From Dave.DelRizzo@hia.nrc.ca Sat Jul 24 03:29:36 1999 Return-Path: Received: from perseus.vsop.isas.ac.jp (vsop.isas.ac.jp) by orihime.isaslan1.isas.ac.jp (4.1/SMI-4.1) id AA16514; Sat, 24 Jul 99 03:29:35 JST Received: from virgo.drao.nrc.ca (virgo.drao.nrc.ca [192.139.21.66]) by perseus.vsop.isas.ac.jp (8.8.5+2.7Wbeta5/3.5Wpl7) with ESMTP id DAA06436 for ; Sat, 24 Jul 1999 03:29:34 +0900 (JST) Received: from hia.nrc.ca (vsop3.drao.nrc.ca [192.139.21.14]) by virgo.drao.nrc.ca (8.8.6/8.8.6/virgo.mc Revision: 1.12) with ESMTP id LAA37096; Fri, 23 Jul 1999 11:23:36 -0700 Message-Id: <3798B453.8759E71B@hia.nrc.ca> Date: Fri, 23 Jul 1999 11:28:35 -0700 From: David Del Rizzo Organization: DRAO/University of Calgary X-Mailer: Mozilla 4.51 [en] (WinNT; U) X-Accept-Language: en Mime-Version: 1.0 To: Bill Scott , VSOP Survey Operations Group Cc: John Reynolds , University of Tasmania VLBI Account , VLBI Friend , Deep Space Network , Kevin Miller , Glen Langston , Toney Minter , Dave Del Rizzo Subject: VS04m PI letter Content-Type: multipart/mixed; boundary="------------036CD689E5EDF158278F61FA" Status: RO This is a multi-part message in MIME format. --------------036CD689E5EDF158278F61FA Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Greetings, Please find attached a copy of the PI letter for experiment VS04m (May 14, 1999). Cheers, dave -- __ * David Del Rizzo / \ * S2 Correlator Operations / \ VSOP Project || _ | || / | Dominion Radio Astrophysical Observatory /\\ / P.O. Box 248, / |\\__/ Penticton, B.C., V2A 6K3 | | Dave.DelRizzo@hia.nrc.ca http://www.drao.nrc.ca/~delrizzo/Welcome.shtml --------------036CD689E5EDF158278F61FA Content-Type: text/plain; charset=us-ascii; name="VS04m.piletter" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="VS04m.piletter" ========================================================================== PI INFORMATION LETTER FROM PENTICTON S2 CORRELATOR FOR EXPERIMENT VS04m ========================================================================== PI: The VSOP Survey Program, Hirabayashi Lab. Address: Institute of Space and Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510 JAPAN Phone: 81-427-59-8340 EMAIL: vsog@vsop.isas.ac.jp Fax: 81-427-59-8340 Dear PI: This letter is to inform you of some of the details of the correlation and analysis of your experiment 'VS04m'. 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 DIFMAP. The data package that we are sending you contains this letter and the FITS data tape in the format requested in the VS04m.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: VS04m_DQA1.txt -- ASCII *summary* file of single baseline fringe search results. VS04m.dqa1 -- ASCII file of single baseline fringe search results. VS04m.ps -- postscript plot of experiment station playback times. VS04m_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. VS04m.log -- log file generated by the correlator. VS04m.comments -- comments extracted from station log files. VS04m.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: 'TDBIN_TS' 1999-134-21:00:00 --> 1999-134-21:38:40 'GBANK_TS' 1999-134-22:27:37 --> 1999-135-00:00:26 'GOLDS_TS' 1999-135-00:00:00 --> 1999-135-00:46:09 'TDBIN_TS' 1999-135-03:00:00 --> 1999-135-05:40:48 ...and periods of downlink loss are as follows: 134-21:28:35.810 -> 134-21:31:22.300 134-21:37:56.810 -> 134-22:29:37.000 134-22:30:11.230 -> 134-22:30:17.220 134-23:59:50.630 -> 135-00:07:10.000 135-00:08:35.810 -> 135-00:17:57.900 135-00:32:23.810 -> 135-00:32:25.900 135-00:39:53.810 -> 135-03:26:15.000 135-03:31:24.810 -> 135-03:31:30.400 135-03:38:31.810 -> 135-03:54:42.400 135-04:04:50.810 -> 135-04:10:54.300 135-04:26:28.810 -> 135-04:26:59.300 135-04:33:21.810 -> 135-04:41:08.300 135-04:51:44.810 -> 135-05:09:28.300 135-05:16:37.810 -> 135-05:16:54.300 135-05:30:22.810 -> 135-05:31:35.300 You will have approximately 3 weeks from today (Fri Jul 23 10:21:23 PDT 1999) 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: ================================= - Ceduna GRT did not participate in this observation. - Hobart GRT reports telescope did not return to source after 02:14 on DOY 135. Calibrator data from Hobart (source = 2255-282) were recorded with user data valid set to 'no' on tape, thus no calibrator data was correlated (Mopra did not observe the calibrator). - While HartRAO data registered as 'valid' on the S2 console, the correlator read user data valid as 'no' for most of the correlation. This may have resulted in the HartRAO data being flagged as 'possibly bad'. These data should be flagged as 'good'. - Space fringes detected by DQA1 software during the two Tid TS passes (tracking passes #1 and #4) despite low %DV values reported by the DSN. Pass #4 was scheduled to be ~2 hours, however due to no overlapping GRT observations, only 10 minutes of spacecraft data were correlated during this pass. - No space fringes detected during passes #2 (Green Bank) or #3 (Goldstone). These passes were both extensively searched (+/-1 and +/-2 second offsets with a large delay window was used). The data were correlated with a -2.2us offset (consistent with the delay in spacecraft data from Tid TS). Further processing may reveal fringes during these passes. - A large number of phase cal jumps were detected during the Goldstone tracking pass. DSN reports 3 clock setting events during this pass. Your FITS tape(s) incl: 4 FITS files, 308298240 bytes total Participating GRTS: MP, HO, HH ================== POINTS OF CONTACT: ================== ---Correlator--- Operations email: vlbiop@hia.nrc.ca Operations Manager (Sean Dougherty): Sean.Dougherty@hia.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: Ian Avruch (avruch@halca.vsop.isas.ac.jp) Tel: +81-427-59-8346 (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 / 134 21:28:35.810 134 21:37:56.810 134 22:30:11.230 134 23:59:50.630 135 00:08:35.810 135 00:32:23.810 135 00:39:53.810 135 03:31:24.810 135 03:38:31.810 135 04:04:50.810 135 04:26:28.810 135 04:33:21.810 135 04:51:44.810 135 05:16:37.810 135 05:30:22.810 / --------------036CD689E5EDF158278F61FA--