COVER INFORMATION Station: HART (Code Hh ) Experiment: Snapshot Ionospheric Testing Observations Exp. Code: N05L4 Schedule Version: 1.11 Processed by SCHED version: 6.01 Release: Late March 2005 PI: James M Anderson Address: Joint Institute for VLBI in Europe Oude Hoogeveensedijk 4 7991 PD Dwingeloo The Netherlands Phone: +31 (0)521 596 542 EMAIL: anderson@jive.nl Fax: +31 (0)521 596 539 Phone during observation: +31 (0)521 596 500 Observing mode: Snapshot observations of sources at 18cm (128 Mb/s) Notes: ALBUS Ionospheric modeling test observations Phase referencing is too fast for JODRELL1 All targets are strong Schedule for HART (Code Hh ) Page 2 Snapshot Ionospheric Testing Observations 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. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Wed 8 Jun 2005 Day 159 --- Next scan frequencies: 1650.49 1650.49 1658.49 1658.49 Next BBC frequencies: 140.49 140.49 148.49 148.49 Next scan bandwidths: 8.00 8.00 8.00 8.00 04 00 00 J0204+1514 22 57 19 28.5 53.4 -3.1 0.0 0 1 1 0 04 00 00 04 08 00 =0202+149 23 05 20 30.0 51.9 -3.0 0.0 480 F 1 0 04 08 00 J0209+1352 23 05 20 30.0 53.9 -3.1 0.0 -29 1 1 0 04 08 00 04 09 40 =0206+136 23 07 00 30.3 53.6 -3.0 0.0 71 F 1 0 04 09 40 J0204+1514 23 07 00 30.3 51.6 -3.0 0.0 -29 1 1 0 04 09 40 04 11 20 =0202+149 23 08 40 30.5 51.2 -2.9 0.0 71 F 1 0 04 11 20 J0209+1352 23 08 40 30.6 53.3 -3.0 0.0 -29 1 1 0 04 11 20 04 13 00 =0206+136 23 10 21 30.9 53.0 -3.0 0.0 71 F 1 0 04 13 00 J0204+1514 23 10 21 30.8 50.9 -2.9 0.0 -29 1 1 0 04 13 00 04 14 40 =0202+149 23 12 01 31.1 50.6 -2.9 0.0 71 F 1 0 04 14 40 J0209+1352 23 12 01 31.2 52.7 -3.0 0.0 -29 1 1 0 04 14 40 04 16 20 =0206+136 23 13 41 31.5 52.4 -2.9 0.0 71 F 1 0 04 17 20 J0204+1514 23 14 41 31.6 50.1 -2.8 0.0 31 1 1 0 04 17 20 04 18 00 =0202+149 23 15 22 31.7 49.9 -2.8 0.0 40 F 1 0 04 18 00 J0203+1134 23 15 22 34.4 52.9 -2.8 0.0 -34 1 1 0 04 18 00 04 19 40 =0201+113 23 17 02 34.7 52.5 -2.8 0.0 66 F 1 0 04 19 40 J0204+1514 23 17 02 32.0 49.6 -2.8 0.0 -34 1 1 0 04 19 40 04 21 20 =0202+149 23 18 42 32.3 49.3 -2.8 0.0 66 F 1 0 04 21 20 J0203+1134 23 18 42 35.0 52.2 -2.8 0.0 -34 1 1 0 04 21 20 04 23 00 =0201+113 23 20 22 35.3 51.8 -2.7 0.0 66 F 1 0 04 23 00 J0204+1514 23 20 22 32.6 48.9 -2.7 0.0 -34 1 1 0 04 23 00 04 24 40 =0202+149 23 22 03 32.8 48.6 -2.7 0.0 66 F 1 0 04 24 40 J0203+1134 23 22 03 35.6 51.5 -2.7 0.0 -34 1 1 0 04 24 40 04 26 20 =0201+113 23 23 43 35.9 51.1 -2.7 0.0 66 F 1 0 04 26 20 J0204+1514 23 23 43 33.1 48.2 -2.7 0.0 -34 1 1 0 04 26 20 04 28 00 =0202+149 23 25 23 33.4 47.9 -2.7 0.0 66 F 1 0 Schedule for HART (Code Hh ) Page 3 Snapshot Ionospheric Testing Observations 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. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Wed 8 Jun 2005 Day 159 --- 04 28 00 J0225+1846 23 25 23 27.5 49.0 -3.0 0.0 -37 1 1 0 04 28 00 04 29 40 =0222+185 23 27 03 27.8 48.7 -3.0 0.0 63 F 1 0 04 29 40 J0204+1514 23 27 03 33.7 47.5 -2.6 0.0 -37 1 1 0 04 29 40 04 31 20 =0202+149 23 28 44 34.0 47.2 -2.6 0.0 63 F 1 0 04 31 20 J0225+1846 23 28 44 28.1 48.3 -2.9 0.0 -37 1 1 0 04 31 20 04 33 00 =0222+185 23 30 24 28.3 48.0 -2.9 0.0 63 F 1 0 04 33 00 J0204+1514 23 30 24 34.2 46.8 -2.6 0.0 -37 1 1 0 04 33 00 04 34 40 =0202+149 23 32 04 34.5 46.5 -2.6 0.0 63 F 1 0 04 34 40 J0225+1846 23 32 04 28.6 47.7 -2.9 0.0 -37 1 1 0 04 34 40 04 36 20 =0222+185 23 33 45 28.9 47.4 -2.9 0.0 63 F 1 0 04 36 20 J0204+1514 23 33 45 34.8 46.1 -2.5 0.0 -37 1 1 0 04 36 20 04 38 00 =0202+149 23 35 25 35.1 45.7 -2.5 0.0 63 F 1 0 05 23 40 J0401+2110 00 21 12 18.7 53.9 -3.7 0.0 2677 1 1 0 05 23 40 05 30 00 =0358+210 00 27 33 19.9 53.0 -3.6 0.0 380 F 1 0 05 30 00 J0357+2319 00 27 33 19.2 50.5 -3.5 0.0 -31 1 1 0 05 30 00 05 31 40 =0354+231 00 29 14 19.5 50.2 -3.5 0.0 69 F 1 0 05 31 40 J0401+2110 00 29 14 20.2 52.7 -3.5 0.0 -31 1 1 0 05 31 40 05 33 20 =0358+210 00 30 54 20.5 52.4 -3.5 0.0 69 F 1 0 05 33 20 J0357+2319 00 30 54 19.8 50.0 -3.4 0.0 -31 1 1 0 05 33 20 05 35 00 =0354+231 00 32 34 20.1 49.7 -3.4 0.0 69 F 1 0 05 35 00 J0401+2110 00 32 34 20.8 52.2 -3.5 0.0 -31 1 1 0 05 35 00 05 36 40 =0358+210 00 34 14 21.0 51.9 -3.5 0.0 69 F 1 0 05 36 40 J0357+2319 00 34 14 20.4 49.4 -3.4 0.0 -31 1 1 0 05 36 40 05 38 20 =0354+231 00 35 55 20.7 49.2 -3.4 0.0 69 F 1 0 05 38 20 J0401+2110 00 35 55 21.3 51.6 -3.4 0.0 -31 1 1 0 05 38 20 05 40 00 =0358+210 00 37 35 21.6 51.3 -3.4 0.0 69 F 1 0 05 40 00 J0412+2305 00 37 35 18.5 51.5 -3.6 0.0 -32 1 1 0 05 40 00 05 41 40 =0409+229 00 39 15 18.8 51.3 -3.6 0.0 68 F 1 0 05 41 40 J0401+2110 00 39 15 21.9 51.1 -3.4 0.0 -32 1 1 0 05 41 40 05 43 20 =0358+210 00 40 56 22.2 50.8 -3.4 0.0 68 F 1 0 Schedule for HART (Code Hh ) Page 4 Snapshot Ionospheric Testing Observations 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. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Wed 8 Jun 2005 Day 159 --- 05 43 20 J0412+2305 00 40 56 19.1 51.0 -3.5 0.0 -32 1 1 0 05 43 20 05 45 00 =0409+229 00 42 36 19.3 50.8 -3.5 0.0 68 F 1 0 05 45 00 J0401+2110 00 42 36 22.5 50.5 -3.3 0.0 -32 1 1 0 05 45 00 05 46 40 =0358+210 00 44 16 22.8 50.2 -3.3 0.0 68 F 1 0 05 46 40 J0412+2305 00 44 16 19.6 50.5 -3.5 0.0 -32 1 1 0 05 46 40 05 48 20 =0409+229 00 45 56 19.9 50.2 -3.5 0.0 68 F 1 0 05 49 20 J0401+2110 00 46 57 23.3 49.8 -3.3 0.0 27 1 1 0 05 49 20 05 50 00 =0358+210 00 47 37 23.4 49.6 -3.2 0.0 40 F 1 0 05 50 00 J0403+2600 00 47 37 19.8 46.1 -3.3 0.0 -37 1 1 0 05 50 00 05 51 40 =0400+258 00 49 17 20.1 45.8 -3.2 0.0 63 F 1 0 05 51 40 J0401+2110 00 49 17 23.7 49.4 -3.2 0.0 -37 1 1 0 05 51 40 05 53 20 =0358+210 00 50 57 23.9 49.1 -3.2 0.0 63 F 1 0 05 53 20 J0403+2600 00 50 57 20.4 45.5 -3.2 0.0 -37 1 1 0 05 53 20 05 55 00 =0400+258 00 52 37 20.7 45.3 -3.2 0.0 63 F 1 0 05 55 00 J0401+2110 00 52 37 24.2 48.8 -3.2 0.0 -37 1 1 0 05 55 00 05 56 40 =0358+210 00 54 18 24.5 48.5 -3.1 0.0 63 F 1 0 05 56 40 J0403+2600 00 54 18 20.9 45.0 -3.2 0.0 -37 1 1 0 05 56 40 05 58 20 =0400+258 00 55 58 21.2 44.7 -3.1 0.0 63 F 1 0 05 58 20 J0401+2110 00 55 58 24.8 48.2 -3.1 0.0 -37 1 1 0 05 58 20 06 00 00 =0358+210 00 57 38 25.1 47.9 -3.1 0.0 63 F 1 0 07 00 00 J0222-1615 01 57 48 78.8 31.7 -0.4 0.0 3493 1 1 0 07 00 00 07 04 00 =0219-164 02 01 49 79.2 27.2 -0.3 0.0 240 F 1 0 07 04 00 J0219-1842 02 01 49 81.7 30.6 -0.3 0.0 -32 1 1 0 07 04 00 07 05 40 =0217-189 02 03 29 81.9 28.1 -0.3 0.0 68 F 1 0 07 05 40 J0222-1615 02 03 29 79.4 25.3 -0.3 0.0 -32 1 1 0 07 05 40 07 07 20 =0219-164 02 05 09 79.6 23.2 -0.3 0.0 68 F 1 0 07 07 20 J0219-1842 02 05 09 82.1 25.6 -0.2 0.0 -32 1 1 0 07 07 20 07 09 00 =0217-189 02 06 50 82.2 22.9 -0.2 0.0 68 F 1 0 07 09 00 J0222-1615 02 06 50 79.7 21.2 -0.3 0.0 -32 1 1 0 07 09 00 07 10 40 =0219-164 02 08 30 79.8 19.0 -0.2 0.0 68 F 1 0 Schedule for HART (Code Hh ) Page 5 Snapshot Ionospheric Testing Observations 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. TPStart: Tape motion start time. Frequencies are LO sum (band edge). ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Wed 8 Jun 2005 Day 159 --- 07 10 40 J0219-1842 02 08 30 82.4 20.1 -0.2 0.0 -32 1 1 0 07 10 40 07 12 20 =0217-189 02 10 10 82.5 17.3 -0.2 0.0 68 F 1 0 07 12 20 J0222-1615 02 10 10 79.9 16.8 -0.2 0.0 -32 1 1 0 07 12 20 07 14 00 =0219-164 02 11 50 80.0 14.6 -0.2 0.0 68 F 1 0 07 14 00 J0204-1701 02 11 50 81.0 349.8 0.1 0.0 -36 1 1 0 07 14 00 07 15 40 =0202-172 02 13 31 80.9 347.3 0.1 0.0 64 F 1 0 07 15 40 J0222-1615 02 13 31 80.1 12.3 -0.1 0.0 -36 1 1 0 07 15 40 07 17 20 =0219-164 02 15 11 80.2 10.0 -0.1 0.0 64 F 1 0 07 17 20 J0204-1701 02 15 11 80.8 344.9 0.2 0.0 -36 1 1 0 07 17 20 07 19 00 =0202-172 02 16 51 80.7 342.5 0.2 0.0 64 F 1 0 07 19 00 J0222-1615 02 16 51 80.3 7.7 -0.1 0.0 -36 1 1 0 07 19 00 07 20 40 =0219-164 02 18 32 80.3 5.3 -0.1 0.0 64 F 1 0 07 20 40 J0204-1701 02 18 32 80.6 340.1 0.2 0.0 -36 1 1 0 07 20 40 07 24 40 =0202-172 02 22 32 80.2 334.8 0.3 0.0 204 F 1 0 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: eo999.18cm Matches group hh18cm in /aps3/sched/catalogs/freq.dat Values confirmed by E-mail Jonathan Quick 291100 (CR) Setup group: 11 Station: HART Total bit rate: 128 Format: MKIV1:4 Bits per sample: 2 Sample rate: 16.000 Number of channels: 4 Passes/head pos: 1 Speedup factor: 2.00 1st LO= 1510.00 1510.00 1510.00 1510.00 Net SB= U U U U Pol. = RCP LCP RCP LCP BBC = 2 1 4 3 BBC SB= U U U U IF = 2N 1N 2N 1N The following frequency sets based on this setup were used. Frequency Set: 11 Setup file default. No pcal detection. LO sum= 1650.49 1650.49 1658.49 1658.49 BBC fr= 140.49 140.49 148.49 148.49 Bandwd= 8.000 8.000 8.000 8.000 Track assignments are: track1= 2, 18, 3, 19 barrel=roll_off SOURCE LIST -- Snapshot Ionospheric Testing Observations 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) * J0019+7327 00 16 54.195137 * 00 19 45.786416 00 20 01.036268 0.71 0016+731 73 10 51.40705 * 73 27 30.01749 73 28 57.79489 0.40 J0019+73 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.511 scan hours, 16.420 baseline hours above horizon. * J0021+7150 00 18 11.765753 * 00 21 02.813754 00 21 18.253443 3.46 0018+715 71 33 42.62294 * 71 50 20.77090 71 51 48.68427 1.79 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.167 scan hours, 4.979 baseline hours above horizon. * J0030+7037 00 27 17.041380 * 00 30 14.412958 00 30 30.562022 0.79 0027+703 70 21 06.12163 * 70 37 40.06067 70 39 08.14676 0.50 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.139 scan hours, 3.677 baseline hours above horizon. * J0157+7442 01 53 04.337034 * 01 57 34.964898 01 57 59.010738 1.04 0153+744 74 28 05.62244 * 74 42 43.23008 74 44 04.81000 0.43 J0157+74 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.100 scan hours, 1.914 baseline hours above horizon. * J0203+1134 02 01 06.003327 * 02 03 46.657059 02 04 02.710479 0.31 0201+113 11 20 22.95411 * 11 34 45.40959 11 36 16.04629 0.20 J0203+11 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 2.847 baseline hours above horizon. * J0204+1514 02 02 07.396229 * 02 04 50.413897 02 05 06.672072 0.31 0202+149 14 59 50.93941 * 15 14 11.04363 15 15 40.58579 0.20 J0204+15 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.367 scan hours, 16.516 baseline hours above horizon. * J0204-1701 02 02 34.512048 * 02 04 57.674348 02 05 12.056220 0.22 0202-172 -17 15 39.48006 *-17 01 19.84062 -16 59 42.15825 0.33 J0204-17 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.122 scan hours, 3.935 baseline hours above horizon. * J0209+1352 02 06 53.563931 * 02 09 35.998316 02 09 52.191681 0.35 0206+136 13 37 51.51399 * 13 52 00.75155 13 53 29.66572 0.39 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 3.052 baseline hours above horizon. * J0219-1842 02 17 00.321364 * 02 19 21.161758 02 19 35.234036 0.27 0217-189 -18 56 24.31667 *-18 42 38.74756 -18 41 04.15099 0.50 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 2.346 baseline hours above horizon. * J0222-1615 02 19 38.282220 * 02 22 00.725026 02 22 14.950065 0.33 0219-164 -16 28 55.48832 *-16 15 16.54780 -16 13 43.22229 0.59 J0222-16 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.206 scan hours, 7.471 baseline hours above horizon. * J0225+1846 02 22 17.671419 * 02 25 04.668850 02 25 21.225774 0.57 0222+185 18 33 17.29028 * 18 46 48.76667 18 48 13.24364 0.93 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 2.532 baseline hours above horizon. * J0357+2319 03 54 23.255724 * 03 57 21.609882 03 57 39.072648 0.32 0354+231 23 11 17.27979 * 23 19 53.82567 23 20 50.69383 0.51 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 2.960 baseline hours above horizon. * J0401+2110 03 58 49.071431 * 04 01 45.166073 04 02 02.414563 0.24 0358+210 21 02 08.65451 * 21 10 28.58701 21 11 24.09403 0.43 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.339 scan hours, 14.880 baseline hours above horizon. * J0403+2600 04 00 03.594826 * 04 03 05.586056 04 03 23.385290 0.24 0400+258 25 51 46.48906 * 26 00 01.50293 26 00 56.13893 0.41 J0403+26 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 2.712 baseline hours above horizon. * J0412+2305 04 09 44.670142 * 04 12 43.666867 04 13 01.184225 0.23 0409+229 22 57 27.57585 * 23 05 05.45264 23 05 56.84624 0.41 J0412+23 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 2.868 baseline hours above horizon. * J2145+1115 21 42 52.346955 * 21 45 18.775083 21 45 34.739314 0.33 2142+110 11 01 36.29892 * 11 15 27.31241 11 16 46.10613 0.32 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 2.100 baseline hours above horizon. * J2147+0929 21 44 42.475270 * 21 47 10.162968 21 47 26.260700 0.31 2144+092 09 15 51.16785 * 09 29 46.67235 09 31 06.53999 0.23 J2147+09 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.111 scan hours, 2.143 baseline hours above horizon. * J2148+0657 21 45 36.078475 * 21 48 05.458673 21 48 21.746521 0.30 2145+067 06 43 40.90460 * 06 57 38.60420 06 58 59.53846 0.20 J2148+06 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.256 scan hours, 7.520 baseline hours above horizon. * J2151+0709 21 49 02.072554 * 21 51 31.429298 21 51 47.694124 0.37 2149+069 06 55 20.94040 * 07 09 26.78350 07 10 48.59884 0.39 J2151+07 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 2.025 baseline hours above horizon. * J2155+2250 21 52 47.298889 * 21 55 06.458500 21 55 21.528202 0.28 2152+226 22 36 08.01218 * 22 50 22.28132 22 51 40.18410 0.44 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.044 scan hours, 0.781 baseline hours above horizon. * J2212+2355 22 09 45.687917 * 22 12 05.966312 22 12 21.038512 0.22 2209+236 23 40 49.85187 * 23 55 40.54381 23 57 02.30005 0.40 J2212+23 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 1.881 baseline hours above horizon. * J2217+2421 22 14 40.244620 * 22 17 00.821177 22 17 15.889963 0.25 2214+241 24 06 45.63544 * 24 21 45.95794 24 23 08.70630 0.45 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.239 scan hours, 5.759 baseline hours above horizon. * J2225+2118 22 23 14.748371 * 22 25 38.047133 22 25 53.370563 0.24 2223+210 21 02 50.21498 * 21 18 06.41493 21 19 31.96853 0.42 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 1.631 baseline hours above horizon. * J2236+7322 22 35 24.325582 * 22 36 38.597013 22 36 45.529859 0.73 2235+731 73 07 17.31768 * 73 22 52.66229 73 24 09.76929 0.40 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.017 scan hours, 0.530 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) J0019+7327 62.9 J0021+7150 62.5 J0030+7037 61.5 J0157+7442 57.3 J0203+1134 44.7 J0204+1514 43.3 J0204-1701 59.5 J0209+1352 42.6 J0219-1842 58.1 J0222-1615 56.0 J0225+1846 37.6 J0357+2319 15.7 J0401+2110 14.9 J0403+2600 14.6 J0412+2305 12.2 J2145+1115 103.6 J2147+0929 104.0 J2148+0657 104.9 J2151+0709 104.0 J2155+2250 96.1 J2212+2355 92.2 J2217+2421 91.0 J2225+2118 90.5 J2236+7322 70.2 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