The correlation for GC029 was done in 17 separate passes, eight for each
of the two field centers, plus an additional one for an EVN-only array.
The underlying schedule of the main 16 passes is v.2, the one used by
the VLBA stations plus GBT.  Because the EVN stations observed using the
older v.1 of the schedule, these six stations have only a subset of time
in common with the VLBA stations.  The EVN-only 17th pass was run based
on the older v.1 of the schedule as observed by the EVN stations, providing
a means to compute SN-table solutions for all calibrator sources as observed
by the EVN stations.


For the main 16 passes, the following naming convention and plot descriptions
apply:

  gc029.f{m}sb{n}-weight.ps.gz              station weight vs. time 
  gc029.f{m}sb{n}-auto-[1,2].ps.gz          station auto-corr. real vs. freq
  gc029.f{m}sb{n}-cross-[1,2][a,p].ps.gz    baseline amp & phase vs. freq
  gc029.f{m}sb{n}-ampphase-1[a,p].ps.gz     baseline amp & phase vs time

{m} corresponds to the correlation center:
   1 = J123700+620909
   2 = J123721+621129
{n} corresponds to the 0-based subband number (0,1,...7), one less than
  the 1-based AIPS IF number

The plots vs time (weight, ampphase) collectively show the whole time-range
   of the experiment.
The plots vs. freq show 1min of data from the scan of J0927+3902 [1] or
    a scan of 3C345 [2].
In the baseline  plots, the 'a' or 'p' denotes an amp or a phase plot.
The cover letter delves more deeply into the details of the specific plots.


(a) WEIGHT plots - plots each 0.25s integration as a separate ".".
Polarization color coding:  Red=RCP, Blue=LCP (the same for each of
the different kinds of plots).


(b) AUTOCORRELATION SPECTRA plot - shows real vs. freq for each station.
The y-axis range in each plot self-scales independently, and  may not 
necessarily go down to 0.  
 

(c) BASELINE SPECTRA plot - shows (separately) amp and phase vs frequency
for all Gb-* baselines, vector averaged in time over the annotated 1-minute 
interval.  The y-axis range in each amplitude plot self-scales independently.
Phase plots all show +/- 200 degrees.
     

(d) AMP/PHASE(t) plot - shows (separately) amp and phase on all Gb-* baselines, 
over the whole experiment (but omitting scans of the target source).
Each 0.25s integration is plotted as a separate ".".   The frequency points
are vector averaged over the middle 80% of the band.  



For the 17th EVN-only pass, the following naming convention and plot 
descriptions apply:

  gc029.evn-weight.ps.gz              station weight vs. time 
  gc029.evn-auto-[1,2].ps.gz          station auto-corr. real vs. freq
  gc029.evn-cross-[1,2][a,p].ps.gz    baseline amp & phase vs. freq
  gc029.evn-ampphase-1[a,p].ps.gz     baseline amp & phase vs time

Where the time ranges of data shown in the auto and cross plots is the same as
in the other plots.  Difference in individual types of plots include:

(a) WEIGHT: all 8 IFs and 2 pols are plotted simultaneously.  The color 
coding is:

   IF1/RR = red    IF1/LL = blue      IF2/RR = cyan        IF2/LL = green
   IF3/RR = pink   IF3/LL = med.grey  IF4/RR = brown       IF4/LL = purple 
   IF5/RR = teal   IF5/LL = yellow    IF6/RR = steel blue  IF6/LL = lt.grey
   IF7/RR = black  IF7/LL = orange    IF8/RR = lt.green    IF8/LL = lt.purple

with "higher-IF" colors overplotting "lower-IF" ones.

(b) AUTOCORRELATION SPECTRA:  each IF for the stations is shown in a separate
plot, that also scales separately.  This keeps bad RFI in a single IF from
throwing off the dynamic range in the plot for the other IFs.

(c) BASELINE SPECTRA:  The reference staion becomes Ef.

(d) AMP/PHASE(t): only the first two IFs are shown; this is where all the
stations have signals.  This makes the phase(t) plot especially more useful.
The color coding for these first two IFs is as in the first line of the
weight-plot color key.