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File description:
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--File:                   /data2/a_envoyer/2021/05/20210522_052109_extract2.dat
--File size:               579.86 Mo
--size of the Header:     12324    octets
--data:                   Spectrum
--start time:             2021-05-22 05:21:09.146217
--stop  time:             2021-05-22 05:21:41.526247
--duration (min):               0.53966716
--dt (msec):                  2.621440
--accumulation:           8       
--number of channels:     4       
--number of cubes:        12353   
--number of frequencies:  3072    
--central freq (MHz):      10.94
--freq echantillon (MHz): 200.00
--Bandwidth (MHz):          9.37
--first frequency (MHz):    6.25
--last frequency (MHz):    15.62