SUMMARY FILE FOR PROJECT: BL112 COVER INFORMATION: Experiment: Interstellar Scattering Observations of 1849+005 Exp. Code: BL112 Schedule Version: 2.00 Processed by SCHED version: Release of 02 July 2002 PI: Joseph Lazio Address: 6108 Redwood Lane Alexandria, VA 22310-2933 USA Phone: 202 404 6329 EMAIL: Joseph.Lazio@nrl.navy.mil Fax: 202 404 8894 Phone during observation: 202 404 6329 Observing mode: 13cm Notes: 1.5 hr dynamically-scheduled, ad hoc proposal LST(PT) start time can be in the range 15h to 20h Send observing logs and data tape to J. Lazio, address above No cover letter provided. CORRELATION REQUESTS (Defaults in parentheses): Correlator (Required if recording): 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: 5 Polarization (ON): OFF Correlator weighting function (UNIFORM): UNIFORM Distribution tape (DAT): TERMINUS Source positions from: FROM SCHEDULE AND MASTER CATALOG Shipping address for correlator output: Joseph Lazio 6108 Redwood Lane Alexandria, VA 22310-2933 USA Correlator Notes: Distribute to Terminus. It is small enough for the observer to FTP. DERIVED INFORMATION FOR CORRELATION: Elapsed time for project: 1.55 hours. Total time in scheduled scans: 1.48 hours. Total time in recording scans: 1.48 hours. Total number of baseline hours: 22.19 (Recording scans only) Projected maximum data output rate from the correlator: 15.4 kbytes/sec if processed in one pass. Projected correlator output data set size: 40.9 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_PT Pt 34.30102 108.11919 2365. -1640953.70 -5014816.03 3575411.88 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_FD Fd 30.63503 103.94482 1606. -1324009.12 -5332181.97 3231962.47 VLBA_OV Ov 37.23165 118.27705 1196. -2409150.10 -4478573.23 3838617.39 BASELINE LENGTHS (km) Pt Kp La Fd Ov Pt 0 417 236 564 973 Kp 417 0 652 744 845 La 236 652 0 608 1088 Fd 564 744 608 0 1508 Ov 973 845 1088 1508 0 TAPE INITIALIZATION and CONTROL INFORMATION: (See setup details later for times per pass.) Station Drives Head pos Tape len Density Start position Auto Auto (ft) Drive Head index Aloc Reverse VLBA_PT 2 14 17600 High 1 1 Yes Yes VLBA_KP 2 14 17600 High 1 1 Yes Yes VLBA_LA 2 14 17600 High 1 1 Yes Yes VLBA_FD 2 14 17600 High 1 1 Yes Yes VLBA_OV 2 14 17600 High 1 1 Yes Yes EXPERIMENT SUMMARY: Number of input scans: 5 Number of scans scheduled: 5 Number of stations: 5 Number of sources input: 2 Number of setup files used: 1 Station summaries: Station Control Scans Scan Hours Tape hours Tapes Passes Readbacks VLBA_PT VLBA 5 1.48 1.48 1 2 2 VLBA_KP VLBA 5 1.48 1.48 1 2 2 VLBA_LA VLBA 5 1.48 1.48 1 2 2 VLBA_FD VLBA 5 1.48 1.48 1 2 2 VLBA_OV VLBA 5 1.48 1.48 1 2 2 Setup file: /home/filehost/cwalker/sched/setups/v13cm-128-8-1.set Matches group v13cm_2 in /home/filehost/cwalker/sched/catalogs/freq.dat LA,NL only 2200-2400 Setup group: 1 Station: VLBA Total bit rate: 128 Format: VLBA1:4 Bits per sample: 1 Sample rate: 16.000 Number of channels: 8 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= 3100.00 3100.00 3100.00 3100.00 3100.00 3100.00 3100.00 3100.00 Net SB= U U U U U U U U Pol. = RCP LCP RCP LCP 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 C A C A C VLBA FE= 13cm omit 13cm omit VLBA Synth= 15.4 3.1 15.4 The following frequency sets based on this setup were used. Frequency Set: 1 Setup file default. Used pcal sets: 1 LO sum= 2255.49 2255.49 2263.49 2263.49 2271.49 2271.49 2279.49 2279.49 BBC fr= 844.51 844.51 836.51 836.51 828.51 828.51 820.51 820.51 Bandwd= 8.000 8.000 8.000 8.000 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 S5 S7 S1 S3 S5 S7 PCALXB2= S2 S4 S6 S8 S2 S4 S6 S8 PCALFR1= 510 510 510 510 6510 6510 6510 6510 PCALFR2= 510 510 510 510 6510 6510 6510 6510 Track assignments are: track1= 2, 10, 18, 26, 3, 11, 19, 27 barrel=roll_auto SUMMARY for experiment BL112 Interstellar Scattering Observations of 1849+005 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 235 is Fri 23 Aug 2002 MJD 52509 DAY START UT SOURCE TYPE STATIONS t => tape change STOP UT Pt Kp La Fd Ov 235 01:07:49 1849+005 - 38 36 38 43 29 235 01:37:44 13cm-128-8-1 - 43 42 43 48 34 235 01:39:44 3C345 - 84 81 86 81 80 235 01:46:43 - - 84 81 86 80 81 235 01:46:43 1849+005 - 44 43 44 49 36 235 02:01:40 - - 46 46 46 52 38 235 02:03:40 3C345 - 84 82 84 79 84 235 02:10:39 - - 83 82 83 78 85 235 02:10:39 1849+005 - 48 47 48 53 40 235 02:40:34 - - 52 52 51 57 44 SUMMARY for experiment BL112 Interstellar Scattering Observations of 1849+005 Top item is: Tape drive, direction, and head index at scan end. 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 235 is Fri 23 Aug 2002 MJD 52509 DAY START UT SOURCE TYPE STATIONS t => tape change STOP UT Pt Kp La Fd Ov 235 01:07:49 1849+005 - 1F01 1F01 1F01 1F01 1F01 235 01:37:44 13cm-128-8-1 - 1/00 1/00 1/00 1/00 1/00 235 01:39:44 3C345 - 1F01 1F01 1F01 1F01 1F01 235 01:46:43 - - 1/12 1/12 1/12 1/12 1/12 235 01:46:43 1849+005 - 1R02 1R02 1R02 1R02 1R02 235 02:01:40 - - 1/15 1/15 1/15 1/15 1/15 235 02:03:40 3C345 - 1R02 1R02 1R02 1R02 1R02 235 02:10:39 - - 1/14 1/14 1/14 1/14 1/14 235 02:10:39 1849+005 - 1F03 1F03 1F03 1F03 1F03 235 02:40:34 - - 1/12 1/12 1/12 1/12 1/12 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_PT 0.14 VLBA_KP 0.14 VLBA_LA 0.14 VLBA_FD 0.14 VLBA_OV 0.14 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_PT 235 01:07:49 235 02:40:34 VLBA_KP 235 01:07:49 235 02:40:34 VLBA_LA 235 01:07:49 235 02:40:34 VLBA_FD 235 01:07:49 235 02:40:34 VLBA_OV 235 01:07:49 235 02:40:34 SOURCE LIST -- Interstellar Scattering Observations of 1849+005 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) * 1849+005 18 49 13.571323 * 18 51 46.720000 18 51 54.771908 00 31 53.29182 * 00 35 32.36600 00 35 47.17073 From catalog imbedded in main SCHED input file. Position from program VM110 J1642+3948 16 41 17.606214 * 16 42 58.809952 16 43 03.952892 1641+399 39 54 10.81489 * 39 48 36.99395 39 48 36.03044 * 3C345 /home/filehost/cwalker/sched/catalogs/sources.vlba J1642+39 ICRF - Ext.1 Source - 1998 IERS Annual Report 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) 1849+005 129.9 3C345 89.3 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 = '1849+005' ra = 18h51m46.720000s dec = 00d35'32.36600" name = '3C345' ra = 16h42m58.809952s dec = 39d48'36.99395" Code versions: Release version: Release of 02 July 2002 Version of sched code: 5.20 Version of VEX standard: 1.50 Version of VEX code: 0.78 Version of plot code: 1.05 Version of ephemeris code: 1.01 Version of PGPLOT: v5.2.0