-h          display this help and exit
    -l          print groups in long format
    -s          print groups in short format (default)
    -t          print an ISO timestamp before each group
    -p <error>  parts-per-million error, passed to rtl_fm (optional;
                allows for faster PLL lock if set correctly)
    FREQ        station frequency in Hz, can be SI suffixed
                (94.0M)