3.6 36.5 84 1481 22 20 01 22 21 30 J0322-18 07 02 50 10.1 232.0 3.7 37.1 -6 1481 No stop 22 25 30 --- 07 06 51 9.6 232.7 3.7 37.5 234 1512 22 21 31 22 26 00 P0327-1803 07 07 21 10.8 232.2 3.6 37.0 24 1512 22 26 00 22 27 00 --- 07 08 21 10.6 232.3 3.7 37.2 60 1519 22 26 01 Schedule for URUMQI (Code Ur ) Page 7 Exploring the jet in a z > 6 blazar DES J0322-18 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 3 Nov 2022 Day 307 --- 22 31 00 P0327-1803 07 12 22 10.1 233.1 3.7 37.6 238 1519 22 31 00 22 32 30 --- 07 13 52 9.8 233.4 3.8 37.8 90 1531 22 31 01 22 37 00 P0327-1803 07 18 23 9.2 234.3 3.8 38.3 268 1531 22 37 00 22 38 00 --- 07 19 23 9.0 234.5 3.8 38.4 60 1538 22 37 01 22 49 00 J0237+2848 07 30 25 31.4 281.7 4.9 54.3 609 1538 22 49 00 22 54 00 =0234+285 07 35 26 30.5 282.4 4.9 54.1 300 1577 22 49 01 --- Fri 4 Nov 2022 Day 308 --- 00 54 00 J0237+2848 09 35 45 10.2 300.4 6.9 45.7 7197 1577 00 54 00 01 00 00 =0234+285 09 41 46 9.3 301.3 7.0 45.1 360 1623 00 54 01 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess322.L1024 --- 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: 11 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= 1300.00 1300.00 1300.00 1300.00 1300.00 1300.00 1300.00 1300.00 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= 1626.49 1626.49 1626.49 1626.49 1690.49 1690.49 1690.49 1690.49 BBC fr= 326.49 326.49 326.49 326.49 390.49 390.49 390.49 390.49 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) * J0322-18 03 19 58.268882 * 03 22 14.549000 03 23 17.592871 0.00 -18 51 58.03562 *-18 41 17.47800 -18 36 18.98498 0.00 From catalog imbedded in main SCHED input file. * P0327-1803 03 25 26.764400 * 03 27 43.341600 03 28 46.506554 0.00 -18 14 03.97885 *-18 03 42.02800 -17 58 51.74577 0.00 From catalog imbedded in main SCHED input file. 0003-066 00 03 40.288767 * 00 06 13.892888 00 07 24.259850 0.00 * J0006-0623 -06 40 17.29995 *-06 23 35.33538 -06 15 58.11474 0.01 J0006-06 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 38365 observations. 0234+285 02 34 55.589590 * 02 37 52.405677 02 39 13.758997 0.00 * J0237+2848 28 35 11.40773 * 28 48 08.98999 28 54 08.07893 0.00 J0237+28 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 58420 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 J0322-18 sess322.L1024 1 2 3 4 5 6 7 8 9 10 11 12 + 4.067 237.381 P0327-1803 sess322.L1024 1 2 3 4 5 6 7 8 9 10 11 12 + 1.400 70.801 J0006-0623 sess322.L1024 1 2 3 4 5 6 7 8 9 10 11 12 0.083 10.000 J0237+2848 sess322.L1024 1 2 3 4 5 6 7 8 9 10 11 12 0.183 9.543 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) J0322-18 144.2 P0327-1803 144.3 J0006-0623 137.3 J0237+2848 166.4 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