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File description:
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--File:                   /data2/a_envoyer/2021/10/20211027_160337_extract2.dat
--File size:               37.21 Go
--size of the Header:     32804    octets
--data:                   Spectrum
--start time:             2021-10-27 16:03:37.999408
--stop  time:             2021-10-27 16:16:56.736415
--duration (min):                13.312283
--dt (msec):                  2.621440
--accumulation:           8       
--number of channels:     4       
--number of cubes:        304695  
--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