COVER INFORMATION Station: BADARY (Code Bd ) Experiment: Phase-referencing of NGC4418 Exp. Code: EV019B Schedule Version: 1.00 Processed by SCHED version: 11.00 Release of Feb. 15, 2013 PI: Eskil Varenius Address: Chalmers University of Technology Onsala Space Observatory 34992 Onsla Sweden Phone: +46 31 7725545 EMAIL: varenius@chalmers.se Fax: N/A Phone during observation: +46 70 6755341 Observing mode: Phase-referencing of NGC4418 at 6cm (1 Gb/s) Notes: Part of EV019; See also exp. EV019A at L-band. Schedule for BADARY (Code Bd ) Page 2 Phase-referencing of NGC4418 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 6 Mar 2014 Day 65 --- Next scan frequencies: 4942.49 4942.49 4942.49 4942.49 4974.49 4974.49 4974.49 4974.49 5006.49 5006.49 5006.49 5006.49 5038.49 5038.49 5038.49 5038.49 Next BBC frequencies: 442.49 442.49 442.49 442.49 474.49 474.49 474.49 474.49 506.49 506.49 506.49 506.49 538.49 538.49 538.49 538.49 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 19 30 00 J1232 13 16 44 35.0 553.4 0.7 8.3 0 0 19 30 00 19 31 00 --- 13 17 44 34.9 553.7 0.7 8.5 60 8 19 30 01 19 31 29 NGC4418 13 18 14 36.2 555.7 0.8 9.7 12 8 19 31 29 19 35 29 --- 13 22 14 36.0 557.0 0.9 10.4 240 38 19 31 30 19 35 59 J1232 13 22 44 34.7 555.2 0.8 9.4 12 38 19 35 59 19 36 59 --- 13 23 44 34.7 555.5 0.8 9.6 60 46 19 36 00 19 37 28 NGC4418 13 24 13 35.9 557.6 0.9 10.8 12 46 19 37 28 19 41 28 --- 13 28 14 35.7 558.8 1.0 11.5 240 77 19 37 29 19 41 57 J1232 13 28 43 34.5 557.0 0.9 10.5 12 77 19 41 57 19 42 57 --- 13 29 43 34.4 557.3 0.9 10.6 60 85 19 41 58 19 43 26 NGC4418 13 30 13 35.6 559.4 1.0 11.8 12 85 19 43 26 19 47 26 --- 13 34 13 35.4 560.6 1.1 12.6 240 115 19 43 27 19 47 56 J1232 13 34 43 34.2 558.8 1.0 11.5 12 115 19 47 56 19 48 56 --- 13 35 43 34.1 559.1 1.0 11.7 60 123 19 47 57 19 49 25 NGC4418 13 36 12 35.3 561.2 1.1 12.9 12 123 19 49 25 19 53 25 --- 13 40 13 35.1 562.4 1.2 13.6 240 154 19 49 26 19 53 54 J1232 13 40 42 33.9 560.6 1.1 12.6 12 154 19 53 54 19 54 54 --- 13 41 43 33.8 560.9 1.1 12.8 60 162 19 53 55 19 55 23 NGC4418 13 42 12 35.0 562.9 1.2 14.0 12 162 19 55 23 19 59 23 --- 13 46 13 34.7 564.1 1.3 14.7 240 192 19 55 24 19 59 53 J1232 13 46 42 33.5 562.3 1.2 13.6 12 192 19 59 53 20 00 53 --- 13 47 42 33.5 562.6 1.2 13.8 60 200 19 59 54 20 01 22 NGC4418 13 48 11 34.6 564.7 1.3 15.0 12 200 20 01 22 20 05 22 --- 13 52 12 34.3 565.9 1.4 15.7 240 231 20 01 23 20 05 51 J1232 13 52 41 33.2 564.1 1.3 14.6 12 231 20 05 51 20 06 51 --- 13 53 42 33.1 564.4 1.3 14.8 60 238 20 05 52 Schedule for BADARY (Code Bd ) Page 3 Phase-referencing of NGC4418 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 6 Mar 2014 Day 65 --- 20 07 20 NGC4418 13 54 11 34.2 566.5 1.4 16.0 12 238 20 07 20 20 11 20 --- 13 58 12 33.9 567.6 1.5 16.7 240 269 20 07 21 20 11 50 J1232 13 58 41 32.8 565.8 1.4 15.6 12 269 20 11 50 20 12 50 --- 13 59 41 32.7 566.1 1.4 15.8 60 277 20 11 51 20 13 19 NGC4418 14 00 10 33.8 568.2 1.5 17.0 12 277 20 13 19 20 17 19 --- 14 04 11 33.5 569.3 1.6 17.7 240 308 20 13 20 20 17 48 J1232 14 04 40 32.4 567.5 1.5 16.6 12 308 20 17 48 20 18 48 --- 14 05 41 32.3 567.8 1.5 16.8 60 315 20 17 49 20 19 17 NGC4418 14 06 10 33.3 569.9 1.6 18.0 11 315 20 19 17 20 23 17 --- 14 10 11 33.0 571.0 1.7 18.6 240 346 20 19 18 20 23 47 J1232 14 10 40 31.9 569.2 1.6 17.6 12 346 20 23 47 20 24 47 --- 14 11 40 31.8 569.5 1.6 17.7 60 354 20 23 48 20 25 16 NGC4418 14 12 09 32.8 571.6 1.7 18.9 11 354 20 25 16 20 29 16 --- 14 16 10 32.5 572.7 1.8 19.5 240 385 20 25 17 20 30 00 J1256 14 16 54 29.9 563.1 1.3 14.1 11 385 20 30 00 20 34 00 --- 14 20 55 29.6 564.2 1.4 14.8 240 415 20 30 01 20 34 39 J1232 14 21 34 31.1 572.2 1.8 19.3 9 415 20 34 39 20 35 39 --- 14 22 34 31.0 572.5 1.8 19.4 60 423 20 34 40 20 36 08 NGC4418 14 23 04 31.9 574.6 1.9 20.6 11 423 20 36 08 20 40 08 --- 14 27 04 31.6 575.7 2.0 21.2 240 454 20 36 09 20 40 38 J1232 14 27 34 30.5 573.9 1.9 20.2 12 454 20 40 38 20 41 38 --- 14 28 34 30.5 574.1 1.9 20.3 60 462 20 40 39 20 42 07 NGC4418 14 29 03 31.4 576.3 2.0 21.5 11 462 20 42 07 20 46 07 --- 14 33 04 31.0 577.4 2.1 22.1 240 492 20 42 08 20 46 36 J1232 14 33 33 30.0 575.5 2.0 21.1 12 492 20 46 36 20 47 36 --- 14 34 33 29.9 575.7 2.0 21.2 60 500 20 46 37 20 48 05 NGC4418 14 35 03 30.8 577.9 2.1 22.3 11 500 20 48 05 20 52 05 --- 14 39 03 30.4 579.0 2.2 22.9 240 531 20 48 06 20 52 35 J1232 14 39 33 29.5 577.1 2.1 21.9 12 531 20 52 35 20 53 35 --- 14 40 33 29.4 577.3 2.1 22.1 60 538 20 52 36 Schedule for BADARY (Code Bd ) Page 4 Phase-referencing of NGC4418 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 6 Mar 2014 Day 65 --- 20 54 04 NGC4418 14 41 02 30.2 579.5 2.2 23.2 11 538 20 54 04 20 58 04 --- 14 45 03 29.8 580.6 2.3 23.7 240 569 20 54 05 20 58 33 J1232 14 45 32 28.9 578.7 2.2 22.8 12 569 20 58 33 20 59 33 --- 14 46 32 28.8 578.9 2.2 22.9 60 577 20 58 34 21 00 03 NGC4418 14 47 02 29.6 581.1 2.3 24.0 11 577 21 00 03 21 04 03 --- 14 51 02 29.2 582.1 2.4 24.5 240 608 21 00 04 21 04 32 J1232 14 51 32 28.3 580.2 2.3 23.6 12 608 21 04 32 21 05 32 --- 14 52 32 28.2 580.5 2.3 23.7 60 615 21 04 33 21 06 01 NGC4418 14 53 01 29.0 582.7 2.4 24.8 11 615 21 06 01 21 10 01 --- 14 57 02 28.6 583.7 2.5 25.3 240 646 21 06 02 21 10 30 J1232 14 57 31 27.7 581.8 2.4 24.4 12 646 21 10 30 21 11 30 --- 14 58 31 27.6 582.0 2.4 24.5 60 654 21 10 31 21 12 00 NGC4418 14 59 01 28.4 584.2 2.5 25.6 11 654 21 12 00 21 16 00 --- 15 03 01 28.0 585.2 2.6 26.1 240 685 21 12 01 21 16 29 J1232 15 03 31 27.1 583.3 2.5 25.1 12 685 21 16 29 21 17 29 --- 15 04 31 27.0 583.6 2.5 25.3 60 692 21 16 30 21 17 58 NGC4418 15 05 00 27.7 585.7 2.6 26.3 11 692 21 17 58 21 21 58 --- 15 09 01 27.3 586.7 2.7 26.8 240 723 21 17 59 21 22 27 J1232 15 09 30 26.4 584.8 2.6 25.9 12 723 21 22 27 21 23 27 --- 15 10 30 26.3 585.1 2.6 26.0 60 731 21 22 28 21 23 57 NGC4418 15 11 00 27.1 587.2 2.7 27.0 11 731 21 23 57 21 27 57 --- 15 15 00 26.6 588.2 2.8 27.5 240 762 21 23 58 21 28 26 J1232 15 15 30 25.8 586.3 2.7 26.6 12 762 21 28 26 21 29 26 --- 15 16 30 25.7 586.6 2.7 26.7 60 769 21 28 27 21 29 55 NGC4418 15 16 59 26.4 588.7 2.8 27.7 11 769 21 29 55 21 33 55 --- 15 21 00 25.9 589.7 2.9 28.2 240 800 21 29 56 21 34 49 J1256 15 21 54 24.6 580.3 2.4 23.7 21 800 21 34 49 21 38 49 --- 15 25 54 24.2 581.3 2.5 24.2 240 831 21 34 50 21 39 48 J1232 15 26 53 24.5 589.1 2.9 27.9 29 831 21 39 48 21 40 48 --- 15 27 53 24.4 589.4 2.9 28.0 60 838 21 39 49 Schedule for BADARY (Code Bd ) Page 5 Phase-referencing of NGC4418 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 6 Mar 2014 Day 65 --- 21 41 17 NGC4418 15 28 23 25.0 591.5 3.0 29.0 11 838 21 41 17 21 45 17 --- 15 32 23 24.5 592.5 3.1 29.4 240 869 21 41 18 21 45 46 J1232 15 32 53 23.8 590.6 3.0 28.6 12 869 21 45 46 21 46 46 --- 15 33 53 23.6 590.8 3.0 28.7 60 877 21 45 47 21 47 15 NGC4418 15 34 22 24.3 592.9 3.1 29.6 11 877 21 47 15 21 51 15 --- 15 38 23 23.8 593.9 3.2 30.0 240 908 21 47 16 21 51 45 J1232 15 38 52 23.0 592.0 3.1 29.2 12 908 21 51 45 21 52 45 --- 15 39 52 22.9 592.2 3.1 29.3 60 915 21 51 46 21 53 14 NGC4418 15 40 22 23.5 594.4 3.2 30.2 11 915 21 53 14 21 57 14 --- 15 44 22 23.0 595.3 3.3 30.6 240 946 21 53 15 21 57 43 J1232 15 44 52 22.3 593.4 3.2 29.8 12 946 21 57 43 21 58 43 --- 15 45 52 22.2 593.6 3.2 29.9 60 954 21 57 44 21 59 12 NGC4418 15 46 21 22.8 595.8 3.3 30.8 11 954 21 59 12 22 03 12 --- 15 50 22 22.3 596.7 3.4 31.1 240 985 21 59 13 22 03 42 J1232 15 50 51 21.5 594.8 3.3 30.4 12 985 22 03 42 22 04 42 --- 15 51 51 21.4 595.0 3.3 30.5 60 992 22 03 43 22 05 11 NGC4418 15 52 21 22.0 597.2 3.4 31.3 11 992 22 05 11 22 09 11 --- 15 56 21 21.5 598.1 3.5 31.7 240 1023 22 05 12 22 09 40 J1232 15 56 51 20.8 596.2 3.4 31.0 12 1023 22 09 40 22 10 40 --- 15 57 51 20.7 596.4 3.4 31.1 60 1031 22 09 41 22 11 09 NGC4418 15 58 20 21.2 598.5 3.5 31.9 11 1031 22 11 09 22 15 09 --- 16 02 21 20.7 599.4 3.6 32.2 240 1062 22 11 10 22 16 02 J1256 16 03 14 20.1 590.3 3.1 28.6 20 1062 22 16 02 22 20 02 --- 16 07 14 19.6 591.2 3.2 29.0 240 1092 22 16 03 22 20 59 J1232 16 08 12 19.3 598.7 3.6 32.0 28 1092 22 20 59 22 21 59 --- 16 09 12 19.2 599.0 3.6 32.1 60 1100 22 21 00 22 22 29 NGC4418 16 09 41 19.7 601.1 3.7 32.8 11 1100 22 22 29 22 26 29 --- 16 13 42 19.2 602.0 3.8 33.1 240 1131 22 22 30 22 26 58 J1232 16 14 11 18.5 600.1 3.7 32.5 12 1131 22 26 58 22 27 58 --- 16 15 11 18.4 600.3 3.7 32.6 60 1138 22 26 59 Schedule for BADARY (Code Bd ) Page 6 Phase-referencing of NGC4418 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 6 Mar 2014 Day 65 --- 22 28 27 NGC4418 16 15 41 18.9 602.4 3.8 33.3 11 1138 22 28 27 22 32 27 --- 16 19 41 18.3 603.3 3.9 33.6 240 1169 22 28 28 22 32 56 J1232 16 20 11 17.7 601.4 3.8 32.9 12 1169 22 32 56 22 33 56 --- 16 21 11 17.6 601.6 3.8 33.0 60 1177 22 32 57 22 34 26 NGC4418 16 21 40 18.1 603.7 3.9 33.7 11 1177 22 34 26 22 38 26 --- 16 25 41 17.5 604.6 4.0 34.0 240 1208 22 34 27 22 38 55 J1232 16 26 10 16.9 602.7 3.9 33.4 12 1208 22 38 55 22 39 55 --- 16 27 11 16.7 602.9 3.9 33.5 60 1215 22 38 56 22 40 24 NGC4418 16 27 40 17.2 605.0 4.0 34.1 11 1215 22 40 24 22 44 24 --- 16 31 41 16.7 605.9 4.1 34.4 240 1246 22 40 25 22 44 54 J1232 16 32 10 16.1 604.0 4.0 33.8 12 1246 22 44 54 22 45 54 --- 16 33 10 15.9 604.2 4.0 33.9 60 1254 22 44 55 22 46 23 NGC4418 16 33 39 16.4 606.3 4.1 34.5 12 1254 22 46 23 22 50 23 --- 16 37 40 15.8 607.2 4.2 34.8 240 1285 22 46 24 22 50 52 J1232 16 38 09 15.2 605.3 4.1 34.2 12 1285 22 50 52 22 51 52 --- 16 39 10 15.1 605.5 4.1 34.3 60 1292 22 50 53 22 52 21 NGC4418 16 39 39 15.5 607.6 4.2 34.9 12 1292 22 52 21 22 56 21 --- 16 43 40 15.0 608.5 4.3 35.1 240 1323 22 52 22 22 56 51 J1232 16 44 09 14.4 606.6 4.2 34.6 12 1323 22 56 51 22 57 51 --- 16 45 09 14.2 606.8 4.2 34.7 60 1331 22 56 52 22 58 20 NGC4418 16 45 38 14.7 608.9 4.3 35.3 12 1331 22 58 20 23 02 20 --- 16 49 39 14.1 609.7 4.4 35.5 240 1362 22 58 21 23 02 49 J1232 16 50 08 13.5 607.9 4.3 35.0 12 1362 23 02 49 23 03 49 --- 16 51 09 13.4 608.1 4.3 35.1 60 1369 23 02 50 23 04 18 NGC4418 16 51 38 13.8 610.1 4.4 35.6 12 1369 23 04 18 23 08 18 --- 16 55 39 13.2 611.0 4.5 35.8 240 1400 23 04 19 23 09 09 J1256 16 56 29 13.2 602.1 4.0 33.4 19 1400 23 09 09 23 13 09 --- 17 00 30 12.7 603.0 4.1 33.6 240 1431 23 09 10 23 14 04 J1232 17 01 25 11.9 610.2 4.5 35.6 26 1431 23 14 04 23 15 04 --- 17 02 25 11.7 610.4 4.5 35.7 60 1438 23 14 05 Schedule for BADARY (Code Bd ) Page 7 Phase-referencing of NGC4418 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 6 Mar 2014 Day 65 --- 23 15 33 NGC4418 17 02 54 12.2 612.5 4.6 36.2 12 1438 23 15 33 23 19 33 --- 17 06 55 11.6 613.3 4.7 36.4 240 1469 23 15 34 23 20 02 J1232 17 07 24 11.0 611.4 4.6 36.0 12 1469 23 20 02 23 21 02 --- 17 08 24 10.9 611.7 4.6 36.0 60 1477 23 20 03 23 21 31 NGC4418 17 08 54 11.3 613.7 4.7 36.4 12 1477 23 21 31 23 25 31 --- 17 12 54 10.7 614.5 4.8 36.6 240 1508 23 21 32 23 26 01 J1232 17 13 24 10.1 612.7 4.7 36.2 12 1508 23 26 01 23 27 01 --- 17 14 24 10.0 612.9 4.7 D 36.3 0 1515 23 26 02 23 27 30 NGC4418 17 14 53 10.4 614.9 4.8 36.7 12 1515 23 27 30 23 31 30 --- 17 18 54 9.8 615.8 4.9 D 36.9 0 1546 23 27 31 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess114.C1024 Matching groups in /opt/sched/sched_11.0/catalogs/freq.dat: kvzr_c Added by Des Small, 24 February 2012 Setup group: 6 Station: BADARY Total bit rate: 1024 Format: MARK5B Bits per sample: 2 Sample rate: 32.000 Number of channels: 16 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 4500.00 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 = A B A B A B A B A B A B A B A B The following frequency sets based on these setups were used. Frequency Set: 6 Setup file default. LO sum= 4942.49 4942.49 4942.49 4942.49 4974.49 4974.49 4974.49 4974.49 5006.49 5006.49 5006.49 5006.49 5038.49 5038.49 5038.49 5038.49 BBC fr= 442.49 442.49 442.49 442.49 474.49 474.49 474.49 474.49 506.49 506.49 506.49 506.49 538.49 538.49 538.49 538.49 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: 6 7 8 Track assignments are: track1= 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 barrel=roll_off POSITIONS OF SOURCES USED IN RECORDING SCANS Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) * NGC4418 12 24 20.753136 * 12 26 54.612600 12 27 40.017185 0.00 -00 36 03.52524 *-00 52 39.37200 -00 57 32.25383 0.00 From catalog imbedded in main SCHED input file. * J1232 12 29 25.899380 * 12 32 00.015985 12 32 45.502055 0.00 -02 07 31.66618 *-02 24 04.79425 -02 28 56.46174 0.00 From catalog imbedded in main SCHED input file. * J1256 12 53 35.831298 * 12 56 11.166566 12 56 56.987968 0.00 -05 31 07.99587 *-05 47 21.52473 -05 52 05.88561 0.00 From catalog imbedded in main SCHED input file. 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 NGC4418 sess114.C1024 1 2 3 4 5 6 9 10 11 12 13 1 + 6.200 363.199 J1232 sess114.C1024 1 2 3 4 5 6 9 10 11 12 13 1 + 1.567 90.600 J1256 sess114.C1024 1 2 3 4 5 6 9 10 11 12 13 1 + 0.533 35.333 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) NGC4418 159.5 J1232 157.8 J1256 151.0 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