COVER INFORMATION Station: VLBA_FD (Code Fd ) Experiment: bw082 M87 movie pilot. Walker, Ly, Junor, Hardee Exp. Code: bw082c Schedule Version: 1.00 Processed by SCHED version: 6.04 March 2006 PI: R.C. Walker Address: NRAO, P.O. Box O Socorro, NM 87801 USA Phone: +1-505-835-7247 (w) / +1-505-835-3972 (h) EMAIL: cwalker@nrao.edu Fax: +1-505-835-7027 Phone during observation: +1-505-835-7247 (w) / +1-505-835-3972 (h) Observing mode: VLBA Notes: COVER LETTER: This 6 session project samples different possible frame rates for a 7mm movie of M87. It is needed prior to full movie observations because the rate of changes near the core is not known. It is likely that they have been severly undersampled by previous observations. Each session will use the same schedule. The sessions should fall in the following windows (days) after the first: 0, 3, 6, 12-16, 31-39, 80-100. The program committee has asked me to coordinate with Phillip Hicks on the scheduling. I will do so. I propose to use long range forcasts to identify a 6 day window in which to start, and then, at 12, 31, and 80 days, identify a day within the 5, 9, and 21 day windows that follow in which to do a session. Here is the key information from the time allocation email: ------------------ PROPOSAL STATUS ( 01/06/05 ): Approved for dynamic scheduling, high priority Proposal Selection Committee - December 3, 2004: We ask Phillip Hicks to seek permission from Craig Walker before starting the observing sequence, rather than having Phillip be responsible for making the long-term weather forecast. CURRENT TIME ALLOCATION: 6 times 10.0 hrs dynamically scheduled centered at LST 12.5 with 128 Mbits/sec recording --------------------- I apologize for the long delay in starting this project, but it will take my attention once started and, for personal reasons, I did not feel I was in a position to provide that over the last year. ------------------------------------------------------------------------- Schedule for VLBA_FD (Code Fd ) Page 2 bw082 M87 movie pilot. Walker, Ly, Junor, Hardee 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. For disks, the footages are really the GBytes 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 14 Apr 2006 Day 104 --- Next scan frequencies: 43127.49 43127.49 43135.49 43135.49 Next BBC frequencies: 727.49 727.49 735.49 735.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 01 14 10 OJ287 07 46 42 71.3 120.3 -1.1 -52.2 0 1 1 0 01 13 40 01 22 08 --- 07 54 42 72.8 124.2 -1.0 -49.3 479 F 1 8 01 14 03 01 24 12 3C274 07 56 46 24.6 89.8 -4.6 -61.7 22 1 1 8 01 23 42 01 39 10 --- 08 11 46 27.8 91.8 -4.3 -61.7 898 F 1 23 01 24 05 01 39 53 3C279 08 12 29 13.1 105.0 -4.7 -56.7 8 1 1 23 01 39 10 01 41 53 --- 08 14 29 13.5 105.3 -4.7 -56.5 120 F 1 26 01 39 10 01 42 36 3C274 08 15 13 28.5 92.2 -4.3 -61.7 7 1 1 26 01 41 53 01 57 34 --- 08 30 13 31.8 94.2 -4.0 -61.5 898 F 1 41 01 41 53 01 58 17 3C279 08 30 57 16.9 107.7 -4.4 -55.5 8 1 1 41 01 57 34 02 00 17 --- 08 32 57 17.3 108.0 -4.4 -55.4 120 F 1 44 01 57 34 02 01 01 3C274 08 33 41 32.5 94.7 -4.0 -61.4 8 1 1 44 02 00 17 02 15 58 --- 08 48 41 35.7 96.9 -3.7 -61.0 898 F 1 59 02 00 17 02 16 42 3C279 08 49 25 20.7 110.5 -4.1 -54.1 8 1 1 59 02 15 58 02 18 42 --- 08 51 25 21.1 110.8 -4.1 -54.0 120 F 1 61 02 15 58 02 19 26 3C274 08 52 09 36.4 97.4 -3.7 -60.9 8 1 1 61 02 18 42 02 34 24 --- 09 07 09 39.6 99.7 -3.4 -60.3 898 F 1 77 02 18 42 02 35 08 3C279 09 07 53 24.4 113.4 -3.8 -52.5 8 1 1 77 02 34 24 02 37 07 --- 09 09 53 24.8 113.8 -3.8 -52.3 120 F 1 79 02 34 24 02 37 52 3C274 09 10 38 40.4 100.2 -3.3 -60.1 7 1 1 79 02 37 07 02 52 50 --- 09 25 38 43.5 102.7 -3.1 -59.2 898 F 1 94 02 37 07 02 53 34 3C279 09 26 23 28.0 116.6 -3.5 -50.6 7 1 1 94 02 52 50 02 55 34 --- 09 28 23 28.3 117.0 -3.5 -50.4 120 F 1 97 02 52 50 02 56 18 3C274 09 29 07 44.3 103.3 -3.0 -59.0 7 1 1 97 02 55 34 03 11 16 --- 09 44 07 47.4 106.1 -2.8 -57.8 898 F 1 112 02 55 34 03 12 00 3C279 09 44 52 31.5 120.0 -3.2 -48.5 6 1 1 112 03 11 16 03 14 00 --- 09 46 52 31.8 120.4 -3.2 -48.2 120 F 1 115 03 11 16 Schedule for VLBA_FD (Code Fd ) Page 3 bw082 M87 movie pilot. Walker, Ly, Junor, Hardee 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. For disks, the footages are really the GBytes 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 14 Apr 2006 Day 104 --- 03 14 44 3C274 09 47 36 48.1 106.7 -2.7 -57.5 6 1 1 115 03 14 00 03 29 42 --- 10 02 36 51.2 109.8 -2.5 -56.0 898 F 1 130 03 14 00 03 30 26 3C279 10 03 20 34.8 123.8 -2.9 -46.0 5 1 1 130 03 29 42 03 32 25 --- 10 05 20 35.2 124.2 -2.9 -45.7 120 F 1 133 03 29 42 03 34 25 OJ287 10 07 20 70.6 241.3 1.2 53.4 36 1 1 133 03 33 55 03 39 24 --- 10 12 20 69.7 243.3 1.3 54.9 299 F 1 138 03 34 18 03 41 15 J1159+2914 10 14 11 67.1 86.8 -1.8 -79.8 0 1 1 138 03 40 45 03 46 14 =1156+295 10 19 11 68.2 87.3 -1.7 -80.0 299 F 1 143 03 41 08 03 47 15 3C274 10 20 13 54.7 113.9 -2.2 -53.6 29 1 1 143 03 46 45 04 02 13 --- 10 35 13 57.6 118.0 -1.9 -51.1 898 F 1 158 03 47 08 04 02 57 3C279 10 35 57 40.4 131.2 -2.3 -40.6 4 1 1 158 04 02 13 04 04 57 --- 10 37 57 40.7 131.7 -2.3 -40.2 120 F 1 161 04 02 13 04 05 41 3C274 10 38 42 58.2 119.0 -1.9 -50.4 4 1 1 161 04 04 57 04 20 39 --- 10 53 42 61.0 123.8 -1.6 -47.1 898 F 1 176 04 04 57 04 21 23 3C279 10 54 26 43.3 136.0 -2.0 -36.9 3 1 1 176 04 20 39 04 23 23 --- 10 56 26 43.6 136.6 -2.0 -36.5 120 F 1 179 04 20 39 04 24 08 3C274 10 57 11 61.6 125.0 -1.6 -46.2 2 1 1 179 04 23 23 04 39 05 --- 11 12 11 64.2 130.8 -1.3 -41.9 898 F 1 194 04 23 23 04 39 49 3C279 11 12 55 45.9 141.3 -1.7 -32.7 2 1 1 194 04 39 05 04 41 49 --- 11 14 55 46.2 142.0 -1.7 -32.2 120 F 1 197 04 39 05 04 42 33 3C274 11 15 40 64.7 132.2 -1.3 -40.7 1 1 1 197 04 41 49 04 57 31 --- 11 30 40 67.0 139.3 -1.0 -35.1 898 F 1 212 04 41 49 04 58 14 3C279 11 31 24 48.2 147.2 -1.4 -28.0 0 1 1 212 04 57 31 05 00 14 --- 11 33 24 48.5 147.8 -1.4 -27.4 120 F 1 214 04 57 31 05 00 58 3C274 11 34 08 67.5 141.1 -1.0 -33.6 0 1 1 214 05 00 14 05 15 56 --- 11 49 08 69.3 149.7 -0.7 -26.4 898 F 1 230 05 00 14 05 16 40 3C279 11 49 52 50.2 153.5 -1.1 -22.7 0 1 1 230 05 15 56 05 18 40 --- 11 51 52 50.4 154.3 -1.1 -22.1 120 F 1 232 05 15 56 Schedule for VLBA_FD (Code Fd ) Page 4 bw082 M87 movie pilot. Walker, Ly, Junor, Hardee 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. For disks, the footages are really the GBytes 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 14 Apr 2006 Day 104 --- 05 19 24 3C274 11 52 37 69.7 151.9 -0.6 -24.5 0 1 1 232 05 18 40 05 34 22 --- 12 07 37 70.9 162.1 -0.4 -15.7 898 F 1 248 05 18 40 05 35 06 3C279 12 08 21 51.8 160.4 -0.8 -16.9 0 1 1 248 05 34 22 05 37 06 --- 12 10 21 51.9 161.2 -0.8 -16.2 120 F 1 250 05 34 22 05 37 51 3C274 12 11 06 71.1 164.7 -0.3 -13.5 0 1 1 250 05 37 06 05 52 48 --- 12 26 06 71.7 176.1 -0.1 -3.5 898 F 1 265 05 37 06 05 53 33 3C279 12 26 51 52.9 167.7 -0.5 -10.6 1 1 1 265 05 52 48 05 55 32 --- 12 28 51 52.9 168.5 -0.5 -9.9 120 F 1 268 05 52 48 05 57 32 J1159+2914 12 30 51 83.1 260.0 0.5 76.1 53 1 1 268 05 57 02 06 02 31 =1156+295 12 35 51 82.1 261.9 0.6 77.4 299 F 1 273 05 57 25 06 04 32 J1310+3220 12 37 52 82.8 434.5 -0.5 -101.2 0 1 1 273 06 04 02 06 09 31 =1308+326 12 42 52 83.8 432.5 -0.5 -103.9 299 F 1 279 06 04 25 06 12 18 3C274 12 45 39 71.4 191.2 0.2 9.8 0 1 1 279 06 11 48 06 27 16 --- 13 00 39 70.5 202.0 0.5 19.3 898 F 1 294 06 12 11 06 28 00 3C279 13 01 24 53.5 182.0 0.1 1.8 4 1 1 294 06 27 16 06 30 00 --- 13 03 24 53.5 182.9 0.1 2.5 120 F 1 296 06 27 16 06 30 44 3C274 13 04 08 70.2 204.4 0.5 21.4 5 1 1 296 06 30 00 06 45 41 --- 13 19 08 68.6 213.8 0.8 29.4 898 F 1 311 06 30 00 06 46 25 3C279 13 19 52 53.1 189.7 0.4 8.4 7 1 1 311 06 45 41 06 48 25 --- 13 21 52 53.0 190.5 0.4 9.1 120 F 1 314 06 45 41 06 49 08 3C274 13 22 36 68.2 215.8 0.9 31.0 7 1 1 314 06 48 25 07 04 06 --- 13 37 36 66.1 223.6 1.1 37.4 898 F 1 329 06 48 25 07 04 49 3C279 13 38 19 52.2 197.1 0.7 14.7 9 1 1 329 07 04 06 07 06 48 --- 13 40 19 52.1 197.9 0.7 15.4 120 F 1 332 07 04 06 07 07 31 3C274 13 41 01 65.6 225.2 1.2 38.7 10 1 1 332 07 06 48 07 22 28 --- 13 56 01 63.2 231.6 1.4 43.7 898 F 1 347 07 06 48 07 23 10 3C279 13 56 43 50.8 204.1 1.0 20.7 11 1 1 347 07 22 28 07 25 10 --- 13 58 43 50.6 204.9 1.0 21.3 120 F 1 350 07 22 28 Schedule for VLBA_FD (Code Fd ) Page 5 bw082 M87 movie pilot. Walker, Ly, Junor, Hardee 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. For disks, the footages are really the GBytes 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 14 Apr 2006 Day 104 --- 07 25 52 3C274 13 59 25 62.6 232.9 1.5 44.7 12 1 1 350 07 25 10 07 40 49 --- 14 14 25 60.0 238.2 1.7 48.5 898 F 1 365 07 25 10 07 41 30 3C279 14 15 06 49.0 210.6 1.3 26.1 13 1 1 365 07 40 49 07 43 29 --- 14 17 06 48.8 211.3 1.3 26.7 120 F 1 367 07 40 49 07 44 10 3C274 14 17 46 59.3 239.2 1.8 49.2 13 1 1 367 07 43 29 07 59 07 --- 14 32 46 56.5 243.6 2.0 52.1 898 F 1 382 07 43 29 07 59 47 3C279 14 33 26 46.8 216.6 1.6 31.0 14 1 1 382 07 59 07 08 01 46 --- 14 35 26 46.5 217.2 1.6 31.5 120 F 1 385 07 59 07 08 02 25 3C274 14 36 05 55.9 244.5 2.1 52.7 14 1 1 385 08 01 46 08 17 23 --- 14 51 05 52.9 248.2 2.3 54.9 898 F 1 400 08 01 46 08 18 02 3C279 14 51 44 44.3 222.0 1.9 35.4 15 1 1 400 08 17 23 08 20 01 --- 14 53 44 44.0 222.6 2.0 35.8 120 F 1 403 08 17 23 08 22 01 J1159+2914 14 55 44 52.1 279.3 2.9 76.6 76 1 1 403 08 21 31 08 27 00 =1156+295 15 00 44 51.1 279.8 3.0 76.3 299 F 1 408 08 21 54 08 27 37 J1310+3220 15 01 21 66.4 281.3 1.8 86.7 0 1 1 408 08 27 00 08 32 36 =1308+326 15 06 21 65.4 281.5 1.9 86.1 299 F 1 413 08 27 00 08 33 26 3C274 15 07 11 49.7 251.8 2.6 56.8 13 1 1 413 08 32 56 08 48 24 --- 15 22 11 46.6 254.7 2.9 58.2 898 F 1 428 08 33 19 08 49 07 3C279 15 22 54 39.5 230.2 2.4 41.6 20 1 1 428 08 48 24 08 51 06 --- 15 24 54 39.1 230.7 2.5 42.0 120 F 1 431 08 48 24 08 51 50 3C274 15 25 37 45.9 255.3 2.9 58.4 21 1 1 431 08 51 06 09 06 47 --- 15 40 37 42.7 258.0 3.2 59.5 898 F 1 446 08 51 06 09 07 31 3C279 15 41 21 36.3 234.4 2.7 44.7 23 1 1 446 09 06 47 09 09 31 --- 15 43 21 36.0 234.9 2.8 45.0 120 F 1 449 09 06 47 09 10 16 3C274 15 44 06 42.0 258.6 3.2 59.7 23 1 1 449 09 09 31 09 25 13 --- 15 59 06 38.8 261.0 3.5 60.4 898 F 1 464 09 09 31 09 25 57 3C279 15 59 50 33.0 238.3 3.1 47.4 22 1 1 464 09 25 13 09 27 56 --- 16 01 50 32.6 238.7 3.1 47.7 120 F 1 467 09 25 13 Schedule for VLBA_FD (Code Fd ) Page 6 bw082 M87 movie pilot. Walker, Ly, Junor, Hardee 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. For disks, the footages are really the GBytes 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 14 Apr 2006 Day 104 --- 09 28 39 3C274 16 02 33 38.1 261.5 3.5 60.6 22 1 1 467 09 27 56 09 43 37 --- 16 17 33 34.9 263.7 3.8 61.1 898 F 1 482 09 27 56 09 44 17 3C279 16 18 13 29.6 241.8 3.4 49.7 19 1 1 482 09 43 37 09 46 16 --- 16 20 13 29.2 242.2 3.4 49.9 120 F 1 484 09 43 37 09 46 55 3C274 16 20 51 34.2 264.2 3.8 61.2 18 1 1 484 09 46 16 10 01 52 --- 16 35 51 31.0 266.3 4.1 61.5 898 F 1 499 09 46 16 10 02 28 3C279 16 36 27 26.1 245.1 3.7 51.7 16 1 1 499 10 01 52 10 04 28 --- 16 38 27 25.7 245.4 3.7 51.9 120 F 1 502 10 01 52 10 05 04 3C274 16 39 04 30.3 266.7 4.1 61.6 16 1 1 502 10 04 28 10 20 02 --- 16 54 04 27.0 268.7 4.4 61.7 898 F 1 517 10 04 28 10 20 38 3C279 16 54 40 22.5 248.1 4.0 53.4 17 1 1 517 10 20 02 10 22 38 --- 16 56 40 22.1 248.4 4.0 53.6 120 F 1 520 10 20 02 10 23 15 3C274 16 57 17 26.3 269.1 4.4 61.7 17 1 1 520 10 22 38 10 38 12 --- 17 12 17 23.1 271.0 4.7 61.7 898 F 1 535 10 22 38 10 38 47 3C279 17 12 52 18.8 251.0 4.3 54.8 16 1 1 535 10 38 12 10 40 47 --- 17 14 52 18.4 251.3 4.3 55.0 120 F 1 537 10 38 12 10 41 22 3C274 17 15 27 22.4 271.4 4.7 61.7 15 1 1 537 10 40 47 10 56 19 --- 17 30 27 19.2 273.3 5.0 61.6 898 F 1 552 10 40 47 10 56 52 3C279 17 31 00 15.1 253.6 4.6 56.1 14 1 1 552 10 56 19 10 58 52 --- 17 33 00 14.7 253.9 4.6 56.2 120 F 1 555 10 56 19 11 01 31 1726+455 17 35 40 75.1 354.6 0.1 173.3 32 1 1 555 11 01 01 11 04 30 --- 17 38 40 75.0 352.5 0.2 170.8 180 F 1 558 11 01 24 11 07 48 1751+288 17 41 58 86.8 124.5 -0.2 -54.0 40 1 1 558 11 07 18 11 10 47 --- 17 44 58 87.3 132.7 -0.1 -46.1 180 F 1 561 11 07 41 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: bw082.set Matches group v7mm_c8 in /home/filehost/cwalker/sched/catalogs/freq.dat Setup group: 4 Station: VLBA_FD Total bit rate: 128 Format: VLBA1:4 Bits per sample: 2 Sample rate: 16.000 Number of channels: 4 Speedup factor: 2.00 Disk used to record data. 1st LO= 42400.00 42400.00 42400.00 42400.00 Net SB= U U U U Pol. = RCP LCP RCP LCP BBC = 1 2 3 4 BBC SB= U U U U IF = A C A C VLBA FE= 7mm omit 7mm omit VLBA Synth= 15.4 7.6 11.6 The following frequency sets based on this setup were used. Frequency Set: 4 Setup file default. Used pcal sets: 1 LO sum= 43127.49 43127.49 43135.49 43135.49 BBC fr= 727.49 727.49 735.49 735.49 Bandwd= 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 S1 S3 S1 S2 S3 S4 PCALXB2= S2 S4 S2 S4 M1 M2 M3 M4 PCALFR1= 510 510 6510 6510 0 0 0 0 PCALFR2= 510 510 6510 6510 0 0 0 0 Track assignments are: track1= 2, 18, 3, 19 barrel=roll_off SOURCE LIST -- bw082 M87 movie pilot. Walker, Ly, Junor, Hardee 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) J0854+2006 08 51 57.250618 * 08 54 48.874930 08 55 10.866022 0.21 0851+202 20 17 58.41741 * 20 06 30.64086 20 05 10.19179 0.40 J0854+20 /home/filehost/cwalker/sched/catalogs/sources.vlba * OJ287 VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 0.216 scan hours, 9.723 baseline hours above horizon. * J1159+2914 11 56 57.786209 * 11 59 31.833910 11 59 52.700672 0.23 1156+295 29 31 25.73874 * 29 14 43.82684 29 12 36.13857 0.40 J1159+29 /home/filehost/cwalker/sched/catalogs/sources.vlba VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 0.249 scan hours, 11.219 baseline hours above horizon. J1230+1223 12 28 17.569279 * 12 30 49.423381 12 31 09.742905 0.31 1228+126 12 40 01.74901 * 12 23 28.04383 12 21 16.71264 0.20 * 3C274 /home/filehost/cwalker/sched/catalogs/sources.vlba J1230+12 VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 7.230 scan hours, 292.449 baseline hours above horizon. J1256-0547 12 53 35.831291 * 12 56 11.166559 12 56 31.749447 0.20 1253-055 -05 31 07.99586 *-05 47 21.52472 -05 49 32.95757 0.30 * 3C279 /home/filehost/cwalker/sched/catalogs/sources.vlba J1256-05 VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 0.964 scan hours, 36.334 baseline hours above horizon. * J1310+3220 13 08 07.560131 * 13 10 28.663850 13 10 48.121939 0.24 1308+326 32 36 40.23883 * 32 20 43.78290 32 18 36.65081 0.40 J1310+32 /home/filehost/cwalker/sched/catalogs/sources.vlba VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 0.166 scan hours, 7.480 baseline hours above horizon. J1727+4530 17 26 01.198750 * 17 27 27.650804 17 27 39.510219 0.29 * 1726+455 45 33 04.55118 * 45 30 39.73133 45 29 56.02484 0.40 J1727+45 /home/filehost/cwalker/sched/catalogs/sources.vlba VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 0.050 scan hours, 2.244 baseline hours above horizon. J1753+2848 17 51 45.401869 * 17 53 42.473641 17 53 57.730499 0.23 * 1751+288 28 48 36.64959 * 28 48 04.93887 28 47 37.28540 0.40 J1753+28 /home/filehost/cwalker/sched/catalogs/sources.vlba VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 0.050 scan hours, 2.244 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) OJ287 106.4 J1159+2914 135.8 3C274 153.9 3C279 171.1 J1310+3220 138.1 1726+455 103.6 1751+288 105.8 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