COVER INFORMATION Station: EFLSBERG (Code Ef ) Experiment: Radioastron-EVN-Gb-Ev: 0642+449 Exp. Code: gk047a Schedule Version: 1.00 Processed by SCHED version: 10.20 Release of about July 12, 2012 PI: Yuri Kovalev Address: ASC Lebedev Profsoyuznaya 84/32 117997 Moscow, Russia Phone: +7-495-3332167 EMAIL: yyk@asc.rssi.ru Fax: +7-495-3332378 Phone during observation: +7-915-1546281 Observing mode: L-band, dual-pol Notes: L-band, Radioastron-compatible frequency setup PCAL is ON Mk5 disk packs should be sent for correlation to Bonn Schedule for EFLSBERG (Code Ef ) Page 2 Radioastron-EVN-Gb-Ev: 0642+449 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 ---------------------------------------------------------------------------------------- --- Sat 9 Mar 2013 Day 68 --- Next scan frequencies: 1668.00 1668.00 1668.00 1668.00 Next BBC frequencies: 178.00 178.00 178.00 178.00 Next scan bandwidths: 16.00 16.00 16.00 16.00 10 00 00 0642+449 21 36 34 12.2 389.2 -9.2 H -25.9 0 0 10 00 00 10 09 30 --- 21 46 05 12.9 390.7 -9.0 H -27.3 0 18 10 00 01 10 10 00 0642+449 21 46 35 13.0 390.8 -9.0 H -27.3 20 18 10 10 00 10 19 30 --- 21 56 07 13.8 392.4 -8.9 H -28.7 0 37 10 10 01 10 20 00 0642+449 21 56 37 13.8 392.4 -8.8 H -28.7 20 37 10 20 00 10 29 30 --- 22 06 08 14.6 394.0 -8.7 H -30.0 0 55 10 20 01 10 30 00 0642+449 22 06 38 14.7 394.0 -8.7 H -30.1 20 55 10 30 00 10 39 30 --- 22 16 10 15.5 395.5 -8.5 H -31.4 0 74 10 30 01 10 40 00 0642+449 22 16 40 15.6 395.6 -8.5 H -31.5 20 74 10 40 00 10 49 20 --- 22 26 02 16.5 397.1 -8.4 -32.7 0 92 10 40 01 10 49 50 0642+449 22 26 32 16.5 397.2 -8.3 -32.8 20 92 10 49 50 10 59 10 --- 22 35 53 17.4 398.6 -8.2 -34.0 560 110 10 49 51 10 59 40 0642+449 22 36 23 17.5 398.7 -8.2 -34.1 20 110 10 59 40 11 09 00 --- 22 45 45 18.4 400.1 -8.0 -35.3 560 128 10 59 41 11 09 30 0642+449 22 46 15 18.5 400.2 -8.0 -35.4 20 128 11 09 30 11 18 50 --- 22 55 37 19.4 401.6 -7.9 -36.5 560 146 11 09 31 11 19 20 0642+449 22 56 07 19.5 401.7 -7.9 -36.6 20 146 11 19 20 11 28 40 --- 23 05 28 20.5 403.1 -7.7 -37.8 560 164 11 19 21 11 29 10 0642+449 23 05 58 20.5 403.2 -7.7 -37.8 20 164 11 29 10 11 38 30 --- 23 15 20 21.6 404.6 -7.5 -39.0 560 182 11 29 11 11 39 00 0642+449 23 15 50 21.6 404.6 -7.5 -39.0 20 182 11 39 00 11 48 20 --- 23 25 11 22.7 406.0 -7.4 -40.2 560 200 11 39 01 11 49 00 0642+449 23 25 51 22.8 406.1 -7.4 -40.3 30 200 11 49 00 11 58 30 --- 23 35 23 23.9 407.5 -7.2 -41.4 570 218 11 49 01 11 59 00 0642+449 23 35 53 23.9 407.6 -7.2 -41.4 20 218 11 59 00 12 08 30 --- 23 45 25 25.1 409.0 -7.0 -42.5 570 237 11 59 01 12 09 00 0642+449 23 45 55 25.1 409.0 -7.0 -42.6 20 237 12 09 00 12 18 30 --- 23 55 26 26.3 410.4 -6.9 -43.7 570 255 12 09 01 Schedule for EFLSBERG (Code Ef ) Page 3 Radioastron-EVN-Gb-Ev: 0642+449 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 ---------------------------------------------------------------------------------------- --- Sat 9 Mar 2013 Day 68 --- 12 19 00 0642+449 23 55 56 26.3 410.5 -6.9 -43.7 20 255 12 19 00 12 28 30 --- 00 05 28 27.5 411.8 -6.7 -44.8 570 274 12 19 01 12 29 00 0642+449 00 05 58 27.6 411.9 -6.7 -44.9 20 274 12 29 00 12 38 00 --- 00 15 00 28.7 413.2 -6.5 -45.9 540 291 12 29 01 12 38 30 0642+449 00 15 30 28.8 413.2 -6.5 -45.9 20 291 12 38 30 12 47 30 --- 00 24 31 29.9 414.5 -6.4 -46.9 540 308 12 38 31 12 48 00 0642+449 00 25 01 30.0 414.6 -6.4 -46.9 20 308 12 48 00 12 57 00 --- 00 34 03 31.2 415.8 -6.2 -47.9 540 326 12 48 01 12 57 30 0642+449 00 34 33 31.2 415.9 -6.2 -47.9 20 326 12 57 30 13 06 30 --- 00 43 34 32.4 417.2 -6.1 -48.9 540 343 12 57 31 13 07 00 0642+449 00 44 04 32.5 417.2 -6.1 -48.9 20 343 13 07 00 13 16 00 --- 00 53 06 33.7 418.5 -5.9 -49.8 540 361 13 07 01 13 16 30 0642+449 00 53 36 33.8 418.5 -5.9 -49.9 20 361 13 16 30 13 25 30 --- 01 02 37 35.0 419.8 -5.7 -50.8 540 378 13 16 31 13 26 00 0642+449 01 03 07 35.1 419.8 -5.7 -50.8 20 378 13 26 00 13 35 00 --- 01 12 09 36.3 421.1 -5.6 -51.7 540 395 13 26 01 13 36 00 0642+449 01 13 09 36.5 421.2 -5.6 -51.8 49 395 13 36 00 13 45 30 --- 01 22 41 37.8 422.5 -5.4 -52.7 570 414 13 36 01 13 46 00 0642+449 01 23 11 37.9 422.6 -5.4 -52.7 20 414 13 46 00 13 55 30 --- 01 32 42 39.2 423.9 -5.2 -53.6 570 432 13 46 01 13 56 00 0642+449 01 33 12 39.3 423.9 -5.2 -53.7 20 432 13 56 00 14 05 30 --- 01 42 44 40.7 425.2 -5.1 -54.5 570 451 13 56 01 14 06 00 0642+449 01 43 14 40.8 425.3 -5.1 -54.5 20 451 14 06 00 14 15 30 --- 01 52 46 42.1 426.6 -4.9 -55.4 570 469 14 06 01 14 16 00 0642+449 01 53 16 42.2 426.7 -4.9 -55.4 20 469 14 16 00 14 25 00 --- 02 02 17 43.5 427.9 -4.8 -56.2 540 486 14 16 01 14 25 30 0642+449 02 02 47 43.6 428.0 -4.7 -56.2 20 486 14 25 30 14 34 30 --- 02 11 49 44.9 429.2 -4.6 -56.9 540 504 14 25 31 14 35 00 0642+449 02 12 19 45.0 429.3 -4.6 -57.0 20 504 14 35 00 14 44 00 --- 02 21 20 46.4 430.5 -4.4 -57.7 540 521 14 35 01 Schedule for EFLSBERG (Code Ef ) Page 4 Radioastron-EVN-Gb-Ev: 0642+449 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 ---------------------------------------------------------------------------------------- --- Sat 9 Mar 2013 Day 68 --- 14 44 30 0642+449 02 21 50 46.4 430.6 -4.4 -57.7 20 521 14 44 30 14 53 30 --- 02 30 52 47.8 431.8 -4.3 -58.4 540 539 14 44 31 14 54 00 0642+449 02 31 22 47.9 431.9 -4.3 -58.4 20 539 14 54 00 15 03 00 --- 02 40 23 49.2 433.1 -4.1 -59.1 540 556 14 54 01 15 08 26 0851+202 02 45 50 13.8 435.1 -6.2 -40.9 161 556 15 08 26 15 17 46 --- 02 55 31 15.3 436.9 -6.0 -41.2 560 574 15 08 27 15 23 00 0642+449 03 00 27 52.3 436.0 -3.8 -60.4 147 574 15 23 00 15 32 30 --- 03 09 58 53.8 437.3 -3.6 -61.0 570 593 15 23 01 15 33 00 0642+449 03 10 28 53.9 437.4 -3.6 -61.0 20 593 15 33 00 15 42 30 --- 03 20 00 55.3 438.8 -3.5 -61.6 570 611 15 33 01 15 43 00 0642+449 03 20 30 55.4 438.9 -3.5 -61.6 20 611 15 43 00 15 52 30 --- 03 30 01 56.9 440.3 -3.3 -62.1 570 629 15 43 01 15 53 00 0642+449 03 30 32 57.0 440.4 -3.3 -62.1 20 629 15 53 00 16 02 30 --- 03 40 03 58.5 441.9 -3.1 -62.6 570 648 15 53 01 16 07 28 0851+202 03 45 02 23.1 446.1 -5.2 -42.5 134 648 16 07 28 16 16 38 --- 03 54 34 24.6 447.9 -5.0 -42.6 550 665 16 07 29 16 21 47 0642+449 03 59 23 61.5 445.0 -2.8 -63.3 141 665 16 21 47 16 30 57 --- 04 08 55 63.0 446.6 -2.6 -63.5 550 683 16 21 48 16 31 39 0642+449 04 09 17 63.1 446.7 -2.6 -63.5 30 683 16 31 39 16 40 49 --- 04 18 48 64.6 448.4 -2.5 -63.7 550 701 16 31 40 16 41 31 0642+449 04 19 10 64.7 448.4 -2.5 -63.7 30 701 16 41 31 16 50 41 --- 04 28 42 66.2 450.2 -2.3 -63.7 550 719 16 41 32 16 55 40 0851+202 04 33 21 30.8 455.5 -4.4 -42.4 134 719 16 55 40 17 04 50 --- 04 42 53 32.3 457.4 -4.2 -42.2 550 736 16 55 41 17 10 00 0642+449 04 47 44 69.2 454.2 -2.0 -63.4 143 736 17 10 00 17 19 30 --- 04 57 16 70.7 456.4 -1.8 -63.0 570 755 17 10 01 17 20 00 0642+449 04 57 46 70.8 456.5 -1.8 -63.0 19 755 17 20 00 17 29 30 --- 05 07 17 72.3 459.0 -1.7 -62.3 570 773 17 20 01 17 30 00 0642+449 05 07 47 72.4 459.1 -1.7 -62.3 19 773 17 30 00 17 39 30 --- 05 17 19 73.9 461.9 -1.5 -61.3 570 792 17 30 01 Schedule for EFLSBERG (Code Ef ) Page 5 Radioastron-EVN-Gb-Ev: 0642+449 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 ---------------------------------------------------------------------------------------- --- Sat 9 Mar 2013 Day 68 --- 17 40 00 0642+449 05 17 49 73.9 462.0 -1.5 -61.3 19 792 17 40 00 17 49 30 --- 05 27 21 75.4 465.2 -1.3 -59.9 570 810 17 40 01 17 50 10 0642+449 05 28 01 75.5 465.4 -1.3 -59.8 28 810 17 50 10 17 58 40 --- 05 36 52 76.9 468.8 -1.2 -58.1 510 826 17 50 11 17 59 22 0642+449 05 37 14 76.9 469.0 -1.2 -58.0 29 826 17 59 22 18 07 52 --- 05 46 06 78.2 472.9 -1.0 -55.7 510 843 17 59 23 18 12 51 0851+202 05 50 45 42.7 472.7 -3.1 -38.6 134 843 18 12 51 18 22 21 --- 06 00 37 44.1 475.2 -2.9 -37.8 570 861 18 12 52 18 26 57 1328+307 06 04 53 10.8 414.6 -7.4 H -37.0 100 861 18 26 57 18 36 27 --- 06 14 45 12.1 416.4 -7.3 H -37.9 0 880 18 26 58 18 48 06 0642+449 06 26 06 83.3 145.6 -0.4 -30.4 18 880 18 48 06 18 56 26 --- 06 34 48 83.9 158.2 -0.2 -19.5 500 896 18 48 07 18 57 00 0642+449 06 35 02 83.9 158.5 -0.2 -19.2 17 896 18 57 00 19 06 30 --- 06 44 33 84.3 174.7 -0.0 -4.8 570 914 18 57 01 19 07 00 0642+449 06 45 03 84.3 175.6 -0.0 -4.0 12 914 19 07 00 19 16 30 --- 06 54 35 84.2 192.5 0.1 11.2 570 933 19 07 01 19 17 00 0642+449 06 55 05 84.2 193.3 0.1 11.9 12 933 19 17 00 19 26 30 --- 07 04 37 83.6 208.4 0.3 25.3 570 951 19 17 01 19 27 00 0642+449 07 05 07 83.6 209.1 0.3 25.9 13 951 19 27 00 19 36 30 --- 07 14 38 82.7 221.3 0.5 36.3 570 969 19 27 01 19 45 00 1328+307 07 23 10 21.7 68.1 -6.1 -43.2 112 969 19 45 00 19 51 20 --- 07 29 51 22.7 69.2 -6.0 -43.6 380 982 19 45 01 20 00 45 0642+449 07 38 58 79.7 241.6 0.9 52.1 125 982 20 00 45 20 07 45 --- 07 46 19 78.6 245.7 1.0 54.8 420 995 20 00 46 20 13 57 0851+202 07 52 11 57.1 151.8 -1.1 -18.6 114 995 20 13 57 20 20 47 --- 07 59 22 57.6 154.8 -0.9 -16.7 410 1008 20 13 58 20 26 14 1328+307 08 04 30 28.0 75.1 -5.5 -45.4 105 1008 20 26 14 20 32 34 --- 08 11 11 29.0 76.2 -5.3 -45.7 380 1021 20 26 15 20 44 00 0642+449 08 22 19 73.1 259.5 1.6 61.8 219 1021 20 44 00 20 53 30 --- 08 31 51 71.7 262.1 1.7 62.6 570 1039 20 44 01 Schedule for EFLSBERG (Code Ef ) Page 6 Radioastron-EVN-Gb-Ev: 0642+449 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 ---------------------------------------------------------------------------------------- --- Sat 9 Mar 2013 Day 68 --- 20 54 00 0642+449 08 32 21 71.6 262.2 1.7 62.7 19 1039 20 54 00 21 03 30 --- 08 41 53 70.1 264.6 1.9 63.2 570 1057 20 54 01 21 04 00 0642+449 08 42 23 70.0 264.7 1.9 63.2 19 1057 21 04 00 21 13 30 --- 08 51 54 68.5 266.8 2.1 63.5 570 1076 21 04 01 21 14 00 0642+449 08 52 24 68.4 266.9 2.1 63.5 19 1076 21 14 00 21 23 30 --- 09 01 56 66.9 268.9 2.2 63.7 570 1094 21 14 01 21 24 00 0642+449 09 02 26 66.8 269.0 2.2 63.7 19 1094 21 24 00 21 34 00 --- 09 12 28 65.2 270.9 2.4 63.7 600 1113 21 24 01 21 40 56 0851+202 09 19 24 59.2 191.0 0.4 7.4 190 1113 21 40 56 21 50 56 --- 09 29 46 58.8 195.6 0.6 10.5 600 1133 21 40 57 21 57 40 1328+307 09 36 11 42.4 91.7 -3.9 -47.5 124 1133 21 57 40 22 07 50 --- 09 46 43 44.1 93.8 -3.8 -47.4 610 1153 21 57 41 22 20 19 0642+449 09 58 54 57.9 278.8 3.2 62.4 277 1153 22 20 19 22 30 19 --- 10 09 15 56.2 280.3 3.4 61.9 600 1172 22 20 20 22 31 00 0642+449 10 09 37 56.2 280.4 3.4 61.9 29 1172 22 31 00 22 40 30 --- 10 19 08 54.7 281.8 3.5 61.4 570 1190 22 31 01 22 41 00 0642+449 10 19 39 54.6 281.9 3.5 61.3 20 1190 22 41 00 22 50 30 --- 10 29 10 53.1 283.3 3.7 60.8 570 1209 22 41 01 22 51 00 0642+449 10 29 40 53.1 283.3 3.7 60.7 20 1209 22 51 00 23 00 30 --- 10 39 12 51.6 284.7 3.9 60.1 570 1227 22 51 01 23 01 00 0642+449 10 39 42 51.5 284.8 3.9 60.1 20 1227 23 01 00 23 10 30 --- 10 49 13 50.1 286.1 4.0 59.5 570 1245 23 01 01 23 11 00 0642+449 10 49 43 50.0 286.2 4.0 59.4 20 1245 23 11 00 23 21 10 --- 10 59 55 48.4 287.6 4.2 58.7 610 1265 23 11 01 23 28 50 0851+202 11 07 36 50.0 232.7 2.2 32.6 294 1265 23 28 50 23 39 00 --- 11 18 08 48.6 235.8 2.4 34.1 610 1285 23 28 51 23 46 57 1328+307 11 25 47 59.1 118.6 -2.1 -40.4 164 1285 23 46 57 23 57 07 --- 11 36 18 60.6 122.1 -1.9 -38.7 610 1304 23 46 58 Schedule for EFLSBERG (Code Ef ) Page 7 Radioastron-EVN-Gb-Ev: 0642+449 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 ---------------------------------------------------------------------------------------- --- Sun 10 Mar 2013 Day 69 --- 00 09 11 0642+449 11 48 04 41.3 294.2 5.0 54.9 282 1304 00 09 11 00 19 21 --- 11 58 35 39.8 295.6 5.2 53.9 610 1324 00 09 12 00 20 00 0642+449 11 58 55 39.7 295.7 5.2 53.9 28 1324 00 20 00 00 29 30 --- 12 08 26 38.4 297.0 5.3 53.1 570 1342 00 20 01 00 30 00 0642+449 12 08 56 38.3 297.0 5.4 53.0 20 1342 00 30 00 00 39 30 --- 12 18 28 37.0 298.3 5.5 52.1 570 1361 00 30 01 00 40 00 0642+449 12 18 58 36.9 298.4 5.5 52.1 20 1361 00 40 00 00 49 30 --- 12 28 30 35.6 299.7 5.7 51.2 570 1379 00 40 01 00 50 00 0642+449 12 29 00 35.5 299.8 5.7 51.1 20 1379 00 50 00 00 59 30 --- 12 38 31 34.2 301.1 5.8 50.2 570 1398 00 50 01 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess113.L256 --- 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: 12 Station: EFLSBERG 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= 1490.00 1490.00 1490.00 1490.00 Net SB= L L U U Pol. = RCP LCP RCP LCP BBC = 1 5 1 5 BBC SB= L L U U IF = B D B D 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= 178.00 178.00 178.00 178.00 Bandwd= 16.00 16.00 16.00 16.00 Matching frequency sets: 1 7 Track assignments are: track1= 2, 4, 6, 8 barrel=roll_off SOURCES USED IN RECORDING SCANS -- Radioastron-EVN-Gb-Ev: 0642+449 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) J0646+4451 06 42 53.021452 * 06 46 32.025999 06 47 31.646758 0.14 * 0642+449 44 54 30.82734 * 44 51 16.59009 44 50 22.84237 0.10 J0646+44 /usr/local/sched/catalogs/sources.vlba rfc_2012b Petrov, 2012, unpublished 125872 observations 10.258 scan and 388.050 baseline hours in setup: sess113.L256 Frequency sets (dups not shown): 1 2 3 4 5 6 8 9 11 12 J0854+2006 08 51 57.250618 * 08 54 48.874930 08 55 36.082187 0.11 * 0851+202 20 17 58.41733 * 20 06 30.64078 20 03 15.97687 0.10 J0854+20 /usr/local/sched/catalogs/sources.vlba OJ287 rfc_2012b Petrov, 2012, unpublished 191510 observations 1.069 scan and 48.286 baseline hours in setup: sess113.L256 Frequency sets (dups not shown): 1 2 3 4 5 6 8 9 11 12 J1331+3030 13 28 49.657778 * 13 31 08.288070 13 31 46.592508 0.20 3C286 30 45 58.64061 * 30 30 32.95925 30 26 13.73130 0.19 * 1328+307 /usr/local/sched/catalogs/sources.vlba J1331+30 rfc_2012b Petrov, 2012, unpublished 542 observations 0.708 scan and 29.036 baseline hours in setup: sess113.L256 Frequency sets (dups not shown): 1 2 3 4 5 6 8 9 12 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) 0642+449 108.3 0851+202 141.3 1328+307 139.5 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