plotting data w.r.t timestamp from a text file containing some other garbage info

[dev1990]

please provide some clue how to plot parameters with respect to timestamps
where the text file contains info like below

%========================================================================
% Auto-generated Text File exported by Random Software

% Copyright (C) Random Inc.

% Confidential - Random Corporation.

% Do not distribute without permission.
%========================================================================

Data

%========================================================================
% Column #1   : Time
% Column #2   : Parameter 1
% Column #3   : parameter 2
%========================================================================

10:31:35.145      -7.28   -0.34 
10:31:35.146     -11.95  -17.84 



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