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File description:
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--File:                   /data2/a_envoyer/2025/07/20250730_112716_extract2.dat
--File size:               63.48 Go
--size of the Header:     40996    octets
--data:                   Spectrum
--start time:             2025-07-30 11:27:16.914289
--stop  time:             2025-07-30 11:45:27.084678
--duration (min):                18.169506
--dt (msec):                  2.621440
--accumulation:           8       
--number of channels:     4       
--number of cubes:        415868  
--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