COVER INFORMATION Station: DARNHALL (Code Da ) Experiment: EVN observations of CSOs at 1.3cm (Session 1) Exp. Code: EY045A Schedule Version: 2.00 Processed by SCHED version: 11.60 Release 11.6; April 2020 PI: Xi Yan Address: Calaxy and Cosmology Group Xinjiang Astronomical Observatory (XAO), CAS 150 Science 1-Street, Urumqi 830011, China Phone: +86 17335173376 EMAIL: yanxi@xao.ac.cn Fax: Phone during observation: +86 17335173376 Observing mode: vlbi Notes: Target: J0111+3906 (relatively strong, 250~400 mJy) and 0402+379 (through phase-referencing) Fringe Finder: J0422+5324 (1.3 Jy at 22GHz) Phase-referencing calibrator of 0402+379: J0355+3909 (0.26mJy at 22GHz, relatively compact, 2.33 degrees apart on the sky) Schedule for DARNHALL (Code Da ) Page 2 EVN observations of CSOs at 1.3cm (Session 1) 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 25 Feb 2025 Day 56 --- Next scan frequencies: 22235.49 22235.49 Next BBC frequencies: 780.51 780.51 Next scan bandwidths: 64.00 64.00 09 30 00 3C454.3 19 41 52 37.4 115.5 -3.2 -34.3 0 0 09 30 00 09 34 00 --- 19 45 52 37.9 116.5 -3.2 -34.0 240 15 09 30 01 09 37 00 J0111+3906 19 48 53 35.4 69.7 -5.4 -46.6 17 15 09 37 00 09 40 00 =0108+388 19 51 53 35.8 70.2 -5.4 -46.8 180 27 09 37 01 09 40 30 J0111+3906 19 52 23 35.8 70.3 -5.3 -46.8 26 27 09 40 30 09 54 00 =0108+388 20 05 55 37.8 72.5 -5.1 -47.6 810 79 09 40 31 09 54 30 J0111+3906 20 06 26 37.8 72.6 -5.1 -47.6 26 79 09 54 30 10 08 00 =0108+388 20 19 58 39.8 74.8 -4.9 -48.4 810 131 09 54 31 10 08 30 J0111+3906 20 20 28 39.9 74.9 -4.9 -48.4 26 131 10 08 30 10 22 00 =0108+388 20 34 00 41.8 77.2 -4.7 -49.0 810 184 10 08 31 10 22 30 J0111+3906 20 34 30 41.9 77.3 -4.6 -49.1 26 184 10 22 30 10 36 00 =0108+388 20 48 02 43.9 79.6 -4.4 -49.6 810 236 10 22 31 10 36 30 J0111+3906 20 48 32 44.0 79.7 -4.4 -49.6 26 236 10 36 30 10 50 00 =0108+388 21 02 05 46.0 82.1 -4.2 -50.1 810 288 10 36 31 10 50 30 J0111+3906 21 02 35 46.0 82.2 -4.2 -50.1 26 288 10 50 30 11 04 00 =0108+388 21 16 07 48.1 84.7 -3.9 -50.4 810 340 10 50 31 11 04 30 J0111+3906 21 16 37 48.1 84.8 -3.9 -50.4 26 340 11 04 30 11 18 00 =0108+388 21 30 09 50.2 87.3 -3.7 -50.7 810 392 11 04 31 11 18 30 J0111+3906 21 30 39 50.2 87.4 -3.7 -50.7 26 392 11 18 30 11 32 00 =0108+388 21 44 12 52.3 90.0 -3.5 -50.7 810 444 11 18 31 11 32 30 J0111+3906 21 44 42 52.3 90.1 -3.5 -50.7 26 444 11 32 30 11 40 00 =0108+388 21 52 13 53.5 91.7 -3.3 -50.7 450 473 11 32 31 11 40 30 J0111+3906 21 52 43 53.5 91.8 -3.3 -50.7 26 473 11 40 30 11 50 30 =0108+388 22 02 45 55.0 93.9 -3.2 -50.6 600 512 11 40 31 11 52 30 J0355+3909 22 04 45 31.5 65.2 -5.9 -44.6 11 512 11 52 30 11 53 30 --- 22 05 45 31.6 65.3 -5.9 -44.7 60 516 11 52 31 11 53 30 0402+379 22 05 45 29.4 64.5 -6.0 -43.5 -25 516 No stop 11 54 50 --- 22 07 05 29.6 64.7 -6.0 -43.6 55 521 11 53 31 Schedule for DARNHALL (Code Da ) Page 3 EVN observations of CSOs at 1.3cm (Session 1) 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 25 Feb 2025 Day 56 --- 11 54 50 J0355+3909 22 07 05 31.8 65.6 -5.8 -44.8 -26 521 No stop 11 56 10 --- 22 08 26 32.0 65.8 -5.8 -44.9 54 526 11 54 51 11 56 10 0402+379 22 08 26 29.7 64.9 -6.0 -43.7 -25 526 No stop 11 57 30 --- 22 09 46 29.9 65.2 -6.0 -43.8 55 531 11 56 11 11 57 30 J0355+3909 22 09 46 32.1 66.0 -5.8 -45.0 -26 531 No stop 11 58 50 --- 22 11 06 32.3 66.2 -5.8 -45.1 54 537 11 57 31 11 58 50 0402+379 22 11 06 30.1 65.4 -5.9 -43.9 -25 537 No stop 12 00 10 --- 22 12 26 30.3 65.6 -5.9 -44.0 55 542 11 58 51 12 00 10 J0355+3909 22 12 26 32.5 66.4 -5.7 -45.2 -26 542 No stop 12 01 30 --- 22 13 46 32.7 66.6 -5.7 -45.3 54 547 12 00 11 12 01 30 0402+379 22 13 46 30.5 65.8 -5.9 -44.1 -25 547 No stop 12 02 50 --- 22 15 07 30.7 66.0 -5.9 -44.2 55 552 12 01 31 12 02 50 J0355+3909 22 15 07 32.9 66.9 -5.7 -45.4 -26 552 No stop 12 04 10 --- 22 16 27 33.1 67.1 -5.7 -45.5 54 557 12 02 51 12 04 10 0402+379 22 16 27 30.8 66.3 -5.9 -44.3 -25 557 No stop 12 05 30 --- 22 17 47 31.0 66.5 -5.8 -44.3 55 562 12 04 11 12 06 30 J0355+3909 22 18 47 33.4 67.4 -5.6 -45.6 34 562 12 06 30 12 07 50 --- 22 20 07 33.6 67.7 -5.6 -45.7 80 567 12 06 31 12 07 50 0402+379 22 20 07 31.3 66.9 -5.8 -44.5 -25 567 No stop 12 09 10 --- 22 21 28 31.5 67.1 -5.8 -44.6 55 573 12 07 51 12 09 10 J0355+3909 22 21 28 33.8 67.9 -5.6 -45.8 -26 573 No stop 12 10 30 --- 22 22 48 33.9 68.1 -5.6 -45.9 54 578 12 09 11 12 10 30 0402+379 22 22 48 31.7 67.3 -5.7 -44.7 -25 578 No stop 12 11 50 --- 22 24 08 31.9 67.5 -5.7 -44.8 55 583 12 10 31 12 11 50 J0355+3909 22 24 08 34.1 68.3 -5.5 -46.0 -26 583 No stop 12 13 10 --- 22 25 28 34.3 68.5 -5.5 -46.1 54 588 12 11 51 12 13 10 0402+379 22 25 28 32.1 67.7 -5.7 -44.9 -25 588 No stop 12 14 30 --- 22 26 49 32.3 68.0 -5.7 -45.0 55 593 12 13 11 12 14 30 J0355+3909 22 26 49 34.5 68.7 -5.5 -46.2 -26 593 No stop 12 15 50 --- 22 28 09 34.7 69.0 -5.5 -46.3 54 598 12 14 31 Schedule for DARNHALL (Code Da ) Page 4 EVN observations of CSOs at 1.3cm (Session 1) 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 25 Feb 2025 Day 56 --- 12 15 50 0402+379 22 28 09 32.5 68.2 -5.7 -45.0 -25 598 No stop 12 17 10 --- 22 29 29 32.6 68.4 -5.6 -45.1 55 604 12 15 51 12 17 10 J0355+3909 22 29 29 34.9 69.2 -5.5 -46.4 -26 604 No stop 12 18 30 --- 22 30 49 35.1 69.4 -5.4 -46.4 54 609 12 17 11 12 18 30 0402+379 22 30 49 32.8 68.6 -5.6 -45.2 -25 609 No stop 12 19 50 --- 22 32 09 33.0 68.8 -5.6 -45.3 55 614 12 18 31 12 20 50 J0355+3909 22 33 10 35.4 69.8 -5.4 -46.6 34 614 12 20 50 12 22 10 --- 22 34 30 35.6 70.0 -5.4 -46.7 80 619 12 20 51 12 22 10 0402+379 22 34 30 33.3 69.2 -5.5 -45.5 -25 619 No stop 12 23 30 --- 22 35 50 33.5 69.5 -5.5 -45.5 55 624 12 22 11 12 23 30 J0355+3909 22 35 50 35.8 70.2 -5.4 -46.8 -26 624 No stop 12 24 50 --- 22 37 10 36.0 70.4 -5.3 -46.8 54 629 12 23 31 12 24 50 0402+379 22 37 10 33.7 69.7 -5.5 -45.6 -25 629 No stop 12 26 10 --- 22 38 30 33.9 69.9 -5.5 -45.7 55 634 12 24 51 12 26 10 J0355+3909 22 38 30 36.1 70.7 -5.3 -46.9 -26 634 No stop 12 27 30 --- 22 39 51 36.3 70.9 -5.3 -47.0 54 640 12 26 11 12 27 30 0402+379 22 39 51 34.1 70.1 -5.5 -45.8 -25 640 No stop 12 28 50 --- 22 41 11 34.3 70.3 -5.4 -45.9 55 645 12 27 31 12 28 50 J0355+3909 22 41 11 36.5 71.1 -5.3 -47.1 -26 645 No stop 12 30 10 --- 22 42 31 36.7 71.3 -5.2 -47.2 54 650 12 28 51 12 30 10 0402+379 22 42 31 34.5 70.6 -5.4 -46.0 -25 650 No stop 12 31 30 --- 22 43 51 34.7 70.8 -5.4 -46.0 55 655 12 30 11 12 31 30 J0355+3909 22 43 51 36.9 71.5 -5.2 -47.2 -26 655 No stop 12 32 50 --- 22 45 12 37.1 71.8 -5.2 -47.3 54 660 12 31 31 12 32 50 0402+379 22 45 12 34.8 71.0 -5.4 -46.1 -25 660 No stop 12 34 10 --- 22 46 32 35.0 71.2 -5.3 -46.2 55 665 12 32 51 12 35 10 J0355+3909 22 47 32 37.4 72.1 -5.2 -47.5 34 665 12 35 10 12 36 30 --- 22 48 52 37.6 72.4 -5.1 -47.5 80 671 12 35 11 12 36 30 0402+379 22 48 52 35.4 71.6 -5.3 -46.3 -25 671 No stop 12 37 50 --- 22 50 12 35.6 71.8 -5.3 -46.4 55 676 12 36 31 Schedule for DARNHALL (Code Da ) Page 5 EVN observations of CSOs at 1.3cm (Session 1) 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 25 Feb 2025 Day 56 --- 12 37 50 J0355+3909 22 50 12 37.8 72.6 -5.1 -47.6 -26 676 No stop 12 39 10 --- 22 51 33 38.0 72.8 -5.1 -47.7 54 681 12 37 51 12 39 10 0402+379 22 51 33 35.7 72.1 -5.3 -46.5 -25 681 No stop 12 40 30 --- 22 52 53 35.9 72.3 -5.2 -46.6 55 686 12 39 11 12 40 30 J0355+3909 22 52 53 38.2 73.0 -5.1 -47.8 -26 686 No stop 12 41 50 --- 22 54 13 38.4 73.2 -5.0 -47.8 54 691 12 40 31 12 41 50 0402+379 22 54 13 36.1 72.5 -5.2 -46.6 -25 691 No stop 12 43 10 --- 22 55 33 36.3 72.7 -5.2 -46.7 55 696 12 41 51 12 43 10 J0355+3909 22 55 33 38.6 73.5 -5.0 -47.9 -26 696 No stop 12 44 30 --- 22 56 53 38.8 73.7 -5.0 -48.0 54 701 12 43 11 12 44 30 0402+379 22 56 53 36.5 73.0 -5.2 -46.8 -25 701 No stop 12 45 50 --- 22 58 14 36.7 73.2 -5.2 -46.9 55 707 12 44 31 12 45 50 J0355+3909 22 58 14 39.0 73.9 -5.0 -48.1 -26 707 No stop 12 47 10 --- 22 59 34 39.2 74.1 -5.0 -48.1 54 712 12 45 51 12 47 10 0402+379 22 59 34 36.9 73.4 -5.1 -46.9 -25 712 No stop 12 48 30 --- 23 00 54 37.1 73.6 -5.1 -47.0 55 717 12 47 11 12 49 30 J0355+3909 23 01 54 39.5 74.5 -4.9 -48.2 34 717 12 49 30 12 50 50 --- 23 03 15 39.7 74.8 -4.9 -48.3 80 722 12 49 31 12 50 50 0402+379 23 03 15 37.4 74.0 -5.1 -47.1 -25 722 No stop 12 52 10 --- 23 04 35 37.6 74.2 -5.0 -47.2 55 727 12 50 51 12 52 10 J0355+3909 23 04 35 39.9 75.0 -4.9 -48.4 -26 727 No stop 12 53 30 --- 23 05 55 40.1 75.2 -4.9 -48.5 54 732 12 52 11 12 53 30 0402+379 23 05 55 37.8 74.5 -5.0 -47.3 -25 732 No stop 12 54 50 --- 23 07 15 38.0 74.7 -5.0 -47.3 55 737 12 53 31 12 54 50 J0355+3909 23 07 15 40.3 75.4 -4.8 -48.5 -26 737 No stop 12 56 10 --- 23 08 35 40.5 75.6 -4.8 -48.6 54 743 12 54 51 12 56 10 0402+379 23 08 35 38.2 74.9 -5.0 -47.4 -25 743 No stop 12 57 30 --- 23 09 56 38.4 75.2 -5.0 -47.5 55 748 12 56 11 12 57 30 J0355+3909 23 09 56 40.7 75.9 -4.8 -48.6 -26 748 No stop 12 58 50 --- 23 11 16 40.9 76.1 -4.8 -48.7 54 753 12 57 31 Schedule for DARNHALL (Code Da ) Page 6 EVN observations of CSOs at 1.3cm (Session 1) 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 25 Feb 2025 Day 56 --- 12 58 50 0402+379 23 11 16 38.6 75.4 -4.9 -47.5 -25 753 No stop 13 00 10 --- 23 12 36 38.8 75.6 -4.9 -47.6 55 758 12 58 51 13 00 10 J0355+3909 23 12 36 41.0 76.3 -4.7 -48.8 -26 758 No stop 13 01 30 --- 23 13 56 41.2 76.6 -4.7 -48.8 54 763 13 00 11 13 01 30 0402+379 23 13 56 39.0 75.8 -4.9 -47.7 -25 763 No stop 13 02 50 --- 23 15 16 39.2 76.1 -4.9 -47.7 55 768 13 01 31 13 03 50 J0355+3909 23 16 17 41.6 76.9 -4.7 -48.9 34 768 13 03 50 13 05 10 --- 23 17 37 41.8 77.2 -4.7 -49.0 80 774 13 03 51 13 05 10 0402+379 23 17 37 39.5 76.5 -4.8 -47.8 -26 774 No stop 13 06 30 --- 23 18 57 39.7 76.7 -4.8 -47.9 54 779 13 05 11 13 06 30 J0355+3909 23 18 57 42.0 77.4 -4.6 -49.1 -26 779 No stop 13 07 50 --- 23 20 17 42.2 77.6 -4.6 -49.1 54 784 13 06 31 13 07 50 0402+379 23 20 17 39.9 76.9 -4.8 -47.9 -26 784 No stop 13 09 10 --- 23 21 38 40.1 77.1 -4.8 -48.0 54 789 13 07 51 13 09 10 J0355+3909 23 21 38 42.4 77.9 -4.6 -49.2 -26 789 No stop 13 10 30 --- 23 22 58 42.6 78.1 -4.6 -49.2 54 794 13 09 11 13 10 30 0402+379 23 22 58 40.3 77.4 -4.7 -48.1 -26 794 No stop 13 11 50 --- 23 24 18 40.5 77.6 -4.7 -48.1 54 799 13 10 31 13 11 50 J0355+3909 23 24 18 42.8 78.3 -4.5 -49.3 -26 799 No stop 13 13 10 --- 23 25 38 43.0 78.6 -4.5 -49.3 54 804 13 11 51 13 13 10 0402+379 23 25 38 40.7 77.8 -4.7 -48.2 -26 804 No stop 13 14 30 --- 23 26 58 40.9 78.1 -4.7 -48.2 54 810 13 13 11 13 14 30 J0355+3909 23 26 58 43.1 78.8 -4.5 -49.4 -26 810 No stop 13 15 50 --- 23 28 19 43.3 79.0 -4.5 -49.5 54 815 13 14 31 13 15 50 0402+379 23 28 19 41.1 78.3 -4.7 -48.3 -26 815 No stop 13 17 10 --- 23 29 39 41.3 78.5 -4.6 -48.3 54 820 13 15 51 13 18 10 J0355+3909 23 30 39 43.7 79.4 -4.4 -49.5 34 820 13 18 10 13 19 30 --- 23 31 59 43.9 79.7 -4.4 -49.6 80 825 13 18 11 13 19 30 0402+379 23 31 59 41.6 78.9 -4.6 -48.4 -26 825 No stop 13 20 50 --- 23 33 19 41.8 79.2 -4.6 -48.5 54 830 13 19 31 Schedule for DARNHALL (Code Da ) Page 7 EVN observations of CSOs at 1.3cm (Session 1) 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 25 Feb 2025 Day 56 --- 13 20 50 J0355+3909 23 33 19 44.1 79.9 -4.4 -49.6 -26 830 No stop 13 22 10 --- 23 34 40 44.3 80.1 -4.4 -49.7 54 835 13 20 51 13 24 10 J0422+5324 23 36 40 48.9 59.4 -4.8 -60.1 35 835 13 24 10 13 29 10 =0418+532 23 41 41 49.5 60.0 -4.7 -60.7 300 855 13 24 11 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess125.K2048 --- 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: 16 Station: DARNHALL Total bit rate: 512 Format: VDIF Bits per sample: 2 Sample rate:128.000 Number of channels: 2 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 23016.00 23016.00 Net SB= U U IF SB = L L Pol. = RCP LCP BBC = 1 9 BBC SB= L L IF = A1 B1 The following frequency sets based on these setups were used. Frequency Set: 14 Setup file default. Used with PCAL = off LO sum= 22235.49 22235.49 BBC fr= 780.51 780.51 Bandwd= 64.00 64.00 Matching frequency sets: 14 15 16 17 Track assignments are: track1= 1, 2 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * J0355+3909 03 51 56.635287 * 03 55 16.590900 03 56 57.142590 0.00 39 00 24.86250 * 39 09 09.80500 39 13 43.96170 0.00 From catalog imbedded in main SCHED input file. 0108+388 01 08 47.254574 * 01 11 37.316770 01 13 01.585478 0.05 * J0111+3906 38 50 32.81430 * 39 06 28.10393 39 14 33.46890 0.05 J0111+39 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 644 observations. * 0402+379 04 02 29.863331 * 04 05 49.262754 04 07 29.616698 0.18 J0405+3803 37 55 27.11233 * 38 03 32.23441 38 07 46.08933 0.18 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 92 observations. 0418+532 04 18 49.157437 * 04 22 44.398872 04 24 42.988240 0.22 * J0422+5324 53 17 25.97780 * 53 24 26.26326 53 28 11.74196 0.22 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc GSFC 2016a X/S astro solution, 62 observations. * 3C454.3 22 51 29.519739 * 22 53 57.747939 22 55 10.938013 0.65 J2253+1608 15 52 54.34808 * 16 08 53.56091 16 16 48.88479 0.73 2251+158 /home/guest/rmc/SCHED/sched11.6/catalogs/sources.gsfc J2253+16 GSFC 2016a X/S astro solution, 41272 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 J0355+3909 sess125.K2048 1 2 3 6 7 8 10 11 12 13 14 + 0.706 74.836 J0111+3906 sess125.K2048 1 2 3 6 7 8 10 11 12 13 14 + 2.142 320.717 0402+379 sess125.K2048 1 2 3 6 7 8 10 11 12 13 14 + 0.689 68.076 J0422+5324 sess125.K2048 1 2 3 6 7 8 10 11 12 13 14 + 0.083 11.333 3C454.3 sess125.K2048 1 2 3 6 7 8 10 11 12 13 14 + 0.067 10.200 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) J0355+3909 88.3 J0111+3906 60.4 0402+379 90.1 J0422+5324 95.6 3C454.3 25.7 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