COVER INFORMATION Station: JODRELL1 (Code Jb ) Experiment: Snapshot Ionospheric Testing Observations Exp. Code: N05L3 Schedule Version: 1.02 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 (256 Mb/s) Notes: ALBUS Ionospheric modeling test observations Phase referencing is too fast for JODRELL1 All targets are strong Schedule for JODRELL1 (Code Jb ) 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) ---------------------------------------------------------------------------------------- --- Mon 6 Jun 2005 Day 157 --- Next scan frequencies: 1637.99 1637.99 1645.99 1645.99 1653.99 1653.99 1661.99 1661.99 Next BBC frequencies: 127.99 127.99 135.99 135.99 143.99 143.99 151.99 151.99 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 23 00 00 J1323+7942 15 52 34 60.9 -12.8 2.5 132.1 0 1 1 0 23 00 00 23 02 00 =1323+799 15 54 35 60.8 -12.9 2.5 131.5 120 F 1 0 23 04 00 J1323+7942 15 56 35 60.7 -13.1 2.5 130.9 106 1 1 0 23 04 00 23 06 00 =1323+799 15 58 35 60.7 -13.2 2.6 130.3 120 F 1 0 23 08 00 J1323+7942 16 00 36 60.6 -13.3 2.6 129.7 106 1 1 0 23 08 00 23 10 00 =1323+799 16 02 36 60.5 -13.4 2.6 129.1 120 F 1 0 23 10 00 J1139+7654 16 02 36 56.8 -22.1 4.4 96.2 -54 1 1 0 23 10 00 23 12 00 =1136+771 16 04 36 56.6 -22.2 4.4 95.7 66 F 1 0 23 13 00 J1323+7942 16 05 36 60.4 -13.6 2.7 128.2 6 1 1 0 23 13 00 23 14 00 =1323+799 16 06 37 60.4 -13.6 2.7 127.9 60 F 1 0 23 15 40 J1323+7942 16 08 17 60.3 -13.7 2.7 127.4 86 1 1 0 23 15 40 23 17 20 =1323+799 16 09 57 60.3 -13.8 2.8 126.9 100 F 1 0 23 19 00 J1323+7942 16 11 37 60.2 -13.9 2.8 126.4 86 1 1 0 23 19 00 23 20 40 =1323+799 16 13 18 60.2 -14.0 2.8 125.9 100 F 1 0 23 20 40 J1406+7828 16 13 18 62.5 -13.2 2.1 137.2 -31 1 1 0 23 20 40 23 22 20 =1406+787 16 14 58 62.4 -13.3 2.1 136.6 69 F 1 0 23 22 20 J1323+7942 16 14 58 60.1 -14.1 2.8 125.4 -31 1 1 0 23 22 20 23 24 00 =1323+799 16 16 38 60.0 -14.2 2.9 125.0 69 F 1 0 23 25 40 J1323+7942 16 18 18 60.0 -14.3 2.9 124.5 86 1 1 0 23 25 40 23 27 20 =1323+799 16 19 59 59.9 -14.4 2.9 124.0 100 F 1 0 23 29 00 J1323+7942 16 21 39 59.8 -14.4 3.0 123.5 86 1 1 0 23 29 00 23 30 40 =1323+799 16 23 19 59.8 -14.5 3.0 123.0 100 F 1 0 23 30 40 J1357+7643 16 23 19 62.9 -17.4 2.4 128.8 -36 1 1 0 23 30 40 23 32 20 =1357+769 16 25 00 62.9 -17.6 2.4 128.3 64 F 1 0 Schedule for JODRELL1 (Code Jb ) 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) ---------------------------------------------------------------------------------------- --- Mon 6 Jun 2005 Day 157 --- 23 32 20 J1323+7942 16 25 00 59.7 -14.6 3.0 122.5 -36 1 1 0 23 32 20 23 34 00 =1323+799 16 26 40 59.7 -14.7 3.0 122.1 64 F 1 0 23 40 00 J1745+1720 16 32 41 51.4 151.3 -1.2 -17.5 -324 1 1 0 23 40 00 23 44 00 =1743+173 16 36 41 51.6 152.8 -1.2 -16.7 -84 F 1 0 23 45 40 J1745+1720 16 38 22 51.8 153.4 -1.1 -16.3 80 1 1 0 23 45 40 23 47 20 =1743+173 16 40 02 51.9 154.0 -1.1 -15.9 100 F 1 0 23 49 00 J1745+1720 16 41 42 52.0 154.7 -1.1 -15.6 80 1 1 0 23 49 00 23 50 40 =1743+173 16 43 23 52.1 155.3 -1.0 -15.2 100 F 1 0 23 50 40 J1752+1734 16 43 23 51.8 152.5 -1.2 -16.8 -31 1 1 0 23 50 40 23 52 20 =1750+175 16 45 03 52.0 153.1 -1.1 -16.5 69 F 1 0 23 53 20 J1745+1720 16 46 03 52.2 156.3 -1.0 -14.6 28 1 1 0 23 53 20 23 54 00 =1743+173 16 46 43 52.3 156.5 -1.0 -14.5 40 F 1 0 23 55 40 J1745+1720 16 48 23 52.4 157.2 -1.0 -14.1 80 1 1 0 23 55 40 23 57 20 =1743+173 16 50 04 52.5 157.8 -0.9 -13.7 100 F 1 0 --- Start: Mon 6 Jun 2005 Day 157 -- Stop: Tue 7 Jun 2005 Day 158 --- 23 59 00 J1745+1720 16 51 44 52.6 158.4 -0.9 -13.3 80 1 1 0 23 59 00 00 00 40 =1743+173 16 53 24 52.7 159.1 -0.9 -12.9 100 F 1 0 00 00 40 J1756+1535 16 53 24 50.3 155.5 -1.1 -14.9 -34 1 1 0 00 00 40 00 02 20 --- 16 55 04 50.4 156.1 -1.0 -14.6 66 F 1 0 00 02 20 J1745+1720 16 55 04 52.7 159.7 -0.8 -12.5 -34 1 1 0 00 02 20 00 04 00 =1743+173 16 56 45 52.8 160.4 -0.8 -12.2 66 F 1 0 00 05 40 J1745+1720 16 58 25 52.9 161.0 -0.8 -11.8 80 1 1 0 00 05 40 00 07 20 =1743+173 17 00 05 53.0 161.7 -0.8 -11.4 100 F 1 0 00 09 00 J1745+1720 17 01 46 53.1 162.3 -0.7 -11.0 80 1 1 0 00 09 00 00 10 40 =1743+173 17 03 26 53.1 163.0 -0.7 -10.6 100 F 1 0 00 10 40 J1719+1745 17 03 26 54.4 173.4 -0.3 -4.1 -61 1 1 0 00 10 40 00 12 20 =1717+178 17 05 06 54.4 174.1 -0.2 -3.7 39 F 1 0 00 12 20 J1745+1720 17 05 06 53.2 163.6 -0.7 -10.2 -62 1 1 0 00 12 20 00 14 00 =1743+173 17 06 46 53.3 164.3 -0.7 -9.8 38 F 1 0 Schedule for JODRELL1 (Code Jb ) 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) ---------------------------------------------------------------------------------------- --- Tue 7 Jun 2005 Day 158 --- 00 17 00 J2148+0657 17 09 47 17.7 102.4 -4.6 -36.1 -87 1 1 0 00 17 00 00 26 00 =2145+067 17 18 48 19.0 104.3 -4.5 -35.8 453 F 1 0 00 29 00 J2129-1538 17 21 49 3.2 121.7 -4.1 -31.9 68 1 1 0 00 29 00 00 30 00 =2126-158 17 22 49 3.3 121.9 -4.1 -31.9 60 F 1 0 00 31 40 J2129-1538 17 24 29 3.5 122.2 -4.1 -31.7 83 1 1 0 00 31 40 00 33 20 =2126-158 17 26 10 3.7 122.6 -4.1 -31.6 100 F 1 0 00 35 00 J2129-1538 17 27 50 3.9 122.9 -4.0 -31.4 83 1 1 0 00 35 00 00 36 40 =2126-158 17 29 30 4.2 123.3 -4.0 -31.3 100 F 1 0 00 38 20 J2129-1538 17 31 10 4.4 123.6 -4.0 -31.2 83 1 1 0 00 38 20 00 40 00 =2126-158 17 32 51 4.6 123.9 -3.9 -31.0 100 F 1 0 00 41 40 J2129-1538 17 34 31 4.8 124.3 -3.9 -30.9 83 1 1 0 00 41 40 00 43 20 =2126-158 17 36 11 5.0 124.6 -3.9 -30.8 100 F 1 0 00 45 00 J2129-1538 17 37 51 5.2 125.0 -3.9 -30.6 83 1 1 0 00 45 00 00 46 40 =2126-158 17 39 32 5.4 125.3 -3.8 -30.5 100 F 1 0 00 46 40 J2130-0927 17 39 32 10.6 121.9 -3.9 -31.0 -48 1 1 0 00 46 40 00 48 20 =2127-096 17 41 12 10.8 122.3 -3.8 -30.9 52 F 1 0 00 49 20 J2129-1538 17 42 12 5.7 125.9 -3.8 -30.2 12 1 1 0 00 49 20 00 50 00 =2126-158 17 42 52 5.8 126.0 -3.8 -30.2 40 F 1 0 00 51 40 J2129-1538 17 44 33 6.0 126.4 -3.7 -30.0 83 1 1 0 00 51 40 00 53 20 =2126-158 17 46 13 6.2 126.7 -3.7 -29.9 100 F 1 0 00 55 00 J2129-1538 17 47 53 6.4 127.1 -3.7 -29.7 83 1 1 0 00 55 00 00 56 40 =2126-158 17 49 33 6.6 127.4 -3.7 -29.6 100 F 1 0 00 56 40 J2131-1207 17 49 33 9.4 125.2 -3.7 -30.0 -34 1 1 0 00 56 40 00 58 20 =2128-123 17 51 14 9.6 125.5 -3.7 -29.9 66 F 1 0 00 58 20 J2129-1538 17 51 14 6.8 127.8 -3.6 -29.4 -34 1 1 0 00 58 20 01 00 00 =2126-158 17 52 54 7.0 128.1 -3.6 -29.3 66 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 j1b18cm in /aps3/sched/catalogs/freq.dat LO from Parry 23Jan97, must be using Low patch Setup group: 1 Station: JODRELL1 Total bit rate: 256 Format: MKIV1:2 Bits per sample: 2 Sample rate: 16.000 Number of channels: 8 Passes/head pos: 1 Speedup factor: 1.00 1st LO= 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 1510.00 Net SB= U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 2 1 4 3 6 5 8 7 BBC SB= U U U U U U U U IF = 2N 1N 2N 1N 2N 1N 2N 1N The following frequency sets based on this setup were used. Frequency Set: 1 Setup file default. No pcal detection. LO sum= 1637.99 1637.99 1645.99 1645.99 1653.99 1653.99 1661.99 1661.99 BBC fr= 127.99 127.99 135.99 135.99 143.99 143.99 151.99 151.99 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 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) * J1139+7654 11 36 50.402483 * 11 39 51.538717 11 40 13.600280 1.47 1136+771 77 11 09.68453 * 76 54 32.34642 76 53 06.06924 0.65 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.100 scan hours, 1.894 baseline hours above horizon. * J1323+7942 13 23 30.967861 * 13 23 51.569831 13 24 00.836917 2.82 1323+799 79 58 27.57995 * 79 42 51.84705 79 41 25.76771 0.44 J1323+79 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.283 scan hours, 8.751 baseline hours above horizon. * J1357+7643 13 57 42.117003 * 13 57 55.371534 13 58 02.806741 0.87 1357+769 76 57 53.35424 * 76 43 21.05104 76 41 58.55255 0.40 J1357+76 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 2.185 baseline hours above horizon. * J1406+7828 14 06 56.652670 * 14 06 36.566944 14 06 41.585608 3.71 1406+787 78 42 22.78156 * 78 28 10.40623 78 26 49.33489 0.63 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 2.161 baseline hours above horizon. * J1719+1745 17 17 00.324732 * 17 19 13.048481 17 19 28.559864 0.32 1717+178 17 48 08.51599 * 17 45 06.43721 17 44 37.64380 0.22 J1719+17 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 1.739 baseline hours above horizon. * J1745+1720 17 43 22.235899 * 17 45 35.208167 17 45 50.704699 0.32 1743+173 17 21 09.18647 * 17 20 01.42378 17 19 43.97628 0.22 J1745+17 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.300 scan hours, 8.450 baseline hours above horizon. * J1752+1734 17 50 33.364387 * 17 52 46.002901 17 53 01.452521 0.39 1750+175 17 34 56.75224 * 17 34 20.35018 17 34 06.02002 0.56 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 2.350 baseline hours above horizon. * J1756+1535 17 54 37.953509 * 17 56 53.102132 17 57 08.795390 0.32 15 35 39.32316 * 15 35 20.82657 15 35 08.41956 0.24 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 2.232 baseline hours above horizon. * J2129-1538 21 26 26.777538 * 21 29 12.175905 21 29 30.394943 0.21 2126-158 -15 51 50.34727 *-15 38 41.04110 -15 37 18.72623 0.30 J2129-15 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.250 scan hours, 9.451 baseline hours above horizon. * J2129-1821 21 26 33.897232 * 21 29 21.419113 21 29 39.890466 0.27 2126-185 -18 34 32.47350 *-18 21 22.79035 -18 19 59.57129 0.49 J2129-18 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 2.231 baseline hours above horizon. * J2130-0927 21 27 38.408364 * 21 30 19.088248 21 30 36.744372 0.23 2127-096 -09 40 49.81991 *-09 27 37.43511 -09 26 16.73888 0.37 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 2.505 baseline hours above horizon. * J2131-1207 21 28 52.676063 * 21 31 35.261755 21 31 53.136782 0.21 2128-123 -12 20 20.53564 *-12 07 04.79603 -12 05 42.84703 0.30 J2131-12 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.083 scan hours, 2.844 baseline hours above horizon. * J2148+0657 21 45 36.078475 * 21 48 05.458673 21 48 21.701858 0.30 2145+067 06 43 40.90460 * 06 57 38.60420 06 58 59.23842 0.20 J2148+06 /aps3/sched/catalogs/sources.vlba VLBA Calib Srcs - GSFC sols. - catalog 2004f_astro 0.150 scan hours, 7.749 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) J1139+7654 70.1 J1323+7942 73.5 J1357+7643 76.8 J1406+7828 75.8 J1719+1745 139.3 J1745+1720 138.4 J1752+1734 137.7 J1756+1535 139.3 J2129-1538 116.6 J2129-1821 117.4 J2130-0927 114.3 J2131-1207 115.0 J2148+0657 103.7 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