COVER INFORMATION Station: SHANGHAI (Code Sh ) Experiment: Network Monitoring Expt Exp. Code: N02L1 Schedule Version: 1.00 Processed by SCHED version: 16 Oct. 2001 PI: Cormac Reynolds Address: JIVE Phone: +31-521-596512 EMAIL: reynolds@jive.nl Fax: Phone during observation: +31-521-596512 Observing mode: Notes: Network Monitoring Experiment Feb02 Please send tape by express to JIVE This NME uses one THIN tape/station Schedule for SHANGHAI (Code Sh ) Page 2 Network Monitoring Expt UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Mon 11 Feb 2002 Day 42 --- Next scan frequencies: 1634.49 1634.49 1634.49 1634.49 1650.49 1650.49 1650.49 1650.49 1666.49 1666.49 1666.49 1666.49 1682.49 1682.49 1682.49 1682.49 Next BBC frequencies: 565.51 565.51 565.51 565.51 549.51 549.51 549.51 549.51 533.51 533.51 533.51 533.51 517.51 517.51 517.51 517.51 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 20 00 00 J1159+2914 13 31 38 70.1 270.5 1.5 78.9 0 1 1 0 20 00 00 20 02 20 =1156+295 13 33 58 69.6 270.8 1.6 78.9 140 F 1 1867 20 02 20 FIRST_051 13 33 58 69.3 275.1 1.6 82.6 -11 1 1 1867 20 02 20 20 06 20 --- 13 37 59 68.5 275.5 1.7 82.4 229 F 1 5067 20 06 20 J1159+2914 13 37 59 68.7 271.3 1.6 78.8 -10 1 1 5067 20 06 20 20 08 40 =1156+295 13 40 19 68.2 271.6 1.7 78.8 130 F 1 6933 20 08 40 FIRST_051 13 40 19 68.0 275.6 1.7 82.3 -10 1 1 6933 20 08 40 20 12 40 --- 13 44 20 67.1 275.9 1.8 82.0 230 F 1 10133 20 12 40 J1159+2914 13 44 20 67.3 272.0 1.7 78.7 -10 1 1 10133 20 12 40 20 15 00 =1156+295 13 46 41 66.8 272.3 1.8 78.7 130 F 1 12000 20 15 00 FIRST_051 13 46 41 66.6 276.1 1.8 81.9 -10 1 1 12000 20 15 00 20 19 40 --- 13 51 21 65.6 276.5 1.9 81.6 270 F 1 15733 20 19 40 J1159+2914 13 51 21 65.8 272.8 1.9 78.5 -9 1 1 15733 20 19 40 20 22 00 =1156+295 13 53 42 65.3 273.0 1.9 78.5 131 F 1 17600 20 23 00 FIRST_051 13 54 42 64.9 276.7 2.0 81.4 51 1 2 17600 20 23 00 20 28 00 --- 13 59 43 63.8 277.1 2.0 81.1 300 R 1 13600 20 28 00 J1159+2914 13 59 43 64.1 273.7 2.0 78.3 -9 1 2 13600 20 28 00 20 30 20 =1156+295 14 02 03 63.6 273.9 2.0 78.2 131 R 1 11733 20 30 20 FIRST_051 14 02 03 63.3 277.3 2.1 81.0 -9 1 2 11733 20 30 20 20 35 20 --- 14 07 04 62.3 277.7 2.2 80.7 291 R 1 7733 20 35 20 J1159+2914 14 07 04 62.5 274.4 2.1 78.1 -9 1 2 7733 20 35 20 20 37 40 =1156+295 14 09 24 62.0 274.6 2.2 78.0 131 R 1 5867 Schedule for SHANGHAI (Code Sh ) Page 3 Network Monitoring Expt UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Mon 11 Feb 2002 Day 42 --- 20 37 40 FIRST_051 14 09 24 61.8 277.8 2.2 80.5 -8 1 2 5867 20 37 40 20 42 40 --- 14 14 25 60.7 278.2 2.3 80.2 292 R 1 1867 20 42 40 J1159+2914 14 14 25 60.9 275.1 2.2 77.8 -8 1 2 1867 20 42 40 20 45 00 =1156+295 14 16 45 60.4 275.3 2.3 77.7 132 R 1 0 20 46 00 FIRST_051 14 17 46 60.0 278.5 2.3 80.0 52 1 3 0 20 46 00 20 51 00 --- 14 22 46 59.0 278.8 2.4 79.7 300 F 1 4000 20 51 00 J1159+2914 14 22 46 59.1 275.9 2.4 77.4 -8 1 3 4000 20 51 00 20 53 20 =1156+295 14 25 07 58.6 276.1 2.4 77.3 132 F 1 5867 20 53 20 FIRST_051 14 25 07 58.5 279.0 2.5 79.6 -8 1 3 5867 20 53 20 20 58 20 --- 14 30 08 57.4 279.4 2.5 79.2 292 F 1 9867 20 58 20 J1159+2914 14 30 08 57.6 276.5 2.5 77.1 -8 1 3 9867 20 58 20 21 00 40 =1156+295 14 32 28 57.1 276.8 2.5 77.0 132 F 1 11733 21 00 40 FIRST_051 14 32 28 56.9 279.6 2.6 79.1 -8 1 3 11733 21 00 40 21 05 40 --- 14 37 29 55.8 279.9 2.7 78.7 292 F 1 15733 21 05 40 J1159+2914 14 37 29 56.0 277.2 2.6 76.8 -7 1 3 15733 21 05 40 21 08 00 =1156+295 14 39 49 55.5 277.4 2.7 76.7 133 F 1 17600 21 09 00 FIRST_051 14 40 49 55.1 280.2 2.7 78.5 52 1 4 17600 21 09 00 21 14 00 --- 14 45 50 54.1 280.6 2.8 78.2 300 R 1 13600 21 14 00 J1159+2914 14 45 50 54.2 278.0 2.8 76.4 -7 1 4 13600 21 14 00 21 16 20 =1156+295 14 48 11 53.7 278.2 2.8 76.2 133 R 1 11733 21 16 20 FIRST_051 14 48 11 53.6 280.7 2.8 78.0 -7 1 4 11733 21 16 20 21 21 20 --- 14 53 11 52.5 281.1 2.9 77.7 293 R 1 7733 21 21 20 J1159+2914 14 53 11 52.7 278.6 2.9 76.0 -7 1 4 7733 21 21 20 21 23 40 =1156+295 14 55 32 52.2 278.8 2.9 75.9 133 R 1 5867 21 27 40 J0927+3902 14 59 32 23.9 302.5 5.5 68.4 144 1 4 5867 21 27 40 21 35 00 =0923+392 15 06 54 22.6 303.1 5.7 67.5 440 R 1 0 21 38 00 J1159+2914 15 09 54 49.2 280.0 3.2 75.1 89 1 5 0 21 38 00 21 40 20 =1156+295 15 12 15 48.7 280.2 3.2 74.9 140 F 1 1867 21 40 20 FIRST_051 15 12 15 48.5 282.6 3.2 76.4 -7 1 5 1867 21 40 20 21 44 20 --- 15 16 15 47.7 282.9 3.3 76.1 233 F 1 5067 Schedule for SHANGHAI (Code Sh ) Page 4 Network Monitoring Expt UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Mon 11 Feb 2002 Day 42 --- 21 44 20 J1159+2914 15 16 15 47.8 280.6 3.3 74.7 -7 1 5 5067 21 44 20 21 46 40 =1156+295 15 18 36 47.3 280.8 3.3 74.6 133 F 1 6933 21 46 40 FIRST_051 15 18 36 47.2 283.0 3.4 75.9 -7 1 5 6933 21 46 40 21 50 40 --- 15 22 36 46.4 283.3 3.4 75.6 233 F 1 10133 21 50 40 J1159+2914 15 22 36 46.5 281.1 3.4 74.3 -6 1 5 10133 21 50 40 21 53 00 =1156+295 15 24 57 46.0 281.3 3.4 74.2 134 F 1 12000 21 53 00 FIRST_051 15 24 57 45.9 283.5 3.5 75.5 -6 1 5 12000 21 53 00 21 57 40 --- 15 29 37 44.9 283.9 3.5 75.1 274 F 1 15733 21 57 40 J1159+2914 15 29 37 45.0 281.7 3.5 73.9 -6 1 5 15733 21 57 40 22 00 00 =1156+295 15 31 58 44.5 281.9 3.5 73.7 134 F 1 17600 22 01 00 FIRST_051 15 32 58 44.2 284.2 3.6 74.9 54 1 6 17600 22 01 00 22 06 00 --- 15 37 59 43.2 284.5 3.7 74.5 300 R 1 13600 22 06 00 J1159+2914 15 37 59 43.3 282.4 3.6 73.4 -6 1 6 13600 22 06 00 22 08 20 =1156+295 15 40 19 42.8 282.6 3.7 73.2 134 R 1 11733 22 08 20 FIRST_051 15 40 19 42.7 284.7 3.7 74.4 -6 1 6 11733 22 08 20 22 13 20 --- 15 45 20 41.7 285.1 3.8 74.0 294 R 1 7733 22 13 20 J1159+2914 15 45 20 41.7 283.1 3.8 72.9 -6 1 6 7733 22 13 20 22 15 40 =1156+295 15 47 40 41.2 283.3 3.8 72.7 134 R 1 5867 22 15 40 FIRST_051 15 47 40 41.2 285.3 3.8 73.8 -6 1 6 5867 22 15 40 22 20 40 --- 15 52 41 40.2 285.7 3.9 73.4 294 R 1 1867 22 20 40 J1159+2914 15 52 41 40.2 283.7 3.9 72.4 -6 1 6 1867 22 20 40 22 23 00 =1156+295 15 55 02 39.7 283.9 3.9 72.3 134 R 1 0 ----------- Tape Change ------------ 22 38 00 J1159+2914 16 10 04 36.6 285.2 4.2 71.2 888 1 1 0 22 38 00 22 40 20 =1156+295 16 12 24 36.1 285.4 4.2 71.1 140 F 1 1867 22 40 20 FIRST_051 16 12 24 36.1 287.3 4.2 71.9 -6 1 1 1867 22 40 20 22 44 20 --- 16 16 25 35.3 287.7 4.3 71.6 234 F 1 5067 22 44 20 J1159+2914 16 16 25 35.3 285.8 4.3 70.8 -6 1 1 5067 22 44 20 22 46 40 =1156+295 16 18 45 34.8 286.0 4.3 70.6 134 F 1 6933 Schedule for SHANGHAI (Code Sh ) Page 5 Network Monitoring Expt UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Mon 11 Feb 2002 Day 42 --- 22 46 40 FIRST_051 16 18 45 34.8 287.8 4.4 71.4 -6 1 1 6933 22 46 40 22 50 40 --- 16 22 46 34.0 288.2 4.4 71.1 234 F 1 10133 22 50 40 J1159+2914 16 22 46 34.0 286.3 4.4 70.3 -6 1 1 10133 22 50 40 22 53 00 =1156+295 16 25 06 33.5 286.5 4.4 70.2 134 F 1 12000 22 53 00 FIRST_051 16 25 06 33.5 288.4 4.5 70.9 -6 1 1 12000 22 53 00 22 57 40 --- 16 29 47 32.6 288.8 4.5 70.5 274 F 1 15733 22 57 40 J1159+2914 16 29 47 32.5 287.0 4.5 69.8 -6 1 1 15733 22 57 40 23 00 00 =1156+295 16 32 08 32.1 287.2 4.5 69.6 134 F 1 17600 23 01 00 FIRST_051 16 33 08 31.9 289.1 4.6 70.2 54 1 2 17600 23 01 00 23 06 00 --- 16 38 09 30.9 289.5 4.7 69.8 300 R 1 13600 23 06 00 J1159+2914 16 38 09 30.8 287.7 4.6 69.2 -6 1 2 13600 23 06 00 23 08 20 =1156+295 16 40 29 30.3 287.9 4.7 69.0 134 R 1 11733 23 08 20 FIRST_051 16 40 29 30.4 289.7 4.7 69.6 -6 1 2 11733 23 08 20 23 13 20 --- 16 45 30 29.4 290.1 4.8 69.2 294 R 1 7733 23 13 20 J1159+2914 16 45 30 29.3 288.4 4.8 68.6 -6 1 2 7733 23 13 20 23 15 40 =1156+295 16 47 50 28.9 288.6 4.8 68.4 134 R 1 5867 23 15 40 FIRST_051 16 47 50 28.9 290.3 4.8 69.0 -5 1 2 5867 23 15 40 23 20 40 --- 16 52 51 27.9 290.8 4.9 68.6 295 R 1 1867 23 20 40 J1159+2914 16 52 51 27.8 289.1 4.9 68.0 -5 1 2 1867 23 20 40 23 23 00 =1156+295 16 55 11 27.4 289.3 4.9 67.9 135 R 1 0 23 27 00 OQ208 16 59 12 52.8 277.2 2.9 75.0 153 1 3 0 23 27 00 23 39 20 --- 17 11 34 50.2 278.3 3.1 74.5 740 F 1 9867 23 41 20 J1159+2914 17 13 34 23.7 291.0 5.2 66.4 30 1 3 9867 23 41 20 23 43 40 =1156+295 17 15 55 23.2 291.2 5.3 66.2 140 F 1 11733 23 43 40 FIRST_051 17 15 55 23.3 292.9 5.3 66.5 -5 1 3 11733 23 43 40 23 48 40 --- 17 20 56 22.4 293.4 5.4 66.1 295 F 1 15733 23 48 40 J1159+2914 17 20 56 22.2 291.7 5.4 65.7 -5 1 3 15733 23 48 40 23 51 00 =1156+295 17 23 16 21.7 291.9 5.4 65.5 135 F 1 17600 23 52 00 FIRST_051 17 24 16 21.7 293.7 5.4 65.8 55 1 4 17600 23 52 00 23 57 00 --- 17 29 17 20.7 294.1 5.5 65.3 300 R 1 13600 Schedule for SHANGHAI (Code Sh ) Page 6 Network Monitoring Expt UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Mon 11 Feb 2002 Day 42 --- 23 57 00 J1159+2914 17 29 17 20.5 292.5 5.5 65.0 -5 1 4 13600 23 57 00 23 59 20 =1156+295 17 31 37 20.1 292.7 5.5 64.8 135 R 1 11733 --- Start: Mon 11 Feb 2002 Day 42 -- Stop: Tue 12 Feb 2002 Day 43 --- 23 59 20 FIRST_051 17 31 37 20.3 294.4 5.6 65.1 -5 1 4 11733 23 59 20 00 04 20 --- 17 36 38 19.3 294.9 5.7 64.6 295 R 1 7733 00 04 20 J1159+2914 17 36 38 19.1 293.2 5.6 64.4 -5 1 4 7733 00 04 20 00 06 40 =1156+295 17 38 59 18.6 293.5 5.7 64.2 135 R 1 5867 00 06 40 FIRST_051 17 38 59 18.8 295.1 5.7 64.4 -5 1 4 5867 00 06 40 00 11 40 --- 17 43 59 17.9 295.6 5.8 63.9 295 R 1 1867 00 11 40 J1159+2914 17 43 59 17.7 294.0 5.7 63.7 -5 1 4 1867 00 11 40 00 14 00 =1156+295 17 46 20 17.2 294.2 5.8 63.5 135 R 1 0 00 15 00 FIRST_051 17 47 20 17.2 295.9 5.8 63.6 55 1 5 0 00 15 00 00 20 00 --- 17 52 21 16.3 296.4 5.9 63.1 300 F 1 4000 00 20 00 J1159+2914 17 52 21 16.0 294.8 5.9 62.9 -5 1 5 4000 00 20 00 00 22 20 =1156+295 17 54 41 15.6 295.1 5.9 62.7 135 F 1 5867 00 22 20 FIRST_051 17 54 41 15.8 296.7 6.0 62.9 -5 1 5 5867 00 22 20 00 27 20 --- 17 59 42 14.8 297.2 6.0 62.4 295 F 1 9867 00 27 20 J1159+2914 17 59 42 14.6 295.6 6.0 62.2 -5 1 5 9867 00 27 20 00 29 40 =1156+295 18 02 02 14.1 295.9 6.0 62.0 135 F 1 11733 00 29 40 FIRST_051 18 02 02 14.4 297.4 6.1 62.1 -5 1 5 11733 00 29 40 00 34 40 --- 18 07 03 13.5 297.9 6.2 61.6 295 F 1 15733 00 34 40 J1159+2914 18 07 03 13.2 296.4 6.1 61.5 -5 1 5 15733 00 34 40 00 37 00 =1156+295 18 09 24 12.7 296.6 6.2 61.3 135 F 1 17600 00 38 00 FIRST_051 18 10 24 12.8 298.3 6.2 61.3 55 1 6 17600 00 38 00 00 43 00 --- 18 15 25 11.9 298.8 6.3 60.7 300 R 1 13600 00 43 00 J1159+2914 18 15 25 11.6 297.3 6.3 60.7 -5 1 6 13600 00 43 00 00 45 20 =1156+295 18 17 45 11.1 297.5 6.3 60.5 135 R 1 11733 00 45 20 FIRST_051 18 17 45 11.4 299.1 6.3 60.5 -5 1 6 11733 00 45 20 00 50 20 --- 18 22 46 10.5 299.6 6.4 59.9 295 R 1 7733 Schedule for SHANGHAI (Code Sh ) Page 7 Network Monitoring Expt UP: D => Below limits; H => Below horizon mask. blank => Up. Early: Seconds between end of slew and start. Dwell: On source seconds. Tapes: Drive, Index, Start footage / Direction, Head Group, End footage. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Tue 12 Feb 2002 Day 43 --- 00 50 20 J1159+2914 18 22 46 10.2 298.1 6.4 59.9 -5 1 6 7733 00 50 20 00 52 40 =1156+295 18 25 06 9.8 298.4 6.4 59.7 135 R 1 5867 00 52 40 FIRST_051 18 25 06 10.1 299.9 6.5 59.7 -5 1 6 5867 00 52 40 00 57 40 --- 18 30 07 9.1 300.4 6.5 59.1 295 R 1 1867 00 57 40 J1159+2914 18 30 07 8.8 298.9 6.5 59.2 -5 1 6 1867 00 57 40 01 00 00 =1156+295 18 32 27 8.4 299.2 6.5 58.9 135 R 1 0 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: NME.18CM Matches group sh18cm in /juw15_0/scratch/cormac/sched/freq.dat Huang Xinyong 170300, dual pol but narrow(?) ****** Only 107.02 of 128.00 MHz total bandwidth is within the IFs in the setup file before any FREQ or DOPPLER shifts. Setup group: 9 Station: SHANGHAI Total bit rate: 512 Format: MKIV1:2 Bits per sample: 2 Sample rate: 16.000 Number of channels: 16 Passes/head pos: 1 Speedup factor: 1.00 Tape speeds: Low density - 270.000 ips, High density - 160.00 ips Time per pass for 17600 ft, High density tapes is: 00:22:00 Two heads will be used. Required by this setup. 1st LO= 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 2200.00 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: 9 Setup file default. Used pcal sets: 1 LO sum= 1634.49 1634.49 1634.49 1634.49 1650.49 1650.49 1650.49 1650.49 1666.49 1666.49 1666.49 1666.49 1682.49 1682.49 1682.49 1682.49 BBC fr= 565.51 565.51 565.51 565.51 549.51 549.51 549.51 549.51 533.51 533.51 533.51 533.51 517.51 517.51 517.51 517.51 Bandwd= 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 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 SOURCE LIST -- Network Monitoring Expt 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). Source Source position (RA/Dec) (B1950) (J2000) (Date) * FIRST_051 11 54 43.272401 * 11 57 17.726680 11 57 24.527360 30 58 42.26242 * 30 42 00.47980 30 41 12.25086 From catalog imbedded in main SCHED input file. * J0927+3902 09 23 55.319195 * 09 27 03.013916 09 27 11.523571 0923+392 39 15 23.56655 * 39 02 20.85195 39 01 47.63394 4C39.25 /aps3/sched/catalogs/sources.vlba 4C39.25 ICRF - Ext.1 Source - 1998 IERS Annual Report J0927+39 * J1159+2914 11 56 57.786211 * 11 59 31.833912 11 59 38.591266 1156+295 29 31 25.73884 * 29 14 43.82694 29 13 55.70427 1156+295 /aps3/sched/catalogs/sources.vlba J1159+29 ICRF - Ext.1 Source - 1998 IERS Annual Report J1407+2827 14 04 45.615151 * 14 07 00.394410 14 07 05.764340 1404+286 28 41 29.23495 * 28 27 14.68998 28 26 28.59044 J1407+28 /aps3/sched/catalogs/sources.vlba * OQ208 ICRF - Ext.1 Source - 1998 IERS Annual Report OQ208 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) FIRST_051 144.5 J0927+3902 154.6 J1159+2914 144.6 OQ208 117.1 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