COVER INFORMATION Station: GBT_VLBA (Code Gb ) Experiment: Probing the innermost regions of AGN jets and their magnetic fields Exp. Code: gl038a Schedule Version: 1.10 Processed by SCHED version: 11.10 Version 11.1 Beta of about April 26, 201 PI: Andrei Lobanov Address: MPIfR Bonn Auf dem Huegel 69 53121 Bonn, Germany Phone: +49 228 525 191 EMAIL: alobanov@mpifr-bonn.mpg.de Fax: +49 228 525 229 Phone during observation: +7 903 661 48 65 Observing mode: L-band, dual-pol Notes: L-band, Radioastron-compatible frequency setup P-CAL is ON Tsys is ON, auto-level (AGC) is ON Please, send Mk5 disk packs to MPIfR-Bonn Schedule for GBT_VLBA (Code Gb ) Page 2 Probing the innermost regions of AGN jets and their magnetic fields 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 ---------------------------------------------------------------------------------------- --- Thu 24 Oct 2013 Day 297 --- ---------- Segment 01: L-band VLBI scans ---------- Next scan frequencies: 1668.00 1668.00 1668.00 1668.00 Next BBC frequencies: 732.00 732.00 732.00 732.00 Next scan bandwidths: 16.00 16.00 16.00 16.00 22 20 00 0836+710 19 14 33 20.4 -7.6 10.5 18.3 0 0 22 20 00 22 29 30 --- 19 24 04 20.2 -6.8 10.7 16.3 570 18 22 20 01 22 30 00 0836+710 19 24 34 20.2 -6.7 10.7 16.2 10 18 22 30 00 22 39 30 --- 19 34 06 20.0 -5.9 10.9 14.2 570 37 22 30 01 22 40 00 0836+710 19 34 36 20.0 -5.9 10.9 14.1 10 37 22 40 00 22 49 30 --- 19 44 08 19.8 -5.1 11.0 12.2 570 55 22 40 01 22 50 00 0836+710 19 44 38 19.8 -5.0 11.0 12.1 10 55 22 50 00 22 59 30 --- 19 54 09 19.6 -4.2 11.2 10.1 570 73 22 50 01 23 00 00 0836+710 19 54 39 19.6 -4.2 11.2 10.0 10 73 23 00 00 23 10 00 --- 20 04 41 19.5 -3.3 11.4 7.9 600 92 23 00 01 ---------- GROUND ONLY: L-band VLBI scans: Block 01 ---------- 23 10 30 0836+710 20 05 11 19.5 -3.3 11.4 7.8 10 92 23 10 30 23 20 00 --- 20 14 43 19.4 -2.4 11.5 5.8 570 111 23 10 31 23 20 30 0836+710 20 15 13 19.4 -2.4 11.5 5.7 10 111 23 20 30 23 30 00 --- 20 24 44 19.3 -1.6 11.7 3.7 570 129 23 20 31 --- Fri 25 Oct 2013 Day 298 --- 00 31 00 0836+710 21 25 54 19.5 3.7-11.3 -8.9 3638 129 00 31 00 00 40 30 --- 21 35 26 19.7 4.6-11.1 -10.9 570 147 00 31 01 00 41 00 0836+710 21 35 56 19.7 4.6-11.1 -11.0 10 147 00 41 00 00 50 30 --- 21 45 27 19.9 5.4-11.0 -13.0 570 165 00 41 01 00 51 00 0836+710 21 45 57 19.9 5.5-10.9 -13.1 10 165 00 51 00 01 00 30 --- 21 55 29 20.1 6.3-10.8 -15.1 570 184 00 51 01 01 01 00 0836+710 21 55 59 20.1 6.3-10.8 -15.2 10 184 01 01 00 01 11 00 --- 22 06 01 20.3 7.1-10.6 -17.3 600 203 01 01 01 Schedule for GBT_VLBA (Code Gb ) Page 3 Probing the innermost regions of AGN jets and their magnetic fields 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 ---------------------------------------------------------------------------------------- --- Fri 25 Oct 2013 Day 298 --- ---------- Segment 03: L-band VLBI scans ---------- 02 18 00 0836+710 23 13 12 22.5 12.5 -9.5 -31.2 3998 203 02 18 00 02 27 30 --- 23 22 43 23.0 13.2 -9.3 -33.1 570 221 02 18 01 02 28 00 0836+710 23 23 13 23.0 13.3 -9.3 -33.2 10 221 02 28 00 02 37 30 --- 23 32 45 23.4 14.0 -9.2 -35.2 570 239 02 28 01 02 38 00 0836+710 23 33 15 23.5 14.0 -9.2 -35.3 10 239 02 38 00 02 47 30 --- 23 42 47 23.9 14.7 -9.0 -37.3 570 258 02 38 01 02 48 00 0836+710 23 43 17 23.9 14.7 -9.0 -37.4 10 258 02 48 00 02 57 30 --- 23 52 48 24.4 15.4 -8.8 -39.4 570 276 02 48 01 02 58 00 0836+710 23 53 18 24.4 15.4 -8.8 -39.5 10 276 02 58 00 03 08 00 --- 00 03 20 25.0 16.1 -8.7 -41.6 600 295 02 58 01 ---------- GROUND ONLY: L-band VLBI scans: Block 03 ---------- 03 08 30 0836+710 00 03 50 25.0 16.2 -8.6 -41.7 10 295 03 08 30 03 14 00 --- 00 09 21 25.3 16.5 -8.6 -42.8 330 306 03 08 31 03 14 30 0836+710 00 09 51 25.3 16.6 -8.5 -42.9 10 306 03 14 30 03 24 00 --- 00 19 23 25.9 17.2 -8.4 -44.9 570 324 03 14 31 03 24 30 0836+710 00 19 53 25.9 17.2 -8.4 -45.0 10 324 03 24 30 03 34 00 --- 00 29 24 26.5 17.8 -8.2 -47.0 570 342 03 24 31 03 34 30 0836+710 00 29 54 26.5 17.9 -8.2 -47.1 10 342 03 34 30 03 44 00 --- 00 39 26 27.1 18.5 -8.1 -49.1 570 361 03 34 31 03 44 30 0836+710 00 39 56 27.1 18.5 -8.0 -49.2 10 361 03 44 30 03 54 00 --- 00 49 28 27.7 19.0 -7.9 -51.2 570 379 03 44 31 03 54 30 0836+710 00 49 58 27.8 19.1 -7.9 -51.3 10 379 03 54 30 04 04 00 --- 00 59 29 28.4 19.6 -7.7 -53.3 570 397 03 54 31 04 04 30 0836+710 00 59 59 28.4 19.6 -7.7 -53.4 10 397 04 04 30 04 14 00 --- 01 09 31 29.0 20.2 -7.6 -55.4 570 415 04 04 31 ---------- Segment 04: L-band VLBI scans ---------- 04 15 00 0836+710 01 10 31 29.1 20.2 -7.5 -55.6 40 415 04 15 00 04 24 30 --- 01 20 03 29.8 20.7 -7.4 -57.6 570 434 04 15 01 Schedule for GBT_VLBA (Code Gb ) Page 4 Probing the innermost regions of AGN jets and their magnetic fields 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 ---------------------------------------------------------------------------------------- --- Fri 25 Oct 2013 Day 298 --- 04 25 00 0836+710 01 20 33 29.8 20.7 -7.4 -57.7 10 434 04 25 00 04 34 30 --- 01 30 04 30.5 21.2 -7.2 -59.7 570 452 04 25 01 04 35 00 0836+710 01 30 34 30.5 21.2 -7.2 -59.8 10 452 04 35 00 04 44 30 --- 01 40 06 31.2 21.7 -7.0 -61.8 570 470 04 35 01 04 45 00 0836+710 01 40 36 31.2 21.7 -7.0 -61.9 10 470 04 45 00 04 54 30 --- 01 50 07 31.9 22.1 -6.9 -64.0 570 488 04 45 01 04 55 00 0836+710 01 50 38 31.9 22.1 -6.9 -64.1 10 488 04 55 00 05 05 00 --- 02 00 39 32.7 22.5 -6.7 -66.2 600 508 04 55 01 ---------- GROUND ONLY: L-band VLBI scans: Block 04 ---------- 05 05 30 0836+710 02 01 09 32.7 22.6 -6.7 -66.3 10 508 05 05 30 05 11 00 --- 02 06 40 33.1 22.8 -6.6 -67.5 330 518 05 05 31 05 11 30 0836+710 02 07 10 33.2 22.8 -6.6 -67.6 10 518 05 11 30 05 21 00 --- 02 16 42 33.9 23.1 -6.4 -69.7 570 537 05 11 31 05 21 30 0836+710 02 17 12 34.0 23.2 -6.4 -69.8 10 537 05 21 30 05 31 00 --- 02 26 43 34.7 23.5 -6.3 -71.9 570 555 05 21 31 05 31 30 0836+710 02 27 14 34.7 23.5 -6.3 -72.0 10 555 05 31 30 05 41 00 --- 02 36 45 35.5 23.8 -6.1 -74.1 570 573 05 31 31 05 41 30 0836+710 02 37 15 35.5 23.8 -6.1 -74.2 10 573 05 41 30 05 51 00 --- 02 46 47 36.3 24.0 -5.9 -76.3 570 591 05 41 31 05 51 30 0836+710 02 47 17 36.3 24.0 -5.9 -76.4 10 591 05 51 30 06 01 00 --- 02 56 48 37.1 24.2 -5.8 -78.5 570 610 05 51 31 06 01 30 0836+710 02 57 18 37.1 24.3 -5.8 -78.6 10 610 06 01 30 06 11 00 --- 03 06 50 37.9 24.4 -5.6 -80.8 570 628 06 01 31 ---------- Segment 05: L-band VLBI scans ---------- 06 12 00 0836+710 03 07 50 38.0 24.4 -5.6 -81.0 39 628 06 12 00 06 21 30 --- 03 17 22 38.7 24.6 -5.4 -83.2 570 646 06 12 01 06 22 00 0836+710 03 17 52 38.8 24.6 -5.4 -83.3 10 646 06 22 00 06 31 30 --- 03 27 23 39.6 24.7 -5.3 -85.5 570 664 06 22 01 06 32 00 0836+710 03 27 53 39.6 24.7 -5.2 -85.6 10 664 06 32 00 06 41 30 --- 03 37 25 40.4 24.8 -5.1 -87.8 570 683 06 32 01 Schedule for GBT_VLBA (Code Gb ) Page 5 Probing the innermost regions of AGN jets and their magnetic fields 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 ---------------------------------------------------------------------------------------- --- Fri 25 Oct 2013 Day 298 --- 06 42 00 0836+710 03 37 55 40.4 24.8 -5.1 -87.9 10 683 06 42 00 06 51 30 --- 03 47 27 41.2 24.8 -4.9 -90.2 570 701 06 42 01 06 52 00 0836+710 03 47 57 41.2 24.8 -4.9 -90.3 10 701 06 52 00 07 02 00 --- 03 57 58 42.1 24.7 -4.7 -92.7 600 720 06 52 01 ---------- GROUND ONLY: L-band VLBI scans: Block 05 ---------- 07 02 30 0836+710 03 58 29 42.1 24.7 -4.7 -92.8 10 720 07 02 30 07 08 00 --- 04 03 59 42.6 24.7 -4.6 -94.1 330 731 07 02 31 07 08 30 0836+710 04 04 29 42.6 24.7 -4.6 -94.2 10 731 07 08 30 07 18 00 --- 04 14 01 43.4 24.6 -4.5 -96.5 570 749 07 08 31 07 18 30 0836+710 04 14 31 43.4 24.6 -4.5 -96.7 10 749 07 18 30 07 28 00 --- 04 24 03 44.2 24.4 -4.3 -99.0 570 767 07 18 31 07 28 30 0836+710 04 24 33 44.2 24.4 -4.3 -99.1 10 767 07 28 30 07 38 00 --- 04 34 04 45.0 24.2 -4.1 -101.5 570 786 07 28 31 07 38 30 0836+710 04 34 34 45.0 24.2 -4.1 -101.7 10 786 07 38 30 07 48 00 --- 04 44 06 45.8 24.0 -4.0 -104.1 570 804 07 38 31 07 48 30 0836+710 04 44 36 45.8 24.0 -4.0 -104.2 10 804 07 48 30 07 58 00 --- 04 54 08 46.6 23.7 -3.8 -106.7 570 822 07 48 31 07 58 30 0836+710 04 54 38 46.6 23.6 -3.8 -106.8 10 822 07 58 30 08 08 00 --- 05 04 09 47.4 23.3 -3.6 -109.3 570 840 07 58 31 ---------- Segment 06: L-band VLBI scans ---------- 08 09 00 0836+710 05 05 09 47.5 23.3 -3.6 -109.6 39 840 08 09 00 08 18 30 --- 05 14 41 48.2 22.8 -3.5 -112.1 570 859 08 09 01 08 19 00 0836+710 05 15 11 48.2 22.8 -3.5 -112.3 10 859 08 19 00 08 28 30 --- 05 24 43 48.9 22.3 -3.3 -114.9 570 877 08 19 01 08 29 00 0836+710 05 25 13 49.0 22.3 -3.3 -115.0 10 877 08 29 00 08 38 30 --- 05 34 44 49.7 21.8 -3.1 -117.7 570 895 08 29 01 08 39 00 0836+710 05 35 14 49.7 21.8 -3.1 -117.8 10 895 08 39 00 08 48 30 --- 05 44 46 50.4 21.2 -3.0 -120.5 570 913 08 39 01 08 49 00 0836+710 05 45 16 50.4 21.1 -3.0 -120.7 10 913 08 49 00 08 59 00 --- 05 55 18 51.1 20.4 -2.8 -123.6 600 933 08 49 01 Schedule for GBT_VLBA (Code Gb ) Page 6 Probing the innermost regions of AGN jets and their magnetic fields 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 ---------------------------------------------------------------------------------------- --- Fri 25 Oct 2013 Day 298 --- ---------- GROUND ONLY: L-band VLBI scans: Block 06 ---------- 08 59 30 0836+710 05 55 48 51.2 20.4 -2.8 -123.7 10 933 08 59 30 09 05 00 --- 06 01 19 51.5 20.0 -2.7 -125.3 330 943 08 59 31 09 05 30 0836+710 06 01 49 51.6 19.9 -2.7 -125.5 10 943 09 05 30 09 15 00 --- 06 11 20 52.2 19.2 -2.5 -128.3 570 962 09 05 31 09 15 30 0836+710 06 11 50 52.2 19.1 -2.5 -128.5 10 962 09 15 30 09 25 00 --- 06 21 22 52.8 18.3 -2.4 -131.4 570 980 09 15 31 09 25 30 0836+710 06 21 52 52.9 18.3 -2.3 -131.5 10 980 09 25 30 09 35 00 --- 06 31 24 53.4 17.4 -2.2 -134.5 570 998 09 25 31 09 35 30 0836+710 06 31 54 53.5 17.3 -2.2 -134.7 9 998 09 35 30 09 45 00 --- 06 41 25 54.0 16.4 -2.0 -137.7 570 1016 09 35 31 09 45 30 0836+710 06 41 55 54.0 16.3 -2.0 -137.8 9 1016 09 45 30 09 55 00 --- 06 51 27 54.5 15.3 -1.9 -140.9 570 1035 09 45 31 09 55 30 0836+710 06 51 57 54.6 15.3 -1.8 -141.1 9 1035 09 55 30 10 05 00 --- 07 01 28 55.0 14.2 -1.7 -144.2 570 1053 09 55 31 ---------- Segment 07: L-band VLBI scans ---------- 10 06 00 0836+710 07 02 29 55.1 14.1 -1.7 -144.5 39 1053 10 06 00 10 15 30 --- 07 12 00 55.5 12.9 -1.5 -147.7 570 1071 10 06 01 10 16 00 0836+710 07 12 30 55.5 12.9 -1.5 -147.9 9 1071 10 16 00 10 25 30 --- 07 22 02 55.9 11.7 -1.3 -151.1 570 1089 10 16 01 10 26 00 0836+710 07 22 32 56.0 11.6 -1.3 -151.3 9 1089 10 26 00 10 35 30 --- 07 32 03 56.3 10.4 -1.2 -154.6 570 1108 10 26 01 10 36 00 0836+710 07 32 34 56.3 10.3 -1.2 -154.8 9 1108 10 36 00 10 45 30 --- 07 42 05 56.6 9.0 -1.0 -158.1 570 1126 10 36 01 10 46 00 0836+710 07 42 35 56.7 8.9 -1.0 -158.3 9 1126 10 46 00 10 56 00 --- 07 52 37 56.9 7.5 -0.8 -161.8 600 1145 10 46 01 ---------- GROUND ONLY: L-band VLBI scans: Block 07 ---------- 10 56 30 0836+710 07 53 07 57.0 7.4 -0.8 -162.0 9 1145 10 56 30 11 02 00 --- 07 58 38 57.1 6.6 -0.7 -164.0 330 1156 10 56 31 Schedule for GBT_VLBA (Code Gb ) Page 7 Probing the innermost regions of AGN jets and their magnetic fields 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 ---------------------------------------------------------------------------------------- --- Fri 25 Oct 2013 Day 298 --- 11 02 30 0836+710 07 59 08 57.1 6.6 -0.7 -164.2 9 1156 11 02 30 11 12 00 --- 08 08 39 57.3 5.2 -0.6 -167.6 570 1174 11 02 31 11 12 30 0836+710 08 09 10 57.3 5.1 -0.6 -167.8 9 1174 11 12 30 11 22 00 --- 08 18 41 57.4 3.7 -0.4 -171.2 570 1192 11 12 31 11 22 30 0836+710 08 19 11 57.4 3.6 -0.4 -171.4 9 1192 11 22 30 11 32 00 --- 08 28 43 57.5 2.2 -0.2 -174.9 570 1211 11 22 31 11 32 30 0836+710 08 29 13 57.5 2.1 -0.2 -175.0 9 1211 11 32 30 11 42 00 --- 08 38 44 57.6 0.6 -0.1 -178.5 570 1229 11 32 31 11 42 30 0836+710 08 39 15 57.6 0.5 -0.1 -178.7 9 1229 11 42 30 11 52 00 --- 08 48 46 57.6 -0.9 0.1 177.8 570 1247 11 42 31 11 52 30 0836+710 08 49 16 57.6 -1.0 0.1 177.6 9 1247 11 52 30 12 02 00 --- 08 58 48 57.5 -2.4 0.3 174.2 570 1265 11 52 31 ---------- Segment 08: L-band VLBI scans ---------- 12 03 00 0836+710 08 59 48 57.5 -2.6 0.3 173.8 39 1265 12 03 00 12 12 30 --- 09 09 19 57.4 -4.0 0.4 170.3 570 1284 12 03 01 12 13 00 0836+710 09 09 50 57.4 -4.1 0.5 170.1 9 1284 12 13 00 12 22 30 --- 09 19 21 57.2 -5.5 0.6 166.7 570 1302 12 13 01 12 23 00 0836+710 09 19 51 57.2 -5.6 0.6 166.5 9 1302 12 23 00 12 32 30 --- 09 29 23 57.0 -7.0 0.8 163.1 570 1320 12 23 01 12 33 00 0836+710 09 29 53 57.0 -7.1 0.8 162.9 9 1320 12 33 00 12 42 30 --- 09 39 24 56.8 -8.4 0.9 159.5 570 1338 12 33 01 12 43 00 0836+710 09 39 54 56.8 -8.5 1.0 159.4 9 1338 12 43 00 12 53 00 --- 09 49 56 56.4 -9.9 1.1 155.8 600 1358 12 43 01 ---------- GROUND ONLY: L-band VLBI scans: Block 08 ---------- 12 53 30 0836+710 09 50 26 56.4 -9.9 1.1 155.7 9 1358 12 53 30 12 59 00 --- 09 55 57 56.2 -10.7 1.2 153.7 330 1368 12 53 31 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: ra18cm2.set Matching groups in ./gl038a.freq.sess313rdbe.dat: g20cm_2 LO1=4.632, LO2=12.732, LO3=10.5 Setup group: 1 Station: GBT_VLBA Total bit rate: 256 Format: MARK5B Bits per sample: 2 Sample rate: 32.000 Number of channels: 4 DBE type: RDBE_DDC Speedup factor: 1.00 Disk used to record data. 1st LO= 2400.00 2400.00 2400.00 2400.00 Net SB= L L U U IF SB = L L L L Pol. = RCP LCP RCP LCP BBC = 1 2 3 4 BBC SB= U U L L IF = A C A C The following frequency sets based on these setups were used. Frequency Set: 1 Setup file default. LO sum= 1668.00 1668.00 1668.00 1668.00 BBC fr= 732.00 732.00 732.00 732.00 Bandwd= 16.00 16.00 16.00 16.00 Matching frequency sets: 1 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 25.374091 0.00 85 16 41.77889 * 85 00 00.00000 84 55 09.02682 0.00 From catalog imbedded in main SCHED input file. fake circumpolar target for a TS to look at J0841+7053 08 36 21.556645 * 08 41 24.365283 08 42 47.118679 0.31 * 0836+710 71 04 22.42740 * 70 53 42.17302 70 50 18.47640 0.10 J0841+70 ./gl038a.sources.vlba rfc_2012b Petrov, 2012, unpublished 4322 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 FAKERA ra18cm2.set 22 6.883 0.000 0836+710 ra18cm2.set 1 2 3 4 5 6 7 8 11 12 13 22 + 14.333 3318.856 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 97.7 0836+710 98.0 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