February 25, 2026
EMLiD has officially unveiled its next-generation GNSS receivers, the Reach RS4 and Reach RS4 Pro, introducing a major advancement in high-precision surveying technology engineered for challenging environments.
The launch directly addresses one of the most persistent obstacles facing surveyors across Africa: maintaining centimetre-level GNSS accuracy under dense tree canopy and within complex urban landscapes. For professionals operating in West Africa’s forest belts and rapidly expanding metropolitan areas, signal obstruction has long limited productivity and precision.
From the dense forest regions of Ghana’s cocoa-growing zones to the vertical congestion of Lagos’ urban corridors, surveyors frequently contend with multipath interference, signal loss, and delayed initialization times. The Reach RS4 series introduces a completely redesigned GNSS engine powered by an advanced u-blox chip supporting L5 and L6 frequency bands.
This expanded frequency support enables significantly faster initialization, improved satellite tracking, and more stable fixed solutions under heavy foliage or near tall structures, environments where traditional receivers often struggle. For land surveyors, civil engineers, and geospatial researchers, this means fewer interruptions, reduced rework, and higher field efficiency.
While both models deliver substantial performance improvements, the RS4 Pro introduces features aimed at redefining workflow efficiency.
The Pro model integrates factory-calibrated cameras, enabling Visual Capture functionality. This allows surveyors to measure physically inaccessible points, such as building corners above ground level or hazardous construction zones, using photogrammetry-based point extraction.
Additionally, AR Stakeout technology provides intuitive, on-screen visual guidance when marking field points, reducing guesswork and improving accuracy during layout tasks. These features are particularly valuable in dense urban settings, where safety risks and physical constraints often complicate conventional surveying methods.
Unlike systems built around off-the-shelf components, EMLiD has engineered a custom antenna specifically optimized for the new GNSS chipset. The result is improved signal filtering, enhanced multipath rejection, and stronger overall reception performance in difficult terrain.
Connectivity has also been upgraded. The RS4 series includes a high-power 915 MHz LoRa radio for extended-range communication, along with a 450 MHz transmit/receive radio, providing compatibility with legacy surveying equipment used across the region.
Durability has not been overlooked. The devices feature an industrial-grade bumper design engineered to withstand field drops and rough handling, alongside a quick-release thread compatible with standard survey poles.
The timing of the RS4 release aligns with accelerating infrastructure development and agricultural modernization across West Africa. In forestry and agriculture, improved canopy penetration enables more accurate mapping of cocoa farms, oil palm plantations, and protected forest reserves — critical for land management, yield optimization, and environmental monitoring.
In urban development, the RS4 Pro’s Visual Capture capability allows professionals to collect survey data without stepping into high-traffic roadways or restricted construction zones, enhancing both safety and efficiency.
As governments and private developers invest in transportation networks, housing expansion, and agricultural transformation, demand for reliable high-precision GNSS equipment continues to grow. The Reach RS4 and RS4 Pro arrive at a pivotal moment — offering surveyors tools specifically engineered to meet Africa’s environmental and infrastructural realities.
For more information, visit the official product page at dronehubgh.com or watch the product overview at www.youtube.com/@dronehubafrica
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