COVER INFORMATION Station: ONSALA85 (Code On ) Experiment: e-VLBI clock-search run for RM001 Exp. Code: te055 Schedule Version: 2.00 Processed by SCHED version: 6.05 June 2006 PI: Zsolt Paragi Address: JIVE Postbus 2 7990 AA Dwingeloo The Netherlands Phone: +31 (0)521 596 536 EMAIL: zparagi@jive.nl Fax: Phone during observation: +31 (0)521 596 500 Observing mode: Notes: Schedule for ONSALA85 (Code On ) Page 2 e-VLBI clock-search run for RM001 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. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Tue 27 Mar 2007 Day 86 --- Next scan frequencies: 1636.49 1636.49 1636.49 1636.49 1652.49 1652.49 1652.49 1652.49 1668.49 1668.49 1668.49 1668.49 1684.49 1684.49 1684.49 1684.49 Next BBC frequencies: 136.49 136.49 136.49 136.49 152.49 152.49 152.49 152.49 168.49 168.49 168.49 168.49 184.49 184.49 184.49 184.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 09 00 00 3C454.3 22 05 21 47.8 162.4 -0.8 0.0 0 1 1 0 09 00 00 09 14 00 --- 22 19 23 48.3 167.3 -0.6 0.0 840 F 1 54 09 00 04 09 15 00 3C454.3 22 20 23 48.3 167.7 -0.6 0.0 57 1 1 54 09 15 00 09 29 00 --- 22 34 25 48.6 172.8 -0.3 0.0 840 F 1 108 09 15 04 09 30 00 3C454.3 22 35 25 48.6 173.1 -0.3 0.0 57 1 1 108 09 30 00 09 44 00 --- 22 49 28 48.8 178.2 -0.1 0.0 840 F 1 163 09 30 04 09 45 00 3C454.3 22 50 28 48.8 178.6 -0.1 0.0 57 1 1 163 09 45 00 09 59 00 --- 23 04 30 48.7 183.7 0.2 0.0 840 F 1 217 09 45 04 10 00 00 3C454.3 23 05 30 48.7 184.1 0.2 0.0 57 1 1 217 10 00 00 10 14 00 --- 23 19 33 48.5 189.2 0.4 0.0 840 F 1 271 10 00 04 10 15 00 3C454.3 23 20 33 48.5 189.5 0.4 0.0 57 1 1 271 10 15 00 10 29 00 --- 23 34 35 48.1 194.6 0.7 0.0 840 F 1 325 10 15 04 10 30 00 3C454.3 23 35 35 48.1 194.9 0.7 0.0 57 1 1 325 10 30 00 10 44 00 --- 23 49 38 47.5 199.9 0.9 0.0 840 F 1 379 10 30 04 10 45 00 3C454.3 23 50 38 47.5 200.2 0.9 0.0 57 1 1 379 10 45 00 10 59 00 --- 00 04 40 46.7 205.1 1.2 0.0 840 F 1 434 10 45 04 11 00 00 3C454.3 00 05 40 46.7 205.4 1.2 0.0 57 1 1 434 11 00 00 11 07 00 --- 00 12 41 46.2 207.8 1.3 0.0 420 F 1 461 11 00 04 11 07 00 J2253+1942 00 12 41 49.6 209.5 1.3 0.0 -13 1 1 461 11 07 00 11 14 00 =2250+194 00 19 43 49.1 211.9 1.4 0.0 407 F 1 488 11 07 04 11 15 00 3C454.3 00 20 43 45.7 210.4 1.4 0.0 47 1 1 488 11 15 00 11 22 00 --- 00 27 44 45.2 212.7 1.6 0.0 420 F 1 515 11 15 04 Schedule for ONSALA85 (Code On ) Page 3 e-VLBI clock-search run for RM001 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. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Tue 27 Mar 2007 Day 86 --- 11 22 00 J2253+1942 00 27 44 48.5 214.6 1.6 0.0 -13 1 1 515 11 22 00 11 29 00 =2250+194 00 34 45 48.0 217.0 1.7 0.0 407 F 1 542 11 22 04 11 30 00 3C454.3 00 35 45 44.6 215.3 1.7 0.0 47 1 1 542 11 30 00 11 37 00 --- 00 42 46 44.1 217.5 1.8 0.0 420 F 1 569 11 30 04 11 37 00 J2253+1942 00 42 46 47.3 219.6 1.8 0.0 -13 1 1 569 11 37 00 11 44 00 =2250+194 00 49 47 46.7 221.8 1.9 0.0 407 F 1 596 11 37 04 11 45 00 3C454.3 00 50 48 43.4 220.0 1.9 0.0 47 1 1 596 11 45 00 11 52 00 --- 00 57 49 42.8 222.2 2.1 0.0 420 F 1 623 11 45 04 11 52 00 J2253+1942 00 57 49 46.0 224.4 2.1 0.0 -13 1 1 623 11 52 00 11 59 00 =2250+194 01 04 50 45.3 226.5 2.2 0.0 407 F 1 650 11 52 04 12 00 00 3C454.3 01 05 50 42.0 224.6 2.2 0.0 47 1 1 650 12 00 00 12 07 00 --- 01 12 51 41.3 226.6 2.3 0.0 420 F 1 677 12 00 04 12 07 00 J2253+1942 01 12 51 44.5 228.9 2.3 0.0 -13 1 1 677 12 07 00 12 14 00 =2250+194 01 19 52 43.8 231.0 2.4 0.0 407 F 1 704 12 07 04 12 15 00 3C454.3 01 20 53 40.5 229.0 2.4 0.0 47 1 1 704 12 15 00 12 22 00 --- 01 27 54 39.8 231.0 2.6 0.0 420 F 1 732 12 15 04 12 22 00 J2253+1942 01 27 54 42.9 233.3 2.6 0.0 -13 1 1 732 12 22 00 12 29 00 =2250+194 01 34 55 42.1 235.3 2.7 0.0 407 F 1 759 12 22 04 12 30 00 3C454.3 01 35 55 39.0 233.2 2.7 0.0 47 1 1 759 12 30 00 12 37 00 --- 01 42 56 38.2 235.1 2.8 0.0 420 F 1 786 12 30 04 12 37 00 J2253+1942 01 42 56 41.2 237.5 2.8 0.0 -13 1 1 786 12 37 00 12 44 00 =2250+194 01 49 57 40.4 239.4 2.9 0.0 407 F 1 813 12 37 04 12 45 00 3C454.3 01 50 57 37.3 237.3 2.9 0.0 47 1 1 813 12 45 00 12 52 00 --- 01 57 59 36.5 239.1 3.1 0.0 420 F 1 840 12 45 04 12 52 00 J2253+1942 01 57 59 39.5 241.6 3.1 0.0 -13 1 1 840 12 52 00 12 59 00 =2250+194 02 05 00 38.7 243.4 3.2 0.0 407 F 1 867 12 52 04 13 00 00 3C454.3 02 06 00 35.6 241.2 3.2 0.0 47 1 1 867 13 00 00 13 07 00 --- 02 13 01 34.7 243.0 3.3 0.0 420 F 1 894 13 00 04 13 07 00 J2253+1942 02 13 01 37.7 245.5 3.3 0.0 -13 1 1 894 13 07 00 13 14 00 =2250+194 02 20 02 36.8 247.2 3.4 0.0 407 F 1 921 13 07 04 Schedule for ONSALA85 (Code On ) Page 4 e-VLBI clock-search run for RM001 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. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Tue 27 Mar 2007 Day 86 --- 13 15 00 3C454.3 02 21 02 33.8 245.0 3.4 0.0 47 1 1 921 13 15 00 13 22 00 --- 02 28 04 32.9 246.7 3.6 0.0 420 F 1 948 13 15 04 13 22 00 J2253+1942 02 28 04 35.8 249.2 3.6 0.0 -13 1 1 948 13 22 00 13 29 00 =2250+194 02 35 05 34.9 250.9 3.7 0.0 407 F 1 975 13 22 04 13 30 00 3C454.3 02 36 05 31.9 248.7 3.7 0.0 47 1 1 975 13 30 00 13 37 00 --- 02 43 06 31.0 250.4 3.8 0.0 420 F 1 1003 13 30 04 13 37 00 J2253+1942 02 43 06 33.9 252.8 3.8 0.0 -13 1 1 1003 13 37 00 13 44 00 =2250+194 02 50 07 33.0 254.5 3.9 0.0 407 F 1 1030 13 37 04 13 45 00 3C454.3 02 51 07 30.0 252.3 3.9 0.0 47 1 1 1030 13 45 00 13 52 00 --- 02 58 08 29.1 253.9 4.1 0.0 420 F 1 1057 13 45 04 13 52 00 J2253+1942 02 58 08 31.9 256.3 4.1 0.0 -13 1 1 1057 13 52 00 13 59 00 =2250+194 03 05 10 31.0 258.0 4.2 0.0 407 F 1 1084 13 52 04 14 05 00 3C84 03 11 11 74.1 173.8 -0.2 0.0 141 1 1 1084 14 05 00 14 14 00 --- 03 20 12 74.1 180.0 0.0 0.0 540 F 1 1119 14 05 04 14 15 00 3C84 03 21 12 74.1 180.6 0.0 0.0 57 1 1 1119 14 15 00 14 29 00 --- 03 35 15 74.0 190.2 0.2 0.0 840 F 1 1173 14 15 04 14 30 00 3C84 03 36 15 73.9 190.9 0.3 0.0 57 1 1 1173 14 30 00 14 44 00 --- 03 50 17 73.4 200.1 0.5 0.0 840 F 1 1227 14 30 04 14 45 00 3C84 03 51 17 73.4 200.7 0.5 0.0 57 1 1 1227 14 45 00 14 59 00 --- 04 05 20 72.6 209.3 0.8 0.0 840 F 1 1281 14 45 04 15 00 00 3C84 04 06 20 72.5 209.8 0.8 0.0 57 1 1 1281 15 00 00 15 14 00 --- 04 20 22 71.5 217.6 1.0 0.0 840 F 1 1335 15 00 04 15 15 00 3C84 04 21 22 71.4 218.2 1.0 0.0 57 1 1 1335 15 15 00 15 29 00 --- 04 35 24 70.1 225.2 1.3 0.0 840 F 1 1390 15 15 04 15 30 00 3C84 04 36 25 70.0 225.6 1.3 0.0 57 1 1 1390 15 30 00 15 44 00 --- 04 50 27 68.6 231.9 1.5 0.0 840 F 1 1444 15 30 04 15 45 00 3C84 04 51 27 68.5 232.3 1.5 0.0 57 1 1 1444 15 45 00 15 59 00 --- 05 05 29 67.0 237.9 1.8 0.0 840 F 1 1498 15 45 04 16 00 00 3C84 05 06 30 66.8 238.3 1.8 0.0 57 1 1 1498 16 00 00 16 14 00 --- 05 20 32 65.2 243.3 2.0 0.0 840 F 1 1552 16 00 04 Schedule for ONSALA85 (Code On ) Page 5 e-VLBI clock-search run for RM001 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. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Tue 27 Mar 2007 Day 86 --- 16 15 00 3C84 05 21 32 65.1 243.7 2.0 0.0 57 1 1 1552 16 15 00 16 29 00 --- 05 35 34 63.3 248.2 2.3 0.0 840 F 1 1606 16 15 04 16 30 00 3C84 05 36 34 63.2 248.5 2.3 0.0 57 1 1 1606 16 30 00 16 44 00 --- 05 50 37 61.4 252.7 2.5 0.0 840 F 1 1661 16 30 04 16 45 00 3C84 05 51 37 61.3 253.0 2.5 0.0 57 1 1 1661 16 45 00 16 59 00 --- 06 05 39 59.5 256.8 2.8 0.0 840 F 1 1715 16 45 04 17 00 00 3C84 06 06 39 59.3 257.1 2.8 0.0 57 1 1 1715 17 00 00 17 14 00 --- 06 20 42 57.5 260.6 3.0 0.0 840 F 1 1769 17 00 04 17 15 00 3C84 06 21 42 57.4 260.9 3.0 0.0 57 1 1 1769 17 15 00 17 29 00 --- 06 35 44 55.5 264.2 3.3 0.0 840 F 1 1823 17 15 04 17 30 00 3C84 06 36 44 55.3 264.4 3.3 0.0 57 1 1 1823 17 30 00 17 44 00 --- 06 50 47 53.5 267.6 3.5 0.0 840 F 1 1877 17 30 04 17 45 00 3C84 06 51 47 53.3 267.8 3.5 0.0 57 1 1 1877 17 45 00 17 59 00 --- 07 05 49 51.4 270.8 3.8 0.0 840 F 1 1931 17 45 04 18 00 00 3C84 07 06 49 51.3 271.0 3.8 0.0 57 1 1 1931 18 00 00 18 14 00 --- 07 20 52 49.4 273.8 4.0 0.0 840 F 1 1986 18 00 04 18 15 00 3C84 07 21 52 49.3 274.0 4.0 0.0 57 1 1 1986 18 15 00 18 29 00 --- 07 35 54 47.4 276.8 4.3 0.0 840 F 1 2040 18 15 04 18 30 00 3C84 07 36 54 47.3 277.0 4.3 0.0 57 1 1 2040 18 30 00 18 44 00 --- 07 50 56 45.4 279.7 4.5 0.0 840 F 1 2094 18 30 04 18 45 00 3C84 07 51 57 45.3 279.8 4.5 0.0 57 1 1 2094 18 45 00 18 59 00 --- 08 05 59 43.4 282.4 4.8 0.0 840 F 1 2148 18 45 04 19 00 00 3C84 08 06 59 43.3 282.6 4.8 0.0 57 1 1 2148 19 00 00 19 14 00 --- 08 21 01 41.4 285.2 5.0 0.0 840 F 1 2202 19 00 04 ---------- Dummy Scan ---------- 19 15 00 3C84 08 22 02 41.3 285.3 5.0 0.0 57 1 1 2202 19 15 00 19 16 00 --- 08 23 02 41.2 285.5 5.0 0.0 60 F 1 2206 19 15 04 Schedule for ONSALA85 (Code On ) Page 6 e-VLBI clock-search run for RM001 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. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) SYNC ---------------------------------------------------------------------------------------- --- Tue 27 Mar 2007 Day 86 --- ---------- Dummy Scan ---------- Next scan frequencies: 1636.49 1636.49 1636.49 1636.49 1652.49 1652.49 1652.49 1652.49 Next BBC frequencies: 136.49 136.49 136.49 136.49 152.49 152.49 152.49 152.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 19 17 00 3C84 08 24 02 41.0 285.7 5.1 0.0 57 1 1 2206 19 17 00 19 18 00 --- 08 25 02 40.9 285.9 5.1 0.0 60 F 1 2208 19 17 28 ---------- Dummy Scan ---------- Next scan frequencies: 1636.49 1636.49 1636.49 1636.49 Next BBC frequencies: 136.49 136.49 136.49 136.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 19 19 00 3C84 08 26 02 40.8 286.1 5.1 0.0 57 1 1 2208 19 19 00 19 20 00 --- 08 27 02 40.7 286.2 5.1 0.0 60 F 1 2209 19 19 28 ---------- Dummy Scan ---------- Next scan frequencies: 1636.49 1636.49 Next BBC frequencies: 136.49 136.49 Next scan bandwidths: 8.00 8.00 19 21 00 3C84 08 28 03 40.5 286.4 5.1 0.0 57 1 1 2209 19 21 00 19 22 00 --- 08 29 03 40.4 286.6 5.1 0.0 60 F 1 2210 19 21 28 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: L-512Mbps Matches group on21cm1 in /aps3/sched/catalogs/freq.dat Values from E-mail J.Conway (CR 21Oct02) Setup group: 22 Station: ONSALA85 Total bit rate: 512 Format: MKIV1:2 Bits per sample: 2 Sample rate: 16.000 Number of channels: 16 Speedup factor: 1.00 Disk used to record data. 1st LO= 1500.00 1500.00 1500.00 1500.00 1500.00 1500.00 1500.00 1500.00 1500.00 1500.00 1500.00 1500.00 1500.00 1500.00 1500.00 1500.00 Net SB= L L U U L L U U L L U U L L U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP RCP LCP BBC = 2 1 2 1 4 3 4 3 6 5 6 5 8 7 8 7 BBC SB= L L U U L L U U L L U U L L U U IF = 2N 1N 2N 1N 2N 1N 2N 1N 2N 1N 2N 1N 2N 1N 2N 1N The following frequency sets based on this setup were used. Frequency Set: 4 Setup file default. No pcal detection. LO sum= 1636.49 1636.49 1636.49 1636.49 1652.49 1652.49 1652.49 1652.49 1668.49 1668.49 1668.49 1668.49 1684.49 1684.49 1684.49 1684.49 BBC fr= 136.49 136.49 136.49 136.49 152.49 152.49 152.49 152.49 168.49 168.49 168.49 168.49 184.49 184.49 184.49 184.49 Bandwd= 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 Track assignments are: track1= 2, 10, 18, 26, 3, 11, 19, 27, 66, 74, 82, 90, 67, 75, 83, 91 barrel=roll_off Setup file: L-256Mbps Matches group on21cm1 in /aps3/sched/catalogs/freq.dat Values from E-mail J.Conway (CR 21Oct02) Setup group: 16 Station: ONSALA85 Total bit rate: 256 Format: MKIV1:2 Bits per sample: 2 Sample rate: 16.000 Number of channels: 8 Speedup factor: 1.00 Disk used to record data. 1st LO= 1500.00 1500.00 1500.00 1500.00 1500.00 1500.00 1500.00 1500.00 Net SB= L L U U L L U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 2 1 2 1 4 3 4 3 BBC SB= L L U U L L U U IF = 2N 1N 2N 1N 2N 1N 2N 1N The following frequency sets based on this setup were used. Frequency Set: 10 Setup file default. No pcal detection. LO sum= 1636.49 1636.49 1636.49 1636.49 1652.49 1652.49 1652.49 1652.49 BBC fr= 136.49 136.49 136.49 136.49 152.49 152.49 152.49 152.49 Bandwd= 8.000 8.000 8.000 8.000 8.000 8.000 8.000 8.000 Track assignments are: track1= 2, 10, 18, 26, 3, 11, 19, 27 barrel=roll_off Setup file: L-128Mbps Matches group on21cm1 in /aps3/sched/catalogs/freq.dat Values from E-mail J.Conway (CR 21Oct02) Setup group: 10 Station: ONSALA85 Total bit rate: 128 Format: MKIV1:2 Bits per sample: 2 Sample rate: 16.000 Number of channels: 4 Speedup factor: 1.00 Disk used to record data. 1st LO= 1500.00 1500.00 1500.00 1500.00 Net SB= L L U U Pol. = RCP LCP RCP LCP BBC = 2 1 2 1 BBC SB= L L U U IF = 2N 1N 2N 1N The following frequency sets based on this setup were used. Frequency Set: 16 Setup file default. No pcal detection. LO sum= 1636.49 1636.49 1636.49 1636.49 BBC fr= 136.49 136.49 136.49 136.49 Bandwd= 8.000 8.000 8.000 8.000 Track assignments are: track1= 2, 10, 18, 26 barrel=roll_off Setup file: L-64Mbps Matches group on21cm1 in /aps3/sched/catalogs/freq.dat Values from E-mail J.Conway (CR 21Oct02) Setup group: 4 Station: ONSALA85 Total bit rate: 64 Format: MKIV1:2 Bits per sample: 2 Sample rate: 16.000 Number of channels: 2 Speedup factor: 1.00 Disk used to record data. 1st LO= 1500.00 1500.00 Net SB= L L Pol. = RCP LCP BBC = 2 1 BBC SB= L L IF = 2N 1N The following frequency sets based on this setup were used. Frequency Set: 22 Setup file default. No pcal detection. LO sum= 1636.49 1636.49 BBC fr= 136.49 136.49 Bandwd= 8.000 8.000 Track assignments are: track1= 2, 10 barrel=roll_off SOURCE LIST -- e-VLBI clock-search run for RM001 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) J0319+4130 03 16 29.567289 * 03 19 48.160119 03 20 15.757423 0.28 0316+413 41 19 51.91677 * 41 30 42.10389 41 32 26.17837 0.41 * 3C84 /aps3/sched/catalogs/sources.vlba J0319+41 VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 4.883 scan hours, 73.245 baseline hours above horizon. J2253+1608 22 51 29.519744 * 22 53 57.747943 22 54 18.075073 0.31 2251+158 15 52 54.34806 * 16 08 53.56089 16 11 01.87278 0.20 * 3C454.3 /aps3/sched/catalogs/sources.vlba J2253+16 VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 3.267 scan hours, 49.000 baseline hours above horizon. * J2253+1942 22 50 40.548727 * 22 53 07.369174 22 53 27.430136 0.32 2250+194 19 26 36.48778 * 19 42 34.62878 19 44 42.46633 0.21 /aps3/sched/catalogs/sources.vlba VLBA Calib Survey - GSFC sols. - created L.Petrov 2005f_astro 1.400 scan hours, 19.640 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) 3C84 55.4 3C454.3 25.9 J2253+1942 28.0 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