COVER INFORMATION Station: TORUN (Code Tr ) 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 TORUN (Code Tr ) 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: 662.01 662.01 654.01 654.01 646.01 646.01 638.01 638.01 Next scan bandwidths: 8.00 8.00 8.00 8.00 8.00 8.00 8.00 8.00 23 00 00 J1323+7942 17 16 04 57.5 -16.4 3.9 108.4 0 1 1 0 23 00 00 23 02 00 =1323+799 17 18 04 57.4 -16.5 3.9 107.9 120 F 1 0 23 02 00 J1139+7654 17 18 04 52.4 -21.7 5.6 78.2 -48 1 1 0 23 02 00 23 04 00 =1136+771 17 20 04 52.3 -21.7 5.7 77.7 72 F 1 0 23 04 00 J1323+7942 17 20 04 57.4 -16.5 3.9 107.4 -48 1 1 0 23 04 00 23 06 00 =1323+799 17 22 05 57.3 -16.6 4.0 106.8 72 F 1 0 23 06 00 J1139+7654 17 22 05 52.1 -21.6 5.7 77.3 -48 1 1 0 23 06 00 23 08 00 =1136+771 17 24 05 52.0 -21.6 5.7 76.8 72 F 1 0 23 08 00 J1323+7942 17 24 05 57.2 -16.6 4.0 106.3 -48 1 1 0 23 08 00 23 10 00 =1323+799 17 26 05 57.1 -16.7 4.0 105.8 72 F 1 0 23 10 00 J1139+7654 17 26 05 51.9 -21.5 5.8 76.4 -48 1 1 0 23 10 00 23 12 00 =1136+771 17 28 06 51.8 -21.5 5.8 75.9 72 F 1 0 23 13 00 J1323+7942 17 29 06 57.0 -16.7 4.1 105.0 12 1 1 0 23 13 00 23 14 00 =1323+799 17 30 06 56.9 -16.8 4.1 104.7 60 F 1 0 23 14 00 J1406+7828 17 30 06 59.2 -17.7 3.4 114.4 -38 1 1 0 23 14 00 23 15 40 =1406+787 17 31 46 59.2 -17.7 3.4 113.9 62 F 1 0 23 15 40 J1323+7942 17 31 46 56.9 -16.8 4.1 104.3 -38 1 1 0 23 15 40 23 17 20 =1323+799 17 33 26 56.8 -16.8 4.2 103.8 62 F 1 0 23 17 20 J1406+7828 17 33 26 59.1 -17.8 3.4 113.5 -38 1 1 0 23 17 20 23 19 00 =1406+787 17 35 07 59.0 -17.9 3.5 113.0 62 F 1 0 23 19 00 J1323+7942 17 35 07 56.7 -16.9 4.2 103.4 -38 1 1 0 23 19 00 23 20 40 =1323+799 17 36 47 56.6 -16.9 4.2 103.0 62 F 1 0 23 20 40 J1406+7828 17 36 47 58.9 -17.9 3.5 112.5 -38 1 1 0 23 20 40 23 22 20 =1406+787 17 38 27 58.9 -18.0 3.5 112.1 62 F 1 0 Schedule for TORUN (Code Tr ) 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 22 20 J1323+7942 17 38 27 56.6 -16.9 4.2 102.5 -38 1 1 0 23 22 20 23 24 00 =1323+799 17 40 08 56.5 -16.9 4.3 102.1 62 F 1 0 23 24 00 J1357+7643 17 40 08 58.9 -21.5 3.7 106.5 -39 1 1 0 23 24 00 23 25 40 =1357+769 17 41 48 58.8 -21.6 3.7 106.1 61 F 1 0 23 25 40 J1323+7942 17 41 48 56.4 -17.0 4.3 101.7 -39 1 1 0 23 25 40 23 27 20 =1323+799 17 43 28 56.3 -17.0 4.3 101.2 61 F 1 0 23 27 20 J1357+7643 17 43 28 58.7 -21.7 3.8 105.6 -39 1 1 0 23 27 20 23 29 00 =1357+769 17 45 08 58.6 -21.7 3.8 105.2 61 F 1 0 23 29 00 J1323+7942 17 45 08 56.3 -17.0 4.4 100.8 -39 1 1 0 23 29 00 23 30 40 =1323+799 17 46 49 56.2 -17.0 4.4 100.4 61 F 1 0 23 30 40 J1357+7643 17 46 49 58.5 -21.7 3.8 104.7 -39 1 1 0 23 30 40 23 32 20 =1357+769 17 48 29 58.5 -21.8 3.8 104.3 61 F 1 0 23 32 20 J1323+7942 17 48 29 56.1 -17.1 4.4 99.9 -39 1 1 0 23 32 20 23 34 00 =1323+799 17 50 09 56.0 -17.1 4.4 99.5 61 F 1 0 23 40 00 J1745+1720 17 56 10 54.2 184.2 0.2 2.6 -73 1 1 0 23 40 00 23 44 00 =1743+173 18 00 11 54.1 185.8 0.2 3.7 167 F 1 0 23 44 00 J1752+1734 18 00 11 54.4 182.9 0.1 1.8 -35 1 1 0 23 44 00 23 45 40 =1750+175 18 01 51 54.4 183.6 0.1 2.3 65 F 1 0 23 45 40 J1745+1720 18 01 51 54.1 186.5 0.3 4.1 -35 1 1 0 23 45 40 23 47 20 =1743+173 18 03 31 54.1 187.2 0.3 4.5 65 F 1 0 23 47 20 J1752+1734 18 03 31 54.4 184.3 0.2 2.7 -35 1 1 0 23 47 20 23 49 00 =1750+175 18 05 12 54.4 185.0 0.2 3.1 65 F 1 0 23 49 00 J1745+1720 18 05 12 54.0 187.9 0.3 4.9 -35 1 1 0 23 49 00 23 50 40 =1743+173 18 06 52 54.0 188.6 0.4 5.4 65 F 1 0 23 50 40 J1752+1734 18 06 52 54.4 185.7 0.2 3.6 -35 1 1 0 23 50 40 23 52 20 =1750+175 18 08 32 54.3 186.4 0.3 4.0 65 F 1 0 23 53 20 J1745+1720 18 09 32 53.9 189.6 0.4 6.0 24 1 1 0 23 53 20 23 54 00 =1743+173 18 10 13 53.9 189.9 0.4 6.2 40 F 1 0 23 54 00 J1756+1535 18 10 13 52.4 185.2 0.2 3.2 -39 1 1 0 23 54 00 23 55 40 --- 18 11 53 52.4 185.8 0.2 3.6 61 F 1 0 Schedule for TORUN (Code Tr ) 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) ---------------------------------------------------------------------------------------- --- Mon 6 Jun 2005 Day 157 --- 23 55 40 J1745+1720 18 11 53 53.9 190.6 0.4 6.6 -40 1 1 0 23 55 40 23 57 20 =1743+173 18 13 33 53.8 191.2 0.5 7.0 60 F 1 0 23 57 20 J1756+1535 18 13 33 52.4 186.5 0.3 4.0 -40 1 1 0 23 57 20 23 59 00 --- 18 15 13 52.3 187.1 0.3 4.4 60 F 1 0 --- Start: Mon 6 Jun 2005 Day 157 -- Stop: Tue 7 Jun 2005 Day 158 --- 23 59 00 J1745+1720 18 15 13 53.8 191.9 0.5 7.5 -40 1 1 0 23 59 00 00 00 40 =1743+173 18 16 54 53.7 192.6 0.5 7.9 60 F 1 0 00 00 40 J1756+1535 18 16 54 52.3 187.8 0.3 4.8 -40 1 1 0 00 00 40 00 02 20 --- 18 18 34 52.3 188.4 0.4 5.3 60 F 1 0 00 02 20 J1745+1720 18 18 34 53.7 193.3 0.5 8.3 -40 1 1 0 00 02 20 00 04 00 =1743+173 18 20 14 53.6 193.9 0.6 8.7 60 F 1 0 00 04 00 J1719+1745 18 20 14 52.7 204.3 1.0 15.1 -51 1 1 0 00 04 00 00 05 40 =1717+178 18 21 54 52.6 205.0 1.0 15.4 49 F 1 0 00 05 40 J1745+1720 18 21 54 53.5 194.6 0.6 9.1 -51 1 1 0 00 05 40 00 07 20 =1743+173 18 23 35 53.5 195.2 0.6 9.5 49 F 1 0 00 07 20 J1719+1745 18 23 35 52.5 205.6 1.1 15.8 -51 1 1 0 00 07 20 00 09 00 =1717+178 18 25 15 52.4 206.2 1.1 16.2 49 F 1 0 00 09 00 J1745+1720 18 25 15 53.4 195.9 0.7 9.9 -51 1 1 0 00 09 00 00 10 40 =1743+173 18 26 55 53.3 196.6 0.7 10.3 49 F 1 0 00 10 40 J1719+1745 18 26 55 52.3 206.8 1.1 16.5 -51 1 1 0 00 10 40 00 12 20 =1717+178 18 28 36 52.2 207.5 1.2 16.9 49 F 1 0 00 12 20 J1745+1720 18 28 36 53.3 197.2 0.7 10.7 -50 1 1 0 00 12 20 00 14 00 =1743+173 18 30 16 53.2 197.9 0.7 11.1 50 F 1 0 00 17 00 J2148+0657 18 33 16 29.3 121.1 -3.3 -31.2 -4 1 1 0 00 17 00 00 26 00 =2145+067 18 42 18 30.5 123.3 -3.1 -30.4 536 F 1 0 00 29 00 J2129-1538 18 45 18 12.8 139.6 -2.7 -23.8 85 1 1 0 00 29 00 00 30 00 =2126-158 18 46 18 12.9 139.8 -2.7 -23.7 60 F 1 0 00 30 00 J2129-1821 18 46 18 10.4 140.9 -2.7 -23.5 -38 1 1 0 00 30 00 00 31 40 =2126-185 18 47 59 10.5 141.2 -2.7 -23.3 62 F 1 0 Schedule for TORUN (Code Tr ) 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) ---------------------------------------------------------------------------------------- --- Tue 7 Jun 2005 Day 158 --- 00 31 40 J2129-1538 18 47 59 13.0 140.2 -2.7 -23.5 -38 1 1 0 00 31 40 00 33 20 =2126-158 18 49 39 13.2 140.6 -2.7 -23.3 62 F 1 0 00 33 20 J2129-1821 18 49 39 10.7 141.6 -2.7 -23.1 -38 1 1 0 00 33 20 00 35 00 =2126-185 18 51 19 10.8 142.0 -2.6 -22.9 62 F 1 0 00 35 00 J2129-1538 18 51 19 13.3 140.9 -2.6 -23.1 -38 1 1 0 00 35 00 00 36 40 =2126-158 18 53 00 13.5 141.3 -2.6 -22.9 62 F 1 0 00 36 40 J2129-1821 18 53 00 11.0 142.4 -2.6 -22.7 -38 1 1 0 00 36 40 00 38 20 =2126-185 18 54 40 11.1 142.7 -2.6 -22.5 62 F 1 0 00 38 20 J2129-1538 18 54 40 13.6 141.7 -2.6 -22.7 -38 1 1 0 00 38 20 00 40 00 =2126-158 18 56 20 13.8 142.1 -2.6 -22.5 62 F 1 0 00 40 00 J2130-0927 18 56 20 19.4 139.3 -2.6 -23.4 -50 1 1 0 00 40 00 00 41 40 =2127-096 18 58 00 19.6 139.7 -2.5 -23.2 50 F 1 0 00 41 40 J2129-1538 18 58 00 14.0 142.5 -2.5 -22.3 -50 1 1 0 00 41 40 00 43 20 =2126-158 18 59 41 14.1 142.8 -2.5 -22.1 50 F 1 0 00 43 20 J2130-0927 18 59 41 19.7 140.1 -2.5 -23.0 -50 1 1 0 00 43 20 00 45 00 =2127-096 19 01 21 19.9 140.5 -2.5 -22.8 50 F 1 0 00 45 00 J2129-1538 19 01 21 14.3 143.2 -2.5 -21.9 -50 1 1 0 00 45 00 00 46 40 =2126-158 19 03 01 14.4 143.6 -2.4 -21.7 50 F 1 0 00 46 40 J2130-0927 19 03 01 20.0 140.9 -2.5 -22.6 -50 1 1 0 00 46 40 00 48 20 =2127-096 19 04 41 20.2 141.3 -2.4 -22.4 50 F 1 0 00 49 20 J2129-1538 19 05 42 14.6 144.2 -2.4 -21.4 10 1 1 0 00 49 20 00 50 00 =2126-158 19 06 22 14.7 144.4 -2.4 -21.3 40 F 1 0 00 50 00 J2131-1207 19 06 22 17.8 142.5 -2.4 -22.0 -40 1 1 0 00 50 00 00 51 40 =2128-123 19 08 02 17.9 142.9 -2.4 -21.8 60 F 1 0 00 51 40 J2129-1538 19 08 02 14.8 144.8 -2.4 -21.1 -40 1 1 0 00 51 40 00 53 20 =2126-158 19 09 42 15.0 145.2 -2.3 -20.9 60 F 1 0 00 53 20 J2131-1207 19 09 42 18.1 143.3 -2.4 -21.5 -40 1 1 0 00 53 20 00 55 00 =2128-123 19 11 23 18.2 143.7 -2.3 -21.3 60 F 1 0 00 55 00 J2129-1538 19 11 23 15.1 145.6 -2.3 -20.6 -40 1 1 0 00 55 00 00 56 40 =2126-158 19 13 03 15.3 145.9 -2.3 -20.4 60 F 1 0 Schedule for TORUN (Code Tr ) Page 6 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 56 40 J2131-1207 19 13 03 18.4 144.1 -2.3 -21.1 -40 1 1 0 00 56 40 00 58 20 =2128-123 19 14 43 18.5 144.5 -2.3 -20.9 60 F 1 0 00 58 20 J2129-1538 19 14 43 15.4 146.3 -2.2 -20.2 -41 1 1 0 00 58 20 01 00 00 =2126-158 19 16 23 15.6 146.7 -2.2 -20.0 59 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 tr18cm in /aps3/sched/catalogs/freq.dat E-mail Borkowski 12Mar98, preferred alternative Setup group: 6 Station: TORUN 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= 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 2300.00 Net SB= U U U U U U U U Pol. = RCP LCP RCP LCP RCP LCP RCP LCP BBC = 1 2 3 4 5 6 7 8 BBC SB= L L L L L L L L IF = C A C A C A C A The following frequency sets based on this setup were used. Frequency Set: 6 Setup file default. Used pcal sets: 1 LO sum= 1637.99 1637.99 1645.99 1645.99 1653.99 1653.99 1661.99 1661.99 BBC fr= 662.01 662.01 654.01 654.01 646.01 646.01 638.01 638.01 Bandwd= 8.000 8.000 8.000 8.000 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 S5 S7 S1 S3 S5 S7 PCALXB2= S2 S4 S6 S8 S2 S4 S6 S8 PCALFR1= 10 10 10 10 6010 6010 6010 6010 PCALFR2= 10 10 10 10 6010 6010 6010 6010 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