COVER INFORMATION Station: BADARY (Code Bd ) Experiment: Network Monitoring Experiment Exp. Code: N13K3 Schedule Version: 1.00 Processed by SCHED version: 10.20 Release of about July 12, 2012 PI: Ivan Agudo Address: JIVE Postbus 2 7990 AA Dwingeloo The Netherlands Phone: +31-521-596549 EMAIL: agudo@jive.nl Fax: Phone during observation: +31-521-596549 Observing mode: Notes: 1.3 cm NME for session 3/2013 1 Gbps, 2-bit sampling, 16 MHz filters Send the disk pack by express to JIVE Additional DBBC testing data from Mc and Tr is expected. COVER LETTER: Dear EVN friends, This is the schedule for the 1.3cm NME on Oct. 17 2013, involving 17 stations: Eb Jb2 On20 Mc Nt Tr Ys Mh Sv Zc Bd Ur Sh Hh Ky Ku Kt The NME uses a setup with 1 Gbps and consists of integrations on strong calibrators (OJ287, 4C39.25, 0836+710, with ~5, ~8, and ~2.3 Jy at 15GHz as reported by the MOJAVE Team) as well as phase-referencing cycles involving 4C39.25 and a continuum calibrator (J0916+3854) as targets. There are three ftp fringe-test scans starting at: (1) 03:35:40 UT (scan 2, 2 sec, OJ287) (2) 03:59:40 UT (scan 6, 2 sec, 4C39.25) (3) 05:52:50 UT (scan 65, 2 sec, 4C39.25) See you on Skype group chat and Good luck with the session! Ivan Skype account: ivan-agudo Schedule for BADARY (Code Bd ) Page 2 Network Monitoring Experiment 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 17 Oct 2013 Day 290 --- Next scan frequencies: 22187.49 22187.49 22187.49 22187.49 22219.49 22219.49 22219.49 22219.49 22251.49 22251.49 22251.49 22251.49 22283.49 22283.49 22283.49 22283.49 Next BBC frequencies: 267.49 267.49 267.49 267.49 299.49 299.49 299.49 299.49 331.49 331.49 331.49 331.49 363.49 363.49 363.49 363.49 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 03 30 00 OJ287 12 02 09 42.0 606.7 3.1 37.2 0 0 03 30 00 03 35 00 --- 12 07 10 41.2 607.9 3.2 37.6 300 39 03 30 01 03 35 40 OJ287 12 07 50 41.1 608.1 3.2 37.7 34 39 03 35 40 03 40 40 --- 12 12 51 40.4 609.3 3.3 38.0 300 77 03 35 41 03 42 40 OJ287 12 14 51 40.1 609.8 3.3 38.2 114 77 03 42 40 03 47 40 --- 12 19 52 39.4 611.0 3.4 38.5 300 116 03 42 41 03 48 20 OJ287 12 20 32 39.3 611.2 3.4 38.6 34 116 03 48 20 03 53 20 --- 12 25 33 38.6 612.3 3.5 38.9 300 155 03 48 21 03 54 00 4C39.25 12 26 13 56.8 625.2 3.0 52.5 -11 155 03 54 00 03 59 00 --- 12 31 14 56.0 626.3 3.1 52.6 289 194 03 54 01 03 59 40 4C39.25 12 31 54 55.9 626.4 3.1 52.6 34 194 03 59 40 04 04 40 --- 12 36 55 55.1 627.5 3.2 52.7 300 232 03 59 41 04 06 40 4C39.25 12 38 55 54.8 627.9 3.2 52.7 114 232 04 06 40 04 07 40 --- 12 39 55 54.7 628.1 3.2 52.7 60 240 04 06 41 04 08 20 J0916+3854 12 40 35 52.9 630.1 3.4 52.6 23 240 04 08 20 04 09 20 =0913+391 12 41 35 52.8 630.3 3.4 52.6 60 248 04 08 21 04 10 10 4C39.25 12 42 25 54.3 628.6 3.2 52.7 33 248 04 10 10 04 11 10 --- 12 43 26 54.1 628.8 3.3 52.7 60 255 04 10 11 04 12 00 J0916+3854 12 44 16 52.4 630.8 3.4 52.6 33 255 04 12 00 04 13 00 =0913+391 12 45 16 52.2 631.0 3.5 52.6 60 263 04 12 01 04 13 50 4C39.25 12 46 06 53.7 629.3 3.3 52.7 33 263 04 13 50 04 14 50 --- 12 47 06 53.6 629.5 3.3 52.7 60 271 04 13 51 04 15 40 J0916+3854 12 47 56 51.8 631.5 3.5 52.6 33 271 04 15 40 04 16 40 =0913+391 12 48 57 51.6 631.7 3.5 52.6 60 279 04 15 41 04 17 30 4C39.25 12 49 47 53.2 630.0 3.4 52.7 33 279 04 17 30 04 18 30 --- 12 50 47 53.0 630.2 3.4 52.7 60 286 04 17 31 Schedule for BADARY (Code Bd ) Page 3 Network Monitoring Experiment 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 17 Oct 2013 Day 290 --- 04 19 20 J0916+3854 12 51 37 51.2 632.2 3.6 52.6 33 286 04 19 20 04 20 20 =0913+391 12 52 37 51.1 632.4 3.6 52.5 60 294 04 19 21 04 21 10 4C39.25 12 53 27 52.6 630.8 3.4 52.7 33 294 04 21 10 04 22 10 --- 12 54 27 52.4 631.0 3.4 52.7 60 302 04 21 11 04 23 00 J0916+3854 12 55 18 50.6 632.9 3.6 52.5 33 302 04 23 00 04 24 00 =0913+391 12 56 18 50.5 633.1 3.6 52.5 60 310 04 23 01 04 24 50 4C39.25 12 57 08 52.0 631.5 3.5 52.7 33 310 04 24 50 04 25 50 --- 12 58 08 51.9 631.7 3.5 52.7 60 317 04 24 51 04 26 40 J0916+3854 12 58 58 50.1 633.6 3.7 52.5 33 317 04 26 40 04 27 40 =0913+391 12 59 58 49.9 633.8 3.7 52.5 60 325 04 26 41 04 28 30 4C39.25 13 00 48 51.5 632.2 3.5 52.7 33 325 04 28 30 04 29 30 --- 13 01 49 51.3 632.4 3.6 52.7 60 333 04 28 31 04 30 20 J0916+3854 13 02 39 49.5 634.3 3.7 52.4 33 333 04 30 20 04 31 20 =0913+391 13 03 39 49.4 634.4 3.8 52.4 60 341 04 30 21 04 32 10 4C39.25 13 04 29 50.9 632.9 3.6 52.7 33 341 04 32 10 04 33 10 --- 13 05 29 50.7 633.1 3.6 52.6 60 348 04 32 11 04 34 00 J0916+3854 13 06 19 48.9 634.9 3.8 52.3 33 348 04 34 00 04 35 00 =0913+391 13 07 20 48.8 635.1 3.8 52.3 60 356 04 34 01 04 35 50 4C39.25 13 08 10 50.3 633.5 3.7 52.6 33 356 04 35 50 04 36 50 --- 13 09 10 50.2 633.7 3.7 52.6 60 364 04 35 51 04 37 40 J0916+3854 13 10 00 48.4 635.6 3.9 52.3 33 364 04 37 40 04 38 40 =0913+391 13 11 00 48.2 635.8 3.9 52.2 60 372 04 37 41 04 39 30 4C39.25 13 11 50 49.7 634.2 3.7 52.5 33 372 04 39 30 04 40 30 --- 13 12 50 49.6 634.4 3.7 52.5 60 379 04 39 31 04 41 20 J0916+3854 13 13 41 47.8 636.2 3.9 52.2 33 379 04 41 20 04 42 20 =0913+391 13 14 41 47.7 636.4 3.9 52.1 60 387 04 41 21 04 43 10 4C39.25 13 15 31 49.2 634.9 3.8 52.5 34 387 04 43 10 04 44 10 --- 13 16 31 49.0 635.1 3.8 52.5 60 395 04 43 11 04 45 00 J0916+3854 13 17 21 47.2 636.9 4.0 52.1 33 395 04 45 00 04 46 00 =0913+391 13 18 21 47.1 637.1 4.0 52.0 60 403 04 45 01 Schedule for BADARY (Code Bd ) Page 4 Network Monitoring Experiment 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 17 Oct 2013 Day 290 --- 04 46 50 4C39.25 13 19 11 48.6 635.6 3.9 52.4 34 403 04 46 50 04 47 50 --- 13 20 12 48.5 635.7 3.9 52.4 60 410 04 46 51 04 48 40 J0916+3854 13 21 02 46.7 637.5 4.1 52.0 33 410 04 48 40 04 49 40 =0913+391 13 22 02 46.5 637.7 4.1 51.9 60 418 04 48 41 04 50 30 4C39.25 13 22 52 48.1 636.2 3.9 52.3 34 418 04 50 30 04 51 30 --- 13 23 52 47.9 636.4 3.9 52.3 60 426 04 50 31 04 52 20 J0916+3854 13 24 42 46.1 638.2 4.1 51.9 33 426 04 52 20 04 53 20 =0913+391 13 25 43 46.0 638.4 4.1 51.8 60 434 04 52 21 04 54 10 4C39.25 13 26 33 47.5 636.9 4.0 52.2 34 434 04 54 10 04 55 10 --- 13 27 33 47.3 637.0 4.0 52.2 60 441 04 54 11 04 56 00 J0916+3854 13 28 23 45.6 638.8 4.2 51.7 33 441 04 56 00 04 57 00 =0913+391 13 29 23 45.4 639.0 4.2 51.7 60 449 04 56 01 04 57 50 4C39.25 13 30 13 46.9 637.5 4.0 52.1 34 449 04 57 50 04 58 50 --- 13 31 13 46.8 637.7 4.1 52.1 60 457 04 57 51 04 59 40 J0916+3854 13 32 04 45.0 639.4 4.2 51.6 33 457 04 59 40 05 00 40 =0913+391 13 33 04 44.8 639.6 4.3 51.6 60 464 04 59 41 05 01 30 4C39.25 13 33 54 46.4 638.1 4.1 52.0 34 464 05 01 30 05 02 30 --- 13 34 54 46.2 638.3 4.1 52.0 60 472 05 01 31 05 03 20 J0916+3854 13 35 44 44.4 640.1 4.3 51.5 33 472 05 03 20 05 04 20 =0913+391 13 36 44 44.3 640.2 4.3 51.4 60 480 05 03 21 05 05 10 4C39.25 13 37 34 45.8 638.8 4.2 51.9 34 480 05 05 10 05 06 10 --- 13 38 35 45.6 639.0 4.2 51.8 60 488 05 05 11 05 07 00 J0916+3854 13 39 25 43.9 640.7 4.4 51.3 33 488 05 07 00 05 08 00 =0913+391 13 40 25 43.7 640.9 4.4 51.3 60 495 05 07 01 05 08 50 4C39.25 13 41 15 45.2 639.4 4.2 51.7 34 495 05 08 50 05 09 50 --- 13 42 15 45.1 639.6 4.2 51.7 60 503 05 08 51 05 10 40 J0916+3854 13 43 05 43.3 641.3 4.4 51.2 33 503 05 10 40 05 11 40 =0913+391 13 44 06 43.2 641.5 4.4 51.1 60 511 05 10 41 05 12 30 4C39.25 13 44 56 44.7 640.0 4.3 51.6 34 511 05 12 30 05 13 30 --- 13 45 56 44.5 640.2 4.3 51.6 60 519 05 12 31 Schedule for BADARY (Code Bd ) Page 5 Network Monitoring Experiment 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 17 Oct 2013 Day 290 --- 05 14 20 J0916+3854 13 46 46 42.8 641.9 4.5 51.0 33 519 05 14 20 05 15 20 =0913+391 13 47 46 42.6 642.1 4.5 51.0 60 526 05 14 21 05 16 10 4C39.25 13 48 36 44.1 640.7 4.3 51.5 34 526 05 16 10 05 17 10 --- 13 49 36 44.0 640.8 4.4 51.4 60 534 05 16 11 05 18 00 J0916+3854 13 50 27 42.2 642.5 4.5 50.9 33 534 05 18 00 05 19 00 =0913+391 13 51 27 42.1 642.7 4.6 50.8 60 542 05 18 01 05 19 50 4C39.25 13 52 17 43.6 641.3 4.4 51.3 34 542 05 19 50 05 20 50 --- 13 53 17 43.4 641.4 4.4 51.3 60 550 05 19 51 05 21 40 J0916+3854 13 54 07 41.6 643.1 4.6 50.7 33 550 05 21 40 05 22 40 =0913+391 13 55 07 41.5 643.3 4.6 50.6 60 557 05 21 41 05 23 30 4C39.25 13 55 57 43.0 641.9 4.5 51.2 34 557 05 23 30 05 24 30 --- 13 56 58 42.8 642.1 4.5 51.1 60 565 05 23 31 05 25 20 J0916+3854 13 57 48 41.1 643.8 4.7 50.5 33 565 05 25 20 05 26 20 =0913+391 13 58 48 40.9 643.9 4.7 50.5 60 573 05 25 21 05 27 10 4C39.25 13 59 38 42.4 642.5 4.5 51.0 34 573 05 27 10 05 28 10 --- 14 00 38 42.3 642.7 4.5 51.0 60 581 05 27 11 05 29 00 J0916+3854 14 01 28 40.5 644.4 4.7 50.3 34 581 05 29 00 05 30 00 =0913+391 14 02 29 40.4 644.5 4.7 50.3 60 588 05 29 01 05 30 50 4C39.25 14 03 19 41.9 643.1 4.6 50.8 34 588 05 30 50 05 31 50 --- 14 04 19 41.7 643.3 4.6 50.8 60 596 05 30 51 05 32 40 J0916+3854 14 05 09 40.0 645.0 4.8 50.1 34 596 05 32 40 05 33 40 =0913+391 14 06 09 39.8 645.1 4.8 50.1 60 604 05 32 41 05 34 30 4C39.25 14 06 59 41.3 643.7 4.7 50.6 34 604 05 34 30 05 35 30 --- 14 07 59 41.2 643.9 4.7 50.6 60 612 05 34 31 05 36 20 J0916+3854 14 08 50 39.4 645.6 4.9 49.9 34 612 05 36 20 05 37 20 =0913+391 14 09 50 39.3 645.7 4.9 49.9 60 619 05 36 21 05 38 10 4C39.25 14 10 40 40.8 644.3 4.7 50.5 34 619 05 38 10 05 39 10 --- 14 11 40 40.6 644.5 4.7 50.4 60 627 05 38 11 05 40 00 J0916+3854 14 12 30 38.9 646.2 4.9 49.7 34 627 05 40 00 05 41 00 =0913+391 14 13 30 38.7 646.3 4.9 49.7 60 635 05 40 01 Schedule for BADARY (Code Bd ) Page 6 Network Monitoring Experiment 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 17 Oct 2013 Day 290 --- 05 41 50 4C39.25 14 14 21 40.2 644.9 4.8 50.3 34 635 05 41 50 05 42 50 --- 14 15 21 40.1 645.1 4.8 50.2 60 643 05 41 51 05 43 40 J0916+3854 14 16 11 38.4 646.7 5.0 49.5 34 643 05 43 40 05 44 40 =0913+391 14 17 11 38.2 646.9 5.0 49.5 60 650 05 43 41 05 45 30 4C39.25 14 18 01 39.7 645.5 4.8 50.1 34 650 05 45 30 05 46 30 --- 14 19 01 39.5 645.7 4.9 50.0 60 658 05 45 31 05 47 20 J0916+3854 14 19 51 37.8 647.3 5.0 49.3 34 658 05 47 20 05 48 20 =0913+391 14 20 52 37.7 647.5 5.1 49.3 60 666 05 47 21 05 49 10 4C39.25 14 21 42 39.1 646.1 4.9 49.9 34 666 05 49 10 05 50 10 --- 14 22 42 39.0 646.3 4.9 49.8 60 674 05 49 11 05 51 00 J0916+3854 14 23 32 37.3 647.9 5.1 49.1 34 674 05 51 00 05 52 00 =0913+391 14 24 32 37.1 648.1 5.1 49.1 60 681 05 51 01 05 52 50 4C39.25 14 25 22 38.6 646.7 5.0 49.7 34 681 05 52 50 05 57 50 --- 14 30 23 37.8 647.5 5.0 49.4 300 720 05 52 51 05 59 50 0836+710 14 32 23 48.7 690.2 5.8 69.5 52 720 05 59 50 06 04 50 --- 14 37 24 48.3 690.4 5.9 68.5 300 759 05 59 51 06 05 30 0836+710 14 38 04 48.3 690.5 5.9 68.3 35 759 06 05 30 06 10 30 --- 14 43 05 47.9 690.7 6.0 67.3 300 797 06 05 31 06 11 10 0836+710 14 43 45 47.8 690.7 6.0 67.2 35 797 06 11 10 06 16 10 --- 14 48 46 47.5 691.0 6.1 66.2 300 836 06 11 11 06 16 50 0836+710 14 49 26 47.4 691.0 6.1 66.0 35 836 06 16 50 06 21 50 --- 14 54 27 47.0 691.3 6.2 65.0 300 875 06 16 51 06 22 30 0836+710 14 55 07 47.0 691.3 6.2 64.9 35 875 06 22 30 06 30 00 --- 15 02 38 46.4 691.7 6.3 63.4 450 933 06 22 31 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess313.K1024 Matching groups in /aps3/sched10.2/catalogs/freq.dat: kvzr_k Added by Des Small, 24 February 2012 Setup group: 4 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= 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 21920.00 Net SB= L L U U L L U U L L U U L L 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: 9 Setup file default. LO sum= 22187.49 22187.49 22187.49 22187.49 22219.49 22219.49 22219.49 22219.49 22251.49 22251.49 22251.49 22251.49 22283.49 22283.49 22283.49 22283.49 BBC fr= 267.49 267.49 267.49 267.49 299.49 299.49 299.49 299.49 331.49 331.49 331.49 331.49 363.49 363.49 363.49 363.49 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: 9 11 Track assignments are: track1= 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 barrel=roll_off SOURCES USED IN RECORDING SCANS -- Network Monitoring Experiment Catalog positions marked with *. Precession of date coordinates is based on stop time of first scan. Names used in schedule marked with *. Short names used in VLA and SNAP files marked with +. Observation date used in B1950/J2000 coordinate conversion (PRECDATE): 1979.900 No adjustments are made for rates (DRA, DDEC). Scan hours are for recording scans only. Baseline hours are only counted for scans above horizon at both ends. Source Source position (RA/Dec) Error (B1950) (J2000) (Date) (mas) J0841+7053 08 36 21.556645 * 08 41 24.365283 08 42 46.538282 0.31 * 0836+710 71 04 22.42740 * 70 53 42.17302 70 50 19.75249 0.10 J0841+70 /aps3/sched10.2/catalogs/sources.vlba rfc_2012b Petrov, 2012, unpublished 4322 observations 0.458 scan and 64.816 baseline hours in setup: sess313.K1024 Frequency sets (dups not shown): 1 2 3 4 5 6 7 8 9 10 12 13 15 18 19 J0854+2006 08 51 57.250618 * 08 54 48.874930 08 55 36.298664 0.11 0851+202 20 17 58.41733 * 20 06 30.64078 20 03 12.42132 0.10 J0854+20 /aps3/sched10.2/catalogs/sources.vlba * OJ287 rfc_2012b Petrov, 2012, unpublished 191510 observations 0.333 scan and 57.000 baseline hours in setup: sess313.K1024 Frequency sets (dups not shown): 1 2 3 4 5 6 7 8 9 10 12 13 14 15 18 19 * J0916+3854 09 13 39.517576 * 09 16 48.904600 09 17 40.826977 0.20 0913+391 39 07 02.11851 * 38 54 28.14666 38 50 45.86659 0.23 J0916+38 /aps3/sched10.2/catalogs/sources.vlba rfc_2012b Petrov, 2012, unpublished 84 observations 0.483 scan and 75.450 baseline hours in setup: sess313.K1024 Frequency sets (dups not shown): 1 2 3 4 5 6 7 8 9 10 12 13 14 15 18 19 J0927+3902 09 23 55.319217 * 09 27 03.013938 09 27 54.380190 0.13 0923+392 39 15 23.56637 * 39 02 20.85177 38 58 31.03918 0.10 * 4C39.25 /aps3/sched10.2/catalogs/sources.vlba J0927+39 rfc_2012b Petrov, 2012, unpublished 239566 observations 0.733 scan and 116.677 baseline hours in setup: sess313.K1024 Frequency sets (dups not shown): 1 2 3 4 5 6 7 8 9 10 12 13 14 15 18 19 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) 0836+710 92.9 OJ287 73.3 J0916+3854 75.5 4C39.25 73.8 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