@Override public boolean reset(){
  try {
    FitsUtil.reposition(this.input,this.fileOffset);
    return true;
  }
 catch (  Exception e) {
    LOG.log(Level.WARNING,"Exception while repositioning " + input,e);
    return false;
  }
}

@ Override public boolean reset ( ) { try { FitsUtil . reposition ( this . input , this . fileOffset ) ; return true ; } catch ( Exception e ) { LOG . log ( Level . WARNING , "Exception while repositioning " + input , e ) ; return false ; } }
reset the file pointer to the beginning of the header
