Alpha 400 Visual RTK GNSS Receiver with AR Stakeout

Alpha 400 GNSS RTK Receiver for Visual Surveying and Stakeout

The Alpha 400 GNSS RTK is a lightweight visual positioning receiver designed for professionals who need accurate, efficient positioning in the field. It is made for land surveying, construction layout, road and utility work, GIS data collection, drone support and other jobs where reliable RTK performance saves time on site.

Instead of relying only on a traditional GNSS pole workflow, the Alpha 400 combines satellite positioning, IMU tilt measurement and visual positioning. This helps users collect points and stake out locations faster, especially in areas where obstacles, corners, traffic, fences or machinery make it difficult to keep the pole vertical or stand directly over the target point.

Visual Positioning for Practical Fieldwork

The Alpha 400 uses visual positioning to help measure what you see on screen. For surveyors and construction workers, this can make fieldwork more intuitive. When a point is difficult to reach or when the site is visually complex, the receiver’s camera-based workflow helps the operator identify and measure positions more clearly.

This is useful for everyday tasks such as site measurements, detail surveys, point collection, utility mapping and checking features around buildings, roads or infrastructure. The visual workflow can reduce unnecessary repositioning and helps users work more confidently in situations where a standard GNSS-only workflow is slower.

AR Visual Stakeout for Faster Point Finding

AR visual stakeout gives the operator a real-world view of where the point is located. Instead of only following arrows and distances on a data collector, the user can visually navigate toward the stakeout position. This is especially helpful for construction layout, road staking, photovoltaic projects, electric line work and other jobs where teams need to find points quickly and clearly.

The Alpha 400 is designed to provide an immersive visual stakeout experience with real-time display feedback. In practical terms, this helps field crews reduce searching time, avoid confusion on busy sites and place points with more confidence.

60 Degree IMU Tilt Compensation

The built-in IMU tilt function allows measurements at up to 60° pole tilt. This is useful when the point is close to a wall, under an overhang, beside a fence, near traffic or in any place where standing directly over the point is awkward or unsafe.

The Alpha 400 is calibration-free and does not require a long initialization process. After moving a few steps, the receiver can enter inertial navigation mode and provide tilt-compensated measurements. For field users, this means fewer interruptions and a smoother workflow during repeated point collection or stakeout tasks.

Strong GNSS Tracking and RTK Performance

The Alpha 400 tracks GPS, GLONASS, Galileo, BeiDou, QZSS, SBAS and NavIC signals across 1408 channels. This broad signal support helps maintain positioning performance in different regions and under varying satellite conditions.

For RTK work, the receiver supports horizontal accuracy of ±8 mm + 1 ppm and vertical accuracy of ±15 mm + 1 ppm. In the field, this level of performance is suited to common survey-grade tasks such as topographic surveys, site layout, control checks, boundary support work, road staking and machine-guidance preparation workflows where centimeter-level positioning is required.

Flexible Communication for NTRIP and Base Rover Setups

The Alpha 400 supports 4G, Wi-Fi, Bluetooth 5.0 and a Type-C interface, giving users several ways to connect to controllers, correction services and field software. For NTRIP work, the integrated 4G modem allows the receiver to connect to correction networks where coverage is available.

The integrated 2W UHF transceiver supports 410–470 MHz operation and common radio protocols including TRIMTALK, TRIMMARK, SOUTH and SATEL formats. This makes the Alpha 400 a flexible option for crews using base-rover workflows or mixed equipment fleets.

Built for Long Field Days

The Alpha 400 is compact and light, with a 100 mm x 100 mm x 80 mm body and a weight of 650 g. This makes it comfortable for long days on a pole, especially for crews moving across larger construction sites, farmland, road corridors or utility routes.

Battery life is designed for real working days, with up to 18 hours in NTRIP mode, 15 hours in radio receiving mode and 8 hours in radio transmitting mode. The receiver is IP67 rated for dust and water protection and is specified for operation from -30°C to +70°C, helping it handle demanding outdoor environments.

Field Software and Survey Applications

The Alpha 400 is supplied for use with professional surveying workflows such as point survey, detail survey, control point survey, point stakeout, CAD mapping, road stakeout, electric line survey, DSM stakeout, polyline survey, polygon survey, spiral stakeout, electric tower stakeout and photovoltaic stakeout.

For users working with drawings and maps, the supported software environment includes CAD-based tools, background layers, offset point correction, tilt accuracy checks, post-measurement correction and built-in calculation tools. These functions are useful for surveyors, engineers and site crews who need to move between measurement, layout and mapping tasks during the same project.

Who Uses the Alpha 400 GNSS RTK?

The Alpha 400 is suitable for surveyors who need centimeter-level GNSS measurements, construction workers who need a practical layout tool, drone pilots who require a GNSS base station option, GIS teams collecting accurate asset positions and engineering teams working on roads, utilities, solar farms, land development and infrastructure projects.

Its combination of visual measurement, AR stakeout, IMU tilt and RTK connectivity makes it a strong choice for users who want a modern GNSS receiver that is still practical for daily fieldwork. It helps experienced surveyors work faster and gives less-specialized field teams a clearer way to understand where points are in the real world.

Buying the Alpha 400 from Global GPS Systems

Global GPS Systems supplies the Alpha 400 GNSS RTK with expert advice, worldwide delivery and support for choosing the right configuration. Buyers can use Global GPS Systems to compare RTK receivers, check compatibility with their workflow and select the right setup for surveying, construction, GIS, drone or mapping applications.