COVER INFORMATION Station: VLBA_FD (Code Fd ) Experiment: BL110 - VLBA fmt 22 cm Exp. Code: BL110g Schedule Version: 1.00 Processed by SCHED version: Release of 02 July 2002 PI: T. J. W. Lazio Address: NRL Code 7213 Washington, DC 20375-5351 USA Phone: 1-202-404-6329 EMAIL: lazio@rsd.nrl.navy.mil Fax: 1-202-404-8894 Phone during observation: 1-202-404-6329 Observing mode: continuum Notes: Fringe finder: B2251+1552; observing 4 target sources local contact: Anish Roshi aroshi@nrao.edu Phone: 1-304-456-2130 Schedule for VLBA_FD (Code Fd ) Page 2 BL110 - VLBA fmt 22 cm 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) ---------------------------------------------------------------------------------------- --- Thu 8 Aug 2002 Day 220 --- Next scan frequencies: 1371.50 1371.50 1379.50 1379.50 Next BBC frequencies: 728.50 728.50 720.50 720.50 Next scan bandwidths: 8.00 8.00 8.00 8.00 06 36 04 B2210+5657 20 46 42 59.6 22.9 -1.4 -141.7 0 1 1 0 06 36 04 06 51 01 --- 21 01 42 60.7 19.6 -1.2 -147.8 898 F 1 5984 06 51 13 B2210+5958 21 01 54 58.1 16.6 -1.2 -150.3 1 1 1 5984 06 51 01 07 06 11 --- 21 16 54 59.0 13.4 -0.9 -156.3 898 F 1 12046 07 07 59 B2251+1552 21 18 42 63.9 118.2 -1.6 -52.1 32 1 1 12046 07 07 59 07 11 58 --- 21 22 42 64.6 119.6 -1.5 -51.2 239 F 1 13642 07 13 49 B2212+5935 21 24 33 59.6 12.3 -0.8 -158.6 33 1 2 13642 07 13 49 07 28 46 --- 21 39 33 60.2 8.7 -0.6 -164.9 898 R 1 15574 07 28 54 B2212+6013 21 39 41 59.6 8.4 -0.6 -165.1 0 1 2 15574 07 28 46 07 43 51 --- 21 54 41 60.0 4.8 -0.3 -171.5 898 R 1 9543 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: BL110.set Matches group v20cm_1 in /home/filehost/cwalker/sched/catalogs/freq.dat FD and KP filtered below 1330. SC filtered above 1440 Setup group: 1 Station: VLBA Total bit rate: 128 Format: VLBA1:4 Bits per sample: 2 Sample rate: 16.000 Number of channels: 4 Passes/head pos: 1 Speedup factor: 2.00 Tape speeds: Low density - 133.330 ips, High density - 80.00 ips Time per pass for 17600 ft, High density tapes is: 00:44:00 1st LO= 2100.00 2100.00 2100.00 2100.00 Net SB= U U U U Pol. = RCP LCP RCP LCP BBC = 1 2 3 4 BBC SB= L L L L IF = A C A C VLBA FE= 20cm omit 20cm omit VLBA Synth= 15.4 2.1 15.4 The following frequency sets based on this setup were used. Frequency Set: 1 Setup file default. Used pcal sets: 1 LO sum= 1371.50 1371.50 1379.50 1379.50 BBC fr= 728.50 728.50 720.50 720.50 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 = 1MHZ PCALXB1= S1 S3 S1 S3 S1 S2 S3 S4 PCALXB2= S2 S4 S2 S4 M1 M2 M3 M4 PCALFR1= 500 500 6500 6500 0 0 0 0 PCALFR2= 500 500 6500 6500 0 0 0 0 Track assignments are: track1= 2, 18, 3, 19 barrel=roll_auto SOURCE LIST -- BL110 - VLBA fmt 22 cm 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). Source Source position (RA/Dec) (B1950) (J2000) (Date) * B2210+5657 * 22 10 21.930000 22 12 08.557144 22 12 15.488650 * 56 57 56.60000 57 12 47.81329 57 13 25.51121 From catalog imbedded in main SCHED input file. * B2210+5958 * 22 10 55.440000 22 12 36.393218 22 12 43.235193 * 59 58 13.50000 60 13 05.72370 60 13 43.00067 From catalog imbedded in main SCHED input file. * B2212+5935 * 22 12 18.900000 22 14 01.259941 22 14 08.137411 * 59 35 57.10000 59 50 52.09697 59 51 29.47134 From catalog imbedded in main SCHED input file. * B2212+6013 * 22 12 33.750000 22 14 14.897277 22 14 21.757942 * 60 13 41.40000 60 28 36.86117 60 29 14.15109 From catalog imbedded in main SCHED input file. * B2251+1552 * 22 51 29.528100 22 53 57.756321 22 54 05.696584 * 15 52 54.24200 16 08 53.45499 16 09 39.84826 From catalog imbedded in main SCHED input file. 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) B2210+5657 105.6 B2210+5958 102.6 B2212+5935 102.9 B2212+6013 102.3 B2251+1552 139.1 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