typedef struct pix_head_struct_4 {
   short int len;              /* bit 0-10: length, bit 11-14: bits */
   unsigned short int len_prev;/* bit 0-10: length previous, bit 11_15: type */
   double tim;      /* line of day (1.line upper system) */
   unsigned short int eq_diam; /* diameter [ 0.01mm] */
   short int up_lins;          /* number of lines upper system */
   short int lo_up_lins;     /* low - up lines */
   short int diff_lins;        /* difference of line counters at bottom */       
   short int min_up;           /* smallest pixel number upper */       
   short int min_lo;           /* smallest pixel number lower*/       
   unsigned short int y_scal;           /* 0.1 um */       
   unsigned short int x_scale_up;       /* 0.1 um */       
   unsigned short int x_scale_lo;       /* 0.1 um */       
   } pix_head_4;
#define SIZE_PIXH_4 30



typedef struct pix_head_struct_3 {
   short int len;              /* bit 0-10: length, bit 11-14: bits */
   unsigned short int len_prev;/* bit 0-10: length previous, bit 11_15: type */
   unsigned long int tim;      /* line of day (1.line upper system) */
   unsigned short int eq_diam; /* diameter [ 0.01mm] */
   short int up_lins;          /* number of lines upper system */
   short int lo_up_lins;     /* low - up lines */
   short int diff_lins;        /* difference of line counters at bottom */
   short int min_up;           /* smallest pixel number upper */
   short int min_lo;           /* smallest pixel number lower*/
   unsigned short int y_scal;           /* 0.1 um */
   unsigned short int x_scale_up;       /* 0.1 um */
   unsigned short int x_scale_lo;       /* 0.1 um */
   } pix_head_3;
#define SIZE_PIXH_3 26



typedef struct pix_head_struct_o {
   short int len;              /* bit 0-10: length, bit 11-14: bits */
   unsigned short int len_prev;/* bit 0-10: length previous, bit 11_15: type */
   unsigned long int tim;      /* line of day (1.line upper system) */
   unsigned short int eq_diam; /* diameter [ 0.01mm] */
   short int up_lins;          /* number of lines upper system */
   signed char lo_up_lins;     /* low - up lines */
   signed char linefeed;                /* 1=lf, 0=no lf */
   short int diff_lins;        /* difference of line counters at bottom */
   short int min_up;           /* smallest pixel number upper */
   short int min_lo;           /* smallest pixel number lower*/
   unsigned short int x_scale_up;       /* 0.1 um */
   unsigned short int x_scale_lo;       /* 0.1 um */
   } pix_head_o;
#define SIZE_PIXH_O 24



typedef struct quarter_struct {
   short int indic;                  /* fixed indicator for quarter header */
	short int len_prev;
   time_t timeinfo;                  /* full time info */
   time_t lastsync;                  /* full time info of last sync */
   short int spare0;
   short int spare1;
   short int spare2;
   short int spare3;
   unsigned long checksum;
   } quarter;
#define SIZE_QUART 24



typedef struct main_head_struct {
   short int indic;                  /* length of struct * -1 */
	short int len_prev;
   char pix_name[14];
   time_t main_time;
   double line_frequ;
   float HBL;
   float HBR;
   float HFR;
   short int mid_pix;
   short int gate1;
   short int gate2;
   float XSCALE0_1;
   float XSCALE0_2;
   float L0_1;
   float L0_2;
   short int oeu_nr;
   short int format;
   short int dat_gen;
   short int dat_rev;
   short int frt;
   } main_head;
#define SIZE_MAINH_4 74



typedef struct main_head_struct_3 {
   short int indic;                  /* length of struct * -1 */
	short int len_prev;
   char pix_name[14];
   time_t main_time;
   double line_frequ;
   float HBL;
   float HBR;
   float HFR;
   short int gate1;
   short int gate2;
   float XSCALE0_1;
   float XSCALE0_2;
   float L0_1;
   float L0_2;
   short int oeu_nr;
   short int format;
   short int dat_gen;
   short int dat_rev;
   short int frt;
   } main_head_3;
#define SIZE_MAINH_3 72



typedef struct main_head_struct_o {
   short int indic;                  /* length of struct * -1 */
	short int len_prev;
   char pix_name[14];
   time_t main_time;
   double line_frequ;
   float DELTA_H;
   short int gate1;
   short int gate2;
   float XSCALE0_1;
   float XSCALE0_2;
   float L0_1;
   float L0_2;
   short int oeu_nr;
   short int format;
   short int dat_gen;
   short int dat_rev;
   short int frt;
   } main_head_o;
#define SIZE_MAINH_O 64