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File description:
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--File:                   /data2/a_envoyer/2025/12/20251212_004326_extract2.dat
--File size:               18.36 Go
--size of the Header:     16420    octets
--data:                   Spectrum
--start time:             2025-12-12 00:43:26.259692
--stop  time:             2025-12-12 00:56:34.201666
--duration (min):                13.132366
--dt (msec):                  2.621440
--accumulation:           8       
--number of channels:     4       
--number of cubes:        300577  
--number of frequencies:  4096    
--central freq (MHz):      12.50
--freq echantillon (MHz): 200.00
--Bandwidth (MHz):         12.50
--first frequency (MHz):    6.25
--last frequency (MHz):    18.75