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File description:
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--File:                   /data2/a_envoyer/2026/01/20260104_004104_extract2.dat
--File size:               15.71 Go
--size of the Header:     40996    octets
--data:                   Spectrum
--start time:             2026-01-04 00:41:04.804414
--stop  time:             2026-01-04 00:45:34.647609
--duration (min):                4.4973866
--dt (msec):                  2.621440
--accumulation:           8       
--number of channels:     4       
--number of cubes:        102938  
--number of frequencies:  10240   
--central freq (MHz):      21.87
--freq echantillon (MHz): 200.00
--Bandwidth (MHz):         31.25
--first frequency (MHz):    6.25
--last frequency (MHz):    37.50