Directory Contains Magnetic, Radiometric and EM data from the Steinkjer area, Nord-Trøndelag county.

NGU Report 2015.060 describes acquisition, quality, processing and presentation of the data.

Magnetic data are presented as:
	Total magnetic field (Steinkjer_MAG_Tot_anom)
	Magnetic Vertical Gradient (Steinkjer_MAG_VG)
	Magnetic Horizontal Derivative (Steinkjer_Mag_HD)
	Magnetic Tilt Derivative (Steinkjer_MAG_TD)
	Geosoft XYZ-file with x and Y coordinates, instrument height, altitude above sea level, IGRF value  and magnetic anomaly.

Radiometric data are presented as:
	Radiometric Ternary Map  (Steinkjer_RAD_Ternary)
	Radiometric Total Count (Steinkjer_RAD_TotalCount)
	Potassium ground concentration in % (Steinkjer_RAD_Potassium)
	Uranium ground concentaration in ppm (Steinkjer_RAD_Uranium)
	Thorium ground concentration in ppm (Steinkjer_RAD_Thorium)
	Geosoft XYZ-file of X and Y coordinates, instrument height, Uranium (ppm), Thorium (ppm) and 
		Potassium (%) ground concentrations as well as Total Counts (TC).

ElectroMagnetic data are presented as Calculated Apparent Resistivity 
from half space model, In phase and Quadrature Components:
	880 Hz Coplanar (Steinkjer_EM_Res880)
	980 Hz Coaxial  (Steinkjer_EM_Res980)
	6600 Hz Coplanar  (Steinkjer_EM_Res6600)
	7001 Hz Coaxial  (Steinkjer_EM_Res7000)
	
	Geosoft XYZ-file with X and Y coordinates, Instrument height, In phase and quadrature readings and 
		apparent resistivity for all frequencies. 

		Note 1: No data for EM 34kHz due to instrument problems.
		Note 2: miclev means microleveled data, 3x3 means convolution filtered data.


For more information, contact: jan.ronning@ngu.no