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File description:
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--File:                   /data2/a_envoyer/2021/11/20211103_160228_extract2.dat
--File size:               295.27 Go
--size of the Header:     28708    octets
--data:                   Spectrum
--start time:             2021-11-03 16:02:28.540118
--stop  time:             2021-11-03 18:03:11.162029
--duration (min):                120.71037
--dt (msec):                  2.621440
--accumulation:           8       
--number of channels:     4       
--number of cubes:        2762842 
--number of frequencies:  7168    
--central freq (MHz):      17.19
--freq echantillon (MHz): 200.00
--Bandwidth (MHz):         21.87
--first frequency (MHz):    6.25
--last frequency (MHz):    28.12