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File description:
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--File:                   /data2/a_envoyer/2020/06/20200619_042104_extract2.dat
--File size:               4.02 Go
--size of the Header:     32804    octets
--data:                   Spectrum
--start time:             2020-06-19 04:21:04.845228
--stop  time:             2020-06-19 04:22:31.192819
--duration (min):                1.4391265
--dt (msec):                  2.621440
--accumulation:           8       
--number of channels:     4       
--number of cubes:        32940   
--number of frequencies:  8192    
--central freq (MHz):      18.75
--freq echantillon (MHz): 200.00
--Bandwidth (MHz):         25.00
--first frequency (MHz):    6.25
--last frequency (MHz):    31.25