%    start time	      end time	      duration	      low freq	     high freq	
        590.860	        590.864	          0.004	      20814.359	      42827.694	
        590.910	        590.914	          0.004	      19655.763	      41751.854	
        590.954	        590.959	          0.004	      20400.575	      43406.992	
        590.990	        590.995	          0.004	      11214.559	      43820.777	
        591.023	        591.027	          0.004	      16014.459	      42579.423	
        591.048	        591.053	          0.005	      19986.791	      43986.291	
        591.072	        591.076	          0.004	      20152.304	      41255.313	
        591.095	        591.099	          0.004	      18414.409	      39931.203	
        591.116	        591.120	          0.004	      20235.061	      38276.065	
        591.136	        591.140	          0.004	      19159.222	      39351.904	
        591.156	        591.161	          0.005	      19407.492	      39517.418