COVER INFORMATION Station: VLBA_HN (Code Hn ) Experiment: BW085 / Lens J0134-0931 / Winn and Keeton Exp. Code: BW085 Schedule Version: 1.00 Processed by SCHED version: 6.02 July 2005 PI: Joshua N. Winn Address: Harvard-Smithsonian Center for Astrophysics 60 Garden St. MS-51 Cambridge, MA 02138 Phone: +1-617-384-9663 (w) / +1-617-666-2341 (h) EMAIL: jwinn@cfa.harvard.edu Fax: +1-617-495-7093 Phone during observation: +1-617-384-9663 (w) / +1-617-666-2341 (h) Observing mode: Standard 4cm band, 256-8-2 Notes: 256 Mbps has been approved for BW085 fringe finders: J2253+1608, J0555+3948 Schedule for VLBA_HN (Code Hn ) Page 2 BW085 / Lens J0134-0931 / Winn and Keeton 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). SYNC: Time correlator is expected to sync up. Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Fri 30 Dec 2005 Day 364 --- Next scan frequencies: 8399.49 8399.49 8407.49 8407.49 8415.49 8415.49 8423.49 8423.49 Next BBC frequencies: 799.49 799.49 807.49 807.49 815.49 815.49 823.49 823.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 22 15 00 GL0134 00 04 51 33.7 153.0 -1.5 -19.7 0 1 1 0 Stopped 22 20 00 --- 00 09 52 34.1 154.4 -1.4 -18.7 300 S 1 0 22 30 00 GL0134 00 19 54 34.9 157.3 -1.3 -16.7 592 1 1 0 22 30 00 22 39 00 --- 00 28 55 35.5 159.9 -1.1 -14.8 540 F 1 7200 22 30 08 22 39 00 J0141-0928 00 28 55 35.0 157.9 -1.2 -16.2 -7 1 1 7200 22 39 00 22 40 00 =0138-097 00 29 55 35.1 158.2 -1.2 -16.0 53 F 1 8000 22 39 00 22 40 00 GL0134 00 29 55 35.5 160.2 -1.1 -14.6 -7 1 1 8000 22 40 00 22 49 00 --- 00 38 57 36.0 162.8 -0.9 -12.6 533 F 1 15200 22 40 00 22 49 00 J0141-0928 00 38 57 35.7 160.8 -1.0 -14.1 -7 1 1 15200 22 49 00 22 50 00 =0138-097 00 39 57 35.8 161.1 -1.0 -13.9 53 F 1 16000 22 49 00 22 50 00 GL0134 00 39 57 36.1 163.1 -0.9 -12.4 -7 1 2 16000 22 50 00 22 59 00 --- 00 48 58 36.5 165.9 -0.8 -10.5 533 R 1 12000 22 50 00 22 59 00 J0141-0928 00 48 58 36.3 163.8 -0.9 -12.0 -7 1 2 12000 22 59 00 23 00 00 =0138-097 00 49 58 36.3 164.1 -0.9 -11.7 53 R 1 11200 22 59 00 23 00 00 GL0134 00 49 58 36.6 166.2 -0.7 -10.2 -7 1 2 11200 23 00 00 23 09 00 --- 00 59 00 36.9 168.9 -0.6 -8.2 533 R 1 4000 23 00 00 23 09 00 J0141-0928 00 59 00 36.7 166.8 -0.7 -9.7 -7 1 2 4000 23 09 00 23 10 00 =0138-097 01 00 00 36.8 167.1 -0.7 -9.5 53 R 1 3200 23 09 00 23 10 00 GL0134 01 00 00 37.0 169.2 -0.6 -8.0 -7 1 3 3200 23 10 00 23 19 00 --- 01 09 02 37.2 172.0 -0.4 -5.9 533 F 1 4000 23 10 00 23 19 00 J0141-0928 01 09 02 37.1 169.9 -0.5 -7.5 -7 1 3 4000 23 19 00 23 20 00 =0138-097 01 10 02 37.1 170.2 -0.5 -7.3 53 F 1 4800 23 19 00 23 20 00 GL0134 01 10 02 37.3 172.3 -0.4 -5.7 -7 1 3 4800 23 20 00 23 29 00 --- 01 19 03 37.5 175.1 -0.3 -3.7 533 F 1 12000 23 20 00 Schedule for VLBA_HN (Code Hn ) Page 3 BW085 / Lens J0134-0931 / Winn and Keeton 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). SYNC: Time correlator is expected to sync up. Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Fri 30 Dec 2005 Day 364 --- 23 29 00 J0141-0928 01 19 03 37.4 173.0 -0.4 -5.2 -7 1 3 12000 23 29 00 23 30 00 =0138-097 01 20 03 37.4 173.3 -0.4 -5.0 53 F 1 12800 23 29 00 23 30 00 GL0134 01 20 03 37.5 175.4 -0.2 -3.4 -7 1 4 12800 23 30 00 23 39 00 --- 01 29 05 37.6 178.2 -0.1 -1.3 533 R 1 15200 23 30 00 23 39 00 J0141-0928 01 29 05 37.5 176.1 -0.2 -2.9 -7 1 4 15200 23 39 00 23 40 00 =0138-097 01 30 05 37.5 176.4 -0.2 -2.7 53 R 1 14400 23 39 00 23 40 00 GL0134 01 30 05 37.6 178.5 -0.1 -1.1 -7 1 4 14400 23 40 00 23 49 00 --- 01 39 06 37.6 181.3 0.1 1.0 533 R 1 7200 23 40 00 23 49 00 J0141-0928 01 39 06 37.6 179.2 0.0 -0.6 -7 1 4 7200 23 49 00 23 50 00 =0138-097 01 40 07 37.6 179.5 0.0 -0.4 53 R 1 6400 23 49 00 23 50 00 GL0134 01 40 07 37.6 181.6 0.1 1.2 -7 1 5 6400 23 50 00 23 59 00 --- 01 49 08 37.5 184.4 0.2 3.3 533 F 1 800 23 50 00 23 59 00 J0141-0928 01 49 08 37.6 182.3 0.1 1.7 -7 1 5 800 23 59 00 23 59 59 =0138-097 01 50 08 37.6 182.6 0.1 1.9 52 F 1 1600 23 59 00 --- Sat 31 Dec 2005 Day 365 --- 00 00 00 GL0134 01 50 08 37.5 184.7 0.3 3.5 -7 1 5 1600 00 00 00 00 09 00 --- 01 59 10 37.3 187.5 0.4 5.6 533 F 1 8800 00 00 08 00 09 00 J0141-0928 01 59 10 37.5 185.4 0.3 4.0 -7 1 5 8800 00 09 00 00 10 00 =0138-097 02 00 10 37.4 185.7 0.3 4.2 53 F 1 9600 00 09 00 00 12 00 J2253+1608 02 02 10 42.0 251.0 3.1 46.1 71 1 5 9600 00 12 00 00 18 00 =2251+158 02 08 11 41.0 252.3 3.2 46.6 360 F 1 14400 00 12 08 00 18 00 GL0134 02 08 11 37.0 190.3 0.6 7.6 -47 1 6 14400 00 18 00 00 27 00 --- 02 17 13 36.7 193.1 0.7 9.7 493 R 1 13600 00 18 00 00 27 00 J0141-0928 02 17 13 37.0 191.0 0.6 8.1 -7 1 6 13600 00 27 00 00 28 00 =0138-097 02 18 13 37.0 191.3 0.6 8.4 53 R 1 12800 00 27 00 00 28 00 GL0134 02 18 13 36.7 193.4 0.7 9.9 -7 1 6 12800 00 28 00 00 37 00 --- 02 27 14 36.2 196.1 0.9 11.9 533 R 1 5600 00 28 00 00 37 00 J0141-0928 02 27 14 36.6 194.0 0.8 10.4 -7 1 6 5600 00 37 00 00 38 00 =0138-097 02 28 15 36.6 194.3 0.8 10.6 53 R 1 4800 00 37 00 Schedule for VLBA_HN (Code Hn ) Page 4 BW085 / Lens J0134-0931 / Winn and Keeton 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). SYNC: Time correlator is expected to sync up. Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Sat 31 Dec 2005 Day 365 --- 00 38 00 GL0134 02 28 15 36.2 196.4 0.9 12.1 -7 1 7 4800 00 38 00 00 47 00 --- 02 37 16 35.7 199.0 1.0 14.0 533 F 1 2400 00 38 00 00 47 00 J0141-0928 02 37 16 36.1 197.0 0.9 12.6 -7 1 7 2400 00 47 00 00 48 00 =0138-097 02 38 16 36.1 197.3 0.9 12.8 53 F 1 3200 00 47 00 00 48 00 GL0134 02 38 16 35.6 199.3 1.1 14.2 -7 1 7 3200 00 48 00 00 57 00 --- 02 47 18 35.0 202.0 1.2 16.1 533 F 1 10400 00 48 00 00 57 00 J0141-0928 02 47 18 35.5 200.0 1.1 14.7 -7 1 7 10400 00 57 00 00 58 00 =0138-097 02 48 18 35.5 200.3 1.1 14.9 53 F 1 11200 00 57 00 00 58 00 GL0134 02 48 18 35.0 202.3 1.2 16.3 -7 1 8 11200 00 58 00 01 07 00 --- 02 57 19 34.3 204.8 1.4 18.2 533 R 1 16800 00 58 00 01 07 00 J0141-0928 02 57 19 34.9 202.9 1.3 16.8 -7 1 8 16800 01 07 00 01 08 00 =0138-097 02 58 19 34.8 203.2 1.3 17.0 53 R 1 16000 01 07 00 01 08 00 GL0134 02 58 19 34.2 205.1 1.4 18.4 -7 1 8 16000 01 08 00 01 17 00 --- 03 07 21 33.5 207.7 1.5 20.2 533 R 1 8800 01 08 00 01 17 00 J0141-0928 03 07 21 34.1 205.8 1.4 18.8 -7 1 8 8800 01 17 00 01 18 00 =0138-097 03 08 21 34.0 206.0 1.4 19.0 53 R 1 8000 01 17 00 01 18 00 GL0134 03 08 21 33.4 207.9 1.6 20.4 -7 1 8 8000 01 18 00 01 27 00 --- 03 17 23 32.6 210.4 1.7 22.1 533 R 1 800 01 18 00 01 27 00 J0141-0928 03 17 23 33.3 208.6 1.6 20.8 -7 1 8 800 01 27 00 01 28 00 =0138-097 03 18 23 33.2 208.8 1.6 21.0 53 R 1 0 01 27 00 01 28 00 GL0134 03 18 23 32.5 210.7 1.7 22.3 -7 1 9 0 01 28 00 01 37 00 --- 03 27 24 31.6 213.1 1.9 23.9 533 F 1 7200 01 28 00 01 37 00 J0141-0928 03 27 24 32.3 211.3 1.8 22.7 -7 1 9 7200 01 37 00 01 38 00 =0138-097 03 28 24 32.2 211.6 1.8 22.9 53 F 1 8000 01 37 00 01 38 00 GL0134 03 28 24 31.5 213.4 1.9 24.1 -7 1 9 8000 01 38 00 01 47 00 --- 03 37 26 30.6 215.7 2.0 25.7 533 F 1 15200 01 38 00 01 47 00 J0141-0928 03 37 26 31.4 214.0 1.9 24.5 -7 1 9 15200 01 47 00 01 48 00 =0138-097 03 38 26 31.2 214.2 1.9 24.7 53 F 1 16000 01 47 00 Schedule for VLBA_HN (Code Hn ) Page 5 BW085 / Lens J0134-0931 / Winn and Keeton 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). SYNC: Time correlator is expected to sync up. Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Sat 31 Dec 2005 Day 365 --- 01 48 00 GL0134 03 38 26 30.5 216.0 2.1 25.9 -7 1 10 16000 01 48 00 01 57 00 --- 03 47 28 29.5 218.3 2.2 27.4 533 R 1 12000 01 48 00 01 57 00 J0141-0928 03 47 28 30.3 216.6 2.1 26.2 -8 1 10 12000 01 57 00 01 58 00 =0138-097 03 48 28 30.2 216.8 2.1 26.4 52 R 1 11200 01 57 00 01 58 00 GL0134 03 48 28 29.4 218.5 2.2 27.5 -8 1 10 11200 01 58 00 02 07 00 --- 03 57 29 28.3 220.8 2.4 29.0 532 R 1 4000 01 58 00 02 07 00 J0141-0928 03 57 29 29.2 219.1 2.3 27.9 -8 1 10 4000 02 07 00 02 08 00 =0138-097 03 58 29 29.1 219.4 2.3 28.1 52 R 1 3200 02 07 00 02 10 00 J0237+2848 04 00 30 68.3 236.2 1.4 44.0 36 1 11 3200 02 10 00 02 16 00 =0234+285 04 06 31 67.3 238.7 1.5 45.6 360 F 1 1600 02 10 08 02 16 00 3C48 04 06 31 59.5 263.9 2.5 60.5 -23 1 11 1600 02 16 00 02 22 00 --- 04 12 32 58.4 265.1 2.6 60.7 337 F 1 6400 02 16 00 02 32 00 GL0134 04 22 33 25.2 226.7 2.8 32.7 528 1 11 6400 02 32 00 02 41 00 --- 04 31 35 23.9 228.8 2.9 33.9 540 F 1 13600 02 32 08 02 41 00 J0141-0928 04 31 35 24.9 227.2 2.8 33.0 -8 1 11 13600 02 41 00 02 42 00 =0138-097 04 32 35 24.8 227.5 2.8 33.2 52 F 1 14400 02 41 00 02 42 00 GL0134 04 32 35 23.8 229.0 3.0 34.1 -8 1 12 14400 02 42 00 02 51 00 --- 04 41 36 22.5 231.0 3.1 35.2 532 R 1 13600 02 42 00 02 51 00 J0141-0928 04 41 36 23.5 229.5 3.0 34.4 -8 1 12 13600 02 51 00 02 52 00 =0138-097 04 42 37 23.4 229.7 3.0 34.5 52 R 1 12800 02 51 00 02 52 00 GL0134 04 42 37 22.4 231.2 3.1 35.3 -8 1 12 12800 02 52 00 03 01 00 --- 04 51 38 21.1 233.1 3.3 36.4 532 R 1 5600 02 52 00 03 01 00 J0141-0928 04 51 38 22.1 231.7 3.2 35.6 -8 1 12 5600 03 01 00 03 02 00 =0138-097 04 52 38 22.0 231.9 3.2 35.7 52 R 1 4800 03 01 00 03 02 00 GL0134 04 52 38 20.9 233.3 3.3 36.5 -8 1 13 4800 03 02 00 03 11 00 --- 05 01 40 19.6 235.2 3.4 37.6 532 F 1 2400 03 02 00 03 11 00 J0141-0928 05 01 40 20.6 233.8 3.3 36.8 -8 1 13 2400 03 11 00 03 12 00 =0138-097 05 02 40 20.5 234.0 3.3 36.9 52 F 1 3200 03 11 00 Schedule for VLBA_HN (Code Hn ) Page 6 BW085 / Lens J0134-0931 / Winn and Keeton 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). SYNC: Time correlator is expected to sync up. Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Sat 31 Dec 2005 Day 365 --- 03 12 00 GL0134 05 02 40 19.4 235.4 3.5 37.7 -8 1 13 3200 03 12 00 03 21 00 --- 05 11 41 18.1 237.3 3.6 38.7 532 F 1 10400 03 12 00 03 21 00 J0141-0928 05 11 41 19.1 235.9 3.5 37.9 -8 1 13 10400 03 21 00 03 22 00 =0138-097 05 12 41 19.0 236.1 3.5 38.0 52 F 1 11200 03 21 00 03 22 00 GL0134 05 12 41 17.9 237.5 3.6 38.8 -8 1 14 11200 03 22 00 03 31 00 --- 05 21 43 16.5 239.3 3.8 39.7 532 R 1 16800 03 22 00 03 31 00 J0141-0928 05 21 43 17.6 238.0 3.7 39.0 -8 1 14 16800 03 31 00 03 32 00 =0138-097 05 22 43 17.4 238.2 3.7 39.1 52 R 1 16000 03 31 00 03 32 00 GL0134 05 22 43 16.3 239.5 3.8 39.8 -8 1 14 16000 03 32 00 03 41 00 --- 05 31 45 14.9 241.3 3.9 40.6 532 R 1 8800 03 32 00 03 41 00 J0141-0928 05 31 45 16.0 240.0 3.8 40.0 -8 1 14 8800 03 41 00 03 42 00 =0138-097 05 32 45 15.9 240.2 3.9 40.1 52 R 1 8000 03 41 00 03 42 00 GL0134 05 32 45 14.8 241.5 4.0 40.7 -8 1 14 8000 03 42 00 03 51 00 --- 05 41 46 13.3 243.2 4.1 41.5 532 R 1 800 03 42 00 03 51 00 J0141-0928 05 41 46 14.4 241.9 4.0 40.9 -8 1 14 800 03 51 00 03 52 00 =0138-097 05 42 46 14.3 242.1 4.0 41.0 52 R 1 0 03 51 00 ----------- Tape Change ------------ 03 52 00 GL0134 05 42 46 13.1 243.4 4.1 41.6 -8 2 1 0 03 52 00 04 01 00 --- 05 51 48 11.6 245.1 4.3 42.3 532 F 1 7200 03 52 00 04 01 00 J0141-0928 05 51 48 12.8 243.8 4.2 41.8 -8 2 1 7200 04 01 00 04 02 00 =0138-097 05 52 48 12.6 244.0 4.2 41.8 52 F 1 8000 04 01 00 04 02 00 GL0134 05 52 48 11.5 245.3 4.3 42.4 -8 2 1 8000 04 02 00 04 11 00 --- 06 01 50 10.0 246.9 4.4 43.1 532 F 1 15200 04 02 00 04 11 00 J0141-0928 06 01 50 11.1 245.7 4.3 42.6 -8 2 1 15200 04 11 00 04 12 00 =0138-097 06 02 50 11.0 245.9 4.4 42.6 52 F 1 16000 04 11 00 04 12 00 GL0134 06 02 50 9.8 247.1 4.5 43.1 -8 2 2 16000 04 12 00 04 15 00 --- 06 05 50 9.3 247.7 4.5 43.4 172 R 1 16800 04 12 00 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: vlba.4cm Matches group v4cm_3 in /home/arana/cwalker/sched/catalogs/freq.dat Setup group: 2 Station: VLBA_HN Total bit rate: 256 Format: VLBA1:2 Bits per sample: 2 Sample rate: 16.000 Number of channels: 8 Passes/head pos: 1 Speedup factor: 1.00 Tape used at high density at 160.000 ips. Time per pass is 22.00 minutes. 1st LO= 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 Net SB= U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 2 3 4 5 6 7 8 BBC SB= U U U U U U U U IF = B D B D B D B D VLBA FE= omit 4cm omit 4cm VLBA Synth= 7.6 15.4 15.4 The following frequency sets based on this setup were used. Frequency Set: 2 Setup file default. Used pcal sets: 1 LO sum= 8399.49 8399.49 8407.49 8407.49 8415.49 8415.49 8423.49 8423.49 BBC fr= 799.49 799.49 807.49 807.49 815.49 815.49 823.49 823.49 Bandwd= 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 S1 S3 S5 S7 PCALXB2= S2 S4 S6 S8 S2 S4 S6 S8 PCALFR1= 510 510 510 510 6510 6510 6510 6510 PCALFR2= 510 510 510 510 6510 6510 6510 6510 Track assignments are: track1= 2, 10, 18, 26, 3, 11, 19, 27 barrel=roll_auto SOURCE LIST -- BW085 / Lens J0134-0931 / Winn and Keeton 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) * GL0134 01 32 06.404241 * 01 34 35.666870 01 34 53.889532 0.00 -09 46 23.09567 *-09 31 02.86710 -09 29 14.88792 0.00 From catalog imbedded in main SCHED input file. 4.700 scan hours, 288.045 baseline hours above horizon. J0137+3309 01 34 49.826428 * 01 37 41.299494 01 38 01.882241 0.90 0134+329 32 54 20.25964 * 33 09 35.13382 33 11 37.02034 0.91 * 3C48 /home/arana/cwalker/sched/catalogs/sources.vlba J0137+33 VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.100 scan hours, 4.946 baseline hours above horizon. * J0141-0928 01 38 56.858733 * 01 41 25.832165 01 41 44.059830 0.22 0138-097 -09 43 51.64872 *-09 28 43.67423 -09 26 56.90595 0.33 J0141-09 /home/arana/cwalker/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.516 scan hours, 25.273 baseline hours above horizon. * J0237+2848 02 34 55.589591 * 02 37 52.405678 02 38 14.073945 0.23 0234+285 28 35 11.40780 * 28 48 08.99005 28 49 53.77144 0.40 J0237+28 /home/arana/cwalker/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.100 scan hours, 6.484 baseline hours above horizon. * J2253+1608 22 51 29.519743 * 22 53 57.747942 22 54 14.634144 0.31 2251+158 15 52 54.34803 * 16 08 53.56086 16 10 49.58108 0.20 3C454.3 /home/arana/cwalker/sched/catalogs/sources.vlba J2253+16 VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.100 scan hours, 6.491 baseline hours above horizon. 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) GL0134 98.4 3C48 113.8 J0141-0928 99.9 J0237+2848 125.7 J2253+1608 73.3 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