From: <Chris.Phillips_at_email.protected>
Date: Mon, 27 Apr 2009 10:15:46 +1000

Hi all,

Alessandra has prepared a report of v271b, which was correlated at
Bonn. Could people responsible for the various telescopes please read
the relevant sections. Particularly ATCA and Ceduna. If you have
further questions, you really need to contact Alessandra directly.

Cheers
Chris

Begin forwarded message:

>From: Alessandra Bertarini <abertari_at_mpifr-bonn.<!--nospam-->mpg.de>
>Date: 24 April 2009 8:32:44 PM
>To: Leonid Petrov <Leonid.Petrov_at_lpetrov.<!--nospam-->net>, "Phillips, Chris
>(ATNF, Marsfield)" <Chris.Phillips_at_csiro.<!--nospam-->au>
>Subject: V271BR
>
>Ho Leonid & Chris,
>
>by this afternoon I will have the the tar file ready for download.
>(Unfortunately at 15:00 CET the computers in MPI will be all shut
>down and
>will remain so for the whole weekend - working on the cooling system).
>Next week I will be in Haystack, I will try to read e-mail, but it
>will
>not be on a regular base.
>
>The file is:
>ftp://ftp.mpifr-bonn.mpg.de/outgoing/geodesy/Leonid/2008_11_28_V271BR_mk4.tar.bz2
>
>I will create the FIT file when I am back from Haystack.
>The LCP correlation will also start then: I still have to prepare the
>files and after 15:00 CET also the correlator will be shut down.
>
>Chris, I am quite sure that ATCA has problem with the LO (see note
>below
>and plot in attchment). If this in known, fine, if not, up to you to
>report this to ATCA.
>
>Tib problems have already been reported to Shinji.
>
>Cheers,
>Alessandra
>
>**************************************************
>This are some notes about the expriment:
>
>ATCA: No detections from No0016 to No0039: some of these scans
>are recognized by fourfit as valid (expecially for the
>baseline
>to Hobart), but they are garbage: the power spectrum is
>garbage.
>No detection from No0340 to No0345 ( some scans are recognised
>valid by fourfit, but, as for above are garbage).
>Visibility phases vs time unstable: one of the LOs break the
>lock (when the effect is visible, it is present in all BBCs)
>and
>relock at a different phase. Without phase cal data I cannot
>check
>further this theory (see plot in attachment).
>Early scan stops : ~4 AP
>
>
>MOPRA: No detection from the beginning (No0001) to No0017.
>Scan No0189 unusable: just 2 APs present.
>Visibility phases vs time unstable.
>
>CEDUNA: Visibility phases vs time unstable.
>
>PARKES: No detections between No0328 to No0357
>Visibility phases vs time unstable.
>Occasionally late on source (~10 scans).
>Early stop in less than 10 scans (wind??).
>
>HOBART: Ok.
>
>TIB : BBCs tuning was not always correct.
>From scan No0060 to No0082 BBC01, BBC03, BBC05 and
>BBC07 removed( due to mistuning).
>Occasionally one BBC had to be removed due to mistuning
>(~ 10 scans).
>Early stop in less than 10 scans.
>
>The late starts/ early stop have been dealt with. The missing Tib
>channels
>also
>have been flagged during fringe fitting. But some bad scans might have
>been
>forgotten.
>
>Closure quantities checked: Ok.
>SBD and DR: Ok.
>Polarization present: RCP
>
>Summary of the data quality:
>Qcod 0 1 2 3 4 5 6 7 8 9 A B C D E F G H N - Tot
>--------------------------------------------------------------------
>AC:X 47 0 0 0 0 2 3 46 184 147 0 0 0 0 0 0 0 0 3 0 432
>AM:X 63 0 0 0 0 1 4 15 66 270 0 0 0 0 2 0 1 0 10 0 432
>AP:X 60 0 0 0 0 6 15 20 151 176 0 1 0 0 0 0 0 0 3 0 432
>AH:X 33 0 0 0 0 0 0 3 26 357 0 0 0 0 3 0 0 0 10 0 432
>AT:X 7 0 0 0 0 1 0 2 35 70 0 0 0 0 0 0 0 0 2 315 432
>CM:X 50 0 0 0 1 6 11 77 154 119 0 0 0 0 0 0 4 0 10 0 432
>CP:X 39 0 0 0 0 6 24 69 203 88 0 0 0 0 0 0 0 0 3 0 432
>CH:X 28 0 0 0 0 0 3 21 119 258 0 0 0 0 0 0 0 0 3 0 432
>CT:X 10 0 0 0 1 1 3 25 42 34 0 0 0 0 0 0 0 0 1 315 432
>MP:X 53 0 0 0 0 15 20 39 144 149 0 0 0 0 1 0 0 0 11 0 432
>MH:X 48 0 0 0 0 0 2 5 39 328 0 0 0 0 0 0 0 0 10 0 432
>MT:X 10 0 0 0 0 2 5 11 25 63 0 0 0 0 0 0 0 0 1 315 432
>PH:X 41 0 0 0 0 2 1 9 79 298 0 0 0 0 0 0 2 0 0 0 432
>PT:X 5 0 0 0 0 1 2 4 43 61 0 0 0 0 0 0 0 0 1 315 432
>HT:X 9 0 0 0 0 0 0 0 20 87 0 0 0 0 0 0 0 0 1 315 432
>--------------------------------------------------------------------
>Tot 503 0 0 0 2 43 93 346 1330 2505 0 1 0 0 6 0 7 0 69 1575 6480
>
>Legend:
>QC = 0 Fringes not detected.
>= 1-9 Fringes detected, no error condition. Higher number = better
>quality.
>= B Interpolation error in fourfit.
>= D No data in one or more frequency channels.
>= E Maximum fringe amplitude at edge of SBD, MBD, or rate
>window.
>= F "Fork" problem in processing.
>= G Fringe amp in a channel is <.5 times mean amp (only if
>SNR>20).
>= H Low Phase-cal amplitude in one or more channels.
>= N No valid correlator data.
>Tot Total number of scans in schedule.
>Minus Scans in original schedule file for which correlation was
>not
>attempted, usually because of known station problems.
>
>
>
>***********************************************************************
>* Geodesy VLBI
>Group *
>* Alessandra Bertarini Auf dem Huegel
>69 *
>* 53121 Bonn
>(D) *
>* VLBI-Correlator Ph. +49-228-525429 ** Fax
>+49-228-525229 *
>* e-mail: abertari_at_mpifr-
>bonn.mpg.de *
>
>***********************************************************************
>
>Please avoid sending me Word or PowerPoint attachments.
>See http://www.gnu.org/philosophy/no-word-attachments.html

------------------------------------------------------------
Chris Phillips
CSIRO ATNF eVLBI project scientist
Office: (+61) (0)2 93724608 Mobile: (+61) (0)439487601

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Received on 2009-04-27 10:16:25