COVER INFORMATION Station: VLBA_FD (Code Fd ) Experiment: VLBA "M5-Modes" Test / 16-Track Modes Exp. Code: TM015E Schedule Version: 1.00 Processed by SCHED version: Trial release of 30 July 2004 PI: Jonathan Romney Address: National Radio Astronomy Observatory Post Office Box O Socorro NM 87801-0387 Phone: 505-835-7360 EMAIL: jromney@nrao.edu Fax: 505-835-7027 Phone during observation: 505-835-7360 Observing mode: Test Notes: Schedule for VLBA_FD (Code Fd ) Page 2 VLBA "M5-Modes" Test / 16-Track Modes 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). Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Wed 25 Aug 2004 Day 238 --- Next scan frequencies: 8400.99 8400.99 8432.99 8432.99 Next BBC frequencies: 800.99 800.99 832.99 832.99 Next scan bandwidths: 16.00 16.00 16.00 16.00 12 20 00 3C84 03 40 38 78.4 -19.4 0.3 157.6 0 1 1 0 12 20 00 12 22 00 --- 03 42 38 78.2 -21.1 0.4 155.6 120 F 1 1600 Next scan frequencies: 8416.99 8416.99 Next BBC frequencies: 816.99 816.99 Next scan bandwidths: 16.00 16.00 12 22 00 3C84 03 42 38 78.2 -21.1 0.4 155.6 -4 1 1 1600 12 22 00 12 24 00 --- 03 44 39 78.0 -22.7 0.4 153.7 116 F 1 3200 Next scan frequencies: 8408.99 8408.99 8424.99 8424.99 Next BBC frequencies: 808.99 808.99 824.99 824.99 Next scan bandwidths: 8.00 8.00 8.00 8.00 12 24 00 3C84 03 44 39 78.0 -22.7 0.4 153.7 -4 1 1 3200 12 24 00 12 28 00 --- 03 48 39 77.7 -25.9 0.5 149.9 236 F 1 4800 Next scan frequencies: 8416.99 8416.99 Next BBC frequencies: 816.99 816.99 Next scan bandwidths: 8.00 8.00 12 28 00 3C84 03 48 39 77.7 -25.9 0.5 149.9 -4 1 1 4800 12 28 00 12 32 00 --- 03 52 40 77.3 -28.8 0.5 146.4 236 F 1 6400 Schedule for VLBA_FD (Code Fd ) Page 3 VLBA "M5-Modes" Test / 16-Track Modes 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). Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Wed 25 Aug 2004 Day 238 --- Next scan frequencies: 8409.99 8409.99 8411.99 8411.99 8413.99 8413.99 8415.99 8415.99 8417.99 8417.99 8419.99 8419.99 8421.99 8421.99 8423.99 8423.99 Next BBC frequencies: 809.99 809.99 811.99 811.99 813.99 813.99 815.99 815.99 817.99 817.99 819.99 819.99 821.99 821.99 823.99 823.99 Next scan bandwidths: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 12 32 00 3C84 03 52 40 77.3 -28.8 0.5 146.4 -4 1 1 6400 12 32 00 12 40 00 --- 04 00 41 76.4 -34.1 0.7 139.9 476 F 1 8000 Next scan frequencies: 8413.99 8413.99 8415.99 8415.99 8417.99 8417.99 8419.99 8419.99 Next BBC frequencies: 813.99 813.99 815.99 815.99 817.99 817.99 819.99 819.99 Next scan bandwidths: 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 12 40 00 3C84 04 00 41 76.4 -34.1 0.7 139.9 -4 1 1 8000 12 40 00 12 48 00 --- 04 08 43 75.4 -38.6 0.8 134.2 476 F 1 9600 Next scan frequencies: 8410.99 8410.99 8414.99 8414.99 8418.99 8418.99 8422.99 8422.99 Next BBC frequencies: 810.99 810.99 814.99 814.99 818.99 818.99 822.99 822.99 Next scan bandwidths: 2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00 12 48 00 3C84 04 08 43 75.4 -38.6 0.8 134.2 -4 1 1 9600 12 48 00 12 56 00 --- 04 16 44 74.2 -42.4 0.9 129.2 476 F 1 11200 Next scan frequencies: 8414.99 8414.99 8418.99 8418.99 Next BBC frequencies: 814.99 814.99 818.99 818.99 Next scan bandwidths: 2.00 2.00 2.00 2.00 12 56 00 3C84 04 16 44 74.2 -42.4 0.9 129.2 -4 1 1 11200 12 56 00 13 04 00 --- 04 24 45 73.0 -45.6 1.1 124.8 476 F 1 12800 Schedule for VLBA_FD (Code Fd ) Page 4 VLBA "M5-Modes" Test / 16-Track Modes 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). Automatic tape allocation specified. Tape positions are just estimates. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Wed 25 Aug 2004 Day 238 --- Next scan frequencies: 8412.99 8412.99 8420.99 8420.99 Next BBC frequencies: 812.99 812.99 820.99 820.99 Next scan bandwidths: 4.00 4.00 4.00 4.00 13 04 00 3C84 04 24 45 73.0 -45.6 1.1 124.8 -4 1 1 12800 13 04 00 13 12 00 --- 04 32 47 71.8 -48.3 1.2 120.9 476 F 1 14400 Next scan frequencies: 8416.99 8416.99 Next BBC frequencies: 816.99 816.99 Next scan bandwidths: 4.00 4.00 13 12 00 3C84 04 32 47 71.8 -48.3 1.2 120.9 -4 1 1 14400 13 12 00 13 20 00 --- 04 40 48 70.5 -50.6 1.3 117.4 476 F 1 16000 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: amt-128-4-1.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 1 Station: VLBA Total bit rate: 128 Format: VLBA1:4 Bits per sample: 1 Sample rate: 32.000 Number of channels: 4 Passes/head pos: 2 Speedup factor: 1.00 Tape speeds: Low density - 266.660 ips, High density - 160.00 ips Time per pass for 16800 ft, High density tapes is: 00:21:00 1st LO= 7600.00 7600.00 7600.00 7600.00 Net SB= L U L U Pol. = LCP LCP LCP LCP BBC = 1 1 2 2 BBC SB= L U L U IF = D D D D VLBA FE= omit 4cm omit 4cm VLBA Synth= 7.6 15.4 15.4 The following frequency sets based on this setup were used. Frequency Set: 1 Setup file default. Used pcal sets: 1 LO sum= 8400.99 8400.99 8432.99 8432.99 BBC fr= 800.99 800.99 832.99 832.99 Bandwd= 16.000 16.000 16.000 16.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = OFF PCALXB1= S1 S3 OFF OFF OFF OFF OFF OFF PCALXB2= S2 S4 OFF OFF OFF OFF OFF OFF PCALFR1= 0 0 0 0 0 0 0 0 PCALFR2= 0 0 0 0 0 0 0 0 Track assignments are: track1= 2, 10, 18, 26 track2= 3, 11, 19, 27 barrel=roll_auto Setup file: amt-128-2-2.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 2 Station: VLBA Total bit rate: 128 Format: VLBA1:4 Bits per sample: 2 Sample rate: 32.000 Number of channels: 2 Passes/head pos: 2 Speedup factor: 1.00 Tape speeds: Low density - 266.660 ips, High density - 160.00 ips Time per pass for 16800 ft, High density tapes is: 00:21:00 1st LO= 7600.00 7600.00 Net SB= L U Pol. = LCP LCP BBC = 1 1 BBC SB= L U IF = D D VLBA FE= omit 4cm omit 4cm VLBA Synth= 7.6 15.4 15.4 The following frequency sets based on this setup were used. Frequency Set: 2 Setup file default. Used pcal sets: 2 LO sum= 8416.99 8416.99 BBC fr= 816.99 816.99 Bandwd= 16.000 16.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 2 PCAL = OFF PCALXB1= S1 S2 OFF OFF OFF OFF OFF OFF PCALXB2= M1 M2 OFF OFF OFF OFF OFF OFF PCALFR1= 0 0 0 0 0 0 0 0 PCALFR2= 0 0 0 0 0 0 0 0 Track assignments are: track1= 2, 18 track2= 3, 19 barrel=roll_auto Setup file: amt-64-4-1.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 3 Station: VLBA Total bit rate: 64 Format: VLBA1:4 Bits per sample: 1 Sample rate: 16.000 Number of channels: 4 Passes/head pos: 2 Speedup factor: 2.00 Tape speeds: Low density - 133.330 ips, High density - 80.00 ips Time per pass for 16800 ft, High density tapes is: 00:42:00 1st LO= 7600.00 7600.00 7600.00 7600.00 Net SB= L U L U Pol. = LCP LCP LCP LCP BBC = 1 1 2 2 BBC SB= L U L U IF = D D D D VLBA FE= omit 4cm omit 4cm VLBA Synth= 7.6 15.4 15.4 The following frequency sets based on this setup were used. Frequency Set: 3 Setup file default. Used pcal sets: 1 LO sum= 8408.99 8408.99 8424.99 8424.99 BBC fr= 808.99 808.99 824.99 824.99 Bandwd= 8.000 8.000 8.000 8.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = OFF PCALXB1= S1 S3 OFF OFF OFF OFF OFF OFF PCALXB2= S2 S4 OFF OFF OFF OFF OFF OFF PCALFR1= 0 0 0 0 0 0 0 0 PCALFR2= 0 0 0 0 0 0 0 0 Track assignments are: track1= 2, 10, 18, 26 track2= 3, 11, 19, 27 barrel=roll_auto Setup file: amt-64-2-2.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 4 Station: VLBA Total bit rate: 64 Format: VLBA1:4 Bits per sample: 2 Sample rate: 16.000 Number of channels: 2 Passes/head pos: 2 Speedup factor: 2.00 Tape speeds: Low density - 133.330 ips, High density - 80.00 ips Time per pass for 16800 ft, High density tapes is: 00:42:00 1st LO= 7600.00 7600.00 Net SB= L U Pol. = LCP LCP BBC = 1 1 BBC SB= L U IF = D D VLBA FE= omit 4cm omit 4cm VLBA Synth= 7.6 15.4 15.4 The following frequency sets based on this setup were used. Frequency Set: 4 Setup file default. Used pcal sets: 2 LO sum= 8416.99 8416.99 BBC fr= 816.99 816.99 Bandwd= 8.000 8.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 2 PCAL = OFF PCALXB1= S1 S2 OFF OFF OFF OFF OFF OFF PCALXB2= M1 M2 OFF OFF OFF OFF OFF OFF PCALFR1= 0 0 0 0 0 0 0 0 PCALFR2= 0 0 0 0 0 0 0 0 Track assignments are: track1= 2, 18 track2= 3, 19 barrel=roll_auto Setup file: amt-32-16-1.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 5 Station: VLBA Total bit rate: 32 Format: VLBA1:1 Bits per sample: 1 Sample rate: 2.000 Number of channels: 16 Passes/head pos: 2 Speedup factor: 4.00 Tape speeds: Low density - 66.665 ips, High density - 40.00 ips Time per pass for 16800 ft, High density tapes is: 01:24:00 1st LO= 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 Net SB= L U L U L U L U L U L U L U L U Pol. = LCP LCP LCP LCP LCP LCP LCP LCP LCP LCP LCP LCP LCP LCP LCP LCP BBC = 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 BBC SB= L U L U L U L U L U L U L U L U IF = D D D D D D D D D D D D D D D D VLBA FE= omit 4cm omit 4cm VLBA Synth= 7.6 15.4 15.4 The following frequency sets based on this setup were used. Frequency Set: 5 Setup file default. Used pcal sets: 3 LO sum= 8409.99 8409.99 8411.99 8411.99 8413.99 8413.99 8415.99 8415.99 8417.99 8417.99 8419.99 8419.99 8421.99 8421.99 8423.99 8423.99 BBC fr= 809.99 809.99 811.99 811.99 813.99 813.99 815.99 815.99 817.99 817.99 819.99 819.99 821.99 821.99 823.99 823.99 Bandwd= 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 3 PCAL = OFF PCALXB1= S1 S3 S5 S7 S9 S11 S13 S15 PCALXB2= S2 S4 S6 S8 S10 S12 S14 S16 PCALFR1= 0 0 0 0 0 0 0 0 PCALFR2= 0 0 0 0 0 0 0 0 Track assignments are: track1= 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 track2= 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33 barrel=roll_auto Setup file: amt-32-8-2.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 6 Station: VLBA Total bit rate: 32 Format: VLBA1:1 Bits per sample: 2 Sample rate: 2.000 Number of channels: 8 Passes/head pos: 2 Speedup factor: 4.00 Tape speeds: Low density - 66.665 ips, High density - 40.00 ips Time per pass for 16800 ft, High density tapes is: 01:24:00 1st LO= 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 Net SB= L U L U L U L U Pol. = LCP LCP LCP LCP LCP LCP LCP LCP BBC = 1 1 2 2 3 3 4 4 BBC SB= L U L U L U L U IF = D D D D D D D D VLBA FE= omit 4cm omit 4cm VLBA Synth= 7.6 15.4 15.4 The following frequency sets based on this setup were used. Frequency Set: 6 Setup file default. Used pcal sets: 4 LO sum= 8413.99 8413.99 8415.99 8415.99 8417.99 8417.99 8419.99 8419.99 BBC fr= 813.99 813.99 815.99 815.99 817.99 817.99 819.99 819.99 Bandwd= 1.000 1.000 1.000 1.000 1.000 1.000 1.000 1.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 4 PCAL = OFF PCALXB1= S1 S2 S3 S4 S5 S6 S7 S8 PCALXB2= M1 M2 M3 M4 M5 M6 M7 M8 PCALFR1= 0 0 0 0 0 0 0 0 PCALFR2= 0 0 0 0 0 0 0 0 Track assignments are: track1= 2, 6, 10, 14, 18, 22, 26, 30 track2= 3, 7, 11, 15, 19, 23, 27, 31 barrel=roll_auto Setup file: amt-32-8-1.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 7 Station: VLBA Total bit rate: 32 Format: VLBA1:2 Bits per sample: 1 Sample rate: 4.000 Number of channels: 8 Passes/head pos: 2 Speedup factor: 4.00 Tape speeds: Low density - 66.665 ips, High density - 40.00 ips Time per pass for 16800 ft, High density tapes is: 01:24:00 1st LO= 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 7600.00 Net SB= L U L U L U L U Pol. = LCP LCP LCP LCP LCP LCP LCP LCP BBC = 1 1 2 2 3 3 4 4 BBC SB= L U L U L U L U IF = D D D D D D D D VLBA FE= omit 4cm omit 4cm VLBA Synth= 7.6 15.4 15.4 The following frequency sets based on this setup were used. Frequency Set: 7 Setup file default. Used pcal sets: 5 LO sum= 8410.99 8410.99 8414.99 8414.99 8418.99 8418.99 8422.99 8422.99 BBC fr= 810.99 810.99 814.99 814.99 818.99 818.99 822.99 822.99 Bandwd= 2.000 2.000 2.000 2.000 2.000 2.000 2.000 2.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 5 PCAL = OFF PCALXB1= S1 S3 S5 S7 OFF OFF OFF OFF PCALXB2= S2 S4 S6 S8 OFF OFF OFF OFF PCALFR1= 0 0 0 0 0 0 0 0 PCALFR2= 0 0 0 0 0 0 0 0 Track assignments are: track1= 2, 6, 10, 14, 18, 22, 26, 30 track2= 3, 7, 11, 15, 19, 23, 27, 31 barrel=roll_auto Setup file: amt-32-4-2.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 8 Station: VLBA Total bit rate: 32 Format: VLBA1:2 Bits per sample: 2 Sample rate: 4.000 Number of channels: 4 Passes/head pos: 2 Speedup factor: 4.00 Tape speeds: Low density - 66.665 ips, High density - 40.00 ips Time per pass for 16800 ft, High density tapes is: 01:24:00 1st LO= 7600.00 7600.00 7600.00 7600.00 Net SB= L U L U Pol. = LCP LCP LCP LCP BBC = 1 1 2 2 BBC SB= L U L U IF = D D D D VLBA FE= omit 4cm omit 4cm VLBA Synth= 7.6 15.4 15.4 The following frequency sets based on this setup were used. Frequency Set: 8 Setup file default. Used pcal sets: 6 LO sum= 8414.99 8414.99 8418.99 8418.99 BBC fr= 814.99 814.99 818.99 818.99 Bandwd= 2.000 2.000 2.000 2.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 6 PCAL = OFF PCALXB1= S1 S2 S3 S4 OFF OFF OFF OFF PCALXB2= M1 M2 M3 M4 OFF OFF OFF OFF PCALFR1= 0 0 0 0 0 0 0 0 PCALFR2= 0 0 0 0 0 0 0 0 Track assignments are: track1= 2, 10, 18, 26 track2= 3, 11, 19, 27 barrel=roll_auto Setup file: amt-32-4-1.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 9 Station: VLBA Total bit rate: 32 Format: VLBA1:4 Bits per sample: 1 Sample rate: 8.000 Number of channels: 4 Passes/head pos: 2 Speedup factor: 4.00 Tape speeds: Low density - 66.665 ips, High density - 40.00 ips Time per pass for 16800 ft, High density tapes is: 01:24:00 1st LO= 7600.00 7600.00 7600.00 7600.00 Net SB= L U L U Pol. = LCP LCP LCP LCP BBC = 1 1 2 2 BBC SB= L U L U IF = D D D D VLBA FE= omit 4cm omit 4cm VLBA Synth= 7.6 15.4 15.4 The following frequency sets based on this setup were used. Frequency Set: 9 Setup file default. Used pcal sets: 1 LO sum= 8412.99 8412.99 8420.99 8420.99 BBC fr= 812.99 812.99 820.99 820.99 Bandwd= 4.000 4.000 4.000 4.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 PCAL = OFF PCALXB1= S1 S3 OFF OFF OFF OFF OFF OFF PCALXB2= S2 S4 OFF OFF OFF OFF OFF OFF PCALFR1= 0 0 0 0 0 0 0 0 PCALFR2= 0 0 0 0 0 0 0 0 Track assignments are: track1= 2, 10, 18, 26 track2= 3, 11, 19, 27 barrel=roll_auto Setup file: amt-32-2-2.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 10 Station: VLBA Total bit rate: 32 Format: VLBA1:4 Bits per sample: 2 Sample rate: 8.000 Number of channels: 2 Passes/head pos: 2 Speedup factor: 4.00 Tape speeds: Low density - 66.665 ips, High density - 40.00 ips Time per pass for 16800 ft, High density tapes is: 01:24:00 1st LO= 7600.00 7600.00 Net SB= L U Pol. = LCP LCP BBC = 1 1 BBC SB= L U IF = D D VLBA FE= omit 4cm omit 4cm VLBA Synth= 7.6 15.4 15.4 The following frequency sets based on this setup were used. Frequency Set: 10 Setup file default. Used pcal sets: 2 LO sum= 8416.99 8416.99 BBC fr= 816.99 816.99 Bandwd= 4.000 4.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 2 PCAL = OFF PCALXB1= S1 S2 OFF OFF OFF OFF OFF OFF PCALXB2= M1 M2 OFF OFF OFF OFF OFF OFF PCALFR1= 0 0 0 0 0 0 0 0 PCALFR2= 0 0 0 0 0 0 0 0 Track assignments are: track1= 2, 18 track2= 3, 19 barrel=roll_auto SOURCE LIST -- VLBA "M5-Modes" Test / 16-Track Modes 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) (B1950) (J2000) (Date) J0319+4130 03 16 29.567273 * 03 19 48.160103 03 20 06.011358 0316+413 41 19 51.91592 * 41 30 42.10305 41 31 38.74211 * 3C84 /home/filehost/cwalker/sched/catalogs/sources.vlba J0319+41 ICRF - Ext.1 Source - 1998 IERS Annual Report 1.000 scan hours, 9.900 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 93.7 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