COVER INFORMATION Station: ONSALA60 (Code On ) 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 ONSALA60 (Code On ) 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 13 02 26.6 475.7 -3.7 -29.5 0 0 10 30 00 10 35 00 =1749+096 14 18 03 27.2 477.0 -3.6 -29.2 300 19 10 30 01 10 36 00 J1751+0939 14 19 03 27.3 477.2 -3.6 -29.1 55 19 10 36 00 10 41 00 =1749+096 14 24 04 27.9 478.4 -3.5 -28.7 300 39 10 36 01 10 42 00 J1751+0939 14 25 04 28.0 478.7 -3.5 -28.7 55 39 10 42 00 10 47 00 =1749+096 14 30 05 28.6 479.9 -3.4 -28.3 300 58 10 42 01 10 49 00 J1925+2106 14 32 05 26.5 451.7 -4.9 -35.3 96 58 10 49 00 10 51 00 =1923+210 14 34 05 26.7 452.2 -4.9 -35.3 120 66 10 49 01 10 51 00 J1925+2106 14 34 05 26.7 452.2 -4.9 -35.3 -5 66 No stop 10 53 00 =1923+210 14 36 06 27.0 452.6 -4.8 -35.2 115 74 10 51 01 10 54 00 J1931+2243 14 37 06 27.7 450.6 -4.9 -35.8 50 74 10 54 00 10 55 30 =1929+226 14 38 36 27.9 450.9 -4.9 -35.8 90 79 10 54 01 10 55 30 J1925+2106 14 38 36 27.3 453.1 -4.8 -35.2 -10 79 No stop 10 57 30 =1923+210 14 40 37 27.6 453.6 -4.8 -35.2 110 87 10 55 31 10 58 30 J1931+2243 14 41 37 28.3 451.6 -4.8 -35.7 50 87 10 58 30 11 00 00 =1929+226 14 43 07 28.5 451.9 -4.8 -35.7 90 93 10 58 31 11 00 00 J1925+2106 14 43 07 27.9 454.1 -4.7 -35.2 -10 93 No stop 11 02 00 =1923+210 14 45 07 28.2 454.5 -4.7 -35.2 110 101 11 00 01 11 03 00 J1931+2243 14 46 07 28.9 452.5 -4.8 -35.7 50 101 11 03 00 11 04 30 =1929+226 14 47 38 29.1 452.8 -4.7 -35.7 90 106 11 03 01 11 04 30 J1925+2106 14 47 38 28.5 455.1 -4.6 -35.1 -10 106 No stop 11 06 30 =1923+210 14 49 38 28.8 455.5 -4.6 -35.1 110 114 11 04 31 11 07 30 J1931+2243 14 50 38 29.5 453.5 -4.7 -35.7 50 114 11 07 30 11 09 00 =1929+226 14 52 08 29.7 453.8 -4.7 -35.7 90 120 11 07 31 11 09 00 J1925+2106 14 52 08 29.2 456.1 -4.6 -35.1 -11 120 No stop 11 11 00 =1923+210 14 54 09 29.4 456.5 -4.5 -35.0 109 128 11 09 01 Schedule for ONSALA60 (Code On ) 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 55 09 30.1 454.5 -4.6 -35.6 50 128 11 12 00 11 13 30 =1929+226 14 56 39 30.4 454.8 -4.6 -35.6 90 134 11 12 01 11 13 30 J1925+2106 14 56 39 29.8 457.0 -4.5 -35.0 -11 134 No stop 11 15 30 =1923+210 14 58 40 30.0 457.5 -4.5 -34.9 109 141 11 13 31 11 16 30 J1931+2243 14 59 40 30.8 455.4 -4.5 -35.6 50 141 11 16 30 11 18 00 =1929+226 15 01 10 31.0 455.8 -4.5 -35.5 90 147 11 16 31 11 18 00 J1925+2106 15 01 10 30.4 458.0 -4.4 -34.9 -11 147 No stop 11 20 00 =1923+210 15 03 10 30.6 458.5 -4.4 -34.8 109 155 11 18 01 11 21 00 J1931+2243 15 04 10 31.4 456.4 -4.5 -35.5 50 155 11 21 00 11 22 30 =1929+226 15 05 41 31.6 456.8 -4.4 -35.5 90 161 11 21 01 11 22 30 J1925+2106 15 05 41 31.0 459.0 -4.3 -34.8 -11 161 No stop 11 24 30 =1923+210 15 07 41 31.2 459.5 -4.3 -34.7 109 168 11 22 31 11 25 30 J1931+2243 15 08 41 32.0 457.4 -4.4 -35.4 49 168 11 25 30 11 27 00 =1929+226 15 10 11 32.2 457.8 -4.4 -35.4 90 174 11 25 31 11 27 00 J1925+2106 15 10 11 31.6 460.1 -4.3 -34.7 -11 174 No stop 11 29 00 =1923+210 15 12 12 31.8 460.5 -4.2 -34.6 109 182 11 27 01 11 30 00 J1931+2243 15 13 12 32.6 458.4 -4.3 -35.3 49 182 11 30 00 11 31 30 =1929+226 15 14 42 32.8 458.8 -4.3 -35.3 90 188 11 30 01 11 31 30 J1925+2106 15 14 42 32.2 461.1 -4.2 -34.5 -11 188 No stop 11 33 30 =1923+210 15 16 42 32.4 461.5 -4.2 -34.5 109 195 11 31 31 11 34 30 J1931+2243 15 17 43 33.2 459.4 -4.2 -35.2 49 195 11 34 30 11 36 00 =1929+226 15 19 13 33.4 459.8 -4.2 -35.2 90 201 11 34 31 11 36 00 J1925+2106 15 19 13 32.8 462.1 -4.1 -34.4 -11 201 No stop 11 38 00 =1923+210 15 21 13 33.0 462.6 -4.1 -34.3 109 209 11 36 01 11 39 00 J1931+2243 15 22 13 33.8 460.5 -4.2 -35.1 49 209 11 39 00 11 40 30 =1929+226 15 23 44 34.0 460.8 -4.1 -35.0 90 215 11 39 01 11 40 30 J1925+2106 15 23 44 33.3 463.1 -4.0 -34.2 -11 215 No stop 11 42 30 =1923+210 15 25 44 33.6 463.6 -4.0 -34.2 109 223 11 40 31 11 43 30 J1931+2243 15 26 44 34.4 461.5 -4.1 -34.9 49 223 11 43 30 11 45 00 =1929+226 15 28 14 34.6 461.8 -4.1 -34.9 90 228 11 43 31 Schedule for ONSALA60 (Code On ) 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 28 14 33.9 464.2 -4.0 -34.1 -11 228 No stop 11 47 00 =1923+210 15 30 15 34.2 464.7 -3.9 -34.0 109 236 11 45 01 11 48 00 J1931+2243 15 31 15 35.0 462.5 -4.0 -34.8 49 236 11 48 00 11 49 30 =1929+226 15 32 45 35.2 462.9 -4.0 -34.7 90 242 11 48 01 11 49 30 J1925+2106 15 32 45 34.5 465.2 -3.9 -33.9 -11 242 No stop 11 51 30 =1923+210 15 34 45 34.8 465.7 -3.9 -33.8 109 250 11 49 31 11 52 30 J1931+2243 15 35 46 35.5 463.6 -3.9 -34.6 49 250 11 52 30 11 54 00 =1929+226 15 37 16 35.7 463.9 -3.9 -34.6 90 255 11 52 31 11 54 00 J1925+2106 15 37 16 35.1 466.3 -3.8 -33.7 -11 255 No stop 11 56 00 =1923+210 15 39 16 35.4 466.8 -3.8 -33.6 109 263 11 54 01 11 57 00 J1931+2243 15 40 16 36.1 464.6 -3.9 -34.4 49 263 11 57 00 11 58 30 =1929+226 15 41 47 36.3 465.0 -3.8 -34.4 90 269 11 57 01 11 58 30 J1925+2106 15 41 47 35.7 467.4 -3.7 -33.5 -11 269 No stop 12 00 30 =1923+210 15 43 47 35.9 467.9 -3.7 -33.4 109 277 11 58 31 12 01 30 J1931+2243 15 44 47 36.7 465.7 -3.8 -34.2 49 277 12 01 30 12 03 00 =1929+226 15 46 17 36.9 466.1 -3.8 -34.2 90 283 12 01 31 12 03 00 J1925+2106 15 46 17 36.3 468.5 -3.7 -33.2 -11 283 No stop 12 05 00 =1923+210 15 48 18 36.5 469.0 -3.6 -33.1 109 290 12 03 01 12 06 00 J1931+2243 15 49 18 37.3 466.8 -3.7 -34.0 49 290 12 06 00 12 07 30 =1929+226 15 50 48 37.5 467.1 -3.7 -33.9 90 296 12 06 01 12 07 30 J1925+2106 15 50 48 36.8 469.6 -3.6 -33.0 -11 296 No stop 12 09 30 =1923+210 15 52 48 37.1 470.1 -3.6 -32.9 109 304 12 07 31 12 10 30 J1931+2243 15 53 49 37.9 467.9 -3.6 -33.8 49 304 12 10 30 12 12 00 =1929+226 15 55 19 38.1 468.2 -3.6 -33.7 90 310 12 10 31 12 12 00 J1925+2106 15 55 19 37.4 470.7 -3.5 -32.7 -11 310 No stop 12 14 00 =1923+210 15 57 19 37.7 471.2 -3.5 -32.6 109 317 12 12 01 12 15 00 J1931+2243 15 58 19 38.5 469.0 -3.6 -33.5 49 317 12 15 00 12 16 30 =1929+226 15 59 50 38.7 469.3 -3.5 -33.5 90 323 12 15 01 12 16 30 J1925+2106 15 59 50 38.0 471.8 -3.4 -32.4 -11 323 No stop 12 18 30 =1923+210 16 01 50 38.2 472.3 -3.4 -32.3 109 331 12 16 31 Schedule for ONSALA60 (Code On ) 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 02 50 39.0 470.1 -3.5 -33.3 49 331 12 19 30 12 21 00 =1929+226 16 04 20 39.2 470.5 -3.5 -33.2 90 337 12 19 31 12 21 00 J1925+2106 16 04 20 38.5 472.9 -3.4 -32.1 -11 337 No stop 12 23 00 =1923+210 16 06 21 38.8 473.4 -3.3 -32.0 109 344 12 21 01 12 24 00 J1931+2243 16 07 21 39.6 471.2 -3.4 -33.0 49 344 12 24 00 12 25 30 =1929+226 16 08 51 39.8 471.6 -3.4 -32.9 90 350 12 24 01 12 25 30 J1925+2106 16 08 51 39.1 474.1 -3.3 -31.8 -11 350 No stop 12 27 30 =1923+210 16 10 51 39.3 474.6 -3.3 -31.7 109 358 12 25 31 12 28 30 J1931+2243 16 11 51 40.2 472.3 -3.3 -32.7 49 358 12 28 30 12 30 00 =1929+226 16 13 22 40.4 472.7 -3.3 -32.6 90 364 12 28 31 12 30 00 J1925+2106 16 13 22 39.7 475.2 -3.2 -31.5 -11 364 No stop 12 32 00 =1923+210 16 15 22 39.9 475.8 -3.2 -31.4 109 372 12 30 01 12 33 00 J1931+2243 16 16 22 40.7 473.5 -3.3 -32.4 49 372 12 33 00 12 34 30 =1929+226 16 17 52 40.9 473.9 -3.2 -32.3 90 377 12 33 01 12 34 30 J1925+2106 16 17 52 40.2 476.4 -3.1 -31.2 -11 377 No stop 12 36 30 =1923+210 16 19 53 40.4 476.9 -3.1 -31.0 109 385 12 34 31 12 37 30 J1931+2243 16 20 53 41.3 474.7 -3.2 -32.1 49 385 12 37 30 12 39 00 =1929+226 16 22 23 41.5 475.1 -3.2 -32.0 90 391 12 37 31 12 39 00 J1925+2106 16 22 23 40.7 477.6 -3.1 -30.8 -11 391 No stop 12 41 00 =1923+210 16 24 24 41.0 478.1 -3.0 -30.6 109 399 12 39 01 12 42 00 J1931+2243 16 25 24 41.8 475.8 -3.1 -31.7 49 399 12 42 00 12 43 30 =1929+226 16 26 54 42.0 476.2 -3.1 -31.6 90 404 12 42 01 12 43 30 J1925+2106 16 26 54 41.3 478.8 -3.0 -30.4 -11 404 No stop 12 45 30 =1923+210 16 28 54 41.5 479.3 -3.0 -30.2 109 412 12 43 31 12 46 30 J1931+2243 16 29 54 42.4 477.0 -3.0 -31.4 49 412 12 46 30 12 48 00 =1929+226 16 31 25 42.6 477.4 -3.0 -31.2 90 418 12 46 31 12 48 00 J1925+2106 16 31 25 41.8 480.0 -2.9 -30.0 -11 418 No stop 12 50 00 =1923+210 16 33 25 42.0 480.6 -2.9 -29.8 109 426 12 48 01 12 51 00 J1931+2243 16 34 25 42.9 478.2 -3.0 -31.0 49 426 12 51 00 12 52 30 =1929+226 16 35 55 43.1 478.7 -2.9 -30.8 90 432 12 51 01 Schedule for ONSALA60 (Code On ) 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 35 55 42.3 481.2 -2.8 -29.6 -11 432 No stop 12 54 30 =1923+210 16 37 56 42.6 481.8 -2.8 -29.4 109 439 12 52 31 12 55 30 J1931+2243 16 38 56 43.4 479.5 -2.9 -30.6 49 439 12 55 30 12 57 00 =1929+226 16 40 26 43.6 479.9 -2.9 -30.4 90 445 12 55 31 12 57 00 J1925+2106 16 40 26 42.8 482.5 -2.8 -29.2 -11 445 No stop 12 59 00 =1923+210 16 42 27 43.1 483.0 -2.7 -29.0 109 453 12 57 01 13 00 00 J1931+2243 16 43 27 44.0 480.7 -2.8 -30.2 49 453 13 00 00 13 01 30 =1929+226 16 44 57 44.1 481.1 -2.8 -30.0 90 459 13 00 01 13 01 30 J1925+2106 16 44 57 43.4 483.7 -2.7 -28.7 -11 459 No stop 13 03 30 =1923+210 16 46 57 43.6 484.3 -2.7 -28.5 109 466 13 01 31 13 04 30 J1931+2243 16 47 57 44.5 482.0 -2.7 -29.7 49 466 13 04 30 13 06 00 =1929+226 16 49 28 44.7 482.4 -2.7 -29.6 90 472 13 04 31 13 07 00 J1925+2106 16 50 28 44.0 485.3 -2.6 -28.1 49 472 13 07 00 13 09 00 =1923+210 16 52 28 44.2 485.9 -2.6 -27.9 120 480 13 07 01 13 11 00 J1850+2825 16 54 28 54.6 492.4 -1.9 -26.9 102 480 13 11 00 13 17 00 =1848+283 17 00 29 55.2 494.4 -1.8 -26.0 360 503 13 11 01 13 18 00 J1850+2825 17 01 30 55.3 494.8 -1.8 -25.8 55 503 13 18 00 13 23 00 =1848+283 17 06 30 55.8 496.5 -1.7 -24.9 300 523 13 18 01 13 24 00 J1850+2825 17 07 31 55.8 496.9 -1.7 -24.8 55 523 13 24 00 13 30 00 =1848+283 17 13 32 56.4 499.1 -1.6 -23.7 360 546 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: 10 Station: ONSALA60 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 = 1 5 1 5 2 6 2 6 3 7 3 7 4 8 4 8 BBC SB= L L U U L L U U L L U U L L U U IF = A2 B4 A2 B4 A2 B4 A2 B4 A2 B4 A2 B4 A2 B4 A2 B4 The following frequency sets based on these setups were used. Frequency Set: 2 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: 2 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