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neerajn07/README.md

Neeraj Nainwal

Computational Geophysicist | UAV Radiometrics | Magnetics | Inversion

PhD Candidate in Geological Sciences at Queen's University, Canada

Email LinkedIn GitHub ResearchGate


About

I am a computational geophysicist specializing in UAV-based radiometric and magnetic surveys. My research combines physics-based modelling, numerical simulation, inversion, and geophysical data processing to improve survey design and geological interpretation.

My current work examines how flight altitude, line spacing, detector response, sampling density, terrain, and measurement uncertainty affect the quality of UAV geophysical data. I develop practical computational tools for simulating surveys, evaluating acquisition strategies, and interpreting potential-field and gamma-ray spectrometry datasets.


Research Focus

UAV Geophysics

Survey design, acquisition assessment, flight-data synchronization, quality control, and interpretation of UAV magnetic and radiometric datasets.

Modelling and Inversion

Forward modelling and three-dimensional inversion of gravity, magnetic, and radiometric data using Python, MATLAB, and in-house numerical codes.

Gamma-Ray Spectrometry

Investigation of detector footprint, counting statistics, terrain effects, flight height, and acquisition geometry in UAV radiometric surveys.

Geoscience Data Integration

Integration of radiometric, magnetic, spatial, and geological information for lithological mapping and geological interpretation.


Current Work

  • Developing RadSIMU, a physics-based survey simulation framework for UAV gamma-ray spectrometry.
  • Building forward-modelling and inversion workflows for gravity and magnetic data.
  • Evaluating the influence of flight altitude, line spacing, detector footprint, and sampling density on survey resolution.
  • Investigating counting statistics, acquisition-related noise, and uncertainty in radiometric measurements.
  • Applying spatially validated machine-learning methods to lithological mapping using magnetic and radiometric data.

Selected Projects

Project Description Access
Drone-Geophysics Processing, visualization, and analysis workflows for UAV magnetic and radiometric data. Public
RadSIMU Physics-based simulation framework for evaluating UAV gamma-ray spectrometry surveys. Research
3D Inversion Workflows Python and MATLAB workflows for gravity and magnetic forward modelling and inversion. Research
Radiometric Noise Diagnostics Methods for analysing counting statistics, acquisition noise, and survey-related uncertainty. Research

Some research codes and datasets are not publicly available because they are associated with ongoing publications, collaborations, or restricted datasets.


Technical Experience

Programming Python, MATLAB
Scientific Computing NumPy, SciPy, pandas
Modelling and Inversion SimPEG, Fatiando a Terra, MAG3D, in-house numerical codes
Geophysical Processing Oasis Montaj, magnetic and radiometric data processing, quality control
GIS and Remote Sensing QGIS, ENVI, geospatial data processing
Research Methods Forward modelling, inversion, simulation, uncertainty analysis, machine learning

Education

2021–Present PhD in Geological Sciences
Queen's University, Canada
2018–2020 M.Tech in Geological Technology
Indian Institute of Technology Kanpur, India
2013–2017 B.Tech in Geoscience Engineering
UPES Dehradun, India

Selected Conference Presentations

AGU 2024 Spectral processing and terrain effects in UAV gamma-ray spectrometry
SEG 2024 RadSIMU: A simulation framework for UAV radiometric surveys
CGU 2024 Three-dimensional inversion of gravity and magnetic data

GitHub Activity

Neeraj Nainwal's GitHub statistics

Most used programming languages


Contact

For research discussions and collaborations related to UAV geophysics, gamma-ray spectrometry, potential-field methods, modelling, or inversion:

Email  •  LinkedIn  •  ResearchGate

Pinned Loading

  1. Gravity-and-Magnetic-Inversion Gravity-and-Magnetic-Inversion Public

    Some basics on kernal matrix calculations

    MATLAB 1

  2. potential-field-inversion potential-field-inversion Public

    A collection of Python scripts for inverting geophysical data, including potential fields (gravity, magnetics) and electrical resistivity tomography (ERT). Implements regularized and constrained al…

    1

  3. Drone-Geophysics Drone-Geophysics Public

    Repo to process drone based magnetic and radiometric data

    Python

  4. UAV-Radiometrics-Magnetic-Modeling UAV-Radiometrics-Magnetic-Modeling Public

    Module to process the UAV borne radiometric and magnetic data.