COVER INFORMATION Station: METSAHOV (Code Mh ) Experiment: Fine-scale imaging of M87 Exp. Code: gs042 Schedule Version: 1.00 Processed by SCHED version: 11.40 Release 11.4. March 14, 2015 PI: Tuomas Savolainen Address: Aalto University Metsahovi Radio Observatory Metsahovintie 114, 02540 Kylmala, Finland Phone: +358505819717 EMAIL: tuomas.k.savolainen@aalto.fi Fax: Phone during observation: +358505819717 Observing mode: K-band dual-pol Notes: K-band, Radioastron-compatible frequency setup P-CAL is ON Tsys is ON auto-level (AGC) is ON Schedule for METSAHOV (Code Mh ) Page 2 Fine-scale imaging of M87 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 14 May 2018 Day 134 --- Next scan frequencies: 22236.00 22236.00 22236.00 22236.00 Next BBC frequencies: 756.00 756.00 756.00 756.00 Next scan bandwidths: 16.00 16.00 16.00 16.00 12 43 50 1156+295 05 50 16 23.8 72.5 -6.2 -32.8 0 0 12 43 50 12 45 30 --- 05 51 56 24.0 72.8 -6.1 -32.9 100 3 12 43 51 12 46 10 1156+295 05 52 36 24.1 72.9 -6.1 -32.9 38 3 12 46 10 12 50 20 --- 05 56 47 24.6 73.8 -6.1 -33.1 250 11 12 46 11 12 53 30 1228+126 05 59 57 6.8 77.0 -6.5 -29.7 166 11 12 53 30 13 02 50 --- 06 09 19 7.9 79.0 -6.4 -29.9 560 29 12 53 31 13 10 30 1228+126 06 17 00 8.8 80.7 -6.2 -30.1 457 29 13 10 30 13 20 00 --- 06 26 31 10.0 82.7 -6.1 -30.3 570 47 13 10 31 13 20 30 1228+126 06 27 02 10.1 82.8 -6.1 -30.3 28 47 13 20 30 13 29 50 --- 06 36 23 11.2 84.8 -5.9 -30.4 560 65 13 20 31 13 37 20 1236+077 06 43 54 6.9 87.1 -5.9 -30.0 439 65 13 37 20 13 38 50 --- 06 45 25 7.1 87.4 -5.9 -30.0 90 68 13 37 21 13 39 30 1228+126 06 46 05 12.4 86.9 -5.8 -30.5 29 68 13 39 30 13 48 50 --- 06 55 26 13.6 88.9 -5.6 -30.5 560 86 13 39 31 13 49 20 1228+126 06 55 56 13.6 89.0 -5.6 -30.5 28 86 13 49 20 13 53 40 --- 07 00 17 14.2 90.0 -5.5 -30.6 260 95 13 49 21 13 54 10 1156+295 07 00 47 32.4 87.0 -5.0 -34.6 6 95 13 54 10 13 55 50 --- 07 02 27 32.6 87.3 -5.0 -34.6 100 98 13 54 11 13 56 20 1156+295 07 02 57 32.7 87.4 -5.0 -34.6 28 98 13 56 20 14 00 40 --- 07 07 18 33.2 88.4 -4.9 -34.6 260 106 13 56 21 14 01 10 1236+077 07 07 48 9.8 92.3 -5.5 -30.0 1 106 14 01 10 14 03 10 --- 07 09 49 10.1 92.7 -5.5 -30.0 120 110 14 01 11 14 04 00 1228+126 07 10 39 15.5 92.2 -5.4 -30.5 39 110 14 04 00 14 13 10 --- 07 19 50 16.6 94.2 -5.2 -30.5 550 128 14 04 01 14 14 10 1226+023 07 20 50 8.0 100.1 -5.2 -29.3 45 128 14 14 10 14 18 10 --- 07 24 51 8.5 101.0 -5.1 -29.2 240 135 14 14 11 14 18 40 1236+077 07 25 21 12.0 96.1 -5.2 -29.9 19 135 14 18 40 14 20 10 --- 07 26 51 12.2 96.4 -5.2 -29.8 90 138 14 18 41 Schedule for METSAHOV (Code Mh ) Page 3 Fine-scale imaging of M87 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 14 May 2018 Day 134 --- 14 21 00 1228+126 07 27 41 17.6 96.0 -5.1 -30.4 39 138 14 21 00 14 27 20 --- 07 34 03 18.4 97.4 -5.0 -30.3 380 150 14 21 01 14 27 50 1236+077 07 34 33 13.1 98.1 -5.1 -29.7 19 150 14 27 50 14 29 10 --- 07 35 53 13.3 98.4 -5.1 -29.7 80 153 14 27 51 ---------- K-band VLBI scans. Space segment 02: 1228+126 ---------- 14 30 00 1228+126 07 36 43 18.7 98.0 -4.9 -30.2 39 153 14 30 00 14 50 00 --- 07 56 46 21.1 102.5 -4.6 -29.8 1200 191 14 30 01 14 50 30 1228+126 07 57 16 21.2 102.6 -4.6 -29.7 28 191 14 50 30 14 51 30 --- 07 58 16 21.3 102.8 -4.6 -29.7 60 193 14 50 31 14 52 10 1228+126 07 58 57 21.4 103.0 -4.5 -29.7 38 193 14 52 10 15 10 00 --- 08 16 50 23.6 107.1 -4.2 -29.1 1070 228 14 52 11 ---------- K-band VLBI scans. Ground segment 03: ---------- 15 10 20 1236+077 08 17 10 18.3 107.7 -4.4 -28.5 9 228 15 10 20 15 11 50 --- 08 18 40 18.5 108.1 -4.4 -28.4 90 230 15 10 21 15 12 40 1228+126 08 19 30 23.9 107.7 -4.2 -29.0 39 230 15 12 40 15 22 10 --- 08 29 02 25.0 110.0 -4.0 -28.5 570 249 15 12 41 15 23 10 1226+023 08 30 02 16.1 115.7 -4.0 -26.6 45 249 15 23 10 15 28 10 --- 08 35 03 16.7 116.9 -3.9 -26.3 300 258 15 23 11 15 28 40 1236+077 08 35 33 20.4 112.0 -4.1 -27.7 19 258 15 28 40 15 30 10 --- 08 37 03 20.6 112.3 -4.1 -27.6 90 261 15 28 41 15 31 00 1228+126 08 37 53 26.0 112.1 -3.9 -28.1 39 261 15 31 00 15 40 30 --- 08 47 25 27.1 114.4 -3.7 -27.6 570 279 15 31 01 15 42 10 1253-055 08 49 05 8.2 117.4 -4.1 -26.3 75 279 15 42 10 15 46 10 --- 08 53 05 8.7 118.3 -4.1 -26.1 240 287 15 42 11 15 47 50 1228+126 08 54 46 27.9 116.2 -3.6 -27.1 75 287 15 47 50 15 56 50 --- 09 03 47 28.9 118.4 -3.5 -26.6 540 304 15 47 51 15 57 30 1228+126 09 04 27 29.0 118.6 -3.5 -26.5 38 304 15 57 30 16 06 50 --- 09 13 49 30.0 120.9 -3.3 -25.9 560 322 15 57 31 16 08 30 1156+295 09 15 29 48.5 119.7 -2.7 -29.6 76 322 16 08 30 16 12 30 --- 09 19 30 48.9 120.8 -2.7 -29.2 240 330 16 08 31 Schedule for METSAHOV (Code Mh ) Page 4 Fine-scale imaging of M87 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 14 May 2018 Day 134 --- 16 14 00 1228+126 09 21 00 30.8 122.8 -3.2 -25.3 66 330 16 14 00 16 22 30 --- 09 29 31 31.6 125.0 -3.0 -24.6 510 346 16 14 01 16 23 10 1228+126 09 30 12 31.7 125.2 -3.0 -24.6 38 346 16 23 10 16 32 30 --- 09 39 33 32.6 127.6 -2.9 -23.7 560 364 16 23 11 16 33 30 1226+023 09 40 33 23.3 132.8 -2.8 -21.4 45 364 16 33 30 16 37 30 --- 09 44 34 23.7 133.8 -2.8 -21.0 240 372 16 33 31 16 38 30 1228+126 09 45 34 33.2 129.2 -2.8 -23.2 45 372 16 38 30 16 47 30 --- 09 54 36 34.1 131.7 -2.6 -22.3 540 389 16 38 31 16 48 10 1228+126 09 55 16 34.1 131.8 -2.6 -22.3 38 389 16 48 10 16 57 30 --- 10 04 37 35.0 134.4 -2.5 -21.3 560 407 16 48 11 16 59 10 1253-055 10 06 17 15.9 135.4 -2.8 -20.5 75 407 16 59 10 17 03 10 --- 10 10 18 16.2 136.4 -2.8 -20.1 240 415 16 59 11 17 04 50 1228+126 10 11 58 35.6 136.5 -2.3 -20.5 75 415 17 04 50 17 14 10 --- 10 21 20 36.4 139.1 -2.2 -19.4 560 433 17 04 51 17 14 50 1228+126 10 22 00 36.5 139.3 -2.2 -19.3 38 433 17 14 50 17 25 00 --- 10 32 12 37.3 142.3 -2.0 -18.1 610 453 17 14 51 17 25 50 1228+126 10 33 02 37.3 142.5 -2.0 -18.0 48 453 17 25 50 17 34 20 --- 10 41 33 38.0 145.0 -1.8 -16.9 510 469 17 25 51 17 36 00 1156+295 10 43 14 56.3 148.6 -1.3 -17.2 76 469 17 36 00 17 39 20 --- 10 46 34 56.5 149.9 -1.2 -16.6 200 475 17 36 01 17 41 00 1228+126 10 48 14 38.4 147.0 -1.7 -16.1 76 475 17 41 00 17 49 20 --- 10 56 36 39.0 149.5 -1.6 -14.9 500 491 17 41 01 17 50 20 1226+023 10 57 36 29.1 153.3 -1.5 -12.9 44 491 17 50 20 17 54 20 --- 11 01 37 29.3 154.4 -1.5 -12.4 240 499 17 50 21 17 55 20 1253-055 11 02 37 20.2 149.5 -1.9 -14.7 45 499 17 55 20 17 59 20 --- 11 06 37 20.4 150.5 -1.8 -14.2 240 507 17 55 21 18 01 00 1228+126 11 08 18 39.7 153.1 -1.4 -13.3 75 507 18 01 00 18 04 20 --- 11 11 38 39.8 154.2 -1.3 -12.8 200 513 18 01 01 Schedule for METSAHOV (Code Mh ) Page 5 Fine-scale imaging of M87 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 14 May 2018 Day 134 --- ---------- K-band VLBI scans. Space segment 03: 1228+126 ---------- 18 05 00 1228+126 11 12 18 39.9 154.4 -1.3 -12.7 38 513 18 05 00 18 25 00 --- 11 32 22 40.8 160.7 -1.0 -9.7 1200 552 18 05 01 18 25 40 1228+126 11 33 02 40.9 160.9 -1.0 -9.6 38 552 18 25 40 18 45 00 --- 11 52 25 41.5 167.1 -0.7 -6.5 1160 589 18 25 41 ---------- K-band VLBI scans. Ground segment 04: ---------- 18 45 40 1228+126 11 53 05 41.5 167.3 -0.6 -6.4 38 589 18 45 40 18 55 00 --- 12 02 26 41.8 170.4 -0.5 -4.9 560 607 18 45 41 18 56 40 1156+295 12 04 07 58.9 181.5 0.1 0.9 77 607 18 56 40 19 00 10 --- 12 07 37 58.9 183.0 0.1 1.7 210 613 18 56 41 19 01 40 1228+126 12 09 08 41.9 172.6 -0.4 -3.8 67 613 19 01 40 19 09 40 --- 12 17 09 42.0 175.2 -0.2 -2.4 480 629 19 01 41 19 11 10 1253-055 12 18 39 23.5 169.6 -0.6 -5.2 65 629 19 11 10 19 14 40 --- 12 22 10 23.5 170.5 -0.6 -4.7 210 636 19 11 11 19 16 20 1228+126 12 23 50 42.1 177.4 -0.1 -1.3 75 636 19 16 20 19 24 40 --- 12 32 11 42.1 180.1 0.0 0.1 500 652 19 16 21 ---------- K-band VLBI scans. Ground segment 04: ---------- 19 25 40 1228+126 12 33 12 42.1 180.5 0.0 0.2 58 652 19 25 40 19 34 40 --- 12 42 13 42.0 183.4 0.2 1.7 540 669 19 25 41 19 35 50 1226+023 12 43 23 31.7 183.9 0.2 1.9 54 669 19 35 50 19 39 40 --- 12 47 14 31.6 185.0 0.3 2.5 230 676 19 35 51 19 40 50 1228+126 12 48 24 42.0 185.5 0.3 2.8 54 676 19 40 50 19 49 40 --- 12 57 15 41.8 188.4 0.4 4.2 530 693 19 40 51 19 51 10 1156+295 12 58 46 57.4 204.1 1.0 13.4 68 693 19 51 10 19 54 50 --- 13 02 26 57.2 205.5 1.0 14.2 220 700 19 51 11 19 56 20 1228+126 13 03 57 41.7 190.6 0.5 5.3 69 700 19 56 20 20 05 00 --- 13 12 38 41.5 193.4 0.7 6.8 520 717 19 56 21 20 06 40 1253-055 13 14 18 23.8 184.7 0.3 2.3 76 717 20 06 40 20 10 00 --- 13 17 39 23.8 185.6 0.3 2.8 200 723 20 06 41 Schedule for METSAHOV (Code Mh ) Page 6 Fine-scale imaging of M87 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 14 May 2018 Day 134 --- 20 11 40 1228+126 13 19 19 41.3 195.5 0.8 7.8 76 723 20 11 40 20 20 00 --- 13 27 40 41.0 198.2 0.9 9.1 500 739 20 11 41 20 20 40 1228+126 13 28 21 40.9 198.4 0.9 9.2 38 739 20 20 40 20 25 00 --- 13 32 41 40.8 199.8 1.0 9.9 260 748 20 20 41 ---------- K-band VLBI scans. Ground segment 04: ---------- 20 26 20 1228+126 13 34 01 40.7 200.2 1.0 10.1 78 748 20 26 20 20 35 30 --- 13 43 13 40.3 203.1 1.2 11.5 550 765 20 26 21 20 36 50 1156+295 13 44 33 54.3 221.1 1.7 22.0 56 765 20 36 50 20 40 30 --- 13 48 14 54.0 222.4 1.8 22.5 220 772 20 36 51 20 41 50 1228+126 13 49 34 40.0 205.1 1.3 12.5 56 772 20 41 50 20 50 30 --- 13 58 15 39.5 207.8 1.4 13.7 520 789 20 41 51 20 51 50 1226+023 13 59 36 29.2 205.9 1.5 12.5 64 789 20 51 50 20 55 30 --- 14 03 16 29.0 206.9 1.6 13.0 220 796 20 51 51 20 56 50 1228+126 14 04 36 39.1 209.8 1.5 14.6 64 796 20 56 50 21 05 30 --- 14 13 18 38.6 212.4 1.7 15.8 520 813 20 56 51 21 07 00 1253-055 14 14 48 22.1 200.9 1.3 10.3 68 813 21 07 00 21 10 30 --- 14 18 19 22.0 201.8 1.4 10.7 210 820 21 07 01 21 12 00 1228+126 14 19 49 38.1 214.3 1.8 16.7 68 820 21 12 00 21 20 30 --- 14 28 20 37.5 216.9 1.9 17.8 510 836 21 12 01 21 21 10 1228+126 14 29 00 37.4 217.0 2.0 17.8 38 836 21 21 10 21 30 00 --- 14 37 52 36.8 219.6 2.1 18.9 530 853 21 21 11 21 30 40 1228+126 14 38 32 36.7 219.8 2.1 19.0 38 853 21 30 40 21 39 00 --- 14 46 53 36.0 222.2 2.3 20.0 500 869 21 30 41 ---------- K-band VLBI scans. Space segment 04: 1228+126 ---------- 21 40 00 1228+126 14 47 54 35.9 222.5 2.3 20.1 58 869 21 40 00 21 56 40 --- 15 04 36 34.5 227.2 2.5 21.9 1000 901 21 40 01 21 57 20 1228+126 15 05 16 34.4 227.3 2.6 22.0 38 901 21 57 20 22 13 20 --- 15 21 19 32.9 231.7 2.8 23.5 960 932 21 57 21 22 14 00 1228+126 15 21 59 32.8 231.9 2.8 23.6 38 932 22 14 00 22 30 00 --- 15 38 02 31.2 236.1 3.1 24.9 960 962 22 14 01 Schedule for METSAHOV (Code Mh ) Page 7 Fine-scale imaging of M87 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 14 May 2018 Day 134 --- 22 31 20 1253-055 15 39 22 16.6 222.5 2.7 19.7 59 962 22 31 20 22 33 20 --- 15 41 22 16.5 222.9 2.7 19.9 120 966 22 31 21 22 35 00 1156+295 15 43 03 41.9 255.5 3.7 33.4 62 966 22 35 00 22 37 00 --- 15 45 03 41.6 256.0 3.7 33.5 120 970 22 35 01 22 38 40 1228+126 15 46 43 30.3 238.3 3.2 25.6 76 970 22 38 40 22 42 40 --- 15 50 44 29.9 239.3 3.3 25.9 240 978 22 38 41 22 43 30 1228+126 15 51 34 29.8 239.5 3.3 26.0 48 978 22 43 30 22 52 00 --- 16 00 05 28.9 241.7 3.5 26.6 510 994 22 43 31 22 52 40 1228+126 16 00 46 28.8 241.8 3.5 26.6 38 994 22 52 40 22 56 40 --- 16 04 46 28.4 242.8 3.6 26.9 240 1002 22 52 41 22 57 30 1228+126 16 05 36 28.3 243.1 3.6 26.9 48 1002 22 57 30 23 10 00 --- 16 18 08 26.9 246.1 3.8 27.7 750 1026 22 57 31 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: ra1cm2.set --- 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: 20 Station: METSAHOV Total bit rate: 256 Format: MARK5B Bits per sample: 2 Sample rate: 32.000 Number of channels: 4 DBE type: DBBC_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 21480.00 21480.00 21480.00 21480.00 Net SB= U U L L IF SB = U U U U Pol. = RCP LCP RCP LCP BBC = 1 9 1 9 BBC SB= U U L L IF = A1 B1 A1 B1 The following frequency sets based on these setups were used. Frequency Set: 11 Setup file default. Used with PCAL = 1MHz LO sum= 22236.00 22236.00 22236.00 22236.00 BBC fr= 756.00 756.00 756.00 756.00 Bandwd= 16.00 16.00 16.00 16.00 Matching frequency sets: 11 Track assignments are: track1= 2, 4, 6, 8 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * FAKERA 11 57 21.769299 * 12 00 00.000000 12 00 58.985352 0.00 85 16 41.77889 * 85 00 00.00000 84 54 13.48772 0.00 From catalog imbedded in main SCHED input file. fake circumpolar target for a TS to look at J1239+0730 12 36 52.308755 * 12 39 24.588327 12 40 20.487542 0.10 * 1236+077 07 46 45.39997 * 07 30 17.18902 07 24 18.52672 0.11 J1239+07 From catalog imbedded in main SCHED input file. rfc_2012b Petrov, 2012, unpublished 1855 observations * 1226+023 12 26 33.245835 * 12 29 06.699731 12 30 03.025117 0.00 J1229+0203 02 19 43.30547 * 02 03 08.59797 01 57 05.87367 0.00 3C273B ./gs042_sources.radioastron 3C273 AGN, rfc_2013d Petrov, 2013, unpublished 32011 observations, RA-AO4-07, RA-AO3-0 * 1253-055 12 53 35.831289 * 12 56 11.166557 12 57 08.371431 0.00 J1256-0547 -05 31 07.99603 *-05 47 21.52489 -05 53 17.34581 0.00 3C279 ./gs042_sources.radioastron AGN, rfc_2013d Petrov, 2013, unpublished 7924 observations, RA-AO4-07, RA-AO3-04 * 1228+126 12 28 17.569280 * 12 30 49.423382 12 31 45.092957 0.00 J1230+1223 12 40 01.74883 * 12 23 28.04365 12 17 28.41095 0.00 3C274 ./gs042_sources.radioastron M87 AGN, rfc_2013d Petrov, 2013, unpublished 55201 observations, RA-AO3-04, RA-AO3-0 VIR-A * 1156+295 11 56 57.786212 * 11 59 31.833913 12 00 28.033628 0.00 J1159+2914 29 31 25.73868 * 29 14 43.82678 29 08 45.29167 0.00 ./gs042_sources.radioastron AGN, MASIV, rfc_2013d Petrov, 2013, unpublished 70591 observations, RA-AO3-04, R 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 FAKERA ra1cm2.set 9 2.783 0.000 1236+077 ra1cm2.set 1 2 3 6 7 8 11 13 14 15 16 + 0.347 16.742 1226+023 ra1cm2.set 1 2 3 6 7 8 11 13 14 15 16 + 0.667 51.411 1253-055 ra1cm2.set 1 2 3 6 7 8 11 13 14 15 16 + 0.597 42.278 1228+126 ra1cm2.set 1 2 3 6 7 8 11 13 14 15 16 + 8.722 862.110 ra7mm2.set 30 31 32 0.350 15.750 1156+295 ra1cm2.set 1 2 3 6 7 8 11 13 14 15 16 + 0.617 51.640 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) FAKERA 74.5 1236+077 131.5 1226+023 132.1 1253-055 141.6 1228+126 127.0 1156+295 111.1 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