Chirp seismic traces - Hilbert Transform?

I have Chirp sub bottom profile traces, these are just a form a seismic
trace, basically a time series with amplitudes.  Normal seismic traces
have positive and negative amplitude values. These traces only have
positive values, I belive this is called a instantaneous amplitude trace.

How can I process this so it returns to a conventional seismic trace with
positive and negative values?  From my reading I belive I need to use a
Hilbert transform (or inverse?),  But how?  what steps do I need to
follow?

any help would be graetly appreciated

best regards

Nigel

ok good
           can you eloborate on what exactly are you going to do by
bringing in the INSTANTANEOUS AMPLITUDE TRACE to normal seismic signal.
and by what method they are generated.
give complete description at system level,
so that i can understand and if possible i can help you, if problem is
within my knowledge reach
regards
particlereddy


NigelT wrote:
> I have Chirp sub bottom profile traces, these are just a form a seismic
> trace, basically a time series with amplitudes.  Normal seismic traces
> have positive and negative amplitude values. These traces only have
> positive values, I belive this is called a instantaneous amplitude trace.
>
> How can I process this so it returns to a conventional seismic trace with
> positive and negative values?  From my reading I belive I need to use a
> Hilbert transform (or inverse?),  But how?  what steps do I need to
> follow?
> 
> any help would be graetly appreciated
> 
> best regards
> 
> Nigel

NigelT skrev:
> I have Chirp sub bottom profile traces, these are just a form a seismic
> trace, basically a time series with amplitudes.  Normal seismic traces
> have positive and negative amplitude values. These traces only have
> positive values, I belive this is called a instantaneous amplitude trace.
>
> How can I process this so it returns to a conventional seismic trace with
> positive and negative values?  From my reading I belive I need to use a
> Hilbert transform (or inverse?),  But how?  what steps do I need to
> follow?

I think you might have a problem.

I have tried to use seismic processing techniques with SBP data,
with little luck. The reason is that SBP data seem to be stored as
instantaneous magnitude whereas seismic data are stored as
instantaneous amplitude. To the very little extent I know how SBP
data are processed, it seems as if they are Hibert transformed
prior to storage.

I don't think it is possible to invert this processing. 

Rune