Dale, Thank you for making enough clarification. ......grateful. Solomon N. Yusuf PhD student Mautech, Yola. On 28 Aug 2014 16:20, "Dale Bird" <[email protected]> wrote:
> Total Magnetic Intensity (TMI) means, to many, to mean the total intensity > of the earth’s magnetic field. That is, no IGRF correction. > > > > But after IGRF correction, then it might be better to say “TMI Anomalies”. > That is, anomalous to the total field. > > > > But if you really want to split hairs, TIMA might be more accurate: Total > Intensity (describes the vector) Magnetic Anomalies (describes what you’re > looking at). > > > > Depending upon where you’re at, some folks say “residual magnetic > anomalies” meaning “TMI Anomalies” ( = IGRF removed). > > > > But then if the data are enhanced by filtering would that be the residual > of the residual? > > > > J Cheers, Dale > > > > _________________________________________ > > > > *So many windmills, So few Quixotes* - John Lujan > > _________________________________________ > > > > Dale Bird, Ph.D. > > *Bird Geophysical* > > 16903 Clan Macintosh > > Houston, Texas 77084-1942 > > + 1-281-463-3816 Office > > + 1-281-463-7899 Fax > > + 1-713-203-1927 Mobile > > [email protected] > > www.birdgeo.com > > > > *From:* [email protected] [mailto:[email protected]] *On > Behalf Of *SOLOMON YUSUF > *Sent:* Thursday, August 28, 2014 9:53 AM > *To:* Geosoft Oasis montaj and Target > *Subject:* RE: [Bulk] [geonet] TMI OR RESIDUAL > > > > Sir > If I understand you well I should use the Total magnetic intensity data > after removing the IGRF....to calculate my spectral analysis and gm-sys > models... > Solomon > > On 28 Aug 2014 15:46, "Chris Vaughan" <[email protected]> wrote: > > Then you’ll want to watch the wavelength cutoff of the regional you > remove. If sufficiently long, your target’s spectral response should come > out about the same. > > > > Regards, Chris > > Chris Vaughan > > President and Chief Geophysicist, CGI Controlled Geophysics Inc. > > *From:* [email protected] [mailto:[email protected]] *On > Behalf Of *SOLOMON YUSUF > *Sent:* August-28-14 10:16 AM > *To:* Geosoft Oasis montaj and Target > *Subject:* RE: [Bulk] [geonet] TMI OR RESIDUAL > > > > I mean residual= TMI-regional data > And TMI= TMI when IGRF was calculated. > Thank you > Solomon > > On 28 Aug 2014 14:58, "Chris Vaughan" <[email protected]> wrote: > > If by residual magnetics, you mean removal of the IGRF, then yes, that > would be better, especially on a regional scale. > > > > Regards, Chris > > Chris Vaughan > > President and Chief Geophysicist, CGI Controlled Geophysics Inc. > > > > *From:* [email protected] [mailto:[email protected]] *On > Behalf Of *SOLOMON YUSUF > *Sent:* August-28-14 9:25 AM > *To:* Geosoft Oasis montaj and Target > *Subject:* [Bulk] [geonet] TMI OR RESIDUAL > > > > Dr all, > Please I will like know which is better > 1. Use TMI for spectral analysis and modelling when studying a sedimentary > basin for basin configuration and sedimentary thickness > Or > 2. Use residual data for the analysis above. > Solomon N. Yusuf > PhD student > Mautech, Nigeria. > > --- > > Forum archives can be accessed here: > http://lyris.geosoft.com/read/?fourm=geonet > > You are currently subscribed to geonet as: [email protected]. > > To subscribe or unsubscribe from any of our forums, select the User Forum > selection on the Geosoft Community page: > http://www.geosoft.com/support/community > > --- > > Forum archives can be accessed here: > http://lyris.geosoft.com/read/?fourm=geonet > > You are currently subscribed to geonet as: [email protected]. > > To subscribe or unsubscribe from any of our forums, select the User Forum > selection on the Geosoft Community page: > http://www.geosoft.com/support/community > > --- > > Forum archives can be accessed here: > http://lyris.geosoft.com/read/?fourm=geonet > > You are currently subscribed to geonet as: [email protected]. > > To subscribe or unsubscribe from any of our forums, select the User Forum > selection on the Geosoft Community page: > http://www.geosoft.com/support/community > > --- > > Forum archives can be accessed here: > http://lyris.geosoft.com/read/?fourm=geonet > > You are currently subscribed to geonet as: [email protected]. > > To subscribe or unsubscribe from any of our forums, select the User Forum > selection on the Geosoft Community page: > http://www.geosoft.com/support/community > > --- > > Forum archives can be accessed here: > http://lyris.geosoft.com/read/?fourm=geonet > > You are currently subscribed to geonet as: [email protected]. > > To subscribe or unsubscribe from any of our forums, select the User Forum > selection on the Geosoft Community page: > http://www.geosoft.com/support/community > > --- > > Forum archives can be accessed here: > http://lyris.geosoft.com/read/?fourm=geonet > > You are currently subscribed to geonet as: [email protected]. > > To subscribe or unsubscribe from any of our forums, select the User Forum > selection on the Geosoft Community page: > http://www.geosoft.com/support/community > --- Forum archives can be accessed here: http://lyris.geosoft.com/read/?fourm=geonet You are currently subscribed to geonet as: [email protected]. 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