/* Data store external as defined pg. 108 in spec.  v. 10/29/97 */
struct external {
  short a_counter[3];
  short ae_cmd[3];
  unsigned short ar_counter;
  char  chute_released;
  long  frame_counter;
  unsigned short g_counter[3];
  short packet[256];
  short re_cmd;
  short ss_temp;
  short subframe_counter;
  unsigned short td_counter;
  short tdlr_counter[4];
  short thermo_temp;
};