COVER INFORMATION Station: VLBA_NL (Code Nl ) 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_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 ---------------------------------------------------------------------------------------- --- 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 08 36 11 67.9 168.0 -0.3 -9.5 0 1 1 0 01 37 15 01 45 44 --- 08 44 11 68.2 173.0 -0.2 -5.5 479 F 1 3391 01 37 28 01 47 48 3C274 08 46 15 33.2 104.0 -3.7 -47.8 48 1 1 3391 01 47 18 02 02 45 --- 09 01 15 35.9 107.0 -3.5 -46.9 898 F 1 9575 01 47 31 02 03 28 3C279 09 01 58 18.6 116.3 -3.9 -42.2 2 1 1 9575 02 02 45 02 05 28 --- 09 03 58 18.9 116.7 -3.9 -42.0 120 F 1 10659 02 02 45 02 06 11 3C274 09 04 42 36.5 107.7 -3.4 -46.7 2 1 1 10659 02 05 28 02 21 09 --- 09 19 42 39.1 110.9 -3.2 -45.5 898 F 1 16933 02 05 28 02 21 52 3C279 09 20 25 21.6 120.0 -3.6 -40.5 2 1 2 16933 02 21 09 02 23 52 --- 09 22 25 21.9 120.4 -3.6 -40.3 120 R 1 17179 02 21 09 02 24 36 3C274 09 23 10 39.7 111.7 -3.1 -45.2 2 1 2 17179 02 23 52 02 39 34 --- 09 38 10 42.3 115.2 -2.9 -43.7 898 R 1 10903 02 23 52 02 40 18 3C279 09 38 54 24.5 123.9 -3.3 -38.5 2 1 2 10903 02 39 34 02 42 17 --- 09 40 54 24.8 124.3 -3.3 -38.3 120 R 1 9812 02 39 34 02 43 02 3C274 09 41 38 42.9 116.0 -2.8 -43.3 2 1 2 9812 02 42 17 02 57 59 --- 09 56 38 45.4 119.8 -2.6 -41.5 898 R 1 3533 02 42 17 02 58 43 3C279 09 57 22 27.3 127.9 -3.0 -36.3 2 1 2 3533 02 57 59 03 00 43 --- 09 59 22 27.6 128.4 -3.0 -36.0 120 R 1 2441 02 57 59 03 01 27 3C274 10 00 07 45.9 120.7 -2.5 -41.0 2 1 3 2441 03 00 43 03 16 25 --- 10 15 07 48.3 124.8 -2.3 -38.8 898 F 1 3840 03 00 43 03 17 09 3C279 10 15 52 30.0 132.2 -2.7 -33.7 2 1 3 3840 03 16 25 03 19 09 --- 10 17 52 30.2 132.7 -2.6 -33.4 120 F 1 4933 03 16 25 03 19 54 3C274 10 18 36 48.8 125.8 -2.2 -38.3 1 1 3 4933 03 19 09 03 34 51 --- 10 33 36 51.0 130.4 -2.0 -35.6 898 F 1 11214 03 19 09 03 35 36 3C279 10 34 21 32.4 136.8 -2.4 -30.9 1 1 3 11214 03 34 51 03 37 35 --- 10 36 21 32.7 137.3 -2.3 -30.6 120 F 1 12308 03 34 51 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 ---------------------------------------------------------------------------------------- --- Sat 8 Apr 2006 Day 98 --- 03 38 20 3C274 10 37 05 51.5 131.5 -1.9 -34.9 1 1 4 12308 03 37 35 03 53 17 --- 10 52 05 53.5 136.5 -1.7 -31.7 898 R 1 16611 03 37 35 03 54 01 3C279 10 52 49 34.7 141.6 -2.1 -27.8 0 1 4 16611 03 53 17 03 56 01 --- 10 54 49 34.9 142.1 -2.0 -27.4 120 R 1 15521 03 53 17 03 58 01 OJ287 10 56 49 56.4 239.2 2.0 43.0 49 1 4 15521 03 57 31 04 03 00 --- 11 01 49 55.6 240.7 2.1 43.8 299 R 1 13327 03 57 44 04 04 50 J1159+2914 11 03 40 73.1 133.4 -0.9 -38.4 33 1 4 13327 04 04 20 04 09 49 =1156+295 11 08 40 73.7 136.4 -0.9 -36.1 299 R 1 11132 04 04 33 04 10 51 3C274 11 09 42 55.6 143.0 -1.4 -27.4 19 1 4 11132 04 10 21 04 25 48 --- 11 24 42 57.2 148.9 -1.1 -23.2 898 R 1 4949 04 10 34 04 26 33 3C279 11 25 26 38.1 150.7 -1.5 -21.5 0 1 4 4949 04 25 48 04 28 32 --- 11 27 26 38.2 151.3 -1.5 -21.1 120 R 1 3855 04 25 48 04 29 17 3C274 11 28 11 57.5 150.4 -1.0 -22.2 0 1 5 3855 04 28 32 04 44 14 --- 11 43 11 58.8 156.9 -0.8 -17.4 898 F 1 2425 04 28 32 04 44 59 3C279 11 43 55 39.6 156.3 -1.2 -17.6 0 1 5 2425 04 44 14 04 46 58 --- 11 45 55 39.7 156.9 -1.2 -17.1 120 F 1 3519 04 44 14 04 47 43 3C274 11 46 40 59.0 158.5 -0.7 -16.2 0 1 5 3519 04 46 58 05 02 40 --- 12 01 40 59.9 165.5 -0.5 -11.0 898 F 1 9800 04 46 58 05 03 25 3C279 12 02 24 40.8 162.1 -0.9 -13.3 0 1 5 9800 05 02 40 05 05 24 --- 12 04 24 40.9 162.7 -0.9 -12.9 120 F 1 10892 05 02 40 05 06 08 3C274 12 05 09 60.0 167.2 -0.4 -9.7 0 1 5 10892 05 05 24 05 21 06 --- 12 20 09 60.5 174.5 -0.2 -4.2 898 F 1 17170 05 05 24 05 21 50 3C279 12 20 52 41.7 168.1 -0.6 -8.9 0 1 6 17170 05 21 06 05 23 50 --- 12 22 52 41.8 168.7 -0.6 -8.4 120 R 1 16080 05 21 06 05 24 34 3C274 12 23 37 60.5 176.3 -0.1 -2.9 1 1 6 16080 05 23 50 05 39 31 --- 12 38 37 60.5 183.7 0.1 2.8 898 R 1 9801 05 23 50 05 40 16 3C279 12 39 21 42.2 174.2 -0.3 -4.3 2 1 6 9801 05 39 31 05 42 15 --- 12 41 21 42.3 174.9 -0.3 -3.8 120 R 1 8708 05 39 31 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 ---------------------------------------------------------------------------------------- --- Sat 8 Apr 2006 Day 98 --- 05 43 00 3C274 12 42 06 60.5 185.4 0.2 4.1 2 1 6 8708 05 42 15 05 57 57 --- 12 57 06 60.0 192.8 0.4 9.7 898 R 1 2427 05 42 15 05 58 42 3C279 12 57 50 42.4 180.4 0.0 0.3 3 1 6 2427 05 57 57 06 00 41 --- 12 59 50 42.4 181.1 0.1 0.8 120 R 1 1334 05 57 57 06 01 26 3C274 13 00 35 59.9 194.4 0.5 11.0 4 1 7 1334 06 00 41 06 16 24 --- 13 15 35 59.0 201.4 0.7 16.2 898 F 1 4947 06 00 41 06 17 08 3C279 13 16 20 42.2 186.7 0.3 5.0 5 1 7 4947 06 16 24 06 19 08 --- 13 18 20 42.1 187.3 0.4 5.5 120 F 1 6041 06 16 24 06 21 07 J1159+2914 13 20 20 69.5 238.8 1.3 46.9 59 1 7 6041 06 20 37 06 26 07 =1156+295 13 25 20 68.6 240.8 1.4 48.2 299 F 1 8235 06 20 50 06 28 08 J1310+3220 13 27 21 80.0 200.5 0.3 18.0 88 1 7 8235 06 27 38 06 33 07 =1308+326 13 32 21 79.6 206.1 0.4 22.9 299 F 1 10430 06 27 51 06 35 54 3C274 13 35 08 57.4 210.0 1.1 22.5 117 1 7 10430 06 35 24 06 50 51 --- 13 50 08 55.9 216.1 1.3 26.7 898 F 1 16614 06 35 37 06 51 35 3C279 13 50 53 40.8 198.0 0.9 13.4 8 1 8 16614 06 50 51 06 53 35 --- 13 52 53 40.7 198.6 0.9 13.9 120 R 1 17494 06 50 51 06 54 19 3C274 13 53 37 55.5 217.4 1.4 27.6 9 1 8 17494 06 53 35 07 09 17 --- 14 08 37 53.7 222.9 1.6 31.3 898 R 1 11215 06 53 35 07 10 01 3C279 14 09 21 39.6 203.8 1.2 17.6 9 1 8 11215 07 09 17 07 12 00 --- 14 11 21 39.4 204.4 1.2 18.0 120 R 1 10126 07 09 17 07 12 44 3C274 14 12 05 53.3 224.1 1.7 32.1 10 1 8 10126 07 12 00 07 27 41 --- 14 27 05 51.2 229.1 1.9 35.3 898 R 1 3852 07 12 00 07 28 24 3C279 14 27 47 38.0 209.3 1.5 21.5 10 1 8 3852 07 27 41 07 30 24 --- 14 29 47 37.9 209.9 1.6 22.0 120 R 1 2769 07 27 41 07 31 06 3C274 14 30 30 50.8 230.2 2.0 35.9 11 1 9 2769 07 30 24 07 46 04 --- 14 45 30 48.5 234.7 2.2 38.5 898 F 1 3499 07 30 24 07 46 46 3C279 14 46 12 36.2 214.6 1.8 25.2 11 1 9 3499 07 46 04 07 48 45 --- 14 48 12 36.0 215.2 1.9 25.6 120 F 1 4575 07 46 04 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 ---------------------------------------------------------------------------------------- --- Sat 8 Apr 2006 Day 98 --- 07 49 27 3C274 14 48 54 48.0 235.7 2.3 39.1 12 1 9 4575 07 48 45 08 04 25 --- 15 03 54 45.7 239.8 2.5 41.3 898 F 1 10836 07 48 45 08 05 05 3C279 15 04 35 34.2 219.6 2.1 28.5 12 1 9 10836 08 04 25 08 07 05 --- 15 06 35 33.9 220.1 2.2 28.9 120 F 1 11905 08 04 25 08 07 45 3C274 15 07 15 45.1 240.6 2.6 41.7 12 1 10 11905 08 07 05 08 22 43 --- 15 22 15 42.6 244.4 2.9 43.5 898 R 1 17042 08 07 05 08 23 22 3C279 15 22 54 31.9 224.3 2.4 31.6 12 1 10 17042 08 22 43 08 25 22 --- 15 24 54 31.6 224.8 2.5 31.9 120 R 1 15982 08 22 43 08 26 01 3C274 15 25 34 42.1 245.2 2.9 43.9 12 1 10 15982 08 25 22 08 40 58 --- 15 40 34 39.5 248.6 3.2 45.3 898 R 1 9739 08 25 22 08 41 37 3C279 15 41 13 29.4 228.7 2.7 34.3 13 1 10 9739 08 40 58 08 43 37 --- 15 43 13 29.1 229.2 2.8 34.6 120 R 1 8682 08 40 58 08 45 37 J1159+2914 15 45 13 43.3 273.3 3.8 58.5 84 1 10 8682 08 45 07 08 50 36 =1156+295 15 50 13 42.4 274.1 3.8 58.5 299 R 1 6487 08 45 20 08 51 13 J1310+3220 15 50 49 57.0 266.6 2.7 61.7 1 1 10 6487 08 50 36 08 56 12 =1308+326 15 55 49 56.1 267.5 2.8 61.8 299 R 1 4247 08 50 36 08 57 02 3C274 15 56 40 36.7 252.1 3.4 46.6 5 1 11 4247 08 56 32 09 11 59 --- 16 11 40 34.0 255.1 3.7 47.6 898 F 1 1936 08 56 45 09 12 42 3C279 16 12 22 24.8 235.8 3.3 38.3 18 1 11 1936 09 11 59 09 14 42 --- 16 14 22 24.5 236.2 3.3 38.5 120 F 1 3018 09 11 59 09 15 25 3C274 16 15 06 33.4 255.8 3.7 47.8 20 1 11 3018 09 14 42 09 30 23 --- 16 30 06 30.6 258.7 4.0 48.5 898 F 1 9291 09 14 42 09 31 07 3C279 16 30 50 21.9 239.6 3.6 40.3 21 1 11 9291 09 30 23 09 33 06 --- 16 32 50 21.6 240.0 3.6 40.5 120 F 1 10383 09 30 23 09 33 51 3C274 16 33 35 30.0 259.4 4.0 48.6 22 1 11 10383 09 33 06 09 48 49 --- 16 48 35 27.2 262.1 4.3 49.1 898 F 1 16664 09 33 06 09 49 32 3C279 16 49 19 18.9 243.3 3.9 42.1 21 1 12 16664 09 48 49 09 51 32 --- 16 51 19 18.5 243.7 3.9 42.2 120 R 1 17448 09 48 49 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 ---------------------------------------------------------------------------------------- --- Sat 8 Apr 2006 Day 98 --- 09 52 15 3C274 16 52 02 26.6 262.7 4.3 49.2 21 1 12 17448 09 51 32 10 07 12 --- 17 07 02 23.8 265.4 4.6 49.6 898 R 1 11176 09 51 32 10 07 52 3C279 17 07 42 15.8 246.8 4.2 43.6 17 1 12 11176 10 07 12 10 09 52 --- 17 09 42 15.4 247.2 4.2 43.7 120 R 1 10115 10 07 12 10 10 30 3C274 17 10 20 23.2 265.9 4.7 49.6 17 1 12 10115 10 09 52 10 25 28 --- 17 25 20 20.4 268.5 4.9 49.7 898 R 1 3875 10 09 52 10 26 04 3C279 17 25 56 12.6 250.2 4.5 44.9 14 1 12 3875 10 25 28 10 28 03 --- 17 27 56 12.2 250.5 4.5 45.0 120 R 1 2838 10 25 28 10 28 40 3C274 17 28 33 19.8 269.0 5.0 49.8 15 1 13 2838 10 28 03 10 43 37 --- 17 43 33 17.0 271.5 5.2 49.7 898 F 1 3390 10 28 03 10 44 14 3C279 17 44 09 9.4 253.4 4.8 45.9 15 1 13 3390 10 43 37 10 46 13 --- 17 46 09 9.0 253.8 4.8 46.0 120 F 1 4430 10 43 37 10 46 50 3C274 17 46 46 16.4 272.0 5.3 49.7 16 1 13 4430 10 46 13 11 01 48 --- 18 01 46 13.6 274.5 5.5 49.6 898 F 1 10658 10 46 13 11 02 23 3C279 18 02 21 6.1 256.6 5.1 46.8 14 1 13 10658 11 01 48 11 04 22 --- 18 04 21 5.7 256.9 5.1 46.9 120 F 1 11689 11 01 48 11 04 57 3C274 18 04 56 13.0 275.0 5.6 49.5 14 1 14 11689 11 04 22 11 19 55 --- 18 19 56 10.3 277.5 5.8 49.2 898 R 1 17295 11 04 22 11 20 27 3C279 18 20 29 2.8 259.6 5.4 47.5 12 1 14 17295 11 19 55 11 22 27 --- 18 22 29 2.4 260.0 5.4 47.6 120 R 1 16279 11 19 55 11 25 06 1726+455 18 25 08 79.0 294.6 1.0 104.6 0 1 14 16279 11 24 36 11 28 06 --- 18 28 08 78.5 293.9 1.0 103.5 180 R 1 14882 11 24 49 11 31 23 1751+288 18 31 27 75.0 213.4 0.6 27.9 138 1 14 14882 11 30 53 11 34 23 --- 18 34 27 74.6 215.6 0.7 29.7 180 R 1 13485 11 31 06 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 10.989287 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