COVER INFORMATION Station: VLBA_BR (Code Br ) Experiment: bw082 M87 movie pilot. Walker, Ly, Junor, Hardee Exp. Code: bw082b 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_BR (Code Br ) 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 ---------------------------------------------------------------------------------------- --- Tue 11 Apr 2006 Day 101 --- 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 25 57 OJ287 06 43 45 51.5 125.1 -2.2 -35.5 0 1 1 0 01 25 27 01 33 56 --- 06 51 45 52.5 127.6 -2.1 -34.3 479 F 1 8 01 25 50 01 36 00 3C274 06 53 49 12.9 85.8 -5.6 -43.0 39 1 1 8 01 35 30 01 50 58 --- 07 08 49 15.4 88.6 -5.4 -43.1 898 F 1 23 01 35 53 01 54 24 3C274 07 12 16 16.0 89.2 -5.3 -43.1 199 1 1 23 01 53 54 02 09 21 --- 07 27 16 18.5 92.0 -5.1 -43.1 898 F 1 38 01 54 17 02 12 48 3C274 07 30 43 19.1 92.7 -5.0 -43.0 200 1 1 38 02 12 18 02 27 46 --- 07 45 43 21.6 95.5 -4.8 -42.8 898 F 1 53 02 12 41 02 28 30 3C279 07 46 27 3.9 103.2 -5.2 H -40.8 3 1 1 53 02 27 46 02 30 29 --- 07 48 27 4.2 103.6 -5.1 H -40.7 0 F 1 56 02 27 46 02 31 14 3C274 07 49 12 22.2 96.2 -4.7 -42.8 2 1 1 56 02 30 29 02 46 11 --- 08 04 12 24.6 99.1 -4.4 -42.4 898 F 1 71 02 30 29 02 46 56 3C279 08 04 56 6.9 106.7 -4.9 -40.0 3 1 1 71 02 46 11 02 48 55 --- 08 06 56 7.2 107.1 -4.8 -39.9 120 F 1 74 02 46 11 02 49 40 3C274 08 07 41 25.2 99.8 -4.4 -42.3 3 1 1 74 02 48 55 03 04 37 --- 08 22 41 27.7 102.9 -4.1 -41.8 898 F 1 89 02 48 55 03 05 22 3C279 08 23 25 9.8 110.3 -4.6 -39.0 3 1 1 89 03 04 37 03 07 21 --- 08 25 25 10.1 110.7 -4.5 -38.9 120 F 1 91 03 04 37 03 08 06 3C274 08 26 10 28.2 103.6 -4.1 -41.6 2 1 1 91 03 07 21 03 23 03 --- 08 41 10 30.6 106.8 -3.8 -40.9 898 F 1 107 03 07 21 03 23 48 3C279 08 41 54 12.7 114.0 -4.2 -37.8 2 1 1 107 03 23 03 03 25 48 --- 08 43 54 13.0 114.4 -4.2 -37.7 120 F 1 109 03 23 03 03 26 32 3C274 08 44 39 31.2 107.5 -3.8 -40.7 2 1 1 109 03 25 48 03 41 30 --- 08 59 39 33.6 110.8 -3.5 -39.7 898 F 1 124 03 25 48 03 42 13 3C279 09 00 23 15.4 117.8 -3.9 -36.4 2 1 1 124 03 41 30 03 44 13 --- 09 02 23 15.7 118.2 -3.9 -36.3 120 F 1 127 03 41 30 Schedule for VLBA_BR (Code Br ) 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 ---------------------------------------------------------------------------------------- --- Tue 11 Apr 2006 Day 101 --- 03 46 13 OJ287 09 04 23 61.9 184.6 0.2 3.3 21 1 1 127 03 45 43 03 51 12 --- 09 09 23 61.8 187.1 0.2 5.0 299 F 1 132 03 46 06 03 53 02 J1159+2914 09 11 14 52.7 104.9 -2.8 -47.6 50 1 1 132 03 52 32 03 58 01 =1156+295 09 16 14 53.5 106.1 -2.7 -47.3 299 F 1 138 03 52 55 03 59 03 3C274 09 17 15 36.3 114.9 -3.2 -38.3 21 1 1 138 03 58 33 04 14 01 --- 09 32 15 38.5 118.6 -3.0 -36.9 898 F 1 153 03 58 56 04 14 45 3C279 09 33 00 20.1 124.7 -3.4 -33.5 1 1 1 153 04 14 01 04 16 45 --- 09 35 00 20.4 125.2 -3.4 -33.3 120 F 1 155 04 14 01 04 17 29 3C274 09 35 45 39.0 119.4 -2.9 -36.5 1 1 1 155 04 16 45 04 32 27 --- 09 50 45 41.1 123.3 -2.7 -34.8 898 F 1 170 04 16 45 04 33 11 3C279 09 51 29 22.5 128.9 -3.1 -31.5 1 1 1 170 04 32 27 04 35 11 --- 09 53 29 22.8 129.4 -3.1 -31.2 120 F 1 173 04 32 27 04 35 55 3C274 09 54 14 41.6 124.2 -2.6 -34.4 1 1 1 173 04 35 11 04 50 53 --- 10 09 14 43.6 128.4 -2.4 -32.4 898 F 1 188 04 35 11 04 51 37 3C279 10 09 58 24.9 133.2 -2.8 -29.3 1 1 1 188 04 50 53 04 53 37 --- 10 11 58 25.1 133.7 -2.7 -29.0 120 F 1 191 04 50 53 04 54 21 3C274 10 12 42 44.1 129.4 -2.3 -31.9 0 1 1 191 04 53 37 05 09 18 --- 10 27 42 46.0 133.9 -2.1 -29.5 898 F 1 206 04 53 37 05 10 02 3C279 10 28 26 27.0 137.7 -2.5 -26.8 0 1 1 206 05 09 18 05 12 02 --- 10 30 26 27.3 138.2 -2.4 -26.5 120 F 1 209 05 09 18 05 12 46 3C274 10 31 11 46.4 134.9 -2.0 -28.9 0 1 1 209 05 12 02 05 27 44 --- 10 46 11 48.1 139.7 -1.7 -26.2 898 F 1 224 05 12 02 05 28 28 3C279 10 46 55 29.0 142.4 -2.2 -24.1 0 1 1 224 05 27 44 05 30 28 --- 10 48 55 29.2 143.0 -2.1 -23.8 120 F 1 227 05 27 44 05 31 12 3C274 10 49 40 48.5 140.9 -1.7 -25.5 0 1 1 227 05 30 28 05 46 10 --- 11 04 40 49.9 146.0 -1.4 -22.5 898 F 1 242 05 30 28 05 46 54 3C279 11 05 24 30.8 147.3 -1.9 -21.2 0 1 1 242 05 46 10 05 48 54 --- 11 07 24 31.0 147.9 -1.8 -20.9 120 F 1 244 05 46 10 Schedule for VLBA_BR (Code Br ) 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 ---------------------------------------------------------------------------------------- --- Tue 11 Apr 2006 Day 101 --- 05 49 38 3C274 11 08 09 50.3 147.2 -1.4 -21.7 0 1 1 244 05 48 54 06 04 36 --- 11 23 09 51.5 152.7 -1.1 -18.3 898 F 1 260 05 48 54 06 05 20 3C279 11 23 53 32.3 152.4 -1.5 -18.1 0 1 1 260 06 04 36 06 07 20 --- 11 25 53 32.5 153.0 -1.5 -17.7 120 F 1 262 06 04 36 06 09 20 J1159+2914 11 27 53 70.1 159.1 -0.5 -15.8 38 1 1 262 06 08 50 06 14 19 =1156+295 11 32 53 70.4 162.2 -0.4 -13.5 299 F 1 268 06 09 13 06 16 20 J1310+3220 11 34 55 66.0 122.5 -1.6 -41.8 89 1 1 268 06 15 50 06 21 19 =1308+326 11 39 55 66.7 124.4 -1.5 -40.6 299 F 1 273 06 16 13 06 24 06 3C274 11 42 42 52.8 160.2 -0.8 -13.4 133 1 1 273 06 23 36 06 39 03 --- 11 57 42 53.5 166.2 -0.6 -9.4 898 F 1 288 06 23 59 06 39 48 3C279 11 58 27 34.6 162.4 -1.0 -11.7 0 1 1 288 06 39 03 06 41 47 --- 12 00 27 34.7 163.0 -0.9 -11.3 120 F 1 291 06 39 03 06 42 32 3C274 12 01 11 53.7 167.6 -0.5 -8.5 0 1 1 291 06 41 47 06 57 29 --- 12 16 11 54.1 173.8 -0.2 -4.3 898 F 1 306 06 41 47 06 58 13 3C279 12 16 55 35.3 167.9 -0.7 -8.1 0 1 1 306 06 57 29 07 00 13 --- 12 18 55 35.4 168.5 -0.6 -7.7 120 F 1 308 06 57 29 07 00 56 3C274 12 19 38 54.1 175.2 -0.2 -3.3 0 1 1 308 07 00 13 07 15 54 --- 12 34 38 54.2 181.5 0.1 1.0 898 F 1 324 07 00 13 07 16 36 3C279 12 35 21 35.8 173.5 -0.4 -4.4 0 1 1 324 07 15 54 07 18 36 --- 12 37 21 35.9 174.1 -0.3 -3.9 120 F 1 326 07 15 54 07 19 19 3C274 12 38 04 54.2 182.9 0.1 2.0 0 1 1 326 07 18 36 07 34 16 --- 12 53 04 53.9 189.1 0.4 6.2 898 F 1 341 07 18 36 07 34 58 3C279 12 53 46 36.0 179.1 0.0 -0.6 0 1 1 341 07 34 16 07 36 58 --- 12 55 46 36.0 179.8 0.0 -0.2 120 F 1 344 07 34 16 07 37 39 3C274 12 56 28 53.8 190.5 0.4 7.2 0 1 1 344 07 36 58 07 52 37 --- 13 11 28 53.2 196.6 0.7 11.3 898 F 1 359 07 36 58 07 53 17 3C279 13 12 08 35.9 184.8 0.3 3.2 0 1 1 359 07 52 37 07 55 17 --- 13 14 08 35.9 185.4 0.3 3.6 120 F 1 362 07 52 37 Schedule for VLBA_BR (Code Br ) 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 ---------------------------------------------------------------------------------------- --- Tue 11 Apr 2006 Day 101 --- 07 55 57 3C274 13 14 49 53.1 197.9 0.7 12.1 0 1 1 362 07 55 17 08 10 55 --- 13 29 49 52.2 203.8 1.0 16.0 898 F 1 377 07 55 17 08 11 34 3C279 13 30 28 35.5 190.4 0.6 7.0 0 1 1 377 08 10 55 08 13 34 --- 13 32 28 35.5 191.0 0.6 7.4 120 F 1 379 08 10 55 08 14 13 3C274 13 33 07 52.0 205.0 1.0 16.8 0 1 1 379 08 13 34 08 29 11 --- 13 48 07 50.8 210.6 1.3 20.4 898 F 1 394 08 13 34 08 29 49 3C279 13 48 46 34.8 195.9 0.9 10.6 1 1 1 394 08 29 11 08 31 49 --- 13 50 46 34.7 196.5 0.9 11.0 120 F 1 397 08 29 11 08 33 49 J1159+2914 13 52 46 61.2 239.1 1.9 41.0 61 1 1 397 08 33 19 08 38 48 =1156+295 13 57 46 60.5 240.8 2.0 41.9 299 F 1 402 08 33 42 08 39 25 J1310+3220 13 58 23 71.8 213.9 0.8 26.1 8 1 1 402 08 38 48 08 44 24 =1308+326 14 03 23 71.3 216.9 0.9 28.3 299 F 1 408 08 38 48 08 45 14 3C274 14 04 14 49.3 216.3 1.6 23.9 0 1 1 408 08 44 44 09 00 12 --- 14 19 14 47.7 221.3 1.8 26.8 898 F 1 423 08 45 07 09 00 54 3C279 14 19 56 33.0 205.0 1.4 16.5 7 1 1 423 09 00 12 09 02 54 --- 14 21 56 32.9 205.5 1.4 16.8 120 F 1 425 09 00 12 09 03 37 3C274 14 22 40 47.4 222.4 1.9 27.4 8 1 1 425 09 02 54 09 18 35 --- 14 37 40 45.6 227.1 2.1 30.0 898 F 1 440 09 02 54 09 19 19 3C279 14 38 24 31.6 210.1 1.7 19.7 10 1 1 440 09 18 35 09 21 19 --- 14 40 24 31.4 210.7 1.7 20.0 120 F 1 443 09 18 35 09 22 03 3C274 14 41 09 45.2 228.1 2.2 30.6 11 1 1 443 09 21 19 09 37 01 --- 14 56 09 43.2 232.5 2.4 32.8 898 F 1 458 09 21 19 09 37 44 3C279 14 56 52 29.9 215.1 2.0 22.7 11 1 1 458 09 37 01 09 39 44 --- 14 58 52 29.7 215.7 2.0 23.0 120 F 1 461 09 37 01 09 40 27 3C274 14 59 36 42.8 233.4 2.5 33.3 11 1 1 461 09 39 44 09 55 25 --- 15 14 36 40.7 237.5 2.7 35.2 898 F 1 476 09 39 44 09 56 04 3C279 15 15 15 28.1 219.9 2.3 25.5 8 1 1 476 09 55 25 09 58 04 --- 15 17 15 27.8 220.4 2.3 25.8 120 F 1 479 09 55 25 Schedule for VLBA_BR (Code Br ) 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 ---------------------------------------------------------------------------------------- --- Tue 11 Apr 2006 Day 101 --- 09 58 42 3C274 15 17 54 40.3 238.3 2.8 35.6 8 1 1 479 09 58 04 10 13 40 --- 15 32 54 38.1 242.2 3.0 37.2 898 F 1 494 09 58 04 10 14 16 3C279 15 33 30 26.0 224.5 2.6 28.0 6 1 1 494 10 13 40 10 16 15 --- 15 35 30 25.8 224.9 2.6 28.3 120 F 1 496 10 13 40 10 16 52 3C274 15 36 07 37.6 242.9 3.1 37.5 7 1 1 496 10 16 15 10 31 50 --- 15 51 07 35.3 246.5 3.3 38.8 898 F 1 511 10 16 15 10 32 26 3C279 15 51 43 23.8 228.8 2.9 30.3 7 1 1 511 10 31 50 10 34 26 --- 15 53 43 23.6 229.3 3.0 30.6 120 F 1 514 10 31 50 10 35 02 3C274 15 54 20 34.9 247.3 3.4 39.1 8 1 1 514 10 34 26 10 50 00 --- 16 09 20 32.5 250.7 3.6 40.1 898 F 1 529 10 34 26 10 50 35 3C279 16 09 55 21.5 233.0 3.2 32.4 7 1 1 529 10 50 00 10 52 35 --- 16 11 55 21.2 233.5 3.3 32.6 120 F 1 531 10 50 00 10 53 09 3C274 16 12 30 32.0 251.4 3.7 40.3 7 1 1 531 10 52 35 11 08 07 --- 16 27 30 29.6 254.6 3.9 41.2 898 F 1 546 10 52 35 11 08 40 3C279 16 28 03 19.0 237.0 3.5 34.2 5 1 1 546 11 08 07 11 10 39 --- 16 30 03 18.7 237.4 3.6 34.4 120 F 1 549 11 08 07 11 13 18 1726+455 16 32 42 80.3 100.5 -0.9 -69.4 30 1 1 549 11 12 48 11 16 18 --- 16 35 42 80.7 101.7 -0.9 -68.8 180 F 1 552 11 13 11 11 19 36 1751+288 16 39 01 65.9 136.5 -1.2 -31.6 162 1 1 552 11 19 06 11 22 35 --- 16 42 01 66.2 137.9 -1.2 -30.7 180 F 1 556 11 19 29 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/arana/cwalker/sched/catalogs/freq.dat Setup group: 9 Station: VLBA_BR 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: 9 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 10.932367 0.21 0851+202 20 17 58.41741 * 20 06 30.64086 20 05 09.97530 0.40 J0854+2006 /home/arana/cwalker/sched/catalogs/sources.vlba J0854+20 VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro * OJ287 0.216 scan hours, 9.723 baseline hours above horizon. * J1159+2914 11 56 57.786209 * 11 59 31.833910 11 59 52.729654 0.23 1156+295 29 31 25.73874 * 29 14 43.82684 29 12 35.54423 0.40 J1159+29 /home/arana/cwalker/sched/catalogs/sources.vlba J1159+2914 VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro J1159+2914 0.249 scan hours, 11.219 baseline hours above horizon. J1230+1223 12 28 17.569279 * 12 30 49.423381 12 31 09.757820 0.31 1228+126 12 40 01.74901 * 12 23 28.04383 12 21 16.34555 0.20 * 3C274 /home/arana/cwalker/sched/catalogs/sources.vlba J1230+12 VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro J1230+1223 7.230 scan hours, 292.449 baseline hours above horizon. J1256-0547 12 53 35.831291 * 12 56 11.166559 12 56 31.754712 0.20 1253-055 -05 31 07.99586 *-05 47 21.52472 -05 49 33.01787 0.30 * 3C279 /home/arana/cwalker/sched/catalogs/sources.vlba J1256-05 VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro J1256-0547 0.964 scan hours, 36.334 baseline hours above horizon. * J1310+3220 13 08 07.560131 * 13 10 28.663850 13 10 48.127739 0.24 1308+326 32 36 40.23883 * 32 20 43.78290 32 18 35.95428 0.40 J1310+32 /home/arana/cwalker/sched/catalogs/sources.vlba J1310+3220 VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro J1310+3220 0.166 scan hours, 7.480 baseline hours above horizon. J1727+4530 17 26 01.198750 * 17 27 27.650804 17 27 39.423874 0.29 * 1726+455 45 33 04.55118 * 45 30 39.73133 45 29 55.47578 0.40 J1727+45 /home/arana/cwalker/sched/catalogs/sources.vlba J1727+4530 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 57.656264 0.23 * 1751+288 28 48 36.64959 * 28 48 04.93887 28 47 36.87293 0.40 J1753+28 /home/arana/cwalker/sched/catalogs/sources.vlba J1753+2848 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 109.3 J1159+2914 138.0 3C274 156.2 3C279 174.0 J1310+3220 139.4 1726+455 102.7 1751+288 104.1 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