Geophysical Surveys / Airborne TDEM

[lheagy]

• [ ] Airborne TDEM (intro)
  • [ ] Governing Equations (links to Maxwell IV, fourier transform, smoke ring and diffusion distance, footprint)
  • [ ] Example (2 spheres, like DC)
  • [ ] Transmitter (rigid, flexible, fixed wing, chopper, waveform; base freq; tx moment)
  • [ ] Receivers (time channels)
  • [ ] Systems
  • [ ] VTEM
  • [ ] HeliTEM
  • [ ] SkyTEM
  • [ ] SPECTRUM
  • [ ] Survey Design (Flight: line and tie-line; high altitude calibration; height and Survey design: similar to AFEM; base freq)
  • [ ] Data (dB/dt and B, unit, data normalization, three ways of visualization sounding, profile, map, apparent conductivity)
  • [ ] Interpretation
  • [ ] QC / first pass interpretation: ie apparent resistivity, numbers that are more representative of what we are looking for (Viewing data; apparent resistivities, voltages)
  • [ ] Inversion : 1D, 2D, or 3D for numerical modelling? A representative halfspace or background model. or plate. Appraisal (depth of investigation)
  • [ ] Practical considerations (ie: waveform, simulating the source)

[lheagy]

@yangdikun : could you provide a quick summary status update (and check of boxes of items you see as done). Thanks!