EVN Network Monitoring Experiment (NME) Pipeline Feedback
Last updated: Mon Nov 19 16:27:48 CET 2007
muehle@jive.nl
General Comments.
(
Brief data summary
and
scan listing
)
M band (6 GHz) network monitoring experiment, observed on 13 June 2007. The data rate was 128 Mbps (16 X 2 MHz subbands, dual polarization, two-bit sampling). The target source '1222+037' was calibrated using the phase-reference source '3C273B'. '3C273B' also served as the fringe finder.
9 stations participated. Effelsberg was set up to the wrong frequency, thus no useful data. Torun was out for about an hour due to a power failure at 16:51. Onsala reported bad weather (rain), but otherwise no known problems.
The EVN reliability indicator (ERI) for this experiment was
ERI = 0.68 . ERI* = 0.68 .
(Cm=1, Ef=0, Wb=1, Jb=1, On=1, Mc=1, Nt=1, Tr=0.52, Hh=1)
Plots of the autocorrelations
Comments.
RFI in Wb IF7(LL), On IF6(LL) and Mc IF7(RR); Cm IF8(RR) and IF8(LL) out due to bandwidth limitations; 128 pages
plots of the uncalibrated amplitude and phase
against time
Comments.
high fringe rate on Cm-Wb and Cm-Mc baselines; lost Tr at about 18:20; 64 pages
Plots of the uncalibrated amplitude and phase
against frequency channel
Comments.
Tr: unstable phases and low amplitudes from 18:19 (scan 60); 192 pages
The uncalibrated amplitude and phase of the crosshand
correlations against frequency channel
Comments.
nothing unexpected detected; 128 pages
TSYS against time
Comments.
nothing unexpected detected; 15 pages
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.
nothing unexpected detected; 13 pages
Fringe-fit phase solutions
(including Parallactic
Angle correction).
Comments.
Cm: fast rotation; 13 pages
Fringe-fit delay solutions
Comments.
nothing unexpected detected; 13 pages
Fringe-fit rate solutions
Comments.
nothing unexpected detected; 13 pages
Telescope bandpasses
Comments.
nothing unexpected detected; 2 pages
Calibrated amplitude and phase against time
(a
priori amplitude calibration and fringe-fit solutions applied).
Comments.
Cm-Wb, Cm-Mc: large deviations of the phase from zero; Mc-Tr(RR), Wb-Tr(RR): significant deviations of the phase from zero at 15:31-15:52; 64 pages
Calibrated amplitude and phase against frequency
channel
Comments.
The following IFs have consistently lower amplitudes than the other IFs: Wb: IF1(RR), IF2(RR); Mc: IF7(RR); Nt: IF7(RR), IF8(RR); Jb: IF3(LL), IF4(LL); Wb-Hh seems to resolve small-scale structure of calibrator; Tr: out 16:51 - 17:31, several IFs missing until 17:55; unstable phases and low amplitudes in all IFs starting at 18:18; 192 pages
Naturally weighted dirty map (not useful for bright sources)
produced before self-cal of:
3C273B: pdf (not available)
, or
FITS (not available)
.
1222+037:
pdf
, or
FITS
.
Comments.
Uniformly weighted dirty map (not useful for bright sources)
produced before self-cal of:
3C273B: pdf (not available)
, or
FITS (not available)
.
1222+037:
pdf
, or
FITS
.
Comments.
Phase corrections applied to a priori calibrated and
fringe-fitted data by self-calibration.
3C273B
.
1222+037 (not available)
.
Comments.
nothing unexpected detected; 13 pages
Amplitude corrections applied to a priori calibrated and
fringe-fitted data by self-calibration.
3C273B:
pdf
, or
text file
, or
statistical summary
.
1222+037: pdf (not available)
, or
text file (not available)
, or
statistical summary (not available)
.
Comments.
nothing unexpected detected; 13 pages
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.
IF8(RR) and IF8(LL) have in general less solutions and more jumps; Cm: steep rise by ~40 at 16:40; a few jumps (>10) in Cm, Wb and Nt; 13 pages
Residual closure phase (visibility closure phase with model closure phase subtracted) for:
3C273B
.
1222+037 (not available)
.
Comments.
nothing unexpected detected; some residual source structure, in particular small-scale structure; 12 pages
Calibrated visibilities and the source model of:
3C273B
.
1222+037 (not available)
.
Comments.
observed phases a bit unstable in IF8(LL); Cm: jump in amplitude at 16:40 (see also telescope sensitivity); 64 pages
Calibrated visibilities against u,v distance for:
3C273B:
pdf
, or
png
.
1222+037:
pdf
, or
png
.
Comments.
u,v coverage for:
3C273B:
pdf
, or
png
.
1222+037:
pdf
, or
png
.
Comments.
Crude maps of sources:
3C273B:
pdf
, or
FITS
.
1222+037:
pdf
, or
FITS
.
Comments.