COVER INFORMATION Station: VLBA_KP (Code Kp ) Experiment: Huygens Probe VLBI Tracking Exp. Code: th025b Schedule Version: 1.00 Processed by SCHED version: NRAO internal release of 4 October 2004 PI: Jon Romney Address: NRAO/AOC Phone: x7360 EMAIL: jromney@aoc.nrao.edu Fax: Phone during observation: AOC Control Room Observing mode: VLBA Notes: Test A for Huygens Setup Schedule for VLBA_KP (Code Kp ) Page 2 Huygens Probe VLBI Tracking 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 27 Dec 2004 Day 362 --- Next scan frequencies: 2034.99 2034.99 2139.99 2286.99 2040.30 2040.30 2098.20 2098.20 Next BBC frequencies: 865.01 865.01 760.01 613.01 859.70 859.70 801.80 801.80 Next scan bandwidths: 16.00 16.00 16.00 16.00 1.00 1.00 1.00 1.00 23 15 00 3C454.3 22 15 38 72.0 148.7 -0.6 -27.3 0 1 1 0 Stopped 23 20 00 --- 22 20 39 72.5 152.3 -0.6 -24.3 300 S 1 0 Next scan frequencies: 2034.99 2034.99 2034.99 2034.99 2139.99 2139.99 2286.99 2286.99 Next BBC frequencies: 865.01 865.01 865.01 865.01 760.01 760.01 613.01 613.01 Next scan bandwidths: 16.00 16.00 16.00 16.00 16.00 16.00 16.00 16.00 23 20 00 3C454.3 22 20 39 72.5 152.3 -0.6 -24.3 -4 1 1 0 23 20 00 23 25 00 --- 22 25 40 72.9 156.0 -0.5 -21.0 296 F 1 0 23 25 00 3C454.3 22 25 40 72.9 156.0 -0.5 -21.0 -4 1 1 0 23 25 00 23 30 00 --- 22 30 41 73.3 159.9 -0.4 -17.6 296 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: set16.set Matches group v13cm_1 in ./freq_gg057c.dat LA,NL only 2200-2400 Setup group: 1 Station: VLBA Total bit rate: 512 Format: VLBA1:4 Bits per sample: 2 Sample rate: 32.000 Number of channels: 8 Passes/head pos: 1 Speedup factor: 1.00 1st LO= 2900.00 2900.00 2900.00 2900.00 2900.00 2900.00 2900.00 2900.00 Net SB= U U U U U U U U Pol. = RCP LCP RCP RCP RCP LCP RCP LCP BBC = 1 2 3 4 5 6 7 8 BBC SB= L L L L L L L L IF = A C A A A C A C VLBA FE= 13cm omit 13cm omit VLBA Synth= 15.4 2.9 15.4 The following frequency sets based on this setup were used. Frequency Set: 1 Setup file default. Used pcal sets: 1 LO sum= 2034.99 2034.99 2139.99 2286.99 2040.30 2040.30 2098.20 2098.20 BBC fr= 865.01 865.01 760.01 613.01 859.70 859.70 801.80 801.80 Bandwd= 16.000 16.000 16.000 16.000 1.000 1.000 1.000 1.000 The following pulse cal sets were used with this setup: Pulse cal detection set: 1 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, 18, 3, 19, 66, 82, 67, 83 barrel=roll_auto Setup file: huygS.set Matches group v13cm_1 in ./freq_gg057c.dat LA,NL only 2200-2400 Setup group: 2 Station: VLBA Total bit rate: 512 Format: VLBA1:4 Bits per sample: 2 Sample rate: 32.000 Number of channels: 8 Passes/head pos: 1 Speedup factor: 1.00 1st LO= 2900.00 2900.00 2900.00 2900.00 2900.00 2900.00 2900.00 2900.00 Net SB= L L U U L U L U Pol. = RCP LCP RCP LCP RCP RCP RCP RCP BBC = 1 2 1 2 3 3 4 4 BBC SB= U U L L U L U L IF = A C A C A A A A VLBA FE= 13cm omit 13cm omit VLBA Synth= 15.4 2.9 15.4 The following frequency sets based on this setup were used. Frequency Set: 2 Setup file default. Used pcal sets: 1 LO sum= 2034.99 2034.99 2034.99 2034.99 2139.99 2139.99 2286.99 2286.99 BBC fr= 865.01 865.01 865.01 865.01 760.01 760.01 613.01 613.01 Bandwd= 16.000 16.000 16.000 16.000 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 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, 18, 3, 19, 66, 82, 67, 83 barrel=roll_auto SOURCE LIST -- Huygens Probe VLBI Tracking 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) J2253+1608 22 51 29.519733 * 22 53 57.747932 22 54 11.403312 2251+158 15 52 54.34806 * 16 08 53.56089 16 10 28.89537 * 3C454.3 /home/filehost/cwalker/sched/catalogs/sources.vlba J2253+16 ICRF - Ext.1 Source - 1998 IERS Annual Report 0.167 scan hours, 4.604 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) 3C454.3 75.9 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