Filtrering og LCI inversion

1. Filtrering og LCI inversion Esben Auken • HydroGeophysics Group • Department of Earth Sciences, University of Aarhus, Denmark • www.hgg.au.dk

2. Processeringsindstillinger • GPS data • Angle data • Altitude data • Voltage data • Filtering of couplings from raw data • Averaging core set up • Filtering of noise filled data from averaged data

3. Filtrering af data – lavmoment z-data • Flyvehøjde er 25 – 35 m • Stærk korelation imellem flyverhøjde og signalniveau Raw Voltage Data Altitude of Tx coil

4. Average center point Average center point Average sounding, Rho-a Average sounding, Rho-a Gamle data Raw Voltage data Raw voltage data 3 min  2 line km Altitude

5. Average center point Average center point Nye data – lige filtre Averaged Voltage data Raw voltage data 3 min  2 line km Altitude

6. Average sounding, Rho-a Average sounding, Rho-a Nye data – skrå filtre Average center point Average center point Averaged voltage Data Raw voltage Data 3 min  2 line km Altitude

7. Inversion Methodology • LCI – soundings

8. Inversion Methodology • LCI – soundings • Add constraints – a variance between the model parameters

9. Inversion Methodology • LCI – soundings • Add constraints – a variance between the model parameters • Few layer parameterization – all parameters floating

10. Inversion Methodology • LCI – soundings • Add constraints – a variance between the model parameters • Smooth model parameterization – fixed layer boundaries