COVER INFORMATION Station: HART_S2 (Code Hh ) Experiment: VSOP observation of J2218-03 at 1.6 GHz Exp. Code: w009c3 Schedule Version: 1.00 Processed by SCHED version: Release of 28 April 2000 PI: Roger P. Linfield Address: Mail Stop 238-600 Jet Propulsion Laboratory Pasadena, CA 91109 USA Phone: 1-818-354-2806 EMAIL: rpl@ipac.caltech.edu Fax: 1-818-393-4965 Phone during observation: Observing mode: VSOP, 1.6 GHz continuum, 128-2-2 Notes: Fringe finder : J2148+06 Schedule for HART_S2 (Code Hh ) Page 2 VSOP observation of J2218-03 at 1.6 GHz 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. ---------------------------------------------------------------------------------------- Start UT Source Start / Stop Early Tapes TPStart Stop UT LST EL AZ HA UP ParA Dwell (see above) ---------------------------------------------------------------------------------------- --- Sat 25 Nov 2000 Day 330 --- Next scan frequencies: 1634.00 1650.00 Next BBC frequencies: 143.40 159.40 Next scan bandwidths: 16.00 16.00 10 40 00 J2218-03 16 49 29 8.4 89.9 -5.5 -115.7 0 1 1 52 10 40 00 11 00 00 --- 17 09 32 13.0 87.7 -5.2 -115.8 1200 F 1 472 11 00 00 J2218-03 17 09 32 13.0 87.7 -5.2 -115.8 -2 1 1 472 11 00 00 12 00 00 --- 18 09 42 26.4 80.6 -4.2 -117.2 3598 F 1 1732 12 00 00 J2218-03 18 09 42 26.4 80.6 -4.2 -117.2 -2 1 1 1732 12 00 00 13 00 00 --- 19 09 52 39.5 71.9 -3.2 -121.0 3598 F 1 2992 SETUP FILE INFORMATION: NOTE: If DOPPLER, FREQ, or BW were used, see the individual scans for the final BBC settings. Setup file: /home/sched/short-term/progs/current/setups/vsop1634_s2.set Matches group hh18cm in /home/sched/short-term/progs/current/catalogs/freq.dat e-mail Jonathan Quick 110599, but is LBA DAR Setup group: 4 Station: HART_S2 Total bit rate: 128 Format: S2 Bits per sample: 2 Sample rate: 32.000 Number of channels: 2 Passes/head pos: 1 Speedup factor: 1.00 Tape speeds: Low density - 6.300 ips, High density - 4.20 ips Time per pass for 7600 ft, High density tapes is: 06:01:54 1st LO= 1490.60 1490.60 Net SB= U U Pol. = LCP LCP BBC = 1 3 BBC SB= U U IF = 1N 1N The following frequency sets based on this setup were used. Frequency Set: 5 Setup file default. No pcal detection. LO sum= 1634.00 1650.00 BBC fr= 143.40 159.40 Bandwd= 16.000 16.000 Track assignments are: track1= 0, 0 barrel=roll_off SOURCE LIST -- VSOP observation of J2218-03 at 1.6 GHz Catalog positions marked with *. Position of date is for stop time of first scan. Names used in schedule marked with *. Short names used in VLA and SNAP files marked with +. Source Source position (RA/Dec) (B1950) (J2000) (Date) J2148+0657 21 45 36.078484 * 21 48 05.458682 21 48 06.898836 2145+067 06 43 40.90444 * 06 57 38.60404 06 57 55.51616 * J2148+06 /home/sched/short-term/progs/current/catalogs/sources.vlba USNO - Ref Frame 1998-6, Eubanks June 1998 J2218-0335 22 16 16.381739 * 22 18 52.037727 22 18 53.696962 2216-038 -03 50 40.62454 *-03 35 36.87963 -03 35 23.32221 * J2218-03 /home/sched/short-term/progs/current/catalogs/sources.vlba USNO - Ref Frame 1998-6, Eubanks June 1998 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) J2148+06 88.4 J2218-03 91.8 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