You can actually fiddle with *any* visibility dataset, so the units could be K, Jy, Jy/K, or sqrt(Jy/K), depending on the origin of the dataset, although the reported units may not always come out as you think.
Gains can be either antenna based or baseline based.
By default, the single sideband data are displayed. One can optionally run in double sideband mode (i.e. phase differences and amplitude ratios) by using the dsb option (see below). GMAKE, when run to compute the double sideband solution, puts the single sideband solutions (ssb) in the first two wide channels and the double sideband solutions (dsb) in the third and fourth channels. If the dsb solutions are not present and dsb mode is still requested, then then ssb data will be used to compute the dsb data.
Commands in cursor mode are:
d -- delete the nearest point (i.e. flag bad). a -- add the nearest deleted point (i.e. flag good). x -- zoom/unzoom toggle on the current column. y -- zoom/unzoom toggle on the current row. z -- zoom/unzoom toggle on the current plot. b -- insert a breakpoint. c -- delete the nearest breakpoint. m -- switch between DSB/SSB mode (see note with ssb option below). 0-9 -- order of the polynomial fit/number of spline nodes. t -- toggle between polynomial and cubic spline fits. f -- two-point fit (simple linear interpolation). l -- toggle between single/all baselines (see link option below). i -- info on the nearest (good) data point. r -- redraw the screen (also rescales the axes). + -- advance to the next page (if multiple pages). - -- backup to the previous page (if multiple pages). <> -- shift left (right) one panel (only in zoom mode). v^ -- shift down (up) one panel (only in zoom mode). ?,h -- this help. q -- quit (no saving). e -- exit (save flags, breakpoints, and fits, if modified). . Toggle DEBUG mode.
NOTE: there is no confirmation on 'q' or 'e'.
poly,<amp_poly_order>,<phase_poly_order> 2pt spline,<#_of_spline_nodes>The amp and phase polynomial orders must be in the range [0, 9]. Omitting the phase polynomial order defaults to order 2; omitting the amplitude order defaults to order 0. The number of spline nodes must be in the range [0, 9] (the actual number of spline nodes is one larger). The default for the spline fit argument is 0 (i.e. 1 node). The 2pt fit simply connects the dots; there are no additional parameters to this fit. By default, no initial fit is applied. However, the fit values are initialized to 1 for amplitudes and 0 for phases.
to the corresponding points on other baselines. Similarly, with breakpoints. Note that unflagging and clearing of breakpoints cannot be done in this mode. The interactive counterpart (key l) allows the user to switch this mode interactively.nowrap Do not attempt to unwrap phases. sources If no break point information is present in the input
uv dataset, the program will automatically set break points. Focus changes always create a break point. Source name changes will also create a break point but only if this option is used.nobreak Do not set breakpoint on reading the data. By default
it will.dsb By default, the single sideband data are displayed.
If this option is present, then the plots and fits will be done in double sideband mode (i.e. phase differences and amplitude ratios). Note that this option controls which of the windows permits editing. The interactive counterpart (key m) permits viewing of the other window, but no editing.new In batch mode an existing batch file will normally be
processed in a special append mode: first the existing commands are read and applied, then new commands will be added to the batch file. options=new will overwrite the batch file and start from scratch.debug Debugging mode. A lot of output to aid in providing
the programmer with relevant info. The '.' command can be used as a debug toggle in interactive mode.
COLORS: If the graphic device selected is capable of drawing with various colors, then the following list will identify their meanings:
BLUE: Fits drawn in blue indicate that no output uv dataset name was provided. GREEN: If a valid output dataset is provided, then new fits will be drawn in green. YELLOW: Yellow fits identify windows in which the fit is old for some reason. A new fit should be generated.