Tag: drones
All the articles with the tag "drones".
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Navigating Blind: How Drones Fly Without GPS — and Why It Matters More Than Ever
GPS jamming and spoofing are now routine in contested airspace, and indoor/underground operations have always lived without it. This post is a technical survey of GPS-denied drone navigation in 2026 — VIO, visual SLAM, terrain-relative navigation, satellite image matching, magnetic anomaly navigation (MagNav), LiDAR SLAM, and multi-modal factor-graph fusion. Deep dives into satellite image matching (the most promising daytime approach) and MagNav (the dark horse that works at night, in fog, and is unjammable). With lessons from Ukraine, the open problems, and a practical stack for builders.