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File description:
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--File:                   /data2/a_envoyer/2021/05/20210516_023001_extract2.dat
--File size:               94.32 Go
--size of the Header:     20516    octets
--data:                   Spectrum
--start time:             2021-05-16 02:30:01.390484
--stop  time:             2021-05-16 03:23:59.521623
--duration (min):                53.968852
--dt (msec):                  2.621440
--accumulation:           8       
--number of channels:     4       
--number of cubes:        1235250 
--number of frequencies:  5120    
--central freq (MHz):      14.06
--freq echantillon (MHz): 200.00
--Bandwidth (MHz):         15.62
--first frequency (MHz):    6.25
--last frequency (MHz):    21.87