COVER INFORMATION Station: VLBA_BR (Code Br ) Experiment: bw082 M87 movie pilot. Walker, Ly, Junor, Hardee Exp. Code: bw082a 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 ---------------------------------------------------------------------------------------- --- Sat 8 Apr 2006 Day 98 --- 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 37 45 OJ287 06 43 45 51.5 125.1 -2.2 -35.5 0 1 1 0 01 37 15 01 45 44 --- 06 51 45 52.5 127.6 -2.1 -34.3 479 F 1 8 01 37 38 01 47 48 3C274 06 53 49 12.9 85.8 -5.6 -43.0 39 1 1 8 01 47 18 02 02 45 --- 07 08 49 15.4 88.6 -5.4 -43.1 898 F 1 23 01 47 41 02 06 11 3C274 07 12 16 16.0 89.2 -5.3 -43.1 199 1 1 23 02 05 41 02 21 09 --- 07 27 16 18.5 92.0 -5.1 -43.1 898 F 1 38 02 06 04 02 24 36 3C274 07 30 43 19.1 92.7 -5.0 -43.0 200 1 1 38 02 24 06 02 39 34 --- 07 45 43 21.6 95.5 -4.8 -42.8 898 F 1 53 02 24 29 02 40 18 3C279 07 46 27 3.9 103.2 -5.2 H -40.8 3 1 1 53 02 39 34 02 42 17 --- 07 48 27 4.2 103.6 -5.1 H -40.7 0 F 1 56 02 39 34 02 43 02 3C274 07 49 12 22.2 96.2 -4.7 -42.8 2 1 1 56 02 42 17 02 57 59 --- 08 04 12 24.6 99.1 -4.4 -42.4 898 F 1 71 02 42 17 02 58 43 3C279 08 04 56 6.9 106.7 -4.9 -40.0 3 1 1 71 02 57 59 03 00 43 --- 08 06 56 7.2 107.1 -4.8 -39.9 120 F 1 74 02 57 59 03 01 27 3C274 08 07 41 25.2 99.8 -4.4 -42.3 3 1 1 74 03 00 43 03 16 25 --- 08 22 41 27.7 102.9 -4.1 -41.8 898 F 1 89 03 00 43 03 17 09 3C279 08 23 25 9.8 110.3 -4.6 -39.0 3 1 1 89 03 16 25 03 19 09 --- 08 25 25 10.1 110.7 -4.5 -38.9 120 F 1 91 03 16 25 03 19 54 3C274 08 26 10 28.2 103.6 -4.1 -41.6 2 1 1 91 03 19 09 03 34 51 --- 08 41 10 30.6 106.8 -3.8 -40.9 898 F 1 107 03 19 09 03 35 36 3C279 08 41 54 12.7 114.0 -4.2 -37.8 2 1 1 107 03 34 51 03 37 35 --- 08 43 54 13.0 114.4 -4.2 -37.7 120 F 1 109 03 34 51 03 38 20 3C274 08 44 39 31.2 107.5 -3.8 -40.7 2 1 1 109 03 37 35 03 53 17 --- 08 59 39 33.6 110.8 -3.5 -39.7 898 F 1 124 03 37 35 03 54 01 3C279 09 00 23 15.4 117.8 -3.9 -36.4 2 1 1 124 03 53 17 03 56 01 --- 09 02 23 15.7 118.2 -3.9 -36.3 120 F 1 127 03 53 17 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 ---------------------------------------------------------------------------------------- --- Sat 8 Apr 2006 Day 98 --- 03 58 01 OJ287 09 04 23 61.9 184.6 0.2 3.3 21 1 1 127 03 57 31 04 03 00 --- 09 09 23 61.8 187.1 0.2 5.0 299 F 1 132 03 57 54 04 04 50 J1159+2914 09 11 14 52.7 104.9 -2.8 -47.6 50 1 1 132 04 04 20 04 09 49 =1156+295 09 16 14 53.5 106.1 -2.7 -47.3 299 F 1 138 04 04 43 04 10 51 3C274 09 17 15 36.3 114.9 -3.2 -38.3 21 1 1 138 04 10 21 04 25 48 --- 09 32 15 38.5 118.6 -3.0 -36.9 898 F 1 153 04 10 44 04 26 33 3C279 09 33 00 20.1 124.7 -3.4 -33.5 1 1 1 153 04 25 48 04 28 32 --- 09 35 00 20.4 125.2 -3.4 -33.3 120 F 1 155 04 25 48 04 29 17 3C274 09 35 45 39.0 119.4 -2.9 -36.5 1 1 1 155 04 28 32 04 44 14 --- 09 50 45 41.1 123.3 -2.7 -34.8 898 F 1 170 04 28 32 04 44 59 3C279 09 51 29 22.5 128.9 -3.1 -31.5 1 1 1 170 04 44 14 04 46 58 --- 09 53 29 22.8 129.4 -3.1 -31.2 120 F 1 173 04 44 14 04 47 43 3C274 09 54 14 41.6 124.2 -2.6 -34.4 1 1 1 173 04 46 58 05 02 40 --- 10 09 14 43.6 128.4 -2.4 -32.4 898 F 1 188 04 46 58 05 03 25 3C279 10 09 58 24.9 133.2 -2.8 -29.3 1 1 1 188 05 02 40 05 05 24 --- 10 11 58 25.1 133.7 -2.7 -29.0 120 F 1 191 05 02 40 05 06 08 3C274 10 12 42 44.1 129.4 -2.3 -31.9 0 1 1 191 05 05 24 05 21 06 --- 10 27 42 46.0 133.9 -2.1 -29.5 898 F 1 206 05 05 24 05 21 50 3C279 10 28 26 27.0 137.7 -2.5 -26.8 0 1 1 206 05 21 06 05 23 50 --- 10 30 26 27.3 138.2 -2.4 -26.5 120 F 1 209 05 21 06 05 24 34 3C274 10 31 11 46.4 134.9 -2.0 -28.9 0 1 1 209 05 23 50 05 39 31 --- 10 46 11 48.1 139.7 -1.7 -26.2 898 F 1 224 05 23 50 05 40 16 3C279 10 46 55 29.0 142.4 -2.2 -24.1 0 1 1 224 05 39 31 05 42 15 --- 10 48 55 29.2 143.0 -2.1 -23.8 120 F 1 227 05 39 31 05 43 00 3C274 10 49 40 48.5 140.9 -1.7 -25.5 0 1 1 227 05 42 15 05 57 57 --- 11 04 40 49.9 146.0 -1.4 -22.5 898 F 1 242 05 42 15 05 58 42 3C279 11 05 24 30.8 147.3 -1.9 -21.2 0 1 1 242 05 57 57 06 00 41 --- 11 07 24 31.0 147.9 -1.8 -20.9 120 F 1 244 05 57 57 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 ---------------------------------------------------------------------------------------- --- Sat 8 Apr 2006 Day 98 --- 06 01 26 3C274 11 08 09 50.3 147.2 -1.4 -21.7 0 1 1 244 06 00 41 06 16 24 --- 11 23 09 51.5 152.7 -1.1 -18.3 898 F 1 260 06 00 41 06 17 08 3C279 11 23 53 32.3 152.4 -1.5 -18.1 0 1 1 260 06 16 24 06 19 08 --- 11 25 53 32.5 153.0 -1.5 -17.7 120 F 1 262 06 16 24 06 21 07 J1159+2914 11 27 53 70.1 159.1 -0.5 -15.8 38 1 1 262 06 20 37 06 26 07 =1156+295 11 32 53 70.4 162.2 -0.4 -13.5 299 F 1 268 06 21 00 06 28 08 J1310+3220 11 34 55 66.0 122.5 -1.6 -41.8 89 1 1 268 06 27 38 06 33 07 =1308+326 11 39 55 66.7 124.4 -1.5 -40.6 299 F 1 273 06 28 01 06 35 54 3C274 11 42 42 52.8 160.2 -0.8 -13.4 133 1 1 273 06 35 24 06 50 51 --- 11 57 42 53.5 166.2 -0.6 -9.4 898 F 1 288 06 35 47 06 51 35 3C279 11 58 27 34.6 162.4 -1.0 -11.7 0 1 1 288 06 50 51 06 53 35 --- 12 00 27 34.7 163.0 -0.9 -11.3 120 F 1 291 06 50 51 06 54 19 3C274 12 01 11 53.7 167.6 -0.5 -8.5 0 1 1 291 06 53 35 07 09 17 --- 12 16 11 54.1 173.8 -0.2 -4.3 898 F 1 306 06 53 35 07 10 01 3C279 12 16 55 35.3 167.9 -0.7 -8.1 0 1 1 306 07 09 17 07 12 00 --- 12 18 55 35.4 168.5 -0.6 -7.7 120 F 1 308 07 09 17 07 12 44 3C274 12 19 38 54.1 175.2 -0.2 -3.3 0 1 1 308 07 12 00 07 27 41 --- 12 34 38 54.2 181.5 0.1 1.0 898 F 1 324 07 12 00 07 28 24 3C279 12 35 21 35.8 173.5 -0.4 -4.4 0 1 1 324 07 27 41 07 30 24 --- 12 37 21 35.9 174.1 -0.3 -3.9 120 F 1 326 07 27 41 07 31 06 3C274 12 38 04 54.2 182.9 0.1 2.0 0 1 1 326 07 30 24 07 46 04 --- 12 53 04 53.9 189.1 0.4 6.2 898 F 1 341 07 30 24 07 46 46 3C279 12 53 46 36.0 179.1 0.0 -0.6 0 1 1 341 07 46 04 07 48 45 --- 12 55 46 36.0 179.8 0.0 -0.2 120 F 1 344 07 46 04 07 49 27 3C274 12 56 28 53.8 190.5 0.4 7.2 0 1 1 344 07 48 45 08 04 25 --- 13 11 28 53.2 196.6 0.7 11.3 898 F 1 359 07 48 45 08 05 05 3C279 13 12 08 35.9 184.8 0.3 3.2 0 1 1 359 08 04 25 08 07 05 --- 13 14 08 35.9 185.4 0.3 3.6 120 F 1 362 08 04 25 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 ---------------------------------------------------------------------------------------- --- Sat 8 Apr 2006 Day 98 --- 08 07 45 3C274 13 14 49 53.1 197.9 0.7 12.1 0 1 1 362 08 07 05 08 22 43 --- 13 29 49 52.2 203.8 1.0 16.0 898 F 1 377 08 07 05 08 23 22 3C279 13 30 28 35.5 190.4 0.6 7.0 0 1 1 377 08 22 43 08 25 22 --- 13 32 28 35.5 191.0 0.6 7.4 120 F 1 379 08 22 43 08 26 01 3C274 13 33 07 52.0 205.0 1.0 16.8 0 1 1 379 08 25 22 08 40 58 --- 13 48 07 50.8 210.6 1.3 20.4 898 F 1 394 08 25 22 08 41 37 3C279 13 48 46 34.8 195.9 0.9 10.6 1 1 1 394 08 40 58 08 43 37 --- 13 50 46 34.7 196.5 0.9 11.0 120 F 1 397 08 40 58 08 45 37 J1159+2914 13 52 46 61.2 239.1 1.9 41.0 61 1 1 397 08 45 07 08 50 36 =1156+295 13 57 46 60.5 240.8 2.0 41.9 299 F 1 402 08 45 30 08 51 13 J1310+3220 13 58 23 71.8 213.9 0.8 26.1 8 1 1 402 08 50 36 08 56 12 =1308+326 14 03 23 71.3 216.9 0.9 28.3 299 F 1 408 08 50 36 08 57 02 3C274 14 04 14 49.3 216.3 1.6 23.9 0 1 1 408 08 56 32 09 11 59 --- 14 19 14 47.7 221.3 1.8 26.8 898 F 1 423 08 56 55 09 12 42 3C279 14 19 56 33.0 205.0 1.4 16.5 7 1 1 423 09 11 59 09 14 42 --- 14 21 56 32.9 205.5 1.4 16.8 120 F 1 425 09 11 59 09 15 25 3C274 14 22 40 47.4 222.4 1.9 27.4 8 1 1 425 09 14 42 09 30 23 --- 14 37 40 45.6 227.1 2.1 30.0 898 F 1 440 09 14 42 09 31 07 3C279 14 38 24 31.6 210.1 1.7 19.7 10 1 1 440 09 30 23 09 33 06 --- 14 40 24 31.4 210.7 1.7 20.0 120 F 1 443 09 30 23 09 33 51 3C274 14 41 09 45.2 228.1 2.2 30.6 11 1 1 443 09 33 06 09 48 49 --- 14 56 09 43.2 232.5 2.4 32.8 898 F 1 458 09 33 06 09 49 32 3C279 14 56 52 29.9 215.1 2.0 22.7 11 1 1 458 09 48 49 09 51 32 --- 14 58 52 29.7 215.7 2.0 23.0 120 F 1 461 09 48 49 09 52 15 3C274 14 59 36 42.8 233.4 2.5 33.3 11 1 1 461 09 51 32 10 07 12 --- 15 14 36 40.7 237.5 2.7 35.2 898 F 1 476 09 51 32 10 07 52 3C279 15 15 15 28.1 219.9 2.3 25.5 8 1 1 476 10 07 12 10 09 52 --- 15 17 15 27.8 220.4 2.3 25.8 120 F 1 479 10 07 12 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 ---------------------------------------------------------------------------------------- --- Sat 8 Apr 2006 Day 98 --- 10 10 30 3C274 15 17 54 40.3 238.3 2.8 35.6 8 1 1 479 10 09 52 10 25 28 --- 15 32 54 38.1 242.2 3.0 37.2 898 F 1 494 10 09 52 10 26 04 3C279 15 33 30 26.0 224.5 2.6 28.0 6 1 1 494 10 25 28 10 28 03 --- 15 35 30 25.8 224.9 2.6 28.3 120 F 1 496 10 25 28 10 28 40 3C274 15 36 07 37.6 242.9 3.1 37.5 7 1 1 496 10 28 03 10 43 37 --- 15 51 07 35.3 246.5 3.3 38.8 898 F 1 511 10 28 03 10 44 14 3C279 15 51 43 23.8 228.8 2.9 30.3 7 1 1 511 10 43 37 10 46 13 --- 15 53 43 23.6 229.3 3.0 30.6 120 F 1 514 10 43 37 10 46 50 3C274 15 54 20 34.9 247.3 3.4 39.1 8 1 1 514 10 46 13 11 01 48 --- 16 09 20 32.5 250.7 3.6 40.1 898 F 1 529 10 46 13 11 02 23 3C279 16 09 55 21.5 233.0 3.2 32.4 7 1 1 529 11 01 48 11 04 22 --- 16 11 55 21.2 233.5 3.3 32.6 120 F 1 531 11 01 48 11 04 57 3C274 16 12 30 32.0 251.4 3.7 40.3 7 1 1 531 11 04 22 11 19 55 --- 16 27 30 29.6 254.6 3.9 41.2 898 F 1 546 11 04 22 11 20 27 3C279 16 28 03 19.0 237.0 3.5 34.2 5 1 1 546 11 19 55 11 22 27 --- 16 30 03 18.7 237.4 3.6 34.4 120 F 1 549 11 19 55 11 25 06 1726+455 16 32 42 80.3 100.5 -0.9 -69.4 30 1 1 549 11 24 36 11 28 06 --- 16 35 42 80.7 101.7 -0.9 -68.8 180 F 1 552 11 24 59 11 31 23 1751+288 16 39 00 65.9 136.5 -1.2 -31.6 162 1 1 552 11 30 53 11 34 23 --- 16 42 00 66.2 137.9 -1.2 -30.7 180 F 1 556 11 31 16 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 10.989287 0.21 0851+202 20 17 58.41741 * 20 06 30.64086 20 05 09.67465 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 52.744463 0.23 1156+295 29 31 25.73874 * 29 14 43.82684 29 12 34.98941 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 09.762255 0.31 1228+126 12 40 01.74901 * 12 23 28.04383 12 21 16.04731 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 31.752519 0.20 1253-055 -05 31 07.99586 *-05 47 21.52472 -05 49 32.98891 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 48.118906 0.24 1308+326 32 36 40.23883 * 32 20 43.78290 32 18 35.34772 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 39.330524 0.29 * 1726+455 45 33 04.55118 * 45 30 39.73133 45 29 55.12204 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 57.576149 0.23 * 1751+288 28 48 36.64959 * 28 48 04.93887 28 47 36.64878 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 112.3 J1159+2914 140.1 3C274 158.5 3C279 177.0 J1310+3220 140.5 1726+455 101.8 1751+288 102.4 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