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File description:
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--File:                   /data2/a_envoyer/2021/02/20210222_083933_extract2.dat
--File size:               18.55 Go
--size of the Header:     20516    octets
--data:                   Spectrum
--start time:             2021-02-22 08:39:33.845074
--stop  time:             2021-02-22 08:50:10.676703
--duration (min):                10.613860
--dt (msec):                  2.621440
--accumulation:           8       
--number of channels:     4       
--number of cubes:        242933  
--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