COVER INFORMATION Station: JODRELL2 (Code Jb ) 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 JODRELL2 (Code Jb ) 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: 126.49 126.49 126.49 126.49 142.49 142.49 142.49 142.49 158.49 158.49 158.49 158.49 174.49 174.49 174.49 174.49 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 21 08 27 47.6 140.7 -1.8 -23.3 0 1 1 0 09 00 00 09 14 00 --- 21 22 30 48.8 145.3 -1.5 -20.8 840 F 1 54 09 00 04 09 15 00 3C454.3 21 23 30 48.9 145.7 -1.5 -20.6 52 1 1 54 09 15 00 09 29 00 --- 21 37 32 50.0 150.6 -1.3 -17.8 840 F 1 108 09 15 04 09 30 00 3C454.3 21 38 32 50.1 150.9 -1.3 -17.6 52 1 1 108 09 30 00 09 44 00 --- 21 52 35 51.0 156.0 -1.0 -14.7 840 F 1 163 09 30 04 09 45 00 3C454.3 21 53 35 51.1 156.4 -1.0 -14.4 51 1 1 163 09 45 00 09 59 00 --- 22 07 37 51.8 161.7 -0.8 -11.3 840 F 1 217 09 45 04 10 00 00 3C454.3 22 08 37 51.9 162.1 -0.8 -11.1 51 1 1 217 10 00 00 10 14 00 --- 22 22 39 52.4 167.5 -0.5 -7.8 840 F 1 271 10 00 04 10 15 00 3C454.3 22 23 40 52.5 167.9 -0.5 -7.5 51 1 1 271 10 15 00 10 29 00 --- 22 37 42 52.8 173.4 -0.3 -4.1 840 F 1 325 10 15 04 10 30 00 3C454.3 22 38 42 52.8 173.8 -0.3 -3.9 51 1 1 325 10 30 00 10 44 00 --- 22 52 44 52.9 179.4 0.0 -0.4 840 F 1 379 10 30 04 10 45 00 3C454.3 22 53 45 52.9 179.8 0.0 -0.1 51 1 1 379 10 45 00 10 59 00 --- 23 07 47 52.9 185.4 0.2 3.3 840 F 1 434 10 45 04 11 00 00 3C454.3 23 08 47 52.8 185.8 0.2 3.6 51 1 1 434 11 00 00 11 07 00 --- 23 15 48 52.7 188.5 0.4 5.3 420 F 1 461 11 00 04 11 07 00 J2253+1942 23 15 48 56.2 189.5 0.4 6.0 -27 1 1 461 11 07 00 11 14 00 =2250+194 23 22 49 56.0 192.4 0.5 7.9 393 F 1 488 11 07 04 11 15 00 3C454.3 23 23 50 52.5 191.7 0.5 7.3 33 1 1 488 11 15 00 11 22 00 --- 23 30 51 52.3 194.4 0.6 8.9 420 F 1 515 11 15 04 Schedule for JODRELL2 (Code Jb ) 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 23 30 51 55.7 195.8 0.6 9.9 -27 1 1 515 11 22 00 11 29 00 =2250+194 23 37 52 55.4 198.6 0.7 11.7 393 F 1 542 11 22 04 11 30 00 3C454.3 23 38 52 51.9 197.5 0.7 10.8 33 1 1 542 11 30 00 11 37 00 --- 23 45 53 51.6 200.2 0.9 12.4 420 F 1 569 11 30 04 11 37 00 J2253+1942 23 45 53 55.0 201.9 0.9 13.7 -27 1 1 569 11 37 00 11 44 00 =2250+194 23 52 54 54.6 204.6 1.0 15.4 393 F 1 596 11 37 04 11 45 00 3C454.3 23 53 54 51.1 203.2 1.0 14.2 33 1 1 596 11 45 00 11 52 00 --- 00 00 56 50.7 205.8 1.1 15.7 420 F 1 623 11 45 04 11 52 00 J2253+1942 00 00 56 54.1 207.7 1.1 17.2 -27 1 1 623 11 52 00 11 59 00 =2250+194 00 07 57 53.6 210.4 1.2 18.8 393 F 1 650 11 52 04 12 00 00 3C454.3 00 08 57 50.2 208.7 1.2 17.4 33 1 1 650 12 00 00 12 07 00 --- 00 15 58 49.6 211.2 1.4 18.8 420 F 1 677 12 00 04 12 07 00 J2253+1942 00 15 58 52.9 213.4 1.4 20.5 -26 1 1 677 12 07 00 12 14 00 =2250+194 00 22 59 52.3 215.9 1.5 21.9 394 F 1 704 12 07 04 12 15 00 3C454.3 00 23 59 49.0 213.9 1.5 20.4 33 1 1 704 12 15 00 12 22 00 --- 00 31 01 48.4 216.3 1.6 21.7 420 F 1 732 12 15 04 12 22 00 J2253+1942 00 31 01 51.6 218.7 1.6 23.4 -26 1 1 732 12 22 00 12 29 00 =2250+194 00 38 02 50.9 221.1 1.7 24.7 394 F 1 759 12 22 04 12 30 00 3C454.3 00 39 02 47.7 219.0 1.7 23.1 34 1 1 759 12 30 00 12 37 00 --- 00 46 03 47.0 221.3 1.9 24.3 420 F 1 786 12 30 04 12 37 00 J2253+1942 00 46 03 50.1 223.8 1.9 26.1 -26 1 1 786 12 37 00 12 44 00 =2250+194 00 53 04 49.4 226.1 2.0 27.3 394 F 1 813 12 37 04 12 45 00 3C454.3 00 54 04 46.2 223.8 2.0 25.6 34 1 1 813 12 45 00 12 52 00 --- 01 01 05 45.4 226.0 2.1 26.6 420 F 1 840 12 45 04 12 52 00 J2253+1942 01 01 05 48.5 228.6 2.1 28.5 -26 1 1 840 12 52 00 12 59 00 =2250+194 01 08 07 47.7 230.8 2.2 29.5 394 F 1 867 12 52 04 13 00 00 3C454.3 01 09 07 44.5 228.4 2.2 27.8 34 1 1 867 13 00 00 13 07 00 --- 01 16 08 43.7 230.5 2.4 28.7 420 F 1 894 13 00 04 13 07 00 J2253+1942 01 16 08 46.7 233.2 2.4 30.6 -25 1 1 894 13 07 00 13 14 00 =2250+194 01 23 09 45.9 235.3 2.5 31.5 395 F 1 921 13 07 04 Schedule for JODRELL2 (Code Jb ) 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 01 24 09 42.8 232.8 2.5 29.8 34 1 1 921 13 15 00 13 22 00 --- 01 31 10 42.0 234.7 2.6 30.6 420 F 1 948 13 15 04 13 22 00 J2253+1942 01 31 10 44.9 237.5 2.6 32.5 -25 1 1 948 13 22 00 13 29 00 =2250+194 01 38 12 44.0 239.5 2.7 33.2 395 F 1 975 13 22 04 13 30 00 3C454.3 01 39 12 41.0 236.9 2.7 31.5 35 1 1 975 13 30 00 13 37 00 --- 01 46 13 40.1 238.8 2.9 32.2 420 F 1 1003 13 30 04 13 37 00 J2253+1942 01 46 13 43.0 241.7 2.9 34.0 -25 1 1 1003 13 37 00 13 44 00 =2250+194 01 53 14 42.0 243.5 3.0 34.7 395 F 1 1030 13 37 04 13 45 00 3C454.3 01 54 14 39.0 240.9 3.0 33.0 35 1 1 1030 13 45 00 13 52 00 --- 02 01 15 38.1 242.7 3.1 33.6 420 F 1 1057 13 45 04 13 52 00 J2253+1942 02 01 15 40.9 245.6 3.1 35.4 -25 1 1 1057 13 52 00 13 59 00 =2250+194 02 08 16 40.0 247.3 3.2 35.9 395 F 1 1084 13 52 04 14 05 00 3C84 02 14 17 73.9 130.0 -1.1 -37.8 -4 1 1 1084 14 05 00 14 14 00 --- 02 23 19 74.9 135.0 -0.9 -34.4 536 F 1 1119 14 05 04 14 15 00 3C84 02 24 19 75.0 135.6 -0.9 -34.0 50 1 1 1119 14 15 00 14 29 00 --- 02 38 21 76.4 144.8 -0.7 -27.5 840 F 1 1173 14 15 04 14 30 00 3C84 02 39 22 76.4 145.5 -0.7 -27.0 49 1 1 1173 14 30 00 14 44 00 --- 02 53 24 77.5 156.2 -0.4 -18.8 840 F 1 1227 14 30 04 14 45 00 3C84 02 54 24 77.5 157.0 -0.4 -18.2 48 1 1 1227 14 45 00 14 59 00 --- 03 08 26 78.1 169.2 -0.2 -8.6 840 F 1 1281 14 45 04 15 00 00 3C84 03 09 26 78.2 170.1 -0.2 -7.9 48 1 1 1281 15 00 00 15 14 00 --- 03 23 29 78.3 183.0 0.1 2.4 840 F 1 1335 15 00 04 15 15 00 3C84 03 24 29 78.3 183.9 0.1 3.1 48 1 1 1335 15 15 00 15 29 00 --- 03 38 31 77.9 196.5 0.3 13.1 840 F 1 1390 15 15 04 15 30 00 3C84 03 39 31 77.9 197.4 0.3 13.8 48 1 1 1390 15 30 00 15 44 00 --- 03 53 34 77.0 208.9 0.6 22.7 840 F 1 1444 15 30 04 15 45 00 3C84 03 54 34 77.0 209.7 0.6 23.3 48 1 1 1444 15 45 00 15 59 00 --- 04 08 36 75.8 219.6 0.8 30.7 840 F 1 1498 15 45 04 16 00 00 3C84 04 09 36 75.7 220.3 0.8 31.1 49 1 1 1498 16 00 00 16 14 00 --- 04 23 39 74.2 228.6 1.1 36.9 840 F 1 1552 16 00 04 Schedule for JODRELL2 (Code Jb ) 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 04 24 39 74.1 229.2 1.1 37.2 50 1 1 1552 16 15 00 16 29 00 --- 04 38 41 72.4 236.2 1.3 41.7 840 F 1 1606 16 15 04 16 30 00 3C84 04 39 41 72.3 236.7 1.3 41.9 51 1 1 1606 16 30 00 16 44 00 --- 04 53 44 70.5 242.7 1.6 45.3 840 F 1 1661 16 30 04 16 45 00 3C84 04 54 44 70.3 243.0 1.6 45.5 51 1 1 1661 16 45 00 16 59 00 --- 05 08 46 68.4 248.2 1.8 47.9 840 F 1 1715 16 45 04 17 00 00 3C84 05 09 46 68.3 248.5 1.8 48.1 52 1 1 1715 17 00 00 17 14 00 --- 05 23 48 66.3 253.0 2.1 49.9 840 F 1 1769 17 00 04 17 15 00 3C84 05 24 49 66.2 253.3 2.1 50.0 52 1 1 1769 17 15 00 17 29 00 --- 05 38 51 64.1 257.2 2.3 51.3 840 F 1 1823 17 15 04 17 30 00 3C84 05 39 51 64.0 257.5 2.3 51.3 52 1 1 1823 17 30 00 17 44 00 --- 05 53 53 61.9 261.1 2.6 52.2 840 F 1 1877 17 30 04 17 45 00 3C84 05 54 54 61.8 261.3 2.6 52.2 53 1 1 1877 17 45 00 17 59 00 --- 06 08 56 59.7 264.6 2.8 52.8 840 F 1 1931 17 45 04 18 00 00 3C84 06 09 56 59.5 264.8 2.8 52.8 53 1 1 1931 18 00 00 18 14 00 --- 06 23 58 57.4 267.9 3.1 53.0 840 F 1 1986 18 00 04 18 15 00 3C84 06 24 58 57.3 268.1 3.1 53.1 53 1 1 1986 18 15 00 18 29 00 --- 06 39 01 55.2 270.9 3.3 53.1 840 F 1 2040 18 15 04 18 30 00 3C84 06 40 01 55.0 271.1 3.3 53.1 53 1 1 2040 18 30 00 18 44 00 --- 06 54 03 52.9 273.8 3.6 52.9 840 F 1 2094 18 30 04 18 45 00 3C84 06 55 03 52.8 274.0 3.6 52.9 53 1 1 2094 18 45 00 18 59 00 --- 07 09 06 50.7 276.5 3.8 52.6 840 F 1 2148 18 45 04 19 00 00 3C84 07 10 06 50.6 276.7 3.8 52.6 53 1 1 2148 19 00 00 19 14 00 --- 07 24 08 48.5 279.2 4.1 52.1 840 F 1 2202 19 00 04 ---------- Dummy Scan ---------- 19 15 00 3C84 07 25 08 48.3 279.4 4.1 52.1 53 1 1 2202 19 15 00 19 16 00 --- 07 26 09 48.2 279.5 4.1 52.1 60 F 1 2206 19 15 04 Schedule for JODRELL2 (Code Jb ) 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: 126.49 126.49 126.49 126.49 142.49 142.49 142.49 142.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 19 17 00 3C84 07 27 09 48.0 279.7 4.1 52.0 53 1 1 2206 19 17 00 19 18 00 --- 07 28 09 47.9 279.9 4.1 52.0 60 F 1 2208 19 17 28 ---------- Dummy Scan ---------- Next scan frequencies: 1636.49 1636.49 1636.49 1636.49 Next BBC frequencies: 126.49 126.49 126.49 126.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 19 19 00 3C84 07 29 09 47.7 280.1 4.1 51.9 53 1 1 2208 19 19 00 19 20 00 --- 07 30 09 47.6 280.2 4.2 51.9 60 F 1 2209 19 19 28 ---------- Dummy Scan ---------- Next scan frequencies: 1636.49 1636.49 Next BBC frequencies: 126.49 126.49 Next scan bandwidths: 8.00 8.00 19 21 00 3C84 07 31 09 47.4 280.4 4.2 51.9 53 1 1 2209 19 21 00 19 22 00 --- 07 32 10 47.3 280.6 4.2 51.8 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 j2b18cm in /aps3/sched/catalogs/freq.dat LO from Parry 23Jan97, assuming ident to JB1 Setup group: 21 Station: JODRELL2 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= 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 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: 3 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= 126.49 126.49 126.49 126.49 142.49 142.49 142.49 142.49 158.49 158.49 158.49 158.49 174.49 174.49 174.49 174.49 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 j2b18cm in /aps3/sched/catalogs/freq.dat LO from Parry 23Jan97, assuming ident to JB1 Setup group: 15 Station: JODRELL2 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= 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 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: 9 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= 126.49 126.49 126.49 126.49 142.49 142.49 142.49 142.49 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 j2b18cm in /aps3/sched/catalogs/freq.dat LO from Parry 23Jan97, assuming ident to JB1 Setup group: 9 Station: JODRELL2 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= 1510.00 1510.00 1510.00 1510.00 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: 15 Setup file default. No pcal detection. LO sum= 1636.49 1636.49 1636.49 1636.49 BBC fr= 126.49 126.49 126.49 126.49 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 j2b18cm in /aps3/sched/catalogs/freq.dat LO from Parry 23Jan97, assuming ident to JB1 Setup group: 3 Station: JODRELL2 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= 1510.00 1510.00 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: 21 Setup file default. No pcal detection. LO sum= 1636.49 1636.49 BBC fr= 126.49 126.49 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