The output format of GCX can be converted to a more common tabular form using the -T option. This option uses the value of the .file.tab_format option (File and Device Options/Report converter output format) to specify it's output format. The text below, taken from the on-line help, describes this option.
Report Converter Format String The report converter option converts the native gcx output to a fixed-width tabular format that is easy to import in other programs for further processing. The table's format is defined by an option string. The option string consists of tokens separated by spaces. There are two types of tokens: option tokens, and column tokens. Options tokens set global table options when present. They can appear anywhere in the format string. tablehead Generate a table header line containing the column titles collist Generate a list of columns with position information at the start of the output res_stats Generate a line with descriptive statistics on the stars' residuals at the end of each frame.Column tokens specify what information gets output in each column. The first column token corresponds to the first output column, and so on in order. Each column token can optionally be followed by a specifier of the form: width.precision. The width excludes a single character spacer between the columns. Supported colum tokens are: name [w] Output the star's designator ra [w] Output the right ascension in h:m:s format dra [w.p] Output the right ascension in decimal degrees format dec [w] Output the declination in d:m:s format ddec [w.p] Output the declination in decimal degrees format smag [w.p] "<band>" Output the standard magnitude with the given name serr [w.p] "<band>" Output the error of the standard magnitude with the given name imag [w.p] "<band>" Output the instrumental magnitude with the given name ierr [w.p] "<band>" Output the error of the instrumental magnitude with the given name flags [w] Output reduction flags and the star type observation [w] Output the name of the observation (a synthetic name that can be used to group stars reduced from the same frame airmass [w.p] Output the airmass of the observation jdate [w.p] Output the Julian date of the observation mjd [w.p] Output the modified Julian date of the observation filter [w] Output the filter name used for the observation xc/yc [w.p] Output the frame coordintes of the star's centroid xerr/yerr [w.p] Output the estimated centroiding errors dx/dy [w.p] Output the amount the star was moved from it's catalog position when the measuring aperture was centered residual [w.p] Output the star's residual in the ensemble solution stderr [w.p] Output the star's standard error (residual divided by the estimated error Fields for which data is not available are left blank When converting recipies to AAVSO database format, some fields are obtained from the recipe and star comments. Tokens of the form <token>=<value> are searched for. The value is taken for the database field, with underscores and minus signs converted to spaces. The following tokens are used: Chart comment tokens: d AAVSO (Harward) designation of the main var on the chart s Original chart scale t Latest chart date (MM/YY, YYYY or YYMMDD) n Name of the main variable on the chart w Who converted the chart p Sequence source Star comment tokens: p Position source c Comments n Name of variable star i Id of star on chart (if different from v(aavso))