UXO Data Processing in Oasis montaj — Depth & Weight Estimation Tutorial (Webinar Replay)

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Unlock accurate UXO target analysis in less than an hour!
In this step-by-step Oasis montaj tutorial, geoscientist Becky Bodger and SPH Engineering CEO Alexey Dobrovolskiy show you how to process magnetometer data, estimate depth & weight, and confidently close UXO targets.

What you’ll learn
🟢 Depth & width estimation methods
🔵 Fast Oasis montaj workflow for large datasets
🟡 Live demo on real magnetometer data
🟠 Best practices for marking and closing targets
🟣 Q&A with the experts

Who is this for? Drone geophysicists, UXO clearance teams, GIS engineers, and anyone using magnetometer.

Try it yourself:
▸ Learn more about magnetometers → Magnetometer | Technologies
▸ Get a UgCS → UgCS | Downloads
▸ Read the companion article → Magnetometer data processing using Oasis montaj: crash course


⏱️ Timestamps

00:00 Intro & test-site context
00:57 Test-site history & UXO risk
01:47 Drone flight & first magnetic map
03:33 Findings & need for depth/weight estimation
04:47 Becky takes over (speaker change)
05:32 Meet Becky – quick intro
06:07 AOI map & flight-line layout
07:17 Pre-processing: trace cleaning
08:23 Corrections (lag, heading error, base station…)
10:25 Total Field vs Gradient + dipole shapes
12:06 Target-selection methods (Blakeley, dipole)
15:32 Filtering target list – 38 anomalies
16:53 Creating the Residual channel (background removal)
19:03 Generating modelling windows S/N
22:24 Choosing block size (15–20 m)
24:06 Manual polygon editing
27:12 Batch F-Fit – start inversion
29:02 Inversion parameters & geomagnetic field
31:17 QC of results: coherence, depth, size
37:25 Visual QC (residual maps)
40:11 Low-coherence example & window fix
41:09 Q&A begins
47:36 Q: line spacing & minimum target
49:15 Background-removal methods
52:56 Land vs Marine toolbox + instrument drift
55:46 Target size vs flight altitude
01:01:21 Dipole width & classification
01:10:29 Model-shape limitations (sphere only)
01:14:31 QC/QA tools & navigation
01:16:48 Closing & thanks

👉 Comment below which sensor you’d like us to cover next!

#UXO #OasisMontaj #Magnetometer #Geophysics #DroneMapping #UgCS