COVER INFORMATION Station: HART (Code Hh ) Experiment: VLBI Astrometry of HD 179821: Supergiant or Post-AGB Star? Exp. Code: EX008 Schedule Version: 1.00 Processed by SCHED version: 11.40 Release 11.4. March 14, 2015 PI: Shuangjing Xu Address: Shanghai Astronomical Observatory No. 80, Nandan Road Shanghai China Phone: +8602134775508 EMAIL: xsj@shao.ac.cn Fax: Phone during observation: +8615001735093 Observing mode: Phase-referencing of a sources at 18cm (1 Gb/s) Notes: Schedule for HART (Code Hh ) Page 2 VLBI Astrometry of HD 179821: Supergiant or Post-AGB Star? 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 ---------------------------------------------------------------------------------------- --- Mon 28 May 2018 Day 148 --- Next scan frequencies: 1619.86 1619.86 1619.86 1619.86 1673.99 1673.99 1673.99 1673.99 1646.92 1646.92 1646.92 1646.92 1712.13 1712.13 1712.13 1712.13 Next BBC frequencies: 109.86 109.86 109.86 109.86 163.99 163.99 163.99 163.99 136.92 136.92 136.92 136.92 202.13 202.13 202.13 202.13 Next scan bandwidths: 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 22 00 00 1901+319 16 16 19 19.7 36.9 -2.8 0.0 0 0 22 00 00 22 04 00 --- 16 20 19 20.2 36.2 -2.7 0.0 240 31 22 00 01 22 04 00 HD179821 16 20 19 40.5 65.2 -2.9 0.0 -91 31 No stop 22 06 45 --- 16 23 05 41.1 64.7 -2.9 0.0 74 52 22 04 01 22 07 30 J1914+0124 16 23 50 40.4 63.2 -2.9 0.0 17 52 22 07 30 22 09 00 --- 16 25 20 40.7 62.9 -2.8 0.0 90 64 22 07 31 22 09 00 HD179821 16 25 20 41.5 64.3 -2.8 0.0 -28 64 No stop 22 10 45 --- 16 27 06 41.9 63.9 -2.8 0.0 77 77 22 09 01 22 10 45 J1913-0151 16 27 06 43.1 66.1 -2.8 0.0 -31 77 No stop 22 12 15 --- 16 28 36 43.4 65.8 -2.8 0.0 59 89 22 10 46 22 12 15 HD179821 16 28 36 42.2 63.6 -2.8 0.0 -31 89 No stop 22 14 00 --- 16 30 21 42.6 63.3 -2.7 0.0 74 102 22 12 16 22 14 00 J1907+0127 16 30 21 43.1 60.4 -2.6 0.0 -30 102 No stop 22 15 30 --- 16 31 51 43.4 60.1 -2.6 0.0 60 114 22 14 01 22 15 30 HD179821 16 31 51 42.9 63.0 -2.7 0.0 -30 114 No stop 22 17 15 --- 16 33 37 43.2 62.6 -2.7 0.0 75 128 22 15 31 22 17 15 J1920-0236 16 33 37 43.4 67.0 -2.8 0.0 -32 128 No stop 22 18 45 --- 16 35 07 43.7 66.7 -2.8 0.0 58 139 22 17 16 22 18 45 HD179821 16 35 07 43.5 62.3 -2.7 0.0 -32 139 No stop 22 20 30 --- 16 36 52 43.9 61.9 -2.6 0.0 73 153 22 18 46 22 21 15 J1914+0124 16 37 37 43.2 60.4 -2.6 0.0 17 153 22 21 15 22 22 45 --- 16 39 08 43.5 60.1 -2.6 0.0 90 164 22 21 16 22 22 45 HD179821 16 39 08 44.3 61.4 -2.6 0.0 -28 164 No stop 22 24 30 --- 16 40 53 44.6 61.1 -2.6 0.0 77 178 22 22 46 22 24 30 J1913-0151 16 40 53 45.9 63.3 -2.6 0.0 -31 178 No stop 22 26 00 --- 16 42 23 46.2 62.9 -2.5 0.0 59 189 22 24 31 Schedule for HART (Code Hh ) Page 3 VLBI Astrometry of HD 179821: Supergiant or Post-AGB Star? 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 ---------------------------------------------------------------------------------------- --- Mon 28 May 2018 Day 148 --- 22 26 00 HD179821 16 42 23 44.9 60.7 -2.5 0.0 -31 189 No stop 22 27 45 --- 16 44 08 45.3 60.4 -2.5 0.0 74 203 22 26 01 22 27 45 J1907+0127 16 44 08 45.7 57.4 -2.4 0.0 -30 203 No stop 22 29 15 --- 16 45 39 46.0 57.0 -2.4 0.0 60 214 22 27 46 22 29 15 HD179821 16 45 39 45.6 60.0 -2.5 0.0 -30 214 No stop 22 31 00 --- 16 47 24 45.9 59.6 -2.5 0.0 75 228 22 29 16 22 31 00 J1920-0236 16 47 24 46.2 64.2 -2.6 0.0 -32 228 No stop 22 32 30 --- 16 48 54 46.5 63.9 -2.5 0.0 58 240 22 31 01 22 32 30 HD179821 16 48 54 46.2 59.3 -2.4 0.0 -32 240 No stop 22 34 15 --- 16 50 39 46.6 58.9 -2.4 0.0 73 253 22 32 31 22 35 00 J1914+0124 16 51 25 45.8 57.3 -2.4 0.0 17 253 22 35 00 22 36 30 --- 16 52 55 46.1 57.0 -2.4 0.0 90 265 22 35 01 22 36 30 HD179821 16 52 55 47.0 58.4 -2.4 0.0 -28 265 No stop 22 38 15 --- 16 54 40 47.3 57.9 -2.3 0.0 77 278 22 36 31 22 38 15 J1913-0151 16 54 40 48.6 60.2 -2.3 0.0 -31 278 No stop 22 39 45 --- 16 56 10 48.9 59.8 -2.3 0.0 59 290 22 38 16 22 39 45 HD179821 16 56 10 47.6 57.6 -2.3 0.0 -31 290 No stop 22 41 30 --- 16 57 56 47.9 57.1 -2.3 0.0 74 303 22 39 46 22 41 30 J1907+0127 16 57 56 48.3 54.0 -2.2 0.0 -30 303 No stop 22 43 00 --- 16 59 26 48.6 53.6 -2.1 0.0 60 315 22 41 31 22 43 00 HD179821 16 59 26 48.2 56.8 -2.3 0.0 -30 315 No stop 22 44 45 --- 17 01 11 48.6 56.3 -2.2 0.0 75 328 22 43 01 22 44 45 J1920-0236 17 01 11 49.0 61.2 -2.3 0.0 -32 328 No stop 22 46 15 --- 17 02 41 49.3 60.8 -2.3 0.0 58 340 22 44 46 22 46 15 HD179821 17 02 41 48.8 56.0 -2.2 0.0 -32 340 No stop 22 48 00 --- 17 04 27 49.2 55.5 -2.2 0.0 73 354 22 46 16 22 48 45 J1914+0124 17 05 12 48.4 54.0 -2.2 0.0 17 354 22 48 45 22 50 15 --- 17 06 42 48.7 53.6 -2.1 0.0 90 365 22 48 46 22 50 15 HD179821 17 06 42 49.6 54.9 -2.1 0.0 -28 365 No stop 22 52 00 --- 17 08 27 49.9 54.5 -2.1 0.0 77 379 22 50 16 Schedule for HART (Code Hh ) Page 4 VLBI Astrometry of HD 179821: Supergiant or Post-AGB Star? 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 ---------------------------------------------------------------------------------------- --- Mon 28 May 2018 Day 148 --- 22 52 00 J1913-0151 17 08 27 51.3 56.7 -2.1 0.0 -31 379 No stop 22 53 30 --- 17 09 58 51.6 56.3 -2.1 0.0 59 390 22 52 01 22 53 30 HD179821 17 09 58 50.2 54.1 -2.1 0.0 -31 390 No stop 22 55 15 --- 17 11 43 50.5 53.6 -2.1 0.0 74 404 22 53 31 22 55 15 J1907+0127 17 11 43 50.8 50.2 -1.9 0.0 -30 404 No stop 22 56 45 --- 17 13 13 51.0 49.8 -1.9 0.0 60 415 22 55 16 22 56 45 HD179821 17 13 13 50.8 53.2 -2.0 0.0 -30 415 No stop 22 58 30 --- 17 14 58 51.1 52.7 -2.0 0.0 75 429 22 56 46 22 58 30 J1920-0236 17 14 58 51.7 57.8 -2.1 0.0 -32 429 No stop 23 00 00 --- 17 16 29 52.0 57.4 -2.1 0.0 58 441 22 58 31 23 00 00 HD179821 17 16 29 51.3 52.3 -2.0 0.0 -32 441 No stop 23 01 45 --- 17 18 14 51.7 51.8 -1.9 0.0 73 454 23 00 01 23 02 30 J1914+0124 17 18 59 50.8 50.2 -1.9 0.0 17 454 23 02 30 23 04 00 --- 17 20 29 51.1 49.8 -1.9 0.0 90 466 23 02 31 23 04 00 HD179821 17 20 29 52.1 51.1 -1.9 0.0 -28 466 No stop 23 05 45 --- 17 22 15 52.4 50.6 -1.9 0.0 77 479 23 04 01 23 05 45 J1913-0151 17 22 15 53.8 52.9 -1.9 0.0 -31 479 No stop 23 07 15 --- 17 23 45 54.1 52.4 -1.8 0.0 59 491 23 05 46 23 07 15 HD179821 17 23 45 52.6 50.2 -1.9 0.0 -31 491 No stop 23 09 00 --- 17 25 30 52.9 49.7 -1.8 0.0 74 504 23 07 16 23 09 00 J1907+0127 17 25 30 53.1 46.1 -1.7 0.0 -30 504 No stop 23 10 30 --- 17 27 00 53.3 45.6 -1.7 0.0 60 516 23 09 01 23 10 30 HD179821 17 27 00 53.2 49.2 -1.8 0.0 -30 516 No stop 23 12 15 --- 17 28 46 53.5 48.7 -1.8 0.0 75 529 23 10 31 23 12 15 J1920-0236 17 28 46 54.2 53.9 -1.9 0.0 -32 529 No stop 23 13 45 --- 17 30 16 54.5 53.5 -1.9 0.0 58 541 23 12 16 23 13 45 HD179821 17 30 16 53.7 48.2 -1.7 0.0 -32 541 No stop 23 15 30 --- 17 32 01 54.0 47.6 -1.7 0.0 73 555 23 13 46 23 16 15 J1914+0124 17 32 46 53.1 46.1 -1.7 0.0 17 555 23 16 15 23 17 45 --- 17 34 17 53.4 45.6 -1.7 0.0 90 566 23 16 16 Schedule for HART (Code Hh ) Page 5 VLBI Astrometry of HD 179821: Supergiant or Post-AGB Star? 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 ---------------------------------------------------------------------------------------- --- Mon 28 May 2018 Day 148 --- 23 17 45 HD179821 17 34 17 54.4 46.9 -1.7 0.0 -28 566 No stop 23 19 30 --- 17 36 02 54.7 46.3 -1.6 0.0 77 580 23 17 46 23 19 30 J1913-0151 17 36 02 56.2 48.6 -1.6 0.0 -31 580 No stop 23 21 00 --- 17 37 32 56.5 48.1 -1.6 0.0 59 591 23 19 31 23 21 00 HD179821 17 37 32 54.9 45.8 -1.6 0.0 -31 591 No stop 23 22 45 --- 17 39 17 55.2 45.3 -1.6 0.0 74 605 23 21 01 23 22 45 J1907+0127 17 39 17 55.2 41.5 -1.5 0.0 -30 605 No stop 23 24 15 --- 17 40 48 55.4 41.0 -1.5 0.0 60 616 23 22 46 23 24 15 HD179821 17 40 48 55.4 44.7 -1.6 0.0 -30 616 No stop 23 26 00 --- 17 42 33 55.7 44.1 -1.5 0.0 75 630 23 24 16 23 26 00 J1920-0236 17 42 33 56.7 49.7 -1.7 0.0 -32 630 No stop 23 27 30 --- 17 44 03 56.9 49.2 -1.6 0.0 58 642 23 26 01 23 27 30 HD179821 17 44 03 56.0 43.6 -1.5 0.0 -32 642 No stop 23 29 15 --- 17 45 48 56.2 43.0 -1.5 0.0 73 655 23 27 31 23 30 00 J1914+0124 17 46 34 55.3 41.4 -1.5 0.0 17 655 23 30 00 23 31 30 --- 17 48 04 55.5 40.9 -1.5 0.0 90 667 23 30 01 23 31 30 HD179821 17 48 04 56.6 42.2 -1.4 0.0 -28 667 No stop 23 33 15 --- 17 49 49 56.8 41.6 -1.4 0.0 77 680 23 31 31 23 33 15 J1913-0151 17 49 49 58.5 43.7 -1.4 0.0 -31 680 No stop 23 34 45 --- 17 51 19 58.7 43.1 -1.4 0.0 59 692 23 33 16 23 34 45 HD179821 17 51 19 57.1 41.0 -1.4 0.0 -31 692 No stop 23 36 30 --- 17 53 05 57.3 40.3 -1.4 0.0 74 705 23 34 46 23 36 30 J1907+0127 17 53 05 57.2 36.4 -1.3 0.0 -30 705 No stop 23 38 00 --- 17 54 35 57.4 35.8 -1.2 0.0 60 717 23 36 31 23 38 00 HD179821 17 54 35 57.5 39.8 -1.3 0.0 -30 717 No stop 23 39 45 --- 17 56 20 57.8 39.1 -1.3 0.0 75 730 23 38 01 23 39 45 J1920-0236 17 56 20 58.9 44.8 -1.4 0.0 -32 730 No stop 23 41 15 --- 17 57 50 59.2 44.2 -1.4 0.0 58 742 23 39 46 23 41 15 HD179821 17 57 50 58.0 38.5 -1.3 0.0 -32 742 No stop 23 43 00 --- 17 59 36 58.2 37.8 -1.3 0.0 73 756 23 41 16 Schedule for HART (Code Hh ) Page 6 VLBI Astrometry of HD 179821: Supergiant or Post-AGB Star? 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 ---------------------------------------------------------------------------------------- --- Mon 28 May 2018 Day 148 --- 23 43 45 J1914+0124 18 00 21 57.2 36.3 -1.2 0.0 17 756 23 43 45 23 45 15 --- 18 01 51 57.4 35.7 -1.2 0.0 90 767 23 43 46 23 45 15 HD179821 18 01 51 58.5 36.9 -1.2 0.0 -28 767 No stop 23 47 00 --- 18 03 36 58.8 36.2 -1.2 0.0 77 781 23 45 16 23 47 00 J1913-0151 18 03 36 60.5 38.2 -1.2 0.0 -31 781 No stop 23 48 30 --- 18 05 07 60.7 37.6 -1.2 0.0 59 792 23 47 01 23 48 30 HD179821 18 05 07 59.0 35.6 -1.2 0.0 -31 792 No stop 23 50 15 --- 18 06 52 59.2 34.9 -1.1 0.0 74 806 23 48 31 23 50 15 J1907+0127 18 06 52 58.9 30.7 -1.0 0.0 -30 806 No stop 23 51 45 --- 18 08 22 59.1 30.1 -1.0 0.0 60 817 23 50 16 23 51 45 HD179821 18 08 22 59.4 34.2 -1.1 0.0 -30 817 No stop 23 53 30 --- 18 10 07 59.6 33.5 -1.1 0.0 75 831 23 51 46 23 53 30 J1920-0236 18 10 07 61.0 39.3 -1.2 0.0 -32 831 No stop 23 55 00 --- 18 11 38 61.2 38.7 -1.2 0.0 58 842 23 53 31 23 55 00 HD179821 18 11 38 59.8 32.8 -1.1 0.0 -32 842 No stop 23 56 45 --- 18 13 23 60.0 32.1 -1.0 0.0 73 856 23 55 01 23 57 30 J1914+0124 18 14 08 58.9 30.7 -1.0 0.0 17 856 23 57 30 23 59 00 --- 18 15 38 59.1 30.0 -1.0 0.0 90 868 23 57 31 --- Start: Mon 28 May 2018 Day 148 -- Stop: Tue 29 May 2018 Day 149 --- 23 59 00 HD179821 18 15 38 60.3 31.1 -1.0 0.0 -28 868 No stop 00 00 45 --- 18 17 24 60.5 30.3 -1.0 0.0 77 881 23 59 01 00 00 45 J1913-0151 18 17 24 62.3 32.1 -1.0 0.0 -31 881 No stop 00 02 15 --- 18 18 54 62.5 31.4 -0.9 0.0 59 893 00 00 46 00 02 15 HD179821 18 18 54 60.7 29.6 -0.9 0.0 -31 893 No stop 00 04 00 --- 18 20 39 60.8 28.8 -0.9 0.0 74 906 00 02 16 00 04 00 J1907+0127 18 20 39 60.3 24.5 -0.8 0.0 -30 906 No stop 00 05 30 --- 18 22 09 60.5 23.8 -0.8 0.0 60 918 00 04 01 00 05 30 HD179821 18 22 09 61.0 28.1 -0.9 0.0 -30 918 No stop 00 07 15 --- 18 23 55 61.2 27.3 -0.9 0.0 75 931 00 05 31 Schedule for HART (Code Hh ) Page 7 VLBI Astrometry of HD 179821: Supergiant or Post-AGB Star? 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 29 May 2018 Day 149 --- 00 07 15 J1920-0236 18 23 55 62.9 33.1 -1.0 0.0 -32 931 No stop 00 08 45 --- 18 25 25 63.0 32.4 -0.9 0.0 58 943 00 07 16 00 08 45 HD179821 18 25 25 61.3 26.5 -0.8 0.0 -32 943 No stop 00 10 30 --- 18 27 10 61.5 25.7 -0.8 0.0 73 956 00 08 46 00 11 15 J1914+0124 18 27 55 60.4 24.5 -0.8 0.0 17 956 00 11 15 00 12 45 --- 18 29 26 60.5 23.8 -0.8 0.0 90 968 00 11 16 00 12 45 HD179821 18 29 26 61.7 24.6 -0.8 0.0 -28 968 No stop 00 14 30 --- 18 31 11 61.9 23.7 -0.7 0.0 77 982 00 12 46 00 14 30 J1913-0151 18 31 11 63.8 25.2 -0.7 0.0 -31 982 No stop 00 16 00 --- 18 32 41 63.9 24.4 -0.7 0.0 59 993 00 14 31 00 16 00 HD179821 18 32 41 62.0 23.0 -0.7 0.0 -31 993 No stop 00 17 45 --- 18 34 26 62.2 22.1 -0.7 0.0 74 1007 00 16 01 00 17 45 J1907+0127 18 34 26 61.4 17.8 -0.6 0.0 -30 1007 No stop 00 19 15 --- 18 35 57 61.5 17.1 -0.5 0.0 60 1018 00 17 46 00 19 15 HD179821 18 35 57 62.3 21.4 -0.6 0.0 -30 1018 No stop 00 21 00 --- 18 37 42 62.4 20.5 -0.6 0.0 75 1032 00 19 16 00 21 00 J1920-0236 18 37 42 64.4 26.2 -0.7 0.0 -32 1032 No stop 00 22 30 --- 18 39 12 64.5 25.4 -0.7 0.0 58 1043 00 21 01 00 22 30 HD179821 18 39 12 62.6 19.7 -0.6 0.0 -32 1043 No stop 00 24 15 --- 18 40 57 62.7 18.8 -0.6 0.0 73 1057 00 22 31 00 28 00 3C345 18 44 43 18.5 335.9 2.0 0.0 119 1057 00 28 00 00 32 00 --- 18 48 44 18.2 335.2 2.1 0.0 240 1088 00 28 01 00 32 00 HD179821 18 48 44 63.2 14.6 -0.4 0.0 -106 1088 No stop 00 36 00 --- 18 52 44 63.4 12.5 -0.4 0.0 134 1119 00 32 01 00 36 45 J1914+0124 18 53 30 62.2 11.7 -0.4 0.0 17 1119 00 36 45 00 38 15 --- 18 55 00 62.2 10.9 -0.3 0.0 90 1130 00 36 46 00 38 15 HD179821 18 55 00 63.5 11.2 -0.3 0.0 -28 1130 No stop 00 40 00 --- 18 56 45 63.6 10.3 -0.3 0.0 77 1144 00 38 16 00 40 00 J1913-0151 18 56 45 65.6 10.8 -0.3 0.0 -31 1144 No stop 00 41 30 --- 18 58 15 65.6 9.9 -0.3 0.0 59 1156 00 40 01 Schedule for HART (Code Hh ) Page 8 VLBI Astrometry of HD 179821: Supergiant or Post-AGB Star? 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 29 May 2018 Day 149 --- 00 41 30 HD179821 18 58 15 63.6 9.4 -0.3 0.0 -31 1156 No stop 00 43 15 --- 19 00 01 63.7 8.4 -0.2 0.0 74 1169 00 41 31 00 43 15 J1907+0127 19 00 01 62.6 4.4 -0.1 0.0 -30 1169 No stop 00 44 45 --- 19 01 31 62.6 3.6 -0.1 0.0 60 1181 00 43 16 00 44 45 HD179821 19 01 31 63.8 7.6 -0.2 0.0 -30 1181 No stop 00 46 30 --- 19 03 16 63.8 6.6 -0.2 0.0 75 1194 00 44 46 00 46 30 J1920-0236 19 03 16 66.3 11.5 -0.3 0.0 -32 1194 No stop 00 48 00 --- 19 04 46 66.3 10.6 -0.3 0.0 58 1206 00 46 31 00 48 00 HD179821 19 04 46 63.8 5.8 -0.2 0.0 -32 1206 No stop 00 49 45 --- 19 06 32 63.9 4.8 -0.1 0.0 73 1219 00 48 01 00 50 30 J1914+0124 19 07 17 62.6 4.3 -0.1 0.0 17 1219 00 50 30 00 52 00 --- 19 08 47 62.6 3.5 -0.1 0.0 90 1231 00 50 31 00 52 00 HD179821 19 08 47 63.9 3.5 -0.1 0.0 -28 1231 No stop 00 53 45 --- 19 10 32 63.9 2.5 -0.1 0.0 77 1244 00 52 01 00 53 45 J1913-0151 19 10 32 65.9 2.5 -0.1 0.0 -31 1244 No stop 00 55 15 --- 19 12 03 65.9 1.6 -0.0 0.0 59 1256 00 53 46 00 55 15 HD179821 19 12 03 63.9 1.6 -0.0 0.0 -31 1256 No stop 00 57 00 --- 19 13 48 64.0 0.6 -0.0 0.0 74 1270 00 55 16 00 57 00 J1907+0127 19 13 48 62.6 356.9 0.1 0.0 -30 1270 No stop 00 58 30 --- 19 15 18 62.6 356.1 0.1 0.0 60 1281 00 57 01 00 58 30 HD179821 19 15 18 64.0 359.8 0.0 0.0 -30 1281 No stop 01 00 15 --- 19 17 03 63.9 358.8 0.0 0.0 75 1295 00 58 31 01 00 15 J1920-0236 19 17 03 66.7 2.9 -0.1 0.0 -32 1295 No stop 01 01 45 --- 19 18 34 66.7 2.0 -0.1 0.0 58 1306 01 00 16 01 01 45 HD179821 19 18 34 63.9 357.9 0.1 0.0 -32 1306 No stop 01 03 30 --- 19 20 19 63.9 356.9 0.1 0.0 73 1320 01 01 46 01 04 15 J1914+0124 19 21 04 62.6 356.8 0.1 0.0 17 1320 01 04 15 01 05 45 --- 19 22 34 62.6 356.0 0.1 0.0 90 1331 01 04 16 01 05 45 HD179821 19 22 34 63.9 355.7 0.1 0.0 -28 1331 No stop 01 07 30 --- 19 24 20 63.9 354.7 0.2 0.0 77 1345 01 05 46 Schedule for HART (Code Hh ) Page 9 VLBI Astrometry of HD 179821: Supergiant or Post-AGB Star? 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 29 May 2018 Day 149 --- 01 07 30 J1913-0151 19 24 20 65.8 354.1 0.2 0.0 -31 1345 No stop 01 09 00 --- 19 25 50 65.8 353.1 0.2 0.0 59 1356 01 07 31 01 09 00 HD179821 19 25 50 63.8 353.8 0.2 0.0 -31 1356 No stop 01 10 45 --- 19 27 35 63.8 352.8 0.2 0.0 74 1370 01 09 01 01 10 45 J1907+0127 19 27 35 62.2 349.5 0.3 0.0 -30 1370 No stop 01 12 15 --- 19 29 05 62.2 348.7 0.3 0.0 60 1382 01 10 46 01 12 15 HD179821 19 29 05 63.7 352.0 0.2 0.0 -30 1382 No stop 01 14 00 --- 19 30 51 63.7 351.0 0.3 0.0 75 1395 01 12 16 01 14 00 J1920-0236 19 30 51 66.6 354.2 0.2 0.0 -32 1395 No stop 01 15 30 --- 19 32 21 66.5 353.3 0.2 0.0 58 1407 01 14 01 01 15 30 HD179821 19 32 21 63.6 350.2 0.3 0.0 -32 1407 No stop 01 17 15 --- 19 34 06 63.5 349.2 0.3 0.0 73 1420 01 15 31 01 18 00 J1914+0124 19 34 51 62.3 349.4 0.3 0.0 17 1420 01 18 00 01 19 30 --- 19 36 22 62.2 348.6 0.4 0.0 90 1432 01 18 01 01 19 30 HD179821 19 36 22 63.4 347.9 0.4 0.0 -28 1432 No stop 01 21 15 --- 19 38 07 63.4 347.0 0.4 0.0 77 1445 01 19 31 01 21 15 J1913-0151 19 38 07 65.3 345.8 0.4 0.0 -31 1445 No stop 01 22 45 --- 19 39 37 65.2 345.0 0.4 0.0 59 1457 01 21 16 01 22 45 HD179821 19 39 37 63.3 346.2 0.4 0.0 -31 1457 No stop 01 24 30 --- 19 41 22 63.2 345.2 0.4 0.0 74 1470 01 22 46 01 24 30 J1907+0127 19 41 22 61.5 342.4 0.6 0.0 -30 1470 No stop 01 26 00 --- 19 42 53 61.4 341.6 0.6 0.0 60 1482 01 24 31 01 26 00 HD179821 19 42 53 63.1 344.4 0.5 0.0 -30 1482 No stop 01 27 45 --- 19 44 38 63.0 343.5 0.5 0.0 75 1496 01 26 01 01 27 45 J1920-0236 19 44 38 66.0 345.8 0.4 0.0 -32 1496 No stop 01 29 15 --- 19 46 08 65.9 344.9 0.4 0.0 58 1507 01 27 46 01 29 15 HD179821 19 46 08 62.9 342.7 0.5 0.0 -32 1507 No stop 01 31 00 --- 19 47 53 62.8 341.7 0.5 0.0 73 1521 01 29 16 01 31 45 J1914+0124 19 48 39 61.5 342.3 0.6 0.0 17 1521 01 31 45 01 33 15 --- 19 50 09 61.4 341.5 0.6 0.0 90 1532 01 31 46 Schedule for HART (Code Hh ) Page 10 VLBI Astrometry of HD 179821: Supergiant or Post-AGB Star? 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 29 May 2018 Day 149 --- 01 33 15 HD179821 19 50 09 62.6 340.6 0.6 0.0 -28 1532 No stop 01 35 00 --- 19 51 54 62.5 339.7 0.6 0.0 77 1546 01 33 16 01 35 00 J1913-0151 19 51 54 64.3 338.1 0.6 0.0 -31 1546 No stop 01 36 30 --- 19 53 24 64.2 337.2 0.6 0.0 59 1557 01 35 01 01 36 30 HD179821 19 53 24 62.3 338.9 0.6 0.0 -31 1557 No stop 01 38 15 --- 19 55 10 62.2 338.0 0.7 0.0 74 1571 01 36 31 01 38 15 J1907+0127 19 55 10 60.4 335.7 0.8 0.0 -30 1571 No stop 01 39 45 --- 19 56 40 60.2 335.0 0.8 0.0 60 1583 01 38 16 01 39 45 HD179821 19 56 40 62.1 337.2 0.7 0.0 -30 1583 No stop 01 41 30 --- 19 58 25 61.9 336.4 0.7 0.0 75 1596 01 39 46 01 41 30 J1920-0236 19 58 25 65.1 337.8 0.6 0.0 -32 1596 No stop 01 43 00 --- 19 59 55 64.9 336.9 0.6 0.0 58 1608 01 41 31 01 43 00 HD179821 19 59 55 61.8 335.6 0.8 0.0 -32 1608 No stop 01 44 45 --- 20 01 41 61.6 334.8 0.8 0.0 73 1621 01 43 01 01 45 30 J1914+0124 20 02 26 60.4 335.5 0.8 0.0 17 1621 01 45 30 01 47 00 --- 20 03 56 60.2 334.8 0.8 0.0 90 1633 01 45 31 01 47 00 HD179821 20 03 56 61.4 333.7 0.8 0.0 -28 1633 No stop 01 48 45 --- 20 05 41 61.2 332.9 0.8 0.0 77 1646 01 47 01 01 48 45 J1913-0151 20 05 41 63.0 330.9 0.9 0.0 -31 1646 No stop 01 50 15 --- 20 07 12 62.8 330.2 0.9 0.0 59 1658 01 48 46 01 50 15 HD179821 20 07 12 61.1 332.1 0.9 0.0 -31 1658 No stop 01 52 00 --- 20 08 57 60.9 331.3 0.9 0.0 74 1671 01 50 16 01 52 00 J1907+0127 20 08 57 58.9 329.5 1.0 0.0 -30 1671 No stop 01 53 30 --- 20 10 27 58.8 328.8 1.0 0.0 60 1683 01 52 01 01 53 30 HD179821 20 10 27 60.7 330.6 0.9 0.0 -30 1683 No stop 01 55 15 --- 20 12 12 60.5 329.8 1.0 0.0 75 1697 01 53 31 01 55 15 J1920-0236 20 12 12 63.7 330.5 0.8 0.0 -32 1697 No stop 01 56 45 --- 20 13 43 63.5 329.7 0.9 0.0 58 1708 01 55 16 01 56 45 HD179821 20 13 43 60.3 329.2 1.0 0.0 -32 1708 No stop 01 58 30 --- 20 15 28 60.1 328.4 1.0 0.0 73 1722 01 56 46 Schedule for HART (Code Hh ) Page 11 VLBI Astrometry of HD 179821: Supergiant or Post-AGB Star? 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 29 May 2018 Day 149 --- 01 59 15 J1914+0124 20 16 13 58.9 329.3 1.0 0.0 17 1722 01 59 15 02 00 45 --- 20 17 43 58.8 328.7 1.0 0.0 90 1733 01 59 16 02 00 45 HD179821 20 17 43 59.9 327.4 1.0 0.0 -28 1733 No stop 02 02 30 --- 20 19 29 59.7 326.6 1.1 0.0 77 1747 02 00 46 02 02 30 J1913-0151 20 19 29 61.3 324.4 1.1 0.0 -31 1747 No stop 02 04 00 --- 20 20 59 61.1 323.8 1.1 0.0 59 1758 02 02 31 02 04 00 HD179821 20 20 59 59.5 326.0 1.1 0.0 -31 1758 No stop 02 05 45 --- 20 22 44 59.2 325.2 1.1 0.0 74 1772 02 04 01 02 05 45 J1907+0127 20 22 44 57.2 323.8 1.2 0.0 -30 1772 No stop 02 07 15 --- 20 24 14 57.0 323.2 1.3 0.0 60 1784 02 05 46 02 07 15 HD179821 20 24 14 59.0 324.6 1.2 0.0 -30 1784 No stop 02 09 00 --- 20 26 00 58.8 323.9 1.2 0.0 75 1797 02 07 16 02 09 00 J1920-0236 20 26 00 62.0 323.9 1.1 0.0 -32 1797 No stop 02 10 30 --- 20 27 30 61.8 323.2 1.1 0.0 58 1809 02 09 01 02 10 30 HD179821 20 27 30 58.6 323.3 1.2 0.0 -32 1809 No stop 02 12 15 --- 20 29 15 58.4 322.6 1.2 0.0 73 1822 02 10 31 02 13 00 J1914+0124 20 30 00 57.2 323.7 1.2 0.0 17 1822 02 13 00 02 14 30 --- 20 31 31 57.0 323.1 1.3 0.0 90 1834 02 13 01 02 14 30 HD179821 20 31 31 58.1 321.7 1.3 0.0 -28 1834 No stop 02 16 15 --- 20 33 16 57.8 321.0 1.3 0.0 77 1847 02 14 31 02 16 15 J1913-0151 20 33 16 59.4 318.7 1.3 0.0 -31 1847 No stop 02 17 45 --- 20 34 46 59.2 318.1 1.3 0.0 59 1859 02 16 16 02 17 45 HD179821 20 34 46 57.6 320.4 1.3 0.0 -31 1859 No stop 02 19 30 --- 20 36 31 57.4 319.7 1.4 0.0 74 1872 02 17 46 02 19 30 J1907+0127 20 36 31 55.3 318.7 1.5 0.0 -30 1872 No stop 02 21 00 --- 20 38 02 55.1 318.1 1.5 0.0 60 1884 02 19 31 02 21 00 HD179821 20 38 02 57.1 319.2 1.4 0.0 -30 1884 No stop 02 22 45 --- 20 39 47 56.9 318.5 1.4 0.0 75 1898 02 21 01 02 22 45 J1920-0236 20 39 47 60.1 318.0 1.3 0.0 -32 1898 No stop 02 24 15 --- 20 41 17 59.8 317.4 1.3 0.0 58 1909 02 22 46 Schedule for HART (Code Hh ) Page 12 VLBI Astrometry of HD 179821: Supergiant or Post-AGB Star? 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 29 May 2018 Day 149 --- 02 24 15 HD179821 20 41 17 56.6 318.0 1.4 0.0 -32 1909 No stop 02 26 00 --- 20 43 02 56.4 317.4 1.5 0.0 73 1923 02 24 16 02 26 45 J1914+0124 20 43 48 55.3 318.6 1.5 0.0 17 1923 02 26 45 02 28 15 --- 20 45 18 55.1 318.0 1.5 0.0 90 1934 02 26 46 02 28 15 HD179821 20 45 18 56.0 316.6 1.5 0.0 -28 1934 No stop 02 30 00 --- 20 47 03 55.8 315.9 1.5 0.0 77 1948 02 28 16 02 30 00 J1913-0151 20 47 03 57.2 313.5 1.5 0.0 -31 1948 No stop 02 31 30 --- 20 48 33 57.0 313.0 1.6 0.0 59 1959 02 30 01 02 31 30 HD179821 20 48 33 55.5 315.4 1.6 0.0 -31 1959 No stop 02 33 15 --- 20 50 19 55.2 314.8 1.6 0.0 74 1973 02 31 31 02 33 15 J1907+0127 20 50 19 53.1 314.1 1.7 0.0 -30 1973 No stop 02 34 45 --- 20 51 49 52.9 313.6 1.7 0.0 60 1984 02 33 16 02 34 45 HD179821 20 51 49 55.0 314.3 1.6 0.0 -30 1984 No stop 02 36 30 --- 20 53 34 54.7 313.7 1.6 0.0 75 1998 02 34 46 02 36 30 J1920-0236 20 53 34 57.9 312.8 1.5 0.0 -32 1998 No stop 02 38 00 --- 20 55 04 57.6 312.3 1.6 0.0 58 2010 02 36 31 02 38 00 HD179821 20 55 04 54.5 313.2 1.7 0.0 -32 2010 No stop 02 39 45 --- 20 56 50 54.2 312.7 1.7 0.0 73 2023 02 38 01 02 40 30 J1914+0124 20 57 35 53.1 313.9 1.7 0.0 17 2023 02 40 30 02 42 00 --- 20 59 05 52.9 313.5 1.7 0.0 90 2035 02 40 31 02 42 00 HD179821 20 59 05 53.8 312.0 1.7 0.0 -28 2035 No stop 02 43 45 --- 21 00 50 53.5 311.4 1.8 0.0 77 2048 02 42 01 02 43 45 J1913-0151 21 00 50 54.9 309.0 1.8 0.0 -31 2048 No stop 02 45 15 --- 21 02 21 54.6 308.5 1.8 0.0 59 2060 02 43 46 02 45 15 HD179821 21 02 21 53.3 311.0 1.8 0.0 -31 2060 No stop 02 47 00 --- 21 04 06 53.0 310.4 1.8 0.0 74 2073 02 45 16 02 47 00 J1907+0127 21 04 06 50.8 309.9 1.9 0.0 -30 2073 No stop 02 48 30 --- 21 05 36 50.6 309.5 2.0 0.0 60 2085 02 47 01 02 48 30 HD179821 21 05 36 52.7 310.0 1.8 0.0 -30 2085 No stop 02 50 15 --- 21 07 21 52.4 309.4 1.9 0.0 75 2098 02 48 31 Schedule for HART (Code Hh ) Page 13 VLBI Astrometry of HD 179821: Supergiant or Post-AGB Star? 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 29 May 2018 Day 149 --- 02 50 15 J1920-0236 21 07 21 55.5 308.2 1.8 0.0 -32 2098 No stop 02 51 45 --- 21 08 52 55.3 307.8 1.8 0.0 58 2110 02 50 16 02 51 45 HD179821 21 08 52 52.1 309.0 1.9 0.0 -32 2110 No stop 02 53 30 --- 21 10 37 51.8 308.5 1.9 0.0 73 2124 02 51 46 02 56 00 1901+319 21 13 07 24.4 330.1 2.2 0.0 59 2124 02 56 00 03 00 00 --- 21 17 08 23.9 329.3 2.2 0.0 240 2155 02 56 01 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess218.L1024 Matching groups in /home/jops/sched_11.4mod/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: 8 Station: HART Total bit rate: 1024 Format: VDIF Bits per sample: 2 Sample rate: 32.000 Number of channels: 16 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 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 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 = A1 C1 A1 C1 A1 C1 A1 C1 A1 C1 A1 C1 A1 C1 A1 C1 The following frequency sets based on these setups were used. Frequency Set: 7 Based on FREQ, BW, and/or DOPPLER in schedule. Used with PCAL = off **** Warning Only 128.00 MHz of 256.00 MHz in scheduled channels is within IFs. LO sum= 1619.86 1619.86 1619.86 1619.86 1673.99 1673.99 1673.99 1673.99 1646.92 1646.92 1646.92 1646.92 1712.13 1712.13 1712.13 1712.13 BBC fr= 109.86 109.86 109.86 109.86 163.99 163.99 163.99 163.99 136.92 136.92 136.92 136.92 202.13 202.13 202.13 202.13 Bandwd= 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 Matching frequency sets: 7 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) * 3C345 16 41 17.606225 * 16 42 58.809962 16 43 37.086600 0.13 J1642+3948 39 54 10.81487 * 39 48 36.99393 39 46 40.69348 0.10 From catalog imbedded in main SCHED input file. rfc_2017d Petrov and Kovalev, in preparation 52506 observations Doppler based on other sources. * 1901+319 19 01 02.310062 * 19 02 55.938898 19 03 38.405318 0.12 J1902+3159 31 55 13.94287 * 31 59 41.70167 32 01 17.58586 0.10 From catalog imbedded in main SCHED input file. rfc_2017d Petrov and Kovalev, in preparation 3100 observations Doppler based on other sources. * J1914+0124 19 11 42.276115 * 19 14 14.553500 19 15 10.707072 0.00 01 19 12.55529 * 01 24 26.30500 01 26 24.98259 0.00 From catalog imbedded in main SCHED input file. Doppler based on other sources. * J1913-0151 19 11 03.224065 * 19 13 39.125700 19 14 36.583826 0.00 -01 56 58.21028 *-01 51 47.03700 -01 49 48.49137 0.00 From catalog imbedded in main SCHED input file. Doppler based on other sources. * J1907+0127 19 04 39.788442 * 19 07 11.996200 19 08 08.152117 0.00 01 22 24.60002 * 01 27 08.96200 01 28 57.07876 0.00 From catalog imbedded in main SCHED input file. Doppler based on other sources. * J1920-0236 19 18 06.565415 * 19 20 43.262200 19 21 40.976802 0.00 -02 41 51.98262 *-02 36 11.60600 -02 34 02.37285 0.00 From catalog imbedded in main SCHED input file. Doppler based on other sources. * HD179821 19 11 24.911284 * 19 13 58.608200 19 14 55.272496 0.00 00 02 19.33838 * 00 07 31.93600 00 09 30.51003 0.00 From catalog imbedded in main SCHED input file. Doppler based on LSR frame and radio definition. Velocities: 105.00 105.00 105.00 105.00 105.00 105.00 105.00 105.00 105.00 105.00 105.00 105.00 105.00 105.00 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 3C345 sess218.L1024 1 2 3 4 5 6 7 8 11 0.067 3.667 1901+319 sess218.L1024 1 2 3 4 5 6 7 8 11 0.133 7.333 J1914+0124 sess218.L1024 1 2 3 4 5 6 7 8 11 0.500 25.500 J1913-0151 sess218.L1024 1 2 3 4 5 6 7 8 11 0.500 18.730 J1907+0127 sess218.L1024 1 2 3 4 5 6 7 8 11 0.500 18.805 J1920-0236 sess218.L1024 1 2 3 4 5 6 7 8 11 0.500 17.523 HD179821 sess218.L1024 1 2 3 4 5 6 7 8 11 2.446 94.447 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) 3C345 118.5 1901+319 114.1 J1914+0124 132.2 J1913-0151 133.9 J1907+0127 133.6 J1920-0236 132.7 HD179821 132.9 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