Folks, There’s a clear enough definition in the paper by Verduzco et al in The Meter Reader (TLE February 2004). I believe they coined the term, so their definition should stand. TDR (Tilt Derivative) is effectively the tilt of the derivatives, They also define the “TDR_THDR” which is the total horizontal derivative of the TDR. I do not believe Verduzco et al were trying to suggest that Tilt is a derivative. Its clearly not.
Given that they defined and published the term, perhaps we should respect that and not go off with our own names for this entity? Nor go off with other definitions for the term? I confess that “Derivative Tilt” might have been a more descriptive name, but it somehow doesn’t have much of a ring, does it? Anyway, its useful as described. And I teach it and use it in that form. I do not have any conflict of interest to declare, here. Regards Alan Reid > On 6 Oct 2020, at 18:40, S E Geoscience and Exploration via SEGMIN > <[email protected]> wrote: > > Thanks. > > I prefer to call it "Amplitude Equalizer", sort of. > > On Tue, Oct 6, 2020 at 1:35 PM Richard Smith via SEGMIN > <[email protected] <mailto:[email protected]>> wrote: > Perhaps it is called tilt derivative as you have to calculate derivatives to > calculate it, as in the "tilt of the derivatives". Personally, I prefer the > term, "local phase" (Thurston and Smith, 1997), but I have a conflict of > interest! > > Regards > Richard Smith > > > > -----Original Message----- > From: S E Geoscience and Exploration via SEGMIN <[email protected] > <mailto:[email protected]>> > To: [email protected] <mailto:[email protected]> > Cc: S E Geoscience and Exploration <[email protected] > <mailto:[email protected]>> > Sent: Tue, Oct 6, 2020 11:29 am > Subject: [SEGMIN] Tilt is not a derivative > > Dear all, > > I am always so puzzled. Why do people call the Tilt in potential techniques a > derivative? It is not. > > Regards > > -- > Sergio Espinosa, Ph.D., P.Geo > Director, Geophysics > S E Geoscience & Exploration > ----------------------- > SEGMIN community mailing list service ([email protected] > <mailto:[email protected]>). > Change your personal options here: > https://lists.geosoft.com/mailman/options/segmin/geofizzics%40aol.com > <https://lists.geosoft.com/mailman/options/segmin/geofizzics%40aol.com> > Colleagues can join here: https://lists.geosoft.com/mailman/listinfo/segmin > <https://lists.geosoft.com/mailman/listinfo/segmin> > Archives: https://lists.geosoft.com/mailman/private/segmin/ > <https://lists.geosoft.com/mailman/private/segmin/> > NOTE that <Reply> will reply to all members of the list. > ----------------------- > SEGMIN community mailing list service ([email protected] > <mailto:[email protected]>). > Change your personal options here: > https://lists.geosoft.com/mailman/options/segmin/se.geoscience.and.exploration%40gmail.com > > <https://lists.geosoft.com/mailman/options/segmin/se.geoscience.and.exploration%40gmail.com> > Colleagues can join here: https://lists.geosoft.com/mailman/listinfo/segmin > <https://lists.geosoft.com/mailman/listinfo/segmin> > Archives: https://lists.geosoft.com/mailman/private/segmin/ > <https://lists.geosoft.com/mailman/private/segmin/> > NOTE that <Reply> will reply to all members of the list. > > > -- > Sergio Espinosa, Ph.D., P.Geo > Director, Geophysics > S E Geoscience & Exploration > ----------------------- > SEGMIN community mailing list service ([email protected]). > Change your personal options here: > https://lists.geosoft.com/mailman/options/segmin/alan%40reid-geophys.co.uk > Colleagues can join here: https://lists.geosoft.com/mailman/listinfo/segmin > Archives: https://lists.geosoft.com/mailman/private/segmin/ > NOTE that <Reply> will reply to all members of the list. Alan B Reid PhD Reid Geophysics Ltd 7 Keymer House Michel Grove Eastbourne BN21 1JZ UK Phone: +44 (0) 1323 735520 Mobile: +44 (0) 781 692 4728 Skype Name: alanbarryreid mailto: [email protected] web: http://www.reid-geophys.co.uk
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