EVN Network Monitoring Experiment (NME) Pipeline Feedback


Pipeline feedback for experiment N04C3. If you have any comments on this experiment please email the address below.
A detailed description of the pipeline output is available.

Last updated: Mon Dec 13 13:26:17 CET 2004 zparagi@jive.nl

General Comments. ( Brief data summary and scan listing )
C-band NME observed on 28 Oct. 2005 (session 3/2004). This experiment was recorded at 256 Mbps using 2-bit sampling (256-8-2) which resulted in 4x8MHz channels per polarization. All stations produced fringes. Urumqi did not send the disk because of shortage of recording media during the session. Jodrell Bank and Shanghai swapped polarizations (had been fixed prior to correlation). Noto used the Rubidium maser, which turned out to be unstable. Phases may be recovered better by fringe-fitting the data with a solution interval of less than 30s. Also BBC#1 was unlocked - this problem was realised in the ftp test during this experiment and was quickly fixed.

The main targets, 3C273B and 1222+037 were observed in short cycles. OQ208 was used for checking the polarization leakages. The first three scans of the experiment were not correlated.

The ratio of the expected to the observed number of good visibilities is estimated as ERI = ERI* = 0.91 (Ef=0.96, Jb=1.0, Mc=0.94, On=1.0, Wb=0.92, Tr=1.0, Nt=0.75, Ur=1.0, Sh=0.5/0.5 (sources set early), Hh=1.0).

Plots of the autocorrelations .
Comments.

Plots of the uncalibrated amplitude and phase against time .
Comments.
Nt: unstable phases; shows only noise because of the 30s plot averaging time applied.

Plots of the uncalibrated amplitude and phase against frequency channel .
Comments.
Nt: BBC#1 unlocked.

The uncalibrated amplitude and phase of the crosshand correlations against frequency channel .
Comments.

TSYS against time .
Comments.

Telescope sensitivities from the a priori TSYS and Gain curves (the square of this number gives the antenna noise (SEFD) in Jy - the smaller the better).
Comments.
Tr: the DPFU values provided by the station were bad (the polynomials seemed to be OK). New DPFUs were estimated based on a previous pipeline imaging run. These are 0.0588 (RCP), and 0.0537 (LCP).
Nt: less sensitive than expected. See the EVN Status Table.

Fringe-fit phase solutions (including Parallactic Angle correction).
Comments.

Fringe-fit delay solutions .
Comments.

Fringe-fit rate solutions .
Comments.
Nt: Rubidium maser was used. Rates are not high, but the solutions are rather noisy. Decided not to use shorter solution intervals in FRING because that would have resulted in lower SNR for the long baselines.

Telescope bandpasses .
Comments.

Calibrated amplitude and phase against time (a priori amplitude calibration and fringe-fit solutions applied).
Comments.
Nt: flagged prior to imaging.

Calibrated amplitude and phase against frequency channel .
Comments.

Naturally weighted dirty map produced before self-cal of:
3C273B: postscript , or FITS .
1222+037: postscript , or FITS .
OQ208: postscript , or FITS .
Comments.

Uniformly weighted dirty map produced before self-cal of:
3C273B: postscript , or FITS .
1222+037: postscript , or FITS .
OQ208: postscript , or FITS .
Comments.

Phase corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
3C273B.
1222+037.
OQ208.
Comments.

Amplitude corrections applied to a priori calibrated and fringe-fitted data by self-calibration.
3C273B: postscript , or text file .
1222+037: postscript , or text file .
OQ208: postscript , or text file .
Comments.

Telescope sensitivities (the total AMP gain applied during both a priori and self calibration; the square of this number gives the antenna noise (SEFD) in Jy).
Comments.
Compare these values with the nominal SEFDs in the EVN Status Table).

Residual closure phase (visibility closure phase with model closure phase subtracted) for:
3C273B .
1222+037 .
OQ208 .
Comments.

Calibrated visibilities and the source model of:
3C273B .
1222+037 .
OQ208 .
Comments.

Calibrated visibilities against u,v distance for:
3C273B. postscript , or png (smaller)
1222+037. postscript , or png (smaller)
OQ208. postscript , or png (smaller)
Comments.

u,v coverage for:
3C273B. postscript , or png (smaller)
1222+037. postscript , or png (smaller)
OQ208. postscript , or png (smaller)
Comments.

3C273B: postscript , or FITS .
1222+037: postscript , or FITS .
OQ208: postscript , or FITS .
Comments.