COVER INFORMATION Station: VLBA_NL (Code Nl ) 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_NL (Code Nl ) 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 08 36 11 67.9 168.0 -0.3 -9.5 0 1 1 0 01 25 27 01 33 56 --- 08 44 11 68.2 173.0 -0.2 -5.5 479 F 1 3391 01 25 40 01 36 00 3C274 08 46 15 33.2 104.0 -3.7 -47.8 48 1 1 3391 01 35 30 01 50 58 --- 09 01 15 35.9 107.0 -3.5 -46.9 898 F 1 9575 01 35 43 01 51 41 3C279 09 01 58 18.6 116.3 -3.9 -42.2 2 1 1 9575 01 50 58 01 53 40 --- 09 03 58 18.9 116.7 -3.9 -42.0 120 F 1 10659 01 50 58 01 54 24 3C274 09 04 42 36.5 107.7 -3.4 -46.7 2 1 1 10659 01 53 40 02 09 21 --- 09 19 42 39.1 110.9 -3.2 -45.5 898 F 1 16933 01 53 40 02 10 05 3C279 09 20 25 21.6 120.0 -3.6 -40.5 2 1 2 16933 02 09 21 02 12 04 --- 09 22 25 21.9 120.4 -3.6 -40.3 120 R 1 17179 02 09 21 02 12 48 3C274 09 23 10 39.7 111.7 -3.1 -45.2 2 1 2 17179 02 12 04 02 27 46 --- 09 38 10 42.3 115.2 -2.9 -43.7 898 R 1 10903 02 12 04 02 28 30 3C279 09 38 54 24.5 123.9 -3.3 -38.5 2 1 2 10903 02 27 46 02 30 29 --- 09 40 54 24.8 124.3 -3.3 -38.3 120 R 1 9812 02 27 46 02 31 14 3C274 09 41 38 42.9 116.0 -2.8 -43.3 2 1 2 9812 02 30 29 02 46 11 --- 09 56 38 45.4 119.8 -2.6 -41.5 898 R 1 3533 02 30 29 02 46 56 3C279 09 57 22 27.3 127.9 -3.0 -36.3 2 1 2 3533 02 46 11 02 48 55 --- 09 59 22 27.6 128.4 -3.0 -36.0 120 R 1 2441 02 46 11 02 49 40 3C274 10 00 07 45.9 120.7 -2.5 -41.0 2 1 3 2441 02 48 55 03 04 37 --- 10 15 07 48.3 124.8 -2.3 -38.8 898 F 1 3840 02 48 55 03 05 22 3C279 10 15 52 30.0 132.2 -2.7 -33.7 2 1 3 3840 03 04 37 03 07 21 --- 10 17 52 30.2 132.7 -2.6 -33.4 120 F 1 4933 03 04 37 03 08 06 3C274 10 18 36 48.8 125.8 -2.2 -38.3 1 1 3 4933 03 07 21 03 23 03 --- 10 33 36 51.0 130.4 -2.0 -35.6 898 F 1 11214 03 07 21 03 23 48 3C279 10 34 21 32.4 136.8 -2.4 -30.9 1 1 3 11214 03 23 03 03 25 48 --- 10 36 21 32.7 137.3 -2.3 -30.6 120 F 1 12308 03 23 03 Schedule for VLBA_NL (Code Nl ) 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 26 32 3C274 10 37 05 51.5 131.5 -1.9 -34.9 1 1 4 12308 03 25 48 03 41 30 --- 10 52 05 53.5 136.5 -1.7 -31.7 898 R 1 16611 03 25 48 03 42 13 3C279 10 52 49 34.7 141.6 -2.1 -27.8 0 1 4 16611 03 41 30 03 44 13 --- 10 54 49 34.9 142.1 -2.0 -27.4 120 R 1 15521 03 41 30 03 46 13 OJ287 10 56 49 56.4 239.2 2.0 43.0 49 1 4 15521 03 45 43 03 51 12 --- 11 01 49 55.6 240.7 2.1 43.8 299 R 1 13327 03 45 56 03 53 02 J1159+2914 11 03 40 73.1 133.4 -0.9 -38.4 33 1 4 13327 03 52 32 03 58 01 =1156+295 11 08 40 73.7 136.4 -0.9 -36.1 299 R 1 11132 03 52 45 03 59 03 3C274 11 09 42 55.6 143.0 -1.4 -27.4 19 1 4 11132 03 58 33 04 14 01 --- 11 24 42 57.2 148.9 -1.1 -23.2 898 R 1 4948 03 58 46 04 14 45 3C279 11 25 26 38.1 150.7 -1.5 -21.5 0 1 4 4948 04 14 01 04 16 45 --- 11 27 26 38.2 151.3 -1.5 -21.1 120 R 1 3855 04 14 01 04 17 29 3C274 11 28 11 57.5 150.4 -1.0 -22.2 0 1 5 3855 04 16 45 04 32 27 --- 11 43 11 58.8 156.9 -0.8 -17.4 898 F 1 2426 04 16 45 04 33 11 3C279 11 43 55 39.6 156.3 -1.2 -17.6 0 1 5 2426 04 32 27 04 35 11 --- 11 45 55 39.7 156.9 -1.2 -17.1 120 F 1 3519 04 32 27 04 35 55 3C274 11 46 40 59.0 158.5 -0.7 -16.2 0 1 5 3519 04 35 11 04 50 53 --- 12 01 40 59.9 165.5 -0.5 -11.0 898 F 1 9800 04 35 11 04 51 37 3C279 12 02 24 40.8 162.1 -0.9 -13.3 0 1 5 9800 04 50 53 04 53 37 --- 12 04 24 40.9 162.7 -0.9 -12.9 120 F 1 10892 04 50 53 04 54 21 3C274 12 05 09 60.0 167.2 -0.4 -9.7 0 1 5 10892 04 53 37 05 09 18 --- 12 20 09 60.5 174.5 -0.2 -4.2 898 F 1 17170 04 53 37 05 10 02 3C279 12 20 52 41.7 168.1 -0.6 -8.9 0 1 6 17170 05 09 18 05 12 02 --- 12 22 52 41.8 168.7 -0.6 -8.4 120 R 1 16080 05 09 18 05 12 46 3C274 12 23 37 60.5 176.3 -0.1 -2.9 1 1 6 16080 05 12 02 05 27 44 --- 12 38 37 60.5 183.7 0.1 2.8 898 R 1 9801 05 12 02 05 28 28 3C279 12 39 21 42.2 174.2 -0.3 -4.3 2 1 6 9801 05 27 44 05 30 28 --- 12 41 21 42.3 174.9 -0.3 -3.8 120 R 1 8708 05 27 44 Schedule for VLBA_NL (Code Nl ) 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 31 12 3C274 12 42 06 60.5 185.4 0.2 4.1 2 1 6 8708 05 30 28 05 46 10 --- 12 57 06 60.0 192.8 0.4 9.7 898 R 1 2427 05 30 28 05 46 54 3C279 12 57 50 42.4 180.4 0.0 0.3 3 1 6 2427 05 46 10 05 48 54 --- 12 59 50 42.4 181.1 0.1 0.8 120 R 1 1334 05 46 10 05 49 38 3C274 13 00 35 59.9 194.4 0.5 11.0 4 1 7 1334 05 48 54 06 04 36 --- 13 15 35 59.0 201.4 0.7 16.2 898 F 1 4947 05 48 54 06 05 20 3C279 13 16 20 42.2 186.7 0.3 5.0 5 1 7 4947 06 04 36 06 07 20 --- 13 18 20 42.1 187.3 0.4 5.5 120 F 1 6041 06 04 36 06 09 20 J1159+2914 13 20 20 69.5 238.8 1.3 46.9 59 1 7 6041 06 08 50 06 14 19 =1156+295 13 25 20 68.6 240.8 1.4 48.2 299 F 1 8235 06 09 03 06 16 20 J1310+3220 13 27 21 80.0 200.5 0.3 18.0 88 1 7 8235 06 15 50 06 21 19 =1308+326 13 32 21 79.6 206.1 0.4 22.9 299 F 1 10430 06 16 03 06 24 06 3C274 13 35 08 57.4 210.0 1.1 22.5 117 1 7 10430 06 23 36 06 39 03 --- 13 50 08 55.9 216.1 1.3 26.7 898 F 1 16614 06 23 49 06 39 48 3C279 13 50 53 40.8 198.0 0.9 13.4 8 1 8 16614 06 39 03 06 41 47 --- 13 52 53 40.7 198.6 0.9 13.9 120 R 1 17494 06 39 03 06 42 32 3C274 13 53 37 55.5 217.4 1.4 27.6 9 1 8 17494 06 41 47 06 57 29 --- 14 08 37 53.7 222.9 1.6 31.3 898 R 1 11215 06 41 47 06 58 13 3C279 14 09 21 39.6 203.8 1.2 17.6 9 1 8 11215 06 57 29 07 00 13 --- 14 11 21 39.4 204.4 1.2 18.0 120 R 1 10126 06 57 29 07 00 56 3C274 14 12 05 53.3 224.1 1.7 32.1 10 1 8 10126 07 00 13 07 15 54 --- 14 27 05 51.2 229.1 1.9 35.3 898 R 1 3852 07 00 13 07 16 36 3C279 14 27 47 38.0 209.3 1.5 21.5 10 1 8 3852 07 15 54 07 18 36 --- 14 29 47 37.9 209.9 1.6 22.0 120 R 1 2769 07 15 54 07 19 19 3C274 14 30 30 50.8 230.2 2.0 35.9 11 1 9 2769 07 18 36 07 34 16 --- 14 45 30 48.5 234.7 2.2 38.5 898 F 1 3499 07 18 36 07 34 58 3C279 14 46 12 36.2 214.6 1.8 25.2 11 1 9 3499 07 34 16 07 36 58 --- 14 48 12 36.0 215.2 1.9 25.6 120 F 1 4575 07 34 16 Schedule for VLBA_NL (Code Nl ) 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 37 39 3C274 14 48 54 48.0 235.7 2.3 39.1 12 1 9 4575 07 36 58 07 52 37 --- 15 03 54 45.7 239.8 2.5 41.3 898 F 1 10836 07 36 58 07 53 17 3C279 15 04 35 34.2 219.6 2.1 28.5 12 1 9 10836 07 52 37 07 55 17 --- 15 06 35 33.9 220.1 2.2 28.9 120 F 1 11905 07 52 37 07 55 57 3C274 15 07 15 45.1 240.6 2.6 41.7 12 1 10 11905 07 55 17 08 10 55 --- 15 22 15 42.6 244.4 2.9 43.5 898 R 1 17042 07 55 17 08 11 34 3C279 15 22 54 31.9 224.3 2.4 31.6 12 1 10 17042 08 10 55 08 13 34 --- 15 24 54 31.6 224.8 2.5 31.9 120 R 1 15982 08 10 55 08 14 13 3C274 15 25 34 42.1 245.2 2.9 43.9 12 1 10 15982 08 13 34 08 29 11 --- 15 40 34 39.5 248.6 3.2 45.3 898 R 1 9739 08 13 34 08 29 49 3C279 15 41 13 29.4 228.7 2.7 34.3 13 1 10 9739 08 29 11 08 31 49 --- 15 43 13 29.1 229.2 2.8 34.6 120 R 1 8681 08 29 11 08 33 49 J1159+2914 15 45 13 43.3 273.3 3.8 58.5 84 1 10 8681 08 33 19 08 38 48 =1156+295 15 50 13 42.4 274.1 3.8 58.5 299 R 1 6487 08 33 32 08 39 25 J1310+3220 15 50 50 57.0 266.6 2.7 61.7 1 1 10 6487 08 38 48 08 44 24 =1308+326 15 55 50 56.1 267.5 2.8 61.8 299 R 1 4247 08 38 48 08 45 14 3C274 15 56 40 36.7 252.1 3.4 46.6 5 1 11 4247 08 44 44 09 00 12 --- 16 11 40 34.0 255.1 3.7 47.6 898 F 1 1936 08 44 57 09 00 54 3C279 16 12 22 24.8 235.8 3.3 38.3 18 1 11 1936 09 00 12 09 02 54 --- 16 14 22 24.5 236.2 3.3 38.5 120 F 1 3018 09 00 12 09 03 37 3C274 16 15 06 33.4 255.8 3.7 47.8 20 1 11 3018 09 02 54 09 18 35 --- 16 30 06 30.6 258.7 4.0 48.5 898 F 1 9291 09 02 54 09 19 19 3C279 16 30 50 21.9 239.6 3.6 40.3 21 1 11 9291 09 18 35 09 21 19 --- 16 32 50 21.6 240.0 3.6 40.5 120 F 1 10383 09 18 35 09 22 03 3C274 16 33 35 30.0 259.4 4.0 48.6 22 1 11 10383 09 21 19 09 37 01 --- 16 48 35 27.2 262.1 4.3 49.1 898 F 1 16664 09 21 19 09 37 44 3C279 16 49 19 18.9 243.3 3.9 42.1 21 1 12 16664 09 37 01 09 39 44 --- 16 51 19 18.5 243.7 3.9 42.2 120 R 1 17448 09 37 01 Schedule for VLBA_NL (Code Nl ) 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 40 27 3C274 16 52 02 26.6 262.7 4.3 49.2 21 1 12 17448 09 39 44 09 55 25 --- 17 07 02 23.8 265.4 4.6 49.6 898 R 1 11176 09 39 44 09 56 04 3C279 17 07 42 15.8 246.8 4.2 43.6 17 1 12 11176 09 55 25 09 58 04 --- 17 09 42 15.4 247.2 4.2 43.7 120 R 1 10115 09 55 25 09 58 42 3C274 17 10 20 23.2 265.9 4.7 49.6 17 1 12 10115 09 58 04 10 13 40 --- 17 25 20 20.4 268.5 4.9 49.7 898 R 1 3875 09 58 04 10 14 16 3C279 17 25 56 12.6 250.2 4.5 44.9 14 1 12 3875 10 13 40 10 16 15 --- 17 27 56 12.2 250.5 4.5 45.0 120 R 1 2838 10 13 40 10 16 52 3C274 17 28 33 19.8 269.0 5.0 49.8 15 1 13 2838 10 16 15 10 31 50 --- 17 43 33 17.0 271.5 5.2 49.7 898 F 1 3390 10 16 15 10 32 26 3C279 17 44 09 9.4 253.4 4.8 45.9 15 1 13 3390 10 31 50 10 34 26 --- 17 46 09 9.0 253.8 4.8 46.0 120 F 1 4430 10 31 50 10 35 02 3C274 17 46 46 16.4 272.0 5.3 49.7 16 1 13 4430 10 34 26 10 50 00 --- 18 01 46 13.6 274.5 5.5 49.6 898 F 1 10658 10 34 26 10 50 35 3C279 18 02 21 6.1 256.6 5.1 46.8 14 1 13 10658 10 50 00 10 52 35 --- 18 04 21 5.7 256.9 5.1 46.9 120 F 1 11689 10 50 00 10 53 09 3C274 18 04 56 13.0 275.0 5.6 49.5 14 1 14 11689 10 52 35 11 08 07 --- 18 19 56 10.3 277.5 5.8 49.2 898 R 1 17295 10 52 35 11 08 40 3C279 18 20 29 2.8 259.6 5.4 47.5 12 1 14 17295 11 08 07 11 10 39 --- 18 22 29 2.4 260.0 5.4 47.6 120 R 1 16279 11 08 07 11 13 18 1726+455 18 25 08 79.0 294.6 1.0 104.6 0 1 14 16279 11 12 48 11 16 18 --- 18 28 08 78.5 293.9 1.0 103.5 180 R 1 14882 11 13 01 11 19 36 1751+288 18 31 27 75.0 213.4 0.6 27.9 138 1 14 14882 11 19 06 11 22 35 --- 18 34 27 74.6 215.6 0.7 29.7 180 R 1 13485 11 19 19 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: 3 Station: VLBA_NL Total bit rate: 128 Format: VLBA1:4 Bits per sample: 2 Sample rate: 16.000 Number of channels: 4 Passes/head pos: 1 Speedup factor: 2.00 Tape used at high density at 80.000 ips. Time per pass is 44.00 minutes. 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: 3 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_auto 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