Tracking constellation developments, algorithm evolution and market shifts — depth-first analysis for engineers and decision-makers.
eVTOL air taxis, drone delivery corridors and vertiport operations are scaling faster than any GNSS segment. We map the positioning stack behind the low-altitude economy: Network RTK for corridor navigation, GBAS-style precision approach, and why UTM systems are adopting RTCM-grade truth as their common frame.
9 min readHumanoid robots, mobile manipulators and autonomous fleets can only act safely in the world if they know where they are in it. Visual SLAM drifts and IMUs wander; RTK supplies the centimeter-level absolute frame that anchors physical AI — indoors-outdoors transitions included.
10 min readCommunity-operated triple-band reference stations have pushed Network RTK past 15,000 base stations worldwide. We examine how incentivized, decentralized CORS coverage is undercutting legacy subscription networks — and what it means for rover OEMs and end users.
8 min readFive years after BeiDou-3 reached full global capability, its PPP-B2b precise point positioning service covers the Asia-Pacific, consumer-grade chips have shipped in phones and wearables, and high precision is migrating from professional surveying to mass-market devices.
6 min readThree decades after Teunissen introduced the LAMBDA method, integer least-squares search remains the gold standard for ambiguity fixing. We trace its evolution and examine why partial ambiguity resolution matters in challenging environments.
12 min readPPP-RTK marries the wide-area reach of precise point positioning with RTK-grade convergence speed. GEO-broadcast SSR corrections deliver centimeter-level convergence in under a minute — no terrestrial network required.
9 min readBuilding reflections are the biggest enemy of urban high-precision positioning. Choke-ring antennas, 3D-mapping-aided NLOS exclusion and factor graph optimization — it takes all three to keep RTK honest between skyscrapers.
10 min readRTK-based AB-line guidance is becoming factory-standard on mid- and high-horsepower tractors worldwide. With installed bases crossing the million-unit mark, the last mile to the fully unmanned farm is closing fast.
5 min readFor safety-critical autonomy, being accurate is not enough — the system must know how accurate it is. A systematic tour of RAIM fault detection, protection-level computation and the SBAS/GBAS integrity frameworks.
11 min read