COVER INFORMATION Station: MC_DBBC (Code Md ) Experiment: X band NME+FTP-FT Experiment Exp. Code: N13X4 Schedule Version: 1.00 Processed by SCHED version: 10.20 Release of about July 12, 2012 PI: Gabriele SURCIS Address: JIVE Postbus 2 7990 AA Dwingeloo The Netherlands Phone: +31-521-596508 EMAIL: surcis@jive.nl Fax: Phone during observation: +31-521-596508 Observing mode: 512-8-2 Notes: 8 x 16 MHz, 2 bit sampling Check antenna pointing, Please Two FTP-FT scan scheduled. COVER LETTER: This is the schedule for the 3.6 NME and ftp fringe-test on 04 November 2013 involving 12 antennas: Eb Wb On20 Mc Nt Ys Sv Zc Bd Ur Sh Hh (+Md). The schedule consists of long integrations on strong calibrators like J1751+0939 and J1850+2825 as well as phase-referencing parts with a continuum source as target. Two ftp-fringe tests are scheduled throughout the experiment: ~10:40 (scan 2, 2 sec, J1751+0939) ~13:22 (scan 67, 2 sec, J1850+2825) Please make sure that the autoftp is set up correctly. Thanks! Good luck with the session! Gabriele Schedule for MC_DBBC (Code Md ) Page 2 X band NME+FTP-FT 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 ---------------------------------------------------------------------------------------- --- Mon 4 Nov 2013 Day 308 --- Next scan frequencies: 8391.49 8391.49 8391.49 8391.49 8407.49 8407.49 8407.49 8407.49 8423.49 8423.49 8423.49 8423.49 8439.49 8439.49 8439.49 8439.49 Next BBC frequencies: 311.49 311.49 311.49 311.49 327.49 327.49 327.49 327.49 343.49 343.49 343.49 343.49 359.49 359.49 359.49 359.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 10 30 00 J1751+0939 14 11 55 31.3 468.9 -3.7 -43.2 0 0 10 30 00 10 35 00 =1749+096 14 16 56 32.2 469.9 -3.6 -42.8 300 19 10 30 01 10 36 00 J1751+0939 14 17 56 32.3 470.1 -3.6 -42.8 57 19 10 36 00 10 41 00 =1749+096 14 22 57 33.2 471.2 -3.5 -42.4 300 39 10 36 01 10 42 00 J1751+0939 14 23 57 33.3 471.4 -3.5 -42.3 57 39 10 42 00 10 47 00 =1749+096 14 28 58 34.2 472.5 -3.4 -41.9 300 58 10 42 01 10 49 00 J1925+2106 14 30 58 25.9 445.2 -4.9 -49.6 79 58 10 49 00 10 51 00 =1923+210 14 32 58 26.3 445.5 -4.9 -49.6 120 66 10 49 01 10 51 00 J1925+2106 14 32 58 26.3 445.5 -4.9 -49.6 -3 66 No stop 10 53 00 =1923+210 14 34 59 26.6 445.8 -4.9 -49.7 117 74 10 51 01 10 54 00 J1931+2243 14 35 59 26.9 443.7 -4.9 -50.2 53 74 10 54 00 10 55 30 =1929+226 14 37 29 27.2 444.0 -4.9 -50.3 90 79 10 54 01 10 55 30 J1925+2106 14 37 29 27.1 446.3 -4.8 -49.7 -7 79 No stop 10 57 30 =1923+210 14 39 29 27.4 446.6 -4.8 -49.7 113 87 10 55 31 10 58 30 J1931+2243 14 40 30 27.7 444.5 -4.9 -50.3 53 87 10 58 30 11 00 00 =1929+226 14 42 00 28.0 444.7 -4.8 -50.3 90 93 10 58 31 11 00 00 J1925+2106 14 42 00 27.9 447.0 -4.7 -49.8 -7 93 No stop 11 02 00 =1923+210 14 44 00 28.2 447.4 -4.7 -49.8 113 101 11 00 01 11 03 00 J1931+2243 14 45 00 28.5 445.2 -4.8 -50.4 53 101 11 03 00 11 04 30 =1929+226 14 46 31 28.8 445.5 -4.8 -50.4 90 106 11 03 01 11 04 30 J1925+2106 14 46 31 28.7 447.8 -4.7 -49.8 -7 106 No stop 11 06 30 =1923+210 14 48 31 29.1 448.1 -4.6 -49.8 113 114 11 04 31 11 07 30 J1931+2243 14 49 31 29.3 446.0 -4.7 -50.5 53 114 11 07 30 11 09 00 =1929+226 14 51 01 29.6 446.2 -4.7 -50.5 90 120 11 07 31 11 09 00 J1925+2106 14 51 01 29.5 448.6 -4.6 -49.8 -7 120 No stop 11 11 00 =1923+210 14 53 02 29.9 448.9 -4.6 -49.8 113 128 11 09 01 Schedule for MC_DBBC (Code Md ) Page 3 X band NME+FTP-FT 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 ---------------------------------------------------------------------------------------- --- Mon 4 Nov 2013 Day 308 --- 11 12 00 J1931+2243 14 54 02 30.1 446.7 -4.6 -50.5 53 128 11 12 00 11 13 30 =1929+226 14 55 32 30.4 447.0 -4.6 -50.5 90 134 11 12 01 11 13 30 J1925+2106 14 55 32 30.3 449.4 -4.5 -49.9 -7 134 No stop 11 15 30 =1923+210 14 57 32 30.7 449.7 -4.5 -49.9 113 141 11 13 31 11 16 30 J1931+2243 14 58 33 30.9 447.5 -4.6 -50.6 53 141 11 16 30 11 18 00 =1929+226 15 00 03 31.2 447.8 -4.5 -50.6 90 147 11 16 31 11 18 00 J1925+2106 15 00 03 31.1 450.1 -4.4 -49.9 -7 147 No stop 11 20 00 =1923+210 15 02 03 31.5 450.5 -4.4 -49.9 113 155 11 18 01 11 21 00 J1931+2243 15 03 03 31.7 448.3 -4.5 -50.6 53 155 11 21 00 11 22 30 =1929+226 15 04 34 32.0 448.5 -4.5 -50.6 90 161 11 21 01 11 22 30 J1925+2106 15 04 34 31.9 450.9 -4.4 -49.8 -7 161 No stop 11 24 30 =1923+210 15 06 34 32.3 451.3 -4.3 -49.8 113 168 11 22 31 11 25 30 J1931+2243 15 07 34 32.5 449.0 -4.4 -50.6 53 168 11 25 30 11 27 00 =1929+226 15 09 04 32.8 449.3 -4.4 -50.6 90 174 11 25 31 11 27 00 J1925+2106 15 09 04 32.7 451.7 -4.3 -49.8 -7 174 No stop 11 29 00 =1923+210 15 11 05 33.1 452.1 -4.3 -49.8 113 182 11 27 01 11 30 00 J1931+2243 15 12 05 33.3 449.8 -4.3 -50.6 53 182 11 30 00 11 31 30 =1929+226 15 13 35 33.6 450.1 -4.3 -50.6 90 188 11 30 01 11 31 30 J1925+2106 15 13 35 33.5 452.6 -4.2 -49.8 -7 188 No stop 11 33 30 =1923+210 15 15 35 33.9 452.9 -4.2 -49.8 113 195 11 31 31 11 34 30 J1931+2243 15 16 36 34.1 450.6 -4.3 -50.6 53 195 11 34 30 11 36 00 =1929+226 15 18 06 34.4 450.9 -4.2 -50.6 90 201 11 34 31 11 36 00 J1925+2106 15 18 06 34.3 453.4 -4.1 -49.7 -7 201 No stop 11 38 00 =1923+210 15 20 06 34.7 453.7 -4.1 -49.7 113 209 11 36 01 11 39 00 J1931+2243 15 21 06 34.9 451.4 -4.2 -50.6 53 209 11 39 00 11 40 30 =1929+226 15 22 37 35.2 451.7 -4.2 -50.6 90 215 11 39 01 11 40 30 J1925+2106 15 22 37 35.1 454.2 -4.1 -49.7 -7 215 No stop 11 42 30 =1923+210 15 24 37 35.5 454.6 -4.0 -49.6 113 223 11 40 31 11 43 30 J1931+2243 15 25 37 35.7 452.2 -4.1 -50.6 53 223 11 43 30 11 45 00 =1929+226 15 27 07 36.0 452.5 -4.1 -50.6 90 228 11 43 31 Schedule for MC_DBBC (Code Md ) Page 4 X band NME+FTP-FT 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 ---------------------------------------------------------------------------------------- --- Mon 4 Nov 2013 Day 308 --- 11 45 00 J1925+2106 15 27 07 35.9 455.0 -4.0 -49.6 -7 228 No stop 11 47 00 =1923+210 15 29 08 36.3 455.4 -4.0 -49.6 113 236 11 45 01 11 48 00 J1931+2243 15 30 08 36.5 453.1 -4.0 -50.5 53 236 11 48 00 11 49 30 =1929+226 15 31 38 36.8 453.3 -4.0 -50.5 90 242 11 48 01 11 49 30 J1925+2106 15 31 38 36.7 455.9 -3.9 -49.5 -7 242 No stop 11 51 30 =1923+210 15 33 38 37.1 456.3 -3.9 -49.5 113 250 11 49 31 11 52 30 J1931+2243 15 34 39 37.3 453.9 -4.0 -50.5 53 250 11 52 30 11 54 00 =1929+226 15 36 09 37.6 454.2 -3.9 -50.5 90 255 11 52 31 11 54 00 J1925+2106 15 36 09 37.5 456.7 -3.8 -49.4 -7 255 No stop 11 56 00 =1923+210 15 38 09 37.9 457.1 -3.8 -49.3 113 263 11 54 01 11 57 00 J1931+2243 15 39 09 38.1 454.7 -3.9 -50.4 53 263 11 57 00 11 58 30 =1929+226 15 40 40 38.4 455.0 -3.9 -50.4 90 269 11 57 01 11 58 30 J1925+2106 15 40 40 38.3 457.6 -3.8 -49.3 -7 269 No stop 12 00 30 =1923+210 15 42 40 38.7 458.0 -3.7 -49.2 113 277 11 58 31 12 01 30 J1931+2243 15 43 40 38.9 455.6 -3.8 -50.3 53 277 12 01 30 12 03 00 =1929+226 15 45 10 39.2 455.9 -3.8 -50.3 90 283 12 01 31 12 03 00 J1925+2106 15 45 10 39.1 458.5 -3.7 -49.1 -7 283 No stop 12 05 00 =1923+210 15 47 11 39.5 458.9 -3.7 -49.0 113 290 12 03 01 12 06 00 J1931+2243 15 48 11 39.7 456.4 -3.7 -50.2 53 290 12 06 00 12 07 30 =1929+226 15 49 41 40.0 456.7 -3.7 -50.2 90 296 12 06 01 12 07 30 J1925+2106 15 49 41 39.9 459.4 -3.6 -49.0 -7 296 No stop 12 09 30 =1923+210 15 51 41 40.3 459.8 -3.6 -48.9 113 304 12 07 31 12 10 30 J1931+2243 15 52 41 40.5 457.3 -3.7 -50.1 53 304 12 10 30 12 12 00 =1929+226 15 54 12 40.8 457.6 -3.6 -50.0 90 310 12 10 31 12 12 00 J1925+2106 15 54 12 40.7 460.3 -3.5 -48.8 -8 310 No stop 12 14 00 =1923+210 15 56 12 41.1 460.7 -3.5 -48.7 112 317 12 12 01 12 15 00 J1931+2243 15 57 12 41.3 458.2 -3.6 -49.9 52 317 12 15 00 12 16 30 =1929+226 15 58 42 41.6 458.5 -3.6 -49.9 90 323 12 15 01 12 16 30 J1925+2106 15 58 42 41.5 461.2 -3.5 -48.6 -8 323 No stop 12 18 30 =1923+210 16 00 43 41.8 461.6 -3.4 -48.5 112 331 12 16 31 Schedule for MC_DBBC (Code Md ) Page 5 X band NME+FTP-FT 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 ---------------------------------------------------------------------------------------- --- Mon 4 Nov 2013 Day 308 --- 12 19 30 J1931+2243 16 01 43 42.1 459.1 -3.5 -49.8 52 331 12 19 30 12 21 00 =1929+226 16 03 13 42.4 459.4 -3.5 -49.7 90 337 12 19 31 12 21 00 J1925+2106 16 03 13 42.3 462.2 -3.4 -48.4 -8 337 No stop 12 23 00 =1923+210 16 05 14 42.6 462.6 -3.4 -48.3 112 344 12 21 01 12 24 00 J1931+2243 16 06 14 42.9 460.0 -3.4 -49.6 52 344 12 24 00 12 25 30 =1929+226 16 07 44 43.2 460.3 -3.4 -49.5 90 350 12 24 01 12 25 30 J1925+2106 16 07 44 43.1 463.1 -3.3 -48.1 -8 350 No stop 12 27 30 =1923+210 16 09 44 43.4 463.5 -3.3 -48.0 112 358 12 25 31 12 28 30 J1931+2243 16 10 44 43.7 460.9 -3.4 -49.4 52 358 12 28 30 12 30 00 =1929+226 16 12 15 44.0 461.2 -3.3 -49.3 90 364 12 28 31 12 30 00 J1925+2106 16 12 15 43.9 464.1 -3.2 -47.9 -8 364 No stop 12 32 00 =1923+210 16 14 15 44.2 464.5 -3.2 -47.7 112 372 12 30 01 12 33 00 J1931+2243 16 15 15 44.5 461.9 -3.3 -49.2 52 372 12 33 00 12 34 30 =1929+226 16 16 45 44.8 462.2 -3.3 -49.1 90 377 12 33 01 12 34 30 J1925+2106 16 16 45 44.6 465.1 -3.2 -47.6 -8 377 No stop 12 36 30 =1923+210 16 18 46 45.0 465.5 -3.1 -47.4 112 385 12 34 31 12 37 30 J1931+2243 16 19 46 45.3 462.8 -3.2 -48.9 52 385 12 37 30 12 39 00 =1929+226 16 21 16 45.6 463.2 -3.2 -48.8 90 391 12 37 31 12 39 00 J1925+2106 16 21 16 45.4 466.1 -3.1 -47.3 -8 391 No stop 12 41 00 =1923+210 16 23 16 45.7 466.5 -3.1 -47.1 112 399 12 39 01 12 42 00 J1931+2243 16 24 17 46.1 463.8 -3.1 -48.7 52 399 12 42 00 12 43 30 =1929+226 16 25 47 46.3 464.1 -3.1 -48.6 90 404 12 42 01 12 43 30 J1925+2106 16 25 47 46.2 467.1 -3.0 -46.9 -8 404 No stop 12 45 30 =1923+210 16 27 47 46.5 467.6 -3.0 -46.8 112 412 12 43 31 12 46 30 J1931+2243 16 28 47 46.9 464.8 -3.1 -48.4 52 412 12 46 30 12 48 00 =1929+226 16 30 18 47.1 465.2 -3.0 -48.3 90 418 12 46 31 12 48 00 J1925+2106 16 30 18 46.9 468.2 -2.9 -46.6 -8 418 No stop 12 50 00 =1923+210 16 32 18 47.3 468.6 -2.9 -46.4 112 426 12 48 01 12 51 00 J1931+2243 16 33 18 47.6 465.8 -3.0 -48.1 52 426 12 51 00 12 52 30 =1929+226 16 34 48 47.9 466.2 -3.0 -48.0 90 432 12 51 01 Schedule for MC_DBBC (Code Md ) Page 6 X band NME+FTP-FT 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 ---------------------------------------------------------------------------------------- --- Mon 4 Nov 2013 Day 308 --- 12 52 30 J1925+2106 16 34 48 47.7 469.2 -2.9 -46.2 -8 432 No stop 12 54 30 =1923+210 16 36 49 48.0 469.7 -2.8 -46.0 112 439 12 52 31 12 55 30 J1931+2243 16 37 49 48.4 466.9 -2.9 -47.7 52 439 12 55 30 12 57 00 =1929+226 16 39 19 48.7 467.2 -2.9 -47.6 90 445 12 55 31 12 57 00 J1925+2106 16 39 19 48.5 470.3 -2.8 -45.8 -8 445 No stop 12 59 00 =1923+210 16 41 19 48.8 470.8 -2.8 -45.6 112 453 12 57 01 13 00 00 J1931+2243 16 42 20 49.2 467.9 -2.8 -47.4 52 453 13 00 00 13 01 30 =1929+226 16 43 50 49.4 468.3 -2.8 -47.2 90 459 13 00 01 13 01 30 J1925+2106 16 43 50 49.2 471.4 -2.7 -45.4 -8 459 No stop 13 03 30 =1923+210 16 45 50 49.5 471.9 -2.7 -45.2 112 466 13 01 31 13 04 30 J1931+2243 16 46 50 49.9 469.0 -2.8 -47.0 52 466 13 04 30 13 06 00 =1929+226 16 48 21 50.2 469.4 -2.7 -46.8 90 472 13 04 31 13 07 00 J1925+2106 16 49 21 50.1 472.8 -2.6 -44.8 52 472 13 07 00 13 09 00 =1923+210 16 51 21 50.5 473.4 -2.6 -44.6 120 480 13 07 01 13 11 00 J1850+2825 16 53 21 61.7 474.6 -2.0 -47.5 94 480 13 11 00 13 17 00 =1848+283 16 59 22 62.6 476.5 -1.9 -46.5 360 503 13 11 01 13 18 00 J1850+2825 17 00 23 62.8 476.8 -1.8 -46.3 57 503 13 18 00 13 23 00 =1848+283 17 05 23 63.6 478.5 -1.8 -45.4 300 523 13 18 01 13 24 00 J1850+2825 17 06 24 63.7 478.9 -1.7 -45.2 57 523 13 24 00 13 30 00 =1848+283 17 12 25 64.7 481.0 -1.6 -44.0 360 546 13 24 01 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. ======== Setup file: sess313.X512 --- 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: 13 Station: MC_DBBC Total bit rate: 512 Format: MARK5B Bits per sample: 2 Sample rate: 16.000 Number of channels: 16 DBE type: Speedup factor: 1.00 Disk used to record data. 1st LO= 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 8080.00 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 = 5 1 5 1 6 2 6 2 7 3 7 3 8 4 8 4 BBC SB= L L U U L L U U L L U U L L U U IF = B1 A1 B1 A1 B1 A1 B1 A1 B1 A1 B1 A1 B1 A1 B1 A1 The following frequency sets based on these setups were used. Frequency Set: 13 Setup file default. LO sum= 8391.49 8391.49 8391.49 8391.49 8407.49 8407.49 8407.49 8407.49 8423.49 8423.49 8423.49 8423.49 8439.49 8439.49 8439.49 8439.49 BBC fr= 311.49 311.49 311.49 311.49 327.49 327.49 327.49 327.49 343.49 343.49 343.49 343.49 359.49 359.49 359.49 359.49 Bandwd= 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 Matching frequency sets: 13 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 -- X band NME+FTP-FT 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) * J1751+0939 17 49 10.387929 * 17 51 32.818572 17 52 11.762260 0.10 1749+096 09 39 42.82574 * 09 39 00.72829 09 39 06.27166 0.10 J1751+09 /aps3/sched10.2/catalogs/sources.vlba rfc_2012b Petrov, 2012, unpublished 133560 observations 0.250 scan and 19.500 baseline hours in setup: sess313.X512 Frequency sets (dups not shown): 1 2 3 4 5 6 7 10 11 12 13 * J1850+2825 18 48 29.069767 * 18 50 27.589825 18 51 00.058301 0.16 1848+283 28 21 38.48500 * 28 25 13.15523 28 26 35.21469 0.19 J1850+28 /aps3/sched10.2/catalogs/sources.vlba rfc_2012b Petrov, 2012, unpublished 71 observations 0.283 scan and 22.100 baseline hours in setup: sess313.X512 Frequency sets (dups not shown): 1 2 3 4 5 6 7 10 11 12 13 * J1925+2106 19 23 49.792391 * 19 25 59.605354 19 26 35.488565 0.11 1923+210 21 00 23.30482 * 21 06 26.16190 21 08 28.42838 0.10 J1925+21 /aps3/sched10.2/catalogs/sources.vlba rfc_2012b Petrov, 2012, unpublished 32646 observations 1.067 scan and 70.050 baseline hours in setup: sess313.X512 Frequency sets (dups not shown): 1 2 3 4 5 6 7 10 11 12 13 * J1931+2243 19 29 16.894885 * 19 31 24.916779 19 32 00.333106 0.11 1929+226 22 37 06.35047 * 22 43 31.25849 22 45 40.08861 0.10 J1931+22 /aps3/sched10.2/catalogs/sources.vlba rfc_2012b Petrov, 2012, unpublished 3020 observations 0.750 scan and 58.500 baseline hours in setup: sess313.X512 Frequency sets (dups not shown): 1 2 3 4 5 6 7 10 11 12 13 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) J1751+0939 54.0 J1850+2825 75.1 J1925+2106 79.4 J1931+2243 81.2 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