| NDI | Non-Destructive Inspection |
| NDT | Non-Destructive Testing |
| UAV | Unmanned Aerial Vehicle |
| UV | Ultraviolet |
| GCS | Ground Control Station |
| NLGL | Non-linear Guidance Law |
| LOS | Line-of-sight |
| LQR | Linear Quadratic Regulator |
| DSLR | Digital Single Lens Reflex |
| SSIM | Structural Similarity Index Measure |
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