On your latter general remanence query, the RTP filtered product can show
affects when remanence is present, the affects can be exacerbated at low
magnetic latitudes. Comparing the TMI and RTP with the analytic signal or its
individual derivative components (dX, dY, dZ) for your data can add some
insight.
The ASVI (analytic signal of the vertical integral, in Macleod et al 1993) can
also be tried and compared, the reference is quoted below and outlines this
method-
"Macleod, I.N., Vieira, S., Chaves, A.C., 1993; Analytic signal and reduction
to the pole in the interpretation of total magnetic field data at low magnetic
latitudes, Proceedings of the third international congress of the Brazilian
Society of Geophysicists."
Ed
On Monday, November 23, 2015 9:17 AM, author.nameemail
<[email protected]> wrote:
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3.0cm;}#yiv5727909480 div.yiv5727909480WordSection1 {}-->Hello,I want to
clarify some doubts about potential field data modeling in GM-SYS. I can use
the TMI or the RTP anomaly when I am modeling magnetic data. But when I am
modeling simultaneously magnetic and gravity data is better to use the gravity
and reduced to the pole magnetic anomaly? Because the dipolar effect is removed
and magnetic anomalies are transformed to monopolar like the gravity anomaly.
Ideally what anomaly should I use in this case? Or does the GMSYS apply some
correction to the TMI data, because when I create a gmsys model I have to
define the magnetic field parameters (magnitude, inclination and declination)
at the measurement location? Other question is related to the presence of
remanance magnetization. When remanent magnetization is present is better to
use the TMI data and not the RTP anomaly? Or I can use other derivative grid
like the analytical signal? Best regards,Ana --- Forum archives can be
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