SUMMARY FILE FOR PROJECT: TM015F COVER INFORMATION: Experiment: VLBA "M5-Modes" Test / 8-Track Modes Exp. Code: TM015F Start Day 238 is Wed 25 Aug 2004 MJD 53242 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: No cover letter provided. CORRELATION REQUESTS (Defaults in parentheses): Correlator (Required if recording): VLBA CORRELATOR, SOCORRO Correlator average time (2 sec): 2.000 sec. Alternate average time (for spacecraft). 0.000 sec. Spectral channels per baseband (16): 16 Number of antennas to be correlated: 1 Polarization (ON): OFF Correlator weighting function (UNIFORM): UNIFORM Distribution tape (DAT): DAT Source positions from: STANDARD CATALOG Shipping address for correlator output: J. Romney, AOC mailbox Correlator Notes: Check with JDR about grouping scans into correlator jo DERIVED INFORMATION FOR CORRELATION: Elapsed time for project: 1.00 hours. Total time in scheduled scans: 1.00 hours. Total time in recording scans: 1.00 hours. Total number of baseline hours: 15.00 (Recording scans only) Projected maximum data output rate from the correlator: 30.7 kbytes/sec if processed in one pass. Projected correlator output data set size: 10.7 Mbytes NOTE: Above numbers assume the same correlator parameters are used for all data. STATIONS USED IN SCHEDULE: Station Code Latitude Longitude Elevation X Y Z VLBA_FD Fd 30.63503 103.94482 1606. -1324009.12 -5332181.97 3231962.47 VLBA_KP Kp 31.95630 111.61242 1902. -1995678.62 -5037317.71 3357328.13 VLBA_LA La 35.77512 106.24560 1962. -1449752.35 -4975298.59 3709123.93 VLBA_NL Nl 41.77142 91.57414 222. -130872.24 -4762317.12 4226851.04 VLBA_PT Pt 34.30102 108.11919 2365. -1640953.70 -5014816.03 3575411.88 BASELINE LENGTHS (km) Fd Kp La Nl Pt Fd 0 744 608 1654 564 Kp 744 0 652 2075 417 La 608 652 0 1432 236 Nl 1654 2075 1432 0 1663 Pt 564 417 236 1663 0 RECORDING SYSTEM INFORMATION: Some stations may be scheduled for both tape and disk. TAPES - Stations potentially recording on tape. (See setup details later for times per pass.) Station Drives Head pos Tape len Density Start position Auto Auto Recorder (ft) Driv Head indx Aloc Reverse VLBA_FD 2 14 16800 High 1 1 Yes Yes VLBA VLBA_KP 2 14 16800 High 1 1 Yes Yes VLBA VLBA_LA 2 14 16800 High 1 1 Yes Yes VLBA VLBA_NL 2 14 16800 High 1 1 Yes Yes VLBA DISKS - Stations potentially recording on disks. Station Drive type VLBA_PT MARK5A EXPERIMENT SUMMARY: Number of input scans: 10 Number of scans scheduled: 10 Number of stations: 5 Number of sources input: 1 Number of setup files used: 10 Station summaries (tape stations): Station Control Scans Scan Hours Tape hours Tapes Passes Readbacks VLBA_FD VLBA 10 1.00 1.00 1 1 0 VLBA_KP VLBA 10 1.00 1.00 1 1 0 VLBA_LA VLBA 10 1.00 1.00 1 1 0 VLBA_NL VLBA 10 1.00 1.00 1 1 0 Station summaries (disk stations): Station Control Scans Scan Hours Record hrs Gbytes VLBA_PT VLBA 10 1.00 1.00 10. Setup file: amt-64-2-1.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 1 Station: VLBA Total bit rate: 64 Format: VLBA1:4 Bits per sample: 1 Sample rate: 32.000 Number of channels: 2 Passes/head pos: 4 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: 1 Setup file default. Used pcal sets: 1 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: 1 PCAL = OFF PCALXB1= S1 OFF OFF OFF OFF OFF OFF OFF PCALXB2= S2 OFF 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 track2= 18, 26 track3= 3, 11 track4= 19, 27 barrel=roll_auto Setup file: amt-64-1-2.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 2 Station: VLBA Total bit rate: 64 Format: VLBA1:4 Bits per sample: 2 Sample rate: 32.000 Number of channels: 1 Passes/head pos: 4 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 Net SB= L Pol. = LCP BBC = 1 BBC SB= L IF = 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= 8424.99 BBC fr= 824.99 Bandwd= 16.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 2 PCAL = OFF PCALXB1= S1 OFF OFF OFF OFF OFF OFF OFF PCALXB2= M1 OFF 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 track2= 18 track3= 3 track4= 19 barrel=roll_auto Setup file: amt-32-2-1.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 3 Station: VLBA Total bit rate: 32 Format: VLBA1:4 Bits per sample: 1 Sample rate: 16.000 Number of channels: 2 Passes/head pos: 4 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: 3 Setup file default. Used pcal sets: 1 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: 1 PCAL = OFF PCALXB1= S1 OFF OFF OFF OFF OFF OFF OFF PCALXB2= S2 OFF 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 track2= 18, 26 track3= 3, 11 track4= 19, 27 barrel=roll_auto Setup file: amt-32-1-2.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 4 Station: VLBA Total bit rate: 32 Format: VLBA1:4 Bits per sample: 2 Sample rate: 16.000 Number of channels: 1 Passes/head pos: 4 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 Net SB= L Pol. = LCP BBC = 1 BBC SB= L IF = 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= 8420.99 BBC fr= 820.99 Bandwd= 8.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 2 PCAL = OFF PCALXB1= S1 OFF OFF OFF OFF OFF OFF OFF PCALXB2= M1 OFF 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 track2= 18 track3= 3 track4= 19 barrel=roll_auto Setup file: amt-16-8-1.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 5 Station: VLBA Total bit rate: 16 Format: VLBA1:1 Bits per sample: 1 Sample rate: 2.000 Number of channels: 8 Passes/head pos: 4 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: 5 Setup file default. Used pcal sets: 3 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: 3 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, 4, 6, 8, 10, 12, 14, 16 track2= 18, 20, 22, 24, 26, 28, 30, 32 track3= 3, 5, 7, 9, 11, 13, 15, 17 track4= 19, 21, 23, 25, 27, 29, 31, 33 barrel=roll_auto Setup file: amt-16-4-2.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 6 Station: VLBA Total bit rate: 16 Format: VLBA1:1 Bits per sample: 2 Sample rate: 2.000 Number of channels: 4 Passes/head pos: 4 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: 6 Setup file default. Used pcal sets: 4 LO sum= 8415.99 8415.99 8417.99 8417.99 BBC fr= 815.99 815.99 817.99 817.99 Bandwd= 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 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, 6, 10, 14 track2= 18, 22, 26, 30 track3= 3, 7, 11, 15 track4= 19, 23, 27, 31 barrel=roll_auto Setup file: amt-16-4-1.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 7 Station: VLBA Total bit rate: 16 Format: VLBA1:2 Bits per sample: 1 Sample rate: 4.000 Number of channels: 4 Passes/head pos: 4 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: 7 Setup file default. Used pcal sets: 5 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: 5 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, 6, 10, 14 track2= 18, 22, 26, 30 track3= 3, 7, 11, 15 track4= 19, 23, 27, 31 barrel=roll_auto Setup file: amt-16-2-2.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 8 Station: VLBA Total bit rate: 16 Format: VLBA1:2 Bits per sample: 2 Sample rate: 4.000 Number of channels: 2 Passes/head pos: 4 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: 8 Setup file default. Used pcal sets: 6 LO sum= 8416.99 8416.99 BBC fr= 816.99 816.99 Bandwd= 2.000 2.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 6 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, 10 track2= 18, 26 track3= 3, 11 track4= 19, 27 barrel=roll_auto Setup file: amt-16-2-1.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 9 Station: VLBA Total bit rate: 16 Format: VLBA1:4 Bits per sample: 1 Sample rate: 8.000 Number of channels: 2 Passes/head pos: 4 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: 9 Setup file default. Used pcal sets: 1 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: 1 PCAL = OFF PCALXB1= S1 OFF OFF OFF OFF OFF OFF OFF PCALXB2= S2 OFF 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 track2= 18, 26 track3= 3, 11 track4= 19, 27 barrel=roll_auto Setup file: amt-16-1-2.set Matches group v4cm_3 in /home/filehost/cwalker/sched_2004aug04/catalogs/freq.dat Setup group: 10 Station: VLBA Total bit rate: 16 Format: VLBA1:4 Bits per sample: 2 Sample rate: 8.000 Number of channels: 1 Passes/head pos: 4 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 Net SB= L Pol. = LCP BBC = 1 BBC SB= L IF = 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= 8418.99 BBC fr= 818.99 Bandwd= 4.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 2 PCAL = OFF PCALXB1= S1 OFF OFF OFF OFF OFF OFF OFF PCALXB2= M1 OFF 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 track2= 18 track3= 3 track4= 19 barrel=roll_auto SUMMARY for experiment TM015F VLBA "M5-Modes" Test / 8-Track Modes Top item is: Start elevation, flag (D=>Down, H=>Below Horizon, t=>Tape Change.) Bottom item is: End elevation, flag (D=>Down, H=>Below Horizon, t=>Tape Change.) TYPE top: -=> normal scan, P=>Pointing or Ta; bottom: -=>recording, N=>not recording. Day 238 is Wed 25 Aug 2004 MJD 53242 DAY START UT SOURCE TYPE STATIONS t => tape change STOP UT Fd Kp La Nl Pt 238 13:30:00 3C84 - 69 75 73 64 74 238 13:32:00 amt-64-2-1 - 68 74 73 64 73 238 13:32:00 3C84 - 68 74 73 64 73 238 13:34:00 amt-64-1-2 - 68 74 72 63 73 238 13:34:00 3C84 - 68 74 72 63 73 238 13:38:00 amt-32-2-1 - 67 73 72 63 72 238 13:38:00 3C84 - 67 73 72 63 72 238 13:42:00 amt-32-1-2 - 67 73 71 62 72 238 13:42:00 3C84 - 67 73 71 62 72 238 13:50:00 amt-16-8-1 - 65 71 69 60 70 238 13:50:00 3C84 - 65 71 69 60 70 238 13:58:00 amt-16-4-2 - 64 70 68 59 69 238 13:58:00 3C84 - 64 70 68 59 69 238 14:06:00 amt-16-4-1 - 62 69 66 57 67 238 14:06:00 3C84 - 62 69 66 57 67 238 14:14:00 amt-16-2-2 - 61 67 65 56 66 238 14:14:00 3C84 - 61 67 65 56 66 238 14:22:00 amt-16-2-1 - 59 66 63 55 64 238 14:22:00 3C84 - 59 66 63 55 64 238 14:30:00 amt-16-1-2 - 58 64 62 53 63 SUMMARY for experiment TM015F VLBA "M5-Modes" Test / 8-Track Modes Top item is: Scan end: Tape drive, direction, and head index. Disk Gbytes. Bottom item is: Headset at scan end and tape footage (thousands) at scan start. Tape parameters are only predictions for stations using automatic tape allocation. TYPE top: -=> normal scan, P=>Pointing or Ta; bottom: -=>recording, N=>not recording. Day 238 is Wed 25 Aug 2004 MJD 53242 DAY START UT SOURCE TYPE STATIONS t => tape change STOP UT Fd Kp La Nl Pt 238 13:30:00 3C84 - 1F01 1F01 1F01 1F01 0 238 13:32:00 amt-64-2-1 - 1/00 1/00 1/00 1/00 1/00 238 13:32:00 3C84 - 1F01 1F01 1F01 1F01 1 238 13:34:00 amt-64-1-2 - 1/02 1/02 1/02 1/02 1/00 238 13:34:00 3C84 - 1F01 1F01 1F01 1F01 2 238 13:38:00 amt-32-2-1 - 1/03 1/03 1/03 1/03 1/00 238 13:38:00 3C84 - 1F01 1F01 1F01 1F01 3 238 13:42:00 amt-32-1-2 - 1/05 1/05 1/05 1/05 1/00 238 13:42:00 3C84 - 1F01 1F01 1F01 1F01 4 238 13:50:00 amt-16-8-1 - 1/06 1/06 1/06 1/06 1/00 238 13:50:00 3C84 - 1F01 1F01 1F01 1F01 5 238 13:58:00 amt-16-4-2 - 1/08 1/08 1/08 1/08 1/00 238 13:58:00 3C84 - 1F01 1F01 1F01 1F01 6 238 14:06:00 amt-16-4-1 - 1/10 1/10 1/10 1/10 1/00 238 14:06:00 3C84 - 1F01 1F01 1F01 1F01 7 238 14:14:00 amt-16-2-2 - 1/11 1/11 1/11 1/11 1/00 238 14:14:00 3C84 - 1F01 1F01 1F01 1F01 8 238 14:22:00 amt-16-2-1 - 1/13 1/13 1/13 1/13 1/00 238 14:22:00 3C84 - 1F01 1F01 1F01 1F01 9 238 14:30:00 amt-16-1-2 - 1/14 1/14 1/14 1/14 1/00 Automatic tape allocation requested for sites using VLBA control files and having 2 or more drives. SCHED cannot predict tape changes. Number of tapes used at each autoaloc station: Station Tapes VLBA_FD 0.02 VLBA_KP 0.02 VLBA_LA 0.02 VLBA_NL 0.02 VLBA_PT 0.00 ESTIMATED TAPE TIMES (With autoallocation): Times are approximate and assume project starts at the beginning of a tape. Times can be affected by actual tape length. Tape change may occur during scan preceeding indicated time. Tape start time. Tape end time. Station Day Time Day Time (UT) (UT) VLBA_FD 238 13:30:00 238 14:30:00 VLBA_KP 238 13:30:00 238 14:30:00 VLBA_LA 238 13:30:00 238 14:30:00 VLBA_NL 238 13:30:00 238 14:30:00 VLBA_PT 238 13:30:00 238 14:30:00 SOURCE LIST -- VLBA "M5-Modes" Test / 8-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 06.013818 0316+413 41 19 51.91592 * 41 30 42.10305 41 31 38.75126 * 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 J2000 coordinates formatted for possible transfer to the correlator data base: name = '3C84' ra = 03h19m48.160103s dec = 41d30'42.10305" Code versions: Release version: Trial release of 30 July 2004 Version of sched code: 5.24 Version of VEX standard: 1.50 Version of VEX code: 0.79 Version of plot code: 1.05 Version of ephemeris code: 1.01 Version of PGPLOT: v5.2.0