COVER INFORMATION Station: BADARY (Code Bd ) Experiment: NGC1068-K Exp. Code: EY036B Schedule Version: 3.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: Xiaolong Yang Address: Shanghai Astronomical Observatory 80 Nandan Road Shanghai CHINA Phone: +86 18810844136 EMAIL: yangxl@shao.ac.cn Fax: Phone during observation: +86 18810844136 Observing mode: realtime e-vlbi Notes: PI: Tao An, Shanghai Astronomical Observatory 2048 Mbps, RCP & LCP, 2 bit sampling Schedule for BADARY (Code Bd ) Page 2 NGC1068-K 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 16 Mar 2021 Day 75 --- Next scan frequencies: 22139.49 22139.49 22139.49 22139.49 22203.49 22203.49 22203.49 22203.49 22267.49 22267.49 22267.49 22267.49 22331.49 22331.49 22331.49 22331.49 Next BBC frequencies: 219.49 219.49 219.49 219.49 283.49 283.49 283.49 283.49 347.49 347.49 347.49 347.49 411.49 411.49 411.49 411.49 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 11 00 00 0234+285 05 25 58 51.6 609.8 2.8 41.6 0 0 11 00 00 11 04 00 --- 05 29 59 51.0 610.9 2.8 41.9 240 62 11 00 01 11 06 00 J0243+0121 05 31 59 28.7 589.5 2.8 28.1 61 62 11 06 00 11 08 00 --- 05 33 59 28.5 590.0 2.8 28.3 120 92 11 06 01 11 08 00 NGC1068 05 33 59 27.2 589.5 2.8 28.1 -15 92 No stop 11 09 35 --- 05 35 35 27.0 589.9 2.9 28.2 80 117 11 08 01 11 09 35 J0243+0121 05 35 35 28.3 590.4 2.8 28.5 -15 117 No stop 11 11 05 --- 05 37 05 28.1 590.8 2.9 28.6 75 140 11 09 36 11 11 05 NGC1068 05 37 05 26.8 590.3 2.9 28.4 -15 140 No stop 11 12 40 --- 05 38 40 26.6 590.7 2.9 28.6 80 164 11 11 06 11 12 40 J0243+0121 05 38 40 27.9 591.1 2.9 28.8 -15 164 No stop 11 14 10 --- 05 40 10 27.8 591.5 2.9 29.0 75 187 11 12 41 11 14 10 NGC1068 05 40 10 26.4 591.0 2.9 28.8 -15 187 No stop 11 15 45 --- 05 41 46 26.3 591.4 3.0 28.9 80 212 11 14 11 11 16 25 J0243+0121 05 42 26 27.5 592.1 3.0 29.2 25 212 11 16 25 11 17 25 --- 05 43 26 27.4 592.3 3.0 29.3 60 227 11 16 26 11 17 25 NGC1068 05 43 26 26.0 591.8 3.0 29.1 -15 227 No stop 11 19 00 --- 05 45 01 25.9 592.2 3.0 29.3 80 251 11 17 26 11 19 00 J0243+0121 05 45 01 27.2 592.7 3.0 29.5 -15 251 No stop 11 20 30 --- 05 46 32 27.0 593.1 3.0 29.7 75 274 11 19 01 11 20 30 NGC1068 05 46 32 25.7 592.6 3.0 29.4 -15 274 No stop 11 22 05 --- 05 48 07 25.5 592.9 3.1 29.6 80 299 11 20 31 11 22 05 J0243+0121 05 48 07 26.8 593.5 3.1 29.8 -15 299 No stop 11 23 35 --- 05 49 37 26.6 593.8 3.1 30.0 75 322 11 22 06 11 23 35 NGC1068 05 49 37 25.3 593.3 3.1 29.7 -15 322 No stop 11 25 10 --- 05 51 12 25.1 593.7 3.1 29.9 80 346 11 23 36 Schedule for BADARY (Code Bd ) Page 3 NGC1068-K 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 16 Mar 2021 Day 75 --- 11 25 50 J0243+0121 05 51 52 26.3 594.4 3.1 30.2 25 346 11 25 50 11 26 50 --- 05 52 53 26.2 594.6 3.1 30.3 60 362 11 25 51 11 26 50 NGC1068 05 52 53 24.9 594.1 3.2 30.1 -15 362 No stop 11 28 25 --- 05 54 28 24.7 594.5 3.2 30.2 80 386 11 26 51 11 28 25 J0243+0121 05 54 28 26.0 595.0 3.2 30.5 -15 386 No stop 11 29 55 --- 05 55 58 25.8 595.4 3.2 30.6 75 409 11 28 26 11 29 55 NGC1068 05 55 58 24.5 594.8 3.2 30.4 -15 409 No stop 11 31 30 --- 05 57 33 24.3 595.2 3.2 30.5 80 433 11 29 56 11 31 30 J0243+0121 05 57 33 25.6 595.7 3.2 30.8 -15 433 No stop 11 33 00 --- 05 59 04 25.4 596.1 3.2 30.9 75 456 11 31 31 11 33 00 NGC1068 05 59 04 24.1 595.6 3.3 30.7 -15 456 No stop 11 34 35 --- 06 00 39 23.9 595.9 3.3 30.8 80 481 11 33 01 11 35 15 J0243+0121 06 01 19 25.1 596.6 3.3 31.1 25 481 11 35 15 11 36 15 --- 06 02 19 25.0 596.9 3.3 31.2 60 496 11 35 16 11 36 15 NGC1068 06 02 19 23.7 596.3 3.3 31.0 -15 496 No stop 11 37 50 --- 06 03 54 23.5 596.7 3.3 31.1 80 521 11 36 16 11 37 50 J0243+0121 06 03 54 24.8 597.2 3.3 31.4 -15 521 No stop 11 39 20 --- 06 05 25 24.6 597.6 3.3 31.5 75 544 11 37 51 11 39 20 NGC1068 06 05 25 23.3 597.0 3.4 31.3 -15 544 No stop 11 40 55 --- 06 07 00 23.1 597.4 3.4 31.4 80 568 11 39 21 11 40 55 J0243+0121 06 07 00 24.4 598.0 3.4 31.6 -15 568 No stop 11 42 25 --- 06 08 30 24.2 598.3 3.4 31.8 75 591 11 40 56 11 42 25 NGC1068 06 08 30 22.9 597.8 3.4 31.6 -15 591 No stop 11 44 00 --- 06 10 05 22.7 598.1 3.4 31.7 80 615 11 42 26 11 44 40 J0243+0121 06 10 46 23.9 598.8 3.4 32.0 25 615 11 44 40 11 45 40 --- 06 11 46 23.7 599.1 3.5 32.1 60 631 11 44 41 11 45 40 NGC1068 06 11 46 22.5 598.5 3.5 31.8 -15 631 No stop 11 47 10 --- 06 13 16 22.3 598.9 3.5 32.0 75 654 11 45 41 11 47 10 J0243+0121 06 13 16 23.5 599.4 3.5 32.2 -15 654 No stop 11 48 40 --- 06 14 46 23.3 599.8 3.5 32.3 75 677 11 47 11 Schedule for BADARY (Code Bd ) Page 4 NGC1068-K 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 16 Mar 2021 Day 75 --- 11 48 40 NGC1068 06 14 46 22.1 599.2 3.5 32.1 -15 677 No stop 11 50 10 --- 06 16 16 21.9 599.5 3.5 32.2 75 700 11 48 41 11 50 10 J0243+0121 06 16 16 23.1 600.1 3.5 32.5 -15 700 No stop 11 51 40 --- 06 17 47 22.9 600.5 3.6 32.6 75 723 11 50 11 11 51 40 NGC1068 06 17 47 21.7 599.9 3.6 32.4 -15 723 No stop 11 53 10 --- 06 19 17 21.5 600.2 3.6 32.5 75 746 11 51 41 11 53 50 J0243+0121 06 19 57 22.6 600.9 3.6 32.8 25 746 11 53 50 11 54 50 --- 06 20 57 22.5 601.2 3.6 32.8 60 762 11 53 51 11 54 50 NGC1068 06 20 57 21.2 600.6 3.6 32.6 -15 762 No stop 11 56 20 --- 06 22 27 21.0 600.9 3.6 32.7 75 785 11 54 51 11 56 20 J0243+0121 06 22 27 22.3 601.5 3.6 33.0 -15 785 No stop 11 57 50 --- 06 23 58 22.1 601.9 3.7 33.1 75 808 11 56 21 11 57 50 NGC1068 06 23 58 20.8 601.3 3.7 32.9 -15 808 No stop 11 59 20 --- 06 25 28 20.6 601.6 3.7 33.0 75 831 11 57 51 11 59 20 J0243+0121 06 25 28 21.9 602.2 3.7 33.2 -15 831 No stop 12 00 50 --- 06 26 58 21.7 602.5 3.7 33.3 75 854 11 59 21 12 00 50 NGC1068 06 26 58 20.4 602.0 3.7 33.1 -15 854 No stop 12 02 20 --- 06 28 28 20.2 602.3 3.7 33.2 75 877 12 00 51 12 03 00 J0243+0121 06 29 09 21.4 603.0 3.7 33.5 25 877 12 03 00 12 04 00 --- 06 30 09 21.3 603.2 3.8 33.6 60 892 12 03 01 12 04 00 NGC1068 06 30 09 20.0 602.7 3.8 33.3 -15 892 No stop 12 05 30 --- 06 31 39 19.8 603.0 3.8 33.5 75 915 12 04 01 12 05 30 J0243+0121 06 31 39 21.0 603.6 3.8 33.7 -15 915 No stop 12 07 00 --- 06 33 09 20.8 603.9 3.8 33.8 75 938 12 05 31 12 07 00 NGC1068 06 33 09 19.6 603.3 3.8 33.6 -15 938 No stop 12 08 30 --- 06 34 39 19.4 603.7 3.8 33.7 75 962 12 07 01 12 08 30 J0243+0121 06 34 39 20.6 604.3 3.8 33.9 -15 962 No stop 12 10 00 --- 06 36 10 20.4 604.6 3.9 34.0 75 985 12 08 31 12 10 00 NGC1068 06 36 10 19.1 604.0 3.9 33.8 -15 985 No stop 12 11 30 --- 06 37 40 18.9 604.3 3.9 33.9 75 1008 12 10 01 Schedule for BADARY (Code Bd ) Page 5 NGC1068-K 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 16 Mar 2021 Day 75 --- 12 12 10 J0243+0121 06 38 20 20.1 605.1 3.9 34.1 25 1008 12 12 10 12 13 10 --- 06 39 20 20.0 605.3 3.9 34.2 60 1023 12 12 11 12 13 10 NGC1068 06 39 20 18.7 604.7 3.9 34.0 -15 1023 No stop 12 14 40 --- 06 40 50 18.5 605.0 4.0 34.1 75 1046 12 13 11 12 14 40 J0243+0121 06 40 50 19.8 605.6 3.9 34.3 -15 1046 No stop 12 16 10 --- 06 42 21 19.5 605.9 4.0 34.4 75 1069 12 14 41 12 16 10 NGC1068 06 42 21 18.3 605.3 4.0 34.2 -15 1069 No stop 12 17 40 --- 06 43 51 18.1 605.7 4.0 34.3 75 1092 12 16 11 12 17 40 J0243+0121 06 43 51 19.3 606.3 4.0 34.5 -15 1092 No stop 12 19 10 --- 06 45 21 19.1 606.6 4.0 34.6 75 1115 12 17 41 12 19 10 NGC1068 06 45 21 17.9 606.0 4.0 34.4 -15 1115 No stop 12 20 40 --- 06 46 51 17.6 606.3 4.1 34.5 75 1138 12 19 11 12 21 20 J0243+0121 06 47 32 18.8 607.1 4.0 34.8 25 1138 12 21 20 12 22 20 --- 06 48 32 18.7 607.3 4.1 34.8 60 1154 12 21 21 12 22 20 NGC1068 06 48 32 17.4 606.7 4.1 34.6 -15 1154 No stop 12 23 50 --- 06 50 02 17.2 607.0 4.1 34.7 75 1177 12 22 21 12 23 50 J0243+0121 06 50 02 18.5 607.6 4.1 34.9 -15 1177 No stop 12 25 20 --- 06 51 32 18.2 607.9 4.1 35.0 75 1200 12 23 51 12 25 20 NGC1068 06 51 32 17.0 607.3 4.1 34.8 -15 1200 No stop 12 26 50 --- 06 53 02 16.8 607.7 4.2 34.9 75 1223 12 25 21 12 26 50 J0243+0121 06 53 02 18.0 608.3 4.1 35.1 -15 1223 No stop 12 28 20 --- 06 54 33 17.8 608.6 4.2 35.2 75 1246 12 26 51 12 28 20 NGC1068 06 54 33 16.5 608.0 4.2 35.0 -15 1246 No stop 12 29 50 --- 06 56 03 16.3 608.3 4.2 35.1 75 1269 12 28 21 12 30 30 J0243+0121 06 56 43 17.5 609.1 4.2 35.3 25 1269 12 30 30 12 31 30 --- 06 57 43 17.3 609.3 4.2 35.4 60 1285 12 30 31 12 31 30 NGC1068 06 57 43 16.1 608.7 4.2 35.2 -15 1285 No stop 12 33 00 --- 06 59 13 15.9 609.0 4.3 35.3 75 1308 12 31 31 12 33 00 J0243+0121 06 59 13 17.1 609.6 4.2 35.5 -15 1308 No stop 12 34 30 --- 07 00 44 16.9 609.9 4.3 35.5 75 1331 12 33 01 Schedule for BADARY (Code Bd ) Page 6 NGC1068-K 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 16 Mar 2021 Day 75 --- 12 34 30 NGC1068 07 00 44 15.7 609.3 4.3 35.4 -15 1331 No stop 12 36 00 --- 07 02 14 15.4 609.6 4.3 35.5 75 1354 12 34 31 12 36 00 J0243+0121 07 02 14 16.7 610.2 4.3 35.6 -15 1354 No stop 12 37 30 --- 07 03 44 16.5 610.5 4.3 35.7 75 1377 12 36 01 12 37 30 NGC1068 07 03 44 15.2 609.9 4.3 35.5 -15 1377 No stop 12 39 00 --- 07 05 14 15.0 610.2 4.4 35.6 75 1400 12 37 31 12 39 40 J0243+0121 07 05 55 16.2 611.0 4.4 35.8 25 1400 12 39 40 12 40 40 --- 07 06 55 16.0 611.2 4.4 35.9 60 1415 12 39 41 12 40 40 NGC1068 07 06 55 14.8 610.6 4.4 35.7 -15 1415 No stop 12 42 10 --- 07 08 25 14.5 610.9 4.4 35.8 75 1438 12 40 41 12 42 10 J0243+0121 07 08 25 15.8 611.5 4.4 36.0 -15 1438 No stop 12 43 40 --- 07 09 55 15.6 611.8 4.4 36.0 75 1462 12 42 11 12 43 40 NGC1068 07 09 55 14.3 611.2 4.4 35.9 -15 1462 No stop 12 45 10 --- 07 11 25 14.1 611.5 4.5 35.9 75 1485 12 43 41 12 45 10 J0243+0121 07 11 25 15.3 612.2 4.4 36.1 -15 1485 No stop 12 46 40 --- 07 12 56 15.1 612.5 4.5 36.2 75 1508 12 45 11 12 46 40 NGC1068 07 12 56 13.9 611.9 4.5 36.0 -15 1508 No stop 12 48 10 --- 07 14 26 13.7 612.2 4.5 36.1 75 1531 12 46 41 12 48 50 J0243+0121 07 15 06 14.8 612.9 4.5 36.3 25 1531 12 48 50 12 49 50 --- 07 16 06 14.7 613.1 4.5 36.3 60 1546 12 48 51 12 49 50 NGC1068 07 16 06 13.4 612.5 4.5 36.2 -15 1546 No stop 12 51 20 --- 07 17 36 13.2 612.8 4.6 36.2 75 1569 12 49 51 12 51 20 J0243+0121 07 17 36 14.4 613.5 4.5 36.4 -15 1569 No stop 12 52 50 --- 07 19 07 14.2 613.8 4.6 36.5 75 1592 12 51 21 12 52 50 NGC1068 07 19 07 13.0 613.1 4.6 36.3 -15 1592 No stop 12 54 20 --- 07 20 37 12.7 613.4 4.6 36.4 75 1615 12 52 51 12 55 00 J0243+0121 07 21 17 13.9 614.2 4.6 36.6 25 1615 12 55 00 12 56 00 --- 07 22 17 13.7 614.4 4.6 36.6 60 1631 12 55 01 13 04 00 0234+285 07 30 19 32.7 636.5 4.9 44.6 425 1631 13 04 00 13 07 00 --- 07 33 19 32.2 637.1 4.9 44.5 180 1677 13 04 01 Schedule for BADARY (Code Bd ) Page 7 NGC1068-K 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 16 Mar 2021 Day 75 --- 13 09 00 J0243+0121 07 35 19 11.8 617.1 4.8 37.1 65 1677 13 09 00 13 11 00 --- 07 37 20 11.5 617.5 4.9 37.2 120 1708 13 09 01 13 11 00 NGC1068 07 37 20 10.2 616.9 4.9 37.1 -15 1708 No stop 13 12 30 --- 07 38 50 10.0 617.2 4.9 37.1 75 1731 13 11 01 13 12 30 J0243+0121 07 38 50 11.3 617.8 4.9 37.2 -15 1731 No stop 13 14 00 --- 07 40 20 11.0 618.1 4.9 37.3 75 1754 13 12 31 13 15 30 J0243+0121 07 41 50 10.8 618.4 5.0 37.3 84 1754 13 15 30 13 17 00 --- 07 43 21 10.6 618.7 5.0 37.4 90 1777 13 15 31 13 19 10 J0243+0121 07 45 31 10.2 619.2 5.0 37.4 124 1777 13 19 10 13 20 10 --- 07 46 31 10.1 619.4 5.0 37.5 60 1792 13 19 11 15 06 00 0234+285 09 32 39 14.7 658.3 6.9 38.5 6295 1792 15 06 00 15 09 00 --- 09 35 39 14.3 658.8 6.9 38.3 180 1838 15 06 01 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess121.K2048 Matching groups in /home/guest/rmc/SCHED/sched11.6/catalogs/freq_RDBE.dat: kvzr_k Added by Des Small, 24 February 2012 Setup group: 3 Station: BADARY Total bit rate: 2048 Format: MARK5B Bits per sample: 2 Sample rate: 64.000 Number of channels: 16 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 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 9 1 9 2 10 2 10 3 11 3 11 4 12 4 12 BBC SB= L L U U L L U U L L U U L L U U IF = A B A B A B A B A B A B A B A B The following frequency sets based on these setups were used. Frequency Set: 11 Setup file default. Used with PCAL = off LO sum= 22139.49 22139.49 22139.49 22139.49 22203.49 22203.49 22203.49 22203.49 22267.49 22267.49 22267.49 22267.49 22331.49 22331.49 22331.49 22331.49 BBC fr= 219.49 219.49 219.49 219.49 283.49 283.49 283.49 283.49 347.49 347.49 347.49 347.49 411.49 411.49 411.49 411.49 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: 11 12 13 Track assignments are: track1= 18, 26, 2, 10, 20, 28, 4, 12, 22, 30, 6, 14, 24, 32, 8, 16 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * NGC1068 02 40 07.044869 * 02 42 40.709050 02 43 44.045950 0.00 -00 13 31.70973 *-00 00 47.94500 00 04 22.67104 0.00 From catalog imbedded in main SCHED input file. * J0243+0121 02 41 04.844755 * 02 43 39.545200 02 44 43.318873 0.00 01 08 28.48592 * 01 21 09.48500 01 26 19.26370 0.00 From catalog imbedded in main SCHED input file. * 0234+285 02 34 55.589590 * 02 37 52.405677 02 39 05.299419 0.00 J0237+2848 28 35 11.40773 * 28 48 08.98999 28 53 32.59965 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 NGC1068 sess121.K2048 1 2 3 4 5 6 7 9 11 14 17 2.642 163.596 J0243+0121 sess121.K2048 1 2 3 4 5 6 7 9 11 14 17 2.425 163.808 0234+285 sess121.K2048 1 2 3 4 5 6 7 9 11 14 17 0.167 19.767 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) NGC1068 44.4 J0243+0121 44.8 0234+285 51.3 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