COVER INFORMATION Station: WSTRBORK (Code Wb ) Experiment: The nuclear structure in nearby AGN Exp. Code: gs032d Schedule Version: 1.00 Processed by SCHED version: 11.30 Version 11.3 update 1. April 14, 2014 PI: Tuomas Savolainen Address: MPIfR Bonn Auf dem Huegel 69 53121 Bonn, Germany Phone: +49 228 525 473 EMAIL: tsavolainen@mpifr-bonn.mpg.de Fax: +49 228 525 229 Phone during observation: +7 903 661 4865 Observing mode: L-band, dual-pol Notes: L-band, Radioastron-compatible frequency setup Mark5C stations should record in Mk5B+ format P-CAL is ON, Tsys is ON, auto-level (AGC) is ON Please send diskpacks to MPIfR Bonn Schedule for WSTRBORK (Code Wb ) Page 2 The nuclear structure in nearby AGN 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 ---------------------------------------------------------------------------------------- --- Wed 4 Jun 2014 Day 155 --- ---------- Space segment 03: L-band VLBI scans ---------- Next scan frequencies: 1668.00 1668.00 1668.00 1668.00 Next BBC frequencies: 158.00 158.00 158.00 158.00 Next scan bandwidths: 16.00 16.00 16.00 16.00 13 30 00 1228+126 06 48 11 12.3 85.8 -5.7 0.0 0 0 13 30 00 13 49 30 --- 07 07 44 15.2 89.6 -5.4 0.0 1170 37 13 30 04 13 50 00 1228+126 07 08 14 15.3 89.7 -5.4 0.0 19 37 13 50 00 14 09 30 --- 07 27 48 18.3 93.7 -5.1 0.0 1170 75 13 50 04 ---------- L-band GRT-only VLBI scans - segment 04L ---------- 14 10 30 1236+077 07 28 48 13.2 95.2 -5.2 0.0 31 75 14 10 30 14 13 00 --- 07 31 18 13.6 95.7 -5.1 0.0 150 80 14 10 34 14 14 00 1228+126 07 32 18 18.9 94.6 -5.0 0.0 31 80 14 14 00 14 24 00 --- 07 42 20 20.4 96.6 -4.8 0.0 600 99 14 14 04 ---------- Allow time for Kalyazin and Evpatoria to change source ---------- 14 24 30 1228+126 07 42 50 20.5 96.7 -4.8 0.0 19 99 14 24 30 14 34 30 --- 07 52 52 22.0 98.8 -4.6 0.0 600 118 14 24 34 14 35 30 1236+077 07 53 52 17.0 100.4 -4.8 0.0 31 118 14 35 30 14 38 00 --- 07 56 22 17.4 100.9 -4.7 0.0 150 123 14 35 34 14 39 00 1222+037 07 57 22 16.4 106.6 -4.5 0.0 34 123 14 39 00 14 42 00 --- 08 00 23 16.8 107.2 -4.4 0.0 180 129 14 39 04 14 43 30 1226+023 08 01 53 15.2 107.5 -4.5 0.0 72 129 14 43 30 14 52 30 --- 08 10 55 16.5 109.5 -4.3 0.0 540 146 14 43 34 ---------- Allow time for Kalyazin and Evpatoria to change source ---------- 14 54 00 1228+126 08 12 25 24.9 103.0 -4.3 0.0 43 146 14 54 00 15 04 00 --- 08 22 26 26.4 105.1 -4.2 0.0 600 165 14 54 04 15 04 30 1228+126 08 22 57 26.4 105.2 -4.1 0.0 19 165 15 04 30 15 14 30 --- 08 32 58 27.9 107.5 -4.0 0.0 600 185 15 04 34 ---------- Space segment 04: L-band VLBI scans ---------- 15 15 00 1228+126 08 33 28 28.0 107.6 -4.0 0.0 19 185 15 15 00 15 34 30 --- 08 53 01 30.7 112.0 -3.6 0.0 1170 222 15 15 04 Schedule for WSTRBORK (Code Wb ) Page 3 The nuclear structure in nearby AGN 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 ---------------------------------------------------------------------------------------- --- Wed 4 Jun 2014 Day 155 --- 15 35 00 1228+126 08 53 32 30.8 112.2 -3.6 0.0 19 222 15 35 00 15 54 30 --- 09 13 05 33.5 116.8 -3.3 0.0 1170 260 15 35 04 ---------- L-band GRT-only VLBI scans - segment 05L ---------- 15 55 30 1236+077 09 14 05 28.4 118.1 -3.4 0.0 31 260 15 55 30 15 58 00 --- 09 16 35 28.7 118.7 -3.4 0.0 150 264 15 55 34 15 59 10 1228+126 09 17 46 34.1 118.0 -3.2 0.0 41 264 15 59 10 16 08 00 --- 09 26 37 35.3 120.2 -3.1 0.0 530 281 15 59 14 ---------- Allow time for Kalyazin and Evpatoria to change source ---------- 16 08 30 1228+126 09 27 07 35.3 120.3 -3.1 0.0 19 281 16 08 30 16 18 00 --- 09 36 39 36.6 122.8 -2.9 0.0 570 300 16 08 34 16 19 00 1236+077 09 37 39 31.4 123.8 -3.0 0.0 31 300 16 19 00 16 21 30 --- 09 40 09 31.7 124.5 -3.0 0.0 150 304 16 19 04 16 22 30 1222+037 09 41 09 30.1 130.7 -2.7 0.0 34 304 16 22 30 16 25 30 --- 09 44 10 30.4 131.4 -2.7 0.0 180 310 16 22 34 16 27 00 1228+126 09 45 40 37.7 125.1 -2.8 0.0 47 310 16 27 00 16 35 30 --- 09 54 11 38.7 127.4 -2.6 0.0 510 327 16 27 04 16 36 00 1228+126 09 54 42 38.8 127.6 -2.6 0.0 19 327 16 36 00 16 45 30 --- 10 04 13 39.9 130.2 -2.5 0.0 570 345 16 36 04 16 46 40 1236+077 10 05 23 34.7 131.0 -2.6 0.0 41 345 16 46 40 16 49 10 --- 10 07 54 35.0 131.7 -2.5 0.0 150 350 16 46 44 16 50 20 1228+126 10 09 04 40.5 131.6 -2.4 0.0 41 350 16 50 20 16 59 20 --- 10 18 05 41.5 134.2 -2.2 0.0 540 367 16 50 24 ---------- Space segment 05: L-band VLBI scans ---------- 17 00 00 1228+126 10 18 46 41.5 134.4 -2.2 0.0 29 367 17 00 00 17 19 30 --- 10 38 19 43.5 140.3 -1.9 0.0 1170 404 17 00 04 17 20 00 1228+126 10 38 49 43.6 140.4 -1.9 0.0 19 404 17 20 00 17 39 30 --- 10 58 22 45.3 146.7 -1.6 0.0 1170 442 17 20 04 Schedule for WSTRBORK (Code Wb ) Page 4 The nuclear structure in nearby AGN 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 ---------------------------------------------------------------------------------------- --- Wed 4 Jun 2014 Day 155 --- ---------- L-band GRT-only VLBI scans - segment 06L ---------- 17 40 40 1236+077 10 59 32 40.1 146.6 -1.7 0.0 41 442 17 40 40 17 43 10 --- 11 02 03 40.3 147.3 -1.6 0.0 150 447 17 40 44 17 44 20 1228+126 11 03 13 45.7 148.2 -1.5 0.0 41 447 17 44 20 17 53 10 --- 11 12 04 46.4 151.2 -1.3 0.0 530 464 17 44 24 ---------- Allow time for Kalyazin and Evpatoria to change source ---------- 17 53 40 1228+126 11 12 34 46.4 151.4 -1.3 0.0 19 464 17 53 40 18 03 10 --- 11 22 06 47.1 154.6 -1.2 0.0 570 482 17 53 44 18 04 20 1236+077 11 23 16 41.9 154.0 -1.3 0.0 41 482 18 04 20 18 06 50 --- 11 25 46 42.1 154.8 -1.2 0.0 150 487 18 04 24 18 07 50 1222+037 11 26 47 39.0 160.9 -1.0 0.0 34 487 18 07 50 18 10 50 --- 11 29 47 39.2 161.9 -0.9 0.0 180 493 18 07 54 18 11 40 1226+023 11 30 37 37.6 161.2 -1.0 0.0 32 493 18 11 40 18 20 00 --- 11 38 59 38.0 163.8 -0.8 0.0 500 509 18 11 44 18 21 40 1228+126 11 40 39 48.1 161.2 -0.8 0.0 53 509 18 21 40 18 30 10 --- 11 49 10 48.5 164.3 -0.7 0.0 510 525 18 21 44 18 30 40 1228+126 11 49 40 48.5 164.4 -0.7 0.0 19 525 18 30 40 18 40 10 --- 11 59 12 48.9 167.9 -0.5 0.0 570 543 18 30 44 18 41 20 1236+077 12 00 22 43.8 166.3 -0.7 0.0 41 543 18 41 20 18 43 50 --- 12 02 53 43.9 167.1 -0.6 0.0 150 548 18 41 24 ---------- Space segment 06: L-band VLBI scans ---------- 18 45 00 1228+126 12 04 03 49.0 169.7 -0.5 0.0 41 548 18 45 00 19 04 30 --- 12 23 36 49.4 177.0 -0.1 0.0 1170 586 18 45 04 19 05 00 1228+126 12 24 06 49.4 177.2 -0.1 0.0 19 586 19 05 00 19 24 30 --- 12 43 39 49.3 184.5 0.2 0.0 1170 623 19 05 04 ---------- L-band GRT-only VLBI scans - segment 07L ---------- 19 25 30 1236+077 12 44 39 44.5 181.6 0.1 0.0 31 623 19 25 30 19 28 00 --- 12 47 10 44.5 182.4 0.1 0.0 150 628 19 25 34 Schedule for WSTRBORK (Code Wb ) Page 5 The nuclear structure in nearby AGN 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 ---------------------------------------------------------------------------------------- --- Wed 4 Jun 2014 Day 155 --- 19 29 00 1228+126 12 48 10 49.3 186.2 0.3 0.0 31 628 19 29 00 19 38 00 --- 12 57 11 49.1 189.6 0.4 0.0 540 645 19 29 04 ---------- Allow time for Kalyazin and Evpatoria to change source ---------- 19 38 30 1228+126 12 57 42 49.1 189.8 0.4 0.0 19 645 19 38 30 19 48 00 --- 13 07 13 48.8 193.3 0.6 0.0 570 663 19 38 34 19 49 00 1236+077 13 08 13 44.2 189.7 0.5 0.0 31 663 19 49 00 19 51 30 --- 13 10 44 44.1 190.6 0.5 0.0 150 668 19 49 04 19 52 30 1222+037 13 11 44 39.6 195.0 0.8 0.0 34 668 19 52 30 19 55 30 --- 13 14 44 39.5 196.0 0.8 0.0 180 674 19 52 34 19 57 00 1228+126 13 16 15 48.4 196.6 0.7 0.0 47 674 19 57 00 20 05 30 --- 13 24 46 48.0 199.6 0.9 0.0 510 690 19 57 04 20 06 00 1228+126 13 25 16 48.0 199.8 0.9 0.0 19 690 20 06 00 20 15 30 --- 13 34 48 47.5 203.2 1.1 0.0 570 709 20 06 04 20 16 30 1236+077 13 35 48 43.1 199.1 0.9 0.0 31 709 20 16 30 20 19 00 --- 13 38 18 43.0 199.9 1.0 0.0 150 713 20 16 34 20 20 00 1228+126 13 39 18 47.2 204.8 1.1 0.0 31 713 20 20 00 20 29 20 --- 13 48 40 46.6 208.0 1.3 0.0 560 731 20 20 04 ---------- Space segment 07: L-band VLBI scans ---------- 20 30 00 1228+126 13 49 20 46.5 208.2 1.3 0.0 29 731 20 30 00 20 49 30 --- 14 08 53 45.0 214.7 1.6 0.0 1170 769 20 30 04 20 50 00 1228+126 14 09 23 44.9 214.8 1.6 0.0 19 769 20 50 00 21 09 30 --- 14 28 56 43.1 221.0 2.0 0.0 1170 806 20 50 04 ---------- L-band GRT-only VLBI scans - segment 08L ---------- 21 10 30 1236+077 14 29 57 39.3 216.2 1.8 0.0 31 806 21 10 30 21 13 00 --- 14 32 27 39.1 217.0 1.9 0.0 150 811 21 10 34 21 14 00 1228+126 14 33 27 42.7 222.4 2.0 0.0 31 811 21 14 00 21 24 00 --- 14 43 29 41.6 225.4 2.2 0.0 600 830 21 14 04 Schedule for WSTRBORK (Code Wb ) Page 6 The nuclear structure in nearby AGN 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 ---------------------------------------------------------------------------------------- --- Wed 4 Jun 2014 Day 155 --- ---------- Allow time for Kalyazin and Evpatoria to change source ---------- 21 24 30 1228+126 14 43 59 41.6 225.5 2.2 0.0 19 830 21 24 30 21 34 00 --- 14 53 31 40.5 228.3 2.4 0.0 570 849 21 24 34 21 35 00 1236+077 14 54 31 37.0 223.4 2.2 0.0 31 849 21 35 00 21 37 30 --- 14 57 01 36.7 224.1 2.3 0.0 150 854 21 35 04 21 38 30 1222+037 14 58 01 31.4 226.2 2.5 0.0 34 854 21 38 30 21 41 30 --- 15 01 02 31.1 227.0 2.6 0.0 180 859 21 38 34 21 43 00 1228+126 15 02 32 39.5 230.8 2.5 0.0 47 859 21 43 00 21 51 30 --- 15 11 03 38.5 233.1 2.7 0.0 510 876 21 43 04 21 52 00 1228+126 15 11 33 38.4 233.3 2.7 0.0 19 876 21 52 00 22 01 30 --- 15 21 05 37.2 235.8 2.8 0.0 570 894 21 52 04 22 02 30 1236+077 15 22 05 33.9 230.9 2.7 0.0 31 894 22 02 30 22 05 00 --- 15 24 36 33.6 231.5 2.7 0.0 150 899 22 02 34 22 06 00 1228+126 15 25 36 36.7 237.0 2.9 0.0 31 899 22 06 00 22 14 30 --- 15 34 07 35.6 239.2 3.0 0.0 510 915 22 06 04 22 15 00 1228+126 15 34 37 35.5 239.3 3.1 0.0 19 915 22 15 00 22 20 30 --- 15 40 08 34.8 240.7 3.1 0.0 330 926 22 15 04 22 21 30 1236+077 15 41 08 31.6 235.8 3.0 0.0 31 926 22 21 30 22 24 00 --- 15 43 39 31.3 236.4 3.1 0.0 150 930 22 21 34 ---------- Space segment 08: L-band VLBI scans ---------- 22 25 00 1228+126 15 44 39 34.2 241.8 3.2 0.0 31 930 22 25 00 22 44 30 --- 16 04 12 31.6 246.6 3.5 0.0 1170 968 22 25 04 22 45 00 1228+126 16 04 42 31.5 246.7 3.6 0.0 19 968 22 45 00 23 04 30 --- 16 24 15 28.7 251.2 3.9 0.0 1170 1005 22 45 04 23 05 00 1228+126 16 24 45 28.7 251.3 3.9 0.0 19 1005 23 05 00 23 24 30 --- 16 44 19 25.8 255.7 4.2 0.0 1170 1043 23 05 04 ---------- L-band GRT-only VLBI scans - segment 09L ---------- 23 26 30 1236+077 16 46 19 22.8 251.1 4.1 0.0 91 1043 23 26 30 23 29 00 --- 16 48 49 22.5 251.6 4.1 0.0 150 1048 23 26 34 Schedule for WSTRBORK (Code Wb ) Page 7 The nuclear structure in nearby AGN 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 ---------------------------------------------------------------------------------------- --- Wed 4 Jun 2014 Day 155 --- 23 30 00 1228+126 16 49 50 25.0 256.8 4.3 0.0 31 1048 23 30 00 23 31 00 --- 16 50 50 24.9 257.1 4.3 0.0 60 1050 23 30 04 23 31 20 1228+126 16 51 10 24.8 257.1 4.3 0.0 9 1050 23 31 20 23 41 20 --- 17 01 11 23.4 259.3 4.5 0.0 600 1069 23 31 24 23 41 40 1228+126 17 01 31 23.3 259.3 4.5 0.0 9 1069 23 41 40 23 51 20 --- 17 11 13 21.9 261.4 4.7 0.0 580 1087 23 41 44 23 52 20 1236+077 17 12 13 19.1 256.7 4.5 0.0 31 1087 23 52 20 23 54 50 --- 17 14 44 18.7 257.2 4.6 0.0 150 1092 23 52 24 23 56 00 1222+037 17 15 54 13.2 258.0 4.8 0.0 44 1092 23 56 00 23 59 00 --- 17 18 54 12.7 258.6 4.9 0.0 180 1098 23 56 04 --- Thu 5 Jun 2014 Day 156 --- 00 00 00 1226+023 17 19 55 12.0 257.1 4.8 0.0 42 1098 00 00 00 00 09 00 --- 17 28 56 10.7 258.9 5.0 0.0 540 1115 00 00 04 00 10 30 1228+126 17 30 26 19.0 265.3 5.0 0.0 43 1115 00 10 30 00 13 00 --- 17 32 57 18.6 265.8 5.0 0.0 150 1120 00 10 34 00 13 20 1228+126 17 33 17 18.6 265.9 5.0 0.0 9 1120 00 13 20 00 23 30 --- 17 43 28 17.0 268.0 5.2 0.0 610 1140 00 13 24 00 23 50 1228+126 17 43 48 17.0 268.0 5.2 0.0 9 1140 00 23 50 00 33 30 --- 17 53 30 15.5 270.0 5.4 0.0 580 1158 00 23 54 00 33 50 1228+126 17 53 50 15.5 270.0 5.4 0.0 9 1158 00 33 50 00 43 30 --- 18 03 32 14.0 272.0 5.5 0.0 580 1177 00 33 54 00 45 00 1236+077 18 05 02 11.2 267.5 5.4 0.0 61 1177 00 45 00 00 47 30 --- 18 07 32 10.8 268.0 5.5 0.0 150 1182 00 45 04 00 48 40 1222+037 18 08 43 5.3 268.7 5.7 0.0 44 1182 00 48 40 00 51 40 --- 18 11 43 4.8 269.3 5.8 0.0 180 1187 00 48 44 00 53 00 1228+126 18 13 03 12.6 273.9 5.7 0.0 37 1187 00 53 00 01 01 40 --- 18 21 45 11.3 275.6 5.8 0.0 520 1204 00 53 04 01 02 00 1228+126 18 22 05 11.2 275.6 5.8 0.0 9 1204 01 02 00 01 11 40 --- 18 31 46 9.8 277.5 6.0 D 0.0 0 1223 01 02 04 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: ra18cm2.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: 26 Station: WSTRBORK Total bit rate: 256 Format: MARK5B Bits per sample: 2 Sample rate: 32.000 Number of channels: 4 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 1510.00 1510.00 1510.00 1510.00 Net SB= U U L L IF SB = U U U U Pol. = LCP RCP LCP RCP BBC = 2 1 2 1 BBC SB= U U L L IF = 2N 1N 2N 1N The following frequency sets based on these setups were used. Frequency Set: 17 Setup file default. Used with PCAL = 1MHz LO sum= 1668.00 1668.00 1668.00 1668.00 BBC fr= 158.00 158.00 158.00 158.00 Bandwd= 16.00 16.00 16.00 16.00 Matching frequency sets: 17 Track assignments are: track1= 4, 2, 8, 6 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 41.923521 0.00 85 16 41.77889 * 85 00 00.00000 84 55 27.17430 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 09.440650 0.10 * 1236+077 07 46 45.39997 * 07 30 17.18902 07 25 31.24531 0.11 J1239+07 From catalog imbedded in main SCHED input file. rfc_2012b Petrov, 2012, unpublished 1855 observations J1224+0330 12 22 19.097169 * 12 24 52.421935 12 25 37.543272 0.11 * 1222+037 03 47 27.06583 * 03 30 50.29268 03 25 59.94064 0.13 J1224+03 From catalog imbedded in main SCHED input file. rfc_2012b Petrov, 2012, unpublished 688 observations * 1226+023 12 26 33.245835 * 12 29 06.699731 12 29 51.900411 0.00 J1229+0203 02 19 43.30547 * 02 03 08.59797 01 58 18.56773 0.00 3C273B ./gs032d_sources.radioastron 3C273 AGN, rfc_2013d Petrov, 2013, unpublished 32011 observations * 1228+126 12 28 17.569280 * 12 30 49.423382 12 31 34.048480 0.00 J1230+1223 12 40 01.74883 * 12 23 28.04365 12 18 41.71051 0.00 3C274 ./gs032d_sources.radioastron M87 AGN, rfc_2013d Petrov, 2013, unpublished 55201 observations VIR-A 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 ra18cm2.set 8 5.525 0.000 1236+077 ra18cm2.set 1 2 3 4 6 7 8 13 14 15 16 1 + 1.192 78.475 1222+037 ra18cm2.set 1 2 3 4 6 7 13 14 15 16 17 + 0.483 28.442 1226+023 ra18cm2.set 1 2 3 4 6 7 8 13 14 15 16 1 + 0.589 40.489 1228+126 ra18cm2.set 1 2 3 4 6 7 8 13 14 15 16 1 + 12.719 1103.989 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 69.1 1236+077 111.8 1222+037 110.4 1226+023 112.0 1228+126 107.7 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