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File description:
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--File:                   /data2/a_envoyer/2021/08/20210824_223451_extract2.dat
--File size:               92.53 Go
--size of the Header:     32804    octets
--data:                   Spectrum
--start time:             2021-08-24 22:34:51.741045
--stop  time:             2021-08-24 23:07:57.793841
--duration (min):                33.100880
--dt (msec):                  2.621440
--accumulation:           8       
--number of channels:     4       
--number of cubes:        757620  
--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