YAGI(5) 							File Formats Manual							   YAGI(5)

NAME

       yagi - yagi binary output format

DESCRIPTION

       This  manual  page describes the output format of the file created by the Yagi-Uda project's yagi program. The file is a binary file with a
       header of 100 bytes. The header consists of:

       offset(bytes)		  information	       data-type

       0			  elements	       int
       4			  driven	       int
       8			  parasitic	       int
       12			  min_frequency        double
       20			  max_frequency        double
       28			  design frequency     double
       36			  step_frequency       double
       44			  angular_step	       double
       52			  0		       double
       92			  0		       double

       Following the header, there starts the coordinates(x,y,l) of each
       element and the voltage applied to each element. Then we write
       the element currents one after the other, at each frequency.
       Hence the element currents will be written 12,000 times with a
       3 element yagi analysed at 4,000 different frequencies. All complex
       data is stored in a structure of type fcomplex, defined as:

       struct fcomplex {double real, double imaginary};

       offset(bytes)		  information	       data-type

       100			  x1		       double /* coordinates */
       108			  y1		       double
       116			  l1		       double
       100+(n-1)*24		  x_n		       double
       100+(n-1)*24+8		  y_n		       double
       100+(n-1)*24+16		  l_n		       double
       --------------  Repeated for each element.
       100+24*elements		  Voltage1	       fcomplex  /* voltage */
       100+24*elements+(n-1)*16   Voltage_n	       fcomplex
       --------------  Repeated for each element n at each frequency step f.
       100+40*elements		  Current1@f1	       fcomplex /* current */
       100+40*elements+(n-1)*16   Current_n@f1	       fcomplex

       100+56*elements		  Current@f2	       fcomplex
       100+40*elements+(n-1)*16   Current_n@f2	       fcomplex

FILES

	    filename.out			binary file

SEE ALSO

       yagi(1), output(1), input(1), optimise(1), first(1) and input(5).

AUTHORS

       Dr. David Kirkby G8WRB (david.kirkby@onetel.net), with help with converting to DOS from Dr. Joe Mack NA3T (mack@fcrfv2.ncifcrf.gov).

Yagi version 1.16						 24th October 2000							   YAGI(5)