From vlbiop@drao.nrc.ca Sat Feb 14 15:12:23 1998 Date: Fri, 13 Feb 1998 22:07:53 -0800 (PST) From: VLBI Operator To: VSOG Subject: VS04s data FITS data from experiment VS04s will be shipped to Japan on Monday February 16, 1998. Enclosed in this email is a copy of the PI letter. ========================================================================== PI INFORMATION LETTER FROM PENTICTON S2 CORRELATOR FOR EXPERIMENT VS04s ========================================================================== Dear PI: This letter is to inform you of some of the details of the correlation and analysis of your experiment 'VS04s'. Your contact person at the correlator is: David Del Rizzo Tel: (250) 493-2277 Fax: (250) 493-7767 email: Dave.DelRizzo@hia.nrc.ca and is the person who correlated your experiment. You can also contact the University of Calgary Radio Astronomy Lab for assistance with data reduction and imaging using AIPS and DIFFMAP. The data package that we are sending you contains this letter and the FITS data tape in the format requested in the VS04s.sum file. Additionally, there are a number of files on the University of Calgary ftp server that will be of interest to you. The .txt file is anonymous access and all other files are restricted access only. These files include: VS04s_DQA1.txt -- ASCII *summary* file of single baseline fringe search results. VS04s.dqa1 -- ASCII file of single baseline fringe search results. VS04s_DQA1.ps.gz -- gzipped postscript file of plots of single baseline fringe search results. This includes plots of phase cal extracted at the correlator and available in your FITS data. VS04s.log -- log file generated by the correlator. VS04s.comments -- comments extracted from station log files. VS04s.tsys -- Tsys data extracted from station log files. This is not formatted to read into AIPS but is provided as auxillary information if Tsys files are not otherwise available. In addition, since this is Space VLBI data there may be times when delay discontinuities occur on space baselines (VSOP_SC) -- due to tracking station handovers and 'clock setting events' at individual tracking stations resulting from momentary loss of downlink lock. These will show up as glitches or delay jumps in the VSOP_SC phase cal data and in the fringe fits results. For convenience, all times across which fringe fitting should not be done are at the end of this file in a format ready to be read in by AIPS' INDXR. The tracking passes are as follows: 'GBANK_TS' 1997-324-18:51:04 --> 1997-324-23:16:31 ...and periods of downlink loss are as follows: 324-20:36:58.930 -> 324-22:18:03.320 324-22:17:28.930 -> 324-22:18:03.320 324-22:17:38.930 -> 324-22:18:03.320 324-22:17:48.930 -> 324-22:18:03.320 324-22:17:58.930 -> 324-22:18:03.320 324-22:30:18.930 -> 324-22:30:36.320 324-22:30:53.230 -> 324-22:40:06.320 324-23:13:45.230 -> 324-23:13:56.320 324-23:13:55.230 -> 324-23:13:56.320 You will have approximately 3 weeks from today (Fri Feb 13 19:57:52 PST 1998) to look at the data and request recorrelation if there is a problem. Recorrelation requests will only be *considered* if the data is bad and it can be traced to the correlator or if there is a valid scientific reason (such as a change of correlation parameters or change of source coordinates). PLEASE LOOK AT THE DATA AS SOON AS POSSIBLE SINCE YOUR FEEDBACK TO THE MISSION IS IMPORTANT. Please contact the UofC RAL as soon as you are satisfied with the data so that re-cycling of VLBI tapes can occur with your input in a timely manner. If the data is bad or not scientifically acceptable due to problems at acquisition time, you must contact the VSOG to request re-observation of the radio source. If the data is good, then in accordance with mission policy, 18 months after it is released from the correlator, it will be available to any PI on a request basis. Good luck with your data! ================================= Correlator PR/Data analyst notes: ================================= - Kashima channel 2 data seems to have been all bad. - Extensive fringe searching was done to try and detect space fringes but no space fringes were found despite having found fringes with all GRT's. ================== POINTS OF CONTACT: ================== ---Correlator--- Operations email: vlbiop@drao.nrc.ca Operations Manager (Brent Carlson): bcarlson@drao.nrc.ca Tel: (250) 493-2277 (~16:00 to 24:00 UT) Fax: (250) 493-7767 Web: http://www.drao.nrc.ca Anonymous ftp: ftp.drao.nrc.ca /pub/vsop Address: Attn: Space VLBI Dominion Radio Astrophysical Observatory Hertzberg Institute of Astrophysics National Research Council of Canada White Lake Road (P.O. Box 248) Penticton, B.C. Canada V2A 6K3 ---University of Calgary RAL--- Bill Scott: bill@ras.ucalgary.ca Russ Taylor: russ@ras.ucalgary.ca Tel: (403) 220-7424 Fax: (403) 289-3331 Web: http://www.ras.ucalgary.ca ftp: cougar.ras.ucalgary.ca public directories: /pub/vsop/ restricted directories: /usr/home/vsopobs/vsop/ (contact Bill Scott for restricted access permissions) Address: Attn: Bill Scott/Russ Taylor Physics and Astronomy Department University of Calgary 2500 University Dr. NW, Calgary, Alberta, Canada T2N 1N4 ---The VSOG (VSOP Science Operations Group)--- email: vsog@vsop.isas.ac.jp S2 Scheduler: Jim Lovell (jlovell@vsop.isas.ac.jp) Tel: +81-427-51-3934 (8am to 6pm JST) Fax: +81-427-69-8949 Web: http://www.vsop.isas.ac.jp (Web site contains schedule information, experiment status details, HALCA calibration data and data reduction info.) Address: ISAS, 3-1-1 Yoshinodai, Sagamihara Kanagawa 229, Japan ---AIPS/Data Reduction--- VSOP Data Reduction Exploder (VDR): vdr@aoc.nrao.edu -- for general help and exchange of information regarding VSOP data reduction. 'Designated AIP': daip@aoc.nrao.edu -- for reporting bugs in AIPS. ! ! Start of Formatted entries for input to AIPS' INDXR. ! These epochs are times across which fringe fitting should not be done. ! They include all tracking station handovers and clock setting events. ! SUBARRAY = 1 / 324 20:36:58.930 324 22:17:28.930 324 22:17:38.930 324 22:17:48.930 324 22:17:58.930 324 22:30:18.930 324 22:30:53.230 324 23:13:45.230 324 23:13:55.230 / __ * David Del Rizzo / \ * S2 Correlator Operator / \ VSOP Project || _ | || / | Dominion Radio Astrophysical Observatory /\\ / P.O. Box 248, / |\\__/ Penticton, B.C., V2A 6K3 | | Dave.DelRizzo@hia.nrc.ca