COVER INFORMATION Station: SHANGHAI (Code Sh ) Experiment: PSR B1257+12 planetary system studies with EVN Exp. Code: EY013A Schedule Version: 1.00 Processed by SCHED version: 9.40 Release Jan. 13, 2011. PI: Zhen Yan Address: Shanghai Astronomical Observatory NO.80 Nandan Road Shanghai China Phone: 86-13402136110 EMAIL: yanzhen@shao.ac.cn,zshen@shao.ac.cn Fax: 86-21-64281104 Phone during observation: 86-13402136110 Observing mode: Phase-referencing of a source at 18cm (1024 Mb/s) Notes: Target source: PSR B1257+12, s=2mJy(1.4GHz) Phase calibrator: J1300+141A Fringe finde J0927+3902, J1310+3220, J1522+3144 Use SCHED version 9.4 Schedule for SHANGHAI (Code Sh ) Page 2 PSR B1257+12 planetary system studies with EVN 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 27 Feb 2011 Day 58 --- Next scan frequencies: 1610.49 1610.49 1610.49 1610.49 1642.49 1642.49 1642.49 1642.49 1674.49 1674.49 1674.49 1674.49 1706.49 1706.49 1706.49 1706.49 Next BBC frequencies: 689.51 689.51 689.51 689.51 657.51 657.51 657.51 657.51 625.51 625.51 625.51 625.51 593.51 593.51 593.51 593.51 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 21 00 00 J0927+3902 15 34 10 17.8 -54.7 6.1 64.1 0 0 21 00 00 21 08 00 =0923+392 15 42 12 16.5 -54.0 6.2 63.0 480 62 21 00 01 21 13 30 J1300+141A 15 47 43 48.3 255.8 2.8 58.9 16 62 21 13 30 21 15 30 =1257+145 15 49 43 47.9 256.1 2.8 59.1 120 77 21 13 31 21 15 30 1257+12 15 49 43 47.0 254.2 2.8 57.6 -6 77 No stop 21 25 30 --- 15 59 44 44.9 256.0 3.0 58.4 594 155 21 15 31 21 26 10 J1300+141A 16 00 25 45.7 258.1 3.0 59.8 34 155 21 26 10 21 27 50 =1257+145 16 02 05 45.3 258.4 3.0 59.9 100 168 21 26 11 21 27 50 1257+12 16 02 05 44.4 256.5 3.0 58.6 -6 168 No stop 21 31 10 --- 16 05 25 43.7 257.1 3.1 58.8 194 194 21 27 51 21 31 50 J1300+141A 16 06 06 44.5 259.0 3.1 60.1 34 194 21 31 50 21 33 20 =1257+145 16 07 36 44.1 259.3 3.1 60.2 90 205 21 31 51 21 33 20 1257+12 16 07 36 43.3 257.4 3.1 58.9 -6 205 No stop 21 36 40 --- 16 10 56 42.6 258.0 3.2 59.1 194 231 21 33 21 21 36 40 J1300+141A 16 10 56 43.4 259.9 3.2 60.4 -6 231 No stop 21 38 10 =1257+145 16 12 27 43.1 260.1 3.2 60.5 84 243 21 36 41 21 38 10 1257+12 16 12 27 42.3 258.3 3.2 59.2 -6 243 No stop 21 41 30 --- 16 15 47 41.6 258.8 3.3 59.4 194 268 21 38 11 21 42 10 J1300+141A 16 16 27 42.3 260.8 3.3 60.7 34 268 21 42 10 21 43 40 =1257+145 16 17 57 42.0 261.0 3.3 60.7 90 280 21 42 11 21 43 40 1257+12 16 17 57 41.1 259.2 3.3 59.5 -6 280 No stop 21 47 00 --- 16 21 18 40.4 259.7 3.3 59.7 194 306 21 43 41 Schedule for SHANGHAI (Code Sh ) Page 3 PSR B1257+12 planetary system studies with EVN 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 27 Feb 2011 Day 58 --- 21 47 00 J1300+141A 16 21 18 41.3 261.5 3.3 60.9 -6 306 No stop 21 48 30 =1257+145 16 22 48 40.9 261.8 3.4 61.0 84 317 21 47 01 21 48 30 1257+12 16 22 48 40.1 260.0 3.4 59.8 -6 317 No stop 21 51 50 --- 16 26 09 39.4 260.5 3.4 59.9 194 343 21 48 31 21 52 30 J1300+141A 16 26 49 40.1 262.4 3.4 61.1 34 343 21 52 30 21 54 00 =1257+145 16 28 19 39.8 262.6 3.5 61.2 90 355 21 52 31 21 54 00 1257+12 16 28 19 38.9 260.8 3.5 60.0 -6 355 No stop 21 57 20 --- 16 31 40 38.2 261.4 3.5 60.2 194 381 21 54 01 21 57 20 J1300+141A 16 31 40 39.1 263.1 3.5 61.3 -6 381 No stop 21 58 50 =1257+145 16 33 10 38.7 263.3 3.5 61.3 84 392 21 57 21 21 58 50 1257+12 16 33 10 37.9 261.6 3.5 60.2 -6 392 No stop 22 02 10 --- 16 36 31 37.2 262.1 3.6 60.4 194 418 21 58 51 22 02 50 J1300+141A 16 37 11 37.9 263.9 3.6 61.4 34 418 22 02 50 22 04 20 =1257+145 16 38 41 37.6 264.1 3.6 61.5 90 430 22 02 51 22 04 20 1257+12 16 38 41 36.7 262.4 3.6 60.4 -6 430 No stop 22 07 40 --- 16 42 01 36.0 262.9 3.7 60.6 194 455 22 04 21 22 07 40 J1300+141A 16 42 01 36.9 264.6 3.7 61.6 -6 455 No stop 22 09 10 =1257+145 16 43 32 36.5 264.8 3.7 61.6 84 467 22 07 41 22 09 10 1257+12 16 43 32 35.7 263.2 3.7 60.6 -6 467 No stop 22 12 30 --- 16 46 52 35.0 263.6 3.8 60.7 194 493 22 09 11 22 13 10 J1300+141A 16 47 32 35.7 265.4 3.8 61.7 34 493 22 13 10 22 14 40 =1257+145 16 49 03 35.4 265.6 3.8 61.7 90 504 22 13 11 22 14 40 1257+12 16 49 03 34.5 264.0 3.8 60.8 -6 504 No stop 22 18 00 --- 16 52 23 33.8 264.4 3.9 60.8 194 530 22 14 41 22 18 00 J1300+141A 16 52 23 34.6 266.1 3.9 61.8 -6 530 No stop 22 19 30 =1257+145 16 53 53 34.3 266.3 3.9 61.8 84 542 22 18 01 22 19 30 1257+12 16 53 53 33.5 264.7 3.9 60.9 -6 542 No stop 22 22 50 --- 16 57 14 32.8 265.1 3.9 61.0 194 568 22 19 31 22 23 30 J1300+141A 16 57 54 33.5 266.9 3.9 61.9 34 568 22 23 30 22 25 00 =1257+145 16 59 24 33.1 267.1 4.0 61.9 90 579 22 23 31 Schedule for SHANGHAI (Code Sh ) Page 4 PSR B1257+12 planetary system studies with EVN 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 27 Feb 2011 Day 58 --- 22 25 00 1257+12 16 59 24 32.3 265.4 4.0 61.0 -6 579 No stop 22 28 20 --- 17 02 45 31.6 265.9 4.0 61.1 194 605 22 25 01 22 28 20 J1300+141A 17 02 45 32.4 267.5 4.0 61.9 -6 605 No stop 22 29 50 =1257+145 17 04 15 32.1 267.7 4.1 62.0 84 617 22 28 21 22 29 50 1257+12 17 04 15 31.3 266.1 4.1 61.1 -6 617 No stop 22 33 10 --- 17 07 36 30.6 266.6 4.1 61.2 194 643 22 29 51 22 33 50 J1300+141A 17 08 16 31.2 268.3 4.1 62.0 34 643 22 33 50 22 35 20 =1257+145 17 09 46 30.9 268.5 4.1 62.0 90 654 22 33 51 22 35 20 1257+12 17 09 46 30.1 266.9 4.2 61.2 -6 654 No stop 22 38 40 --- 17 13 07 29.4 267.3 4.2 61.2 194 680 22 35 21 22 38 40 J1300+141A 17 13 07 30.2 268.9 4.2 62.0 -6 680 No stop 22 40 10 =1257+145 17 14 37 29.9 269.1 4.2 62.0 84 692 22 38 41 22 40 10 1257+12 17 14 37 29.1 267.5 4.2 61.2 -6 692 No stop 22 43 30 --- 17 17 57 28.3 268.0 4.3 61.3 194 717 22 40 11 22 44 10 J1300+141A 17 18 37 29.0 269.6 4.3 62.0 34 717 22 44 10 22 45 40 =1257+145 17 20 08 28.7 269.8 4.3 62.0 90 729 22 44 11 22 45 40 1257+12 17 20 08 27.9 268.2 4.3 61.3 -6 729 No stop 22 49 00 --- 17 23 28 27.2 268.7 4.4 61.3 194 755 22 45 41 22 49 00 J1300+141A 17 23 28 28.0 270.2 4.4 62.0 -6 755 No stop 22 50 30 =1257+145 17 24 58 27.7 270.4 4.4 62.0 84 766 22 49 01 22 50 30 1257+12 17 24 58 26.8 268.9 4.4 61.3 -6 766 No stop 22 53 50 --- 17 28 19 26.1 269.3 4.5 61.3 194 792 22 50 31 22 54 30 J1300+141A 17 28 59 26.8 271.0 4.5 62.0 34 792 22 54 30 22 56 00 =1257+145 17 30 29 26.5 271.1 4.5 62.0 90 804 22 54 31 22 56 00 1257+12 17 30 29 25.7 269.6 4.5 61.3 -5 804 No stop 22 59 20 --- 17 33 50 25.0 270.0 4.6 61.3 195 830 22 56 01 22 59 20 J1300+141A 17 33 50 25.8 271.6 4.5 62.0 -6 830 No stop 23 00 50 =1257+145 17 35 20 25.5 271.8 4.6 62.0 84 841 22 59 21 23 00 50 1257+12 17 35 20 24.6 270.2 4.6 61.3 -5 841 No stop 23 04 10 --- 17 38 41 23.9 270.7 4.6 61.3 195 867 23 00 51 Schedule for SHANGHAI (Code Sh ) Page 5 PSR B1257+12 planetary system studies with EVN 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 27 Feb 2011 Day 58 --- 23 04 50 J1300+141A 17 39 21 24.6 272.3 4.6 62.0 35 867 23 04 50 23 06 20 =1257+145 17 40 51 24.3 272.4 4.7 62.0 90 879 23 04 51 23 06 20 1257+12 17 40 51 23.4 270.9 4.7 61.3 -5 879 No stop 23 09 40 --- 17 44 12 22.7 271.4 4.7 61.3 195 904 23 06 21 23 09 40 J1300+141A 17 44 12 23.6 272.9 4.7 61.9 -5 904 No stop 23 11 10 =1257+145 17 45 42 23.2 273.1 4.7 61.9 85 916 23 09 41 23 11 10 1257+12 17 45 42 22.4 271.6 4.8 61.3 -5 916 No stop 23 14 30 --- 17 49 02 21.7 272.0 4.8 61.3 195 942 23 11 11 23 15 10 J1300+141A 17 49 43 22.4 273.6 4.8 61.8 35 942 23 15 10 23 16 40 =1257+145 17 51 13 22.1 273.7 4.8 61.8 90 953 23 15 11 23 16 40 1257+12 17 51 13 21.2 272.3 4.8 61.3 -5 953 No stop 23 20 00 --- 17 54 33 20.5 272.7 4.9 61.2 195 979 23 16 41 23 20 00 J1300+141A 17 54 33 21.3 274.1 4.9 61.8 -5 979 No stop 23 21 30 =1257+145 17 56 04 21.0 274.3 4.9 61.7 85 991 23 20 01 23 21 30 1257+12 17 56 04 20.2 272.9 4.9 61.2 -5 991 No stop 23 24 50 --- 17 59 24 19.5 273.3 5.0 61.2 195 1017 23 21 31 23 25 30 J1300+141A 18 00 04 20.2 274.8 5.0 61.7 35 1017 23 25 30 23 27 00 =1257+145 18 01 34 19.8 275.0 5.0 61.6 90 1028 23 25 31 23 27 00 1257+12 18 01 34 19.0 273.6 5.0 61.1 -5 1028 No stop 23 30 20 --- 18 04 55 18.3 274.0 5.1 61.1 195 1054 23 27 01 23 30 20 J1300+141A 18 04 55 19.1 275.4 5.1 61.6 -5 1054 No stop 23 31 50 =1257+145 18 06 25 18.8 275.6 5.1 61.5 85 1066 23 30 21 23 31 50 1257+12 18 06 25 18.0 274.2 5.1 61.1 -5 1066 No stop 23 35 10 --- 18 09 46 17.3 274.6 5.2 61.0 195 1092 23 31 51 23 35 50 J1300+141A 18 10 26 18.0 276.1 5.2 61.4 35 1092 23 35 50 23 37 20 =1257+145 18 11 56 17.6 276.3 5.2 61.4 90 1103 23 35 51 23 37 20 1257+12 18 11 56 16.8 274.8 5.2 61.0 -5 1103 No stop 23 40 40 --- 18 15 17 16.1 275.3 5.2 60.9 195 1129 23 37 21 23 40 40 J1300+141A 18 15 17 16.9 276.7 5.2 61.3 -5 1129 No stop 23 42 10 =1257+145 18 16 47 16.6 276.9 5.3 61.3 85 1141 23 40 41 Schedule for SHANGHAI (Code Sh ) Page 6 PSR B1257+12 planetary system studies with EVN 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 27 Feb 2011 Day 58 --- 23 42 10 1257+12 18 16 47 15.8 275.4 5.3 60.9 -5 1141 No stop 23 45 30 --- 18 20 07 15.1 275.8 5.3 60.8 195 1166 23 42 11 23 46 10 J1300+141A 18 20 48 15.8 277.4 5.3 61.2 35 1166 23 46 10 23 48 10 =1257+145 18 22 48 15.3 277.6 5.4 61.1 120 1182 23 46 11 23 51 30 J1310+3220 18 26 08 24.6 294.2 5.3 67.5 179 1182 23 51 30 23 59 05 =1308+326 18 33 45 23.1 294.9 5.4 66.8 455 1241 23 51 31 --- Mon 28 Feb 2011 Day 59 --- 00 02 25 J1300+141A 18 37 05 12.3 279.3 5.6 60.7 179 1241 00 02 25 00 04 25 =1257+145 18 39 06 11.9 279.6 5.6 60.6 120 1256 00 02 26 00 04 25 1257+12 18 39 06 11.0 278.2 5.6 60.3 -6 1256 No stop 00 14 25 --- 18 49 07 8.9 279.4 5.8 60.0 594 1333 00 04 26 00 15 05 J1300+141A 18 49 47 9.6 280.9 5.8 60.2 35 1333 00 15 05 00 16 35 =1257+145 18 51 18 9.3 281.1 5.8 60.1 90 1345 00 15 06 00 16 35 1257+12 18 51 18 8.4 279.7 5.8 59.9 -6 1345 No stop 00 19 55 --- 18 54 38 7.7 280.1 5.9 59.8 194 1371 00 16 36 00 20 35 J1300+141A 18 55 18 8.5 281.6 5.9 59.9 35 1371 00 20 35 00 22 05 =1257+145 18 56 48 8.2 281.7 5.9 59.9 90 1382 00 20 36 00 22 05 1257+12 18 56 48 7.3 280.4 5.9 59.7 -6 1382 No stop 00 25 25 --- 19 00 09 6.6 280.8 6.0 59.5 194 1408 00 22 06 00 25 25 J1300+141A 19 00 09 7.5 282.1 6.0 59.7 -6 1408 No stop 00 26 55 =1257+145 19 01 39 7.1 282.3 6.0 59.7 84 1420 00 25 26 00 26 55 1257+12 19 01 39 6.3 281.0 6.0 59.5 -6 1420 No stop 00 30 15 --- 19 05 00 5.6 281.4 6.1 59.3 194 1446 00 26 56 00 30 55 J1300+141A 19 05 40 6.3 282.8 6.1 59.5 34 1446 00 30 55 00 32 25 =1257+145 19 07 10 6.0 283.0 6.1 59.4 90 1457 00 30 56 00 32 25 1257+12 19 07 10 5.1 281.7 6.1 59.2 -6 1457 No stop 00 35 45 --- 19 10 31 4.4 282.1 6.2 D 59.1 0 1483 00 32 26 00 35 45 J1300+141A 19 10 31 5.3 283.4 6.2 59.2 -5 1483 No stop 00 37 15 =1257+145 19 12 01 5.0 283.6 6.2 D 59.2 0 1495 00 35 46 Schedule for SHANGHAI (Code Sh ) Page 7 PSR B1257+12 planetary system studies with EVN 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 28 Feb 2011 Day 59 --- 02 52 00 J1522+3144 21 27 08 14.9 298.3 6.1 62.4 8020 1495 02 52 00 03 00 00 =1520+319 21 35 09 13.4 299.1 6.2 61.5 480 1557 02 52 01 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: EY013.L1024 Matching groups in /psr/soft/sched9.4/catalogs/freq.dat: sh18cm Huang Xinyong 27Sept05 ****** Only 244.98 of 256.00 MHz total bandwidth is within the IFs in the setup file before any FREQ or DOPPLER shifts. Setup group: 7 Station: SHANGHAI Total bit rate: 1024 Format: MKIV1:2 Bits per sample: 2 Sample rate: 32.000 Number of channels: 16 DBE type: Speedup factor: 0.50 Disk used to record data. 1st LO= 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 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 2 1 2 3 4 3 4 5 6 5 6 7 8 7 8 BBC SB= U U L L U U L L U U L L U U L L IF = C A C A C A C A C A C A C A C A The following frequency sets based on this setup were used. Frequency Set: 10 Setup file default. Used pcal sets: 1 LO sum= 1610.49 1610.49 1610.49 1610.49 1642.49 1642.49 1642.49 1642.49 1674.49 1674.49 1674.49 1674.49 1706.49 1706.49 1706.49 1706.49 BBC fr= 689.51 689.51 689.51 689.51 657.51 657.51 657.51 657.51 625.51 625.51 625.51 625.51 593.51 593.51 593.51 593.51 Bandwd= 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 16.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = 1MHZ PCALXB1= S1 S3 S5 S7 S9 S11 S13 S15 PCALXB2= S2 S4 S6 S8 S10 S12 S14 S16 PCALFR1= 490 510 490 510 490 510 490 510 PCALFR2= 490 510 490 510 490 510 490 510 Track assignments are: track1= 2, 10, 18, 26, 3, 11, 19, 27, 66, 74, 82, 90, 67, 75, 83, 91 barrel=roll_off SOURCES USED IN RECORDING SCANS -- PSR B1257+12 planetary system studies with EVN 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) * 1257+12 12 57 33.179926 * 13 00 03.089483 13 00 38.658126 0.00 B1257+12 12 57 04.86453 * 12 40 55.64224 12 37 02.46136 0.00 From catalog imbedded in main SCHED input file. 3.444 scan and 184.782 baseline hours in setup: EY013.L1024 * J0927+3902 09 23 55.319213 * 09 27 03.013934 09 27 47.770078 0.29 0923+392 39 15 23.56646 * 39 02 20.85186 38 59 16.47958 0.16 4C39.25 From catalog imbedded in main SCHED input file. J0927+39 GSFC 2010a astro solution 231732 Observations 0.133 scan and 8.800 baseline hours in setup: EY013.L1024 * J1300+141A 12 57 51.534337 * 13 00 20.918821 13 00 56.370192 0.05 J1300+1417 14 33 27.40940 * 14 17 18.53162 14 13 25.14456 0.07 1257+145 From catalog imbedded in main SCHED input file. J1300+14 GSFC 2010a astro solution 713 Observations 1.536 scan and 76.486 baseline hours in setup: EY013.L1024 * J1310+3220 13 08 07.560130 * 13 10 28.663849 13 11 02.294564 0.22 1308+326 32 36 40.23886 * 32 20 43.78293 32 16 50.38406 0.20 J1310+32 From catalog imbedded in main SCHED input file. GSFC 2010a astro solution 113439 Observations 0.126 scan and 8.342 baseline hours in setup: EY013.L1024 * J1522+3144 15 20 08.107590 * 15 22 09.991733 15 22 38.493631 0.02 1520+319 31 54 54.51271 * 31 44 14.38197 31 41 31.30781 0.02 J1522+31 From catalog imbedded in main SCHED input file. GSFC 2010a astro solution 2331 Observations 0.133 scan and 8.800 baseline hours in setup: EY013.L1024 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) 1257+12 145.8 J0927+3902 144.9 J1300+141A 145.6 J1310+3220 138.0 J1522+3144 111.3 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