====================================================
File description:
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--File:                   /data2/a_envoyer/2018/10/20181001_140932_extract2.dat
--File size:               15.47 Go
--size of the Header:     24612    octets
--data:                   Spectrum
--start time:             2018-10-01 14:09:32.398438
--stop  time:             2018-10-01 14:16:54.939429
--duration (min):                7.3756832
--dt (msec):                  2.621440
--accumulation:           8       
--number of channels:     4       
--number of cubes:        168817  
--number of frequencies:  6144    
--central freq (MHz):      15.62
--freq echantillon (MHz): 200.00
--Bandwidth (MHz):         18.75
--first frequency (MHz):    6.25
--last frequency (MHz):    25.00