Alpha 400 Rover Base Set Visual RTK GNSS with AR Stakeout

Alpha 400 Rover Base Set for Complete RTK Surveying

The Alpha 400 Rover Base Set is a complete GNSS RTK system for professionals who want to work with their own base and rover configuration. It is designed for land surveyors, construction layout teams, civil engineers, GIS field crews, utility mapping teams and drone pilots who need accurate positioning in areas where a fixed RTK network is not available, not preferred or not reliable enough for the job.

The set includes two Alpha 400 GNSS receivers, the Alpha B55 data collector and DiMap Pro field software. One receiver can be used as the base station while the other works as the rover. This gives field crews a self-contained RTK setup for control surveys, topographic work, stakeout, road projects, infrastructure layouts, solar farm construction, utility corridors and general mapping tasks.

Why Choose a Rover and Base Set?

A rover-only setup is often enough when a stable NTRIP or CORS correction service is available. A rover and base set gives the user more independence. The base receiver is positioned over a known point or project control point and sends RTK corrections to the rover. This is especially useful on remote sites, large construction areas, agricultural projects, drone mapping jobs and locations with limited mobile internet coverage.

For surveyors and site teams, this means the work is less dependent on third-party correction networks. It also gives more control over the local project reference, which is useful when working from site control, checking machine guidance points or maintaining consistency across repeated visits to the same project.

Visual RTK for Easier Field Measurement

The Alpha 400 combines GNSS, IMU and optical positioning technology. In practical fieldwork, this helps users measure points more easily when the survey point is not simple to access. Around walls, fences, traffic, parked machinery, ditches or building corners, the visual workflow can reduce unnecessary pole repositioning and make point collection more intuitive.

The receiver supports photoelectric measurement through a professional camera and image processing engine. The operator can work with visual information on screen and obtain coordinate data in real time. This is useful for detail surveys, utility mapping, construction checks, site documentation and measurements where a standard GNSS-only workflow would be slower.

AR Visual Stakeout for Construction and Survey Layout

AR visual stakeout helps the user find points in the real world using visual guidance. Instead of only following a direction arrow and distance value, the operator can see the stakeout location in the field view. This makes the process easier for construction workers, junior surveyors and field crews who need to find design points quickly on busy sites.

The Alpha 400 is specified with 1 cm AR visual stakeout accuracy. For road work, solar layouts, electric line projects, building set-out, earthworks and infrastructure stakeout, this helps reduce searching time and makes the point-finding process easier to understand.

60 Degree IMU Tilt Compensation

The built-in IMU tilt function supports measurements at up to 60° pole tilt. This is useful when the operator cannot hold the pole perfectly vertical or cannot stand directly above the point. In daily work, this can help when measuring beside walls, under edges, near fences, close to traffic or around obstacles on a construction site.

The Alpha 400 is designed as a calibration-free tilt system. After moving a few steps, the receiver can enter inertial navigation mode. This keeps the workflow smooth and avoids repeated setup steps during point collection or stakeout.

Strong Multi-Constellation GNSS Performance

The Alpha 400 uses a 1408-channel GNSS engine and supports GPS, GLONASS, Galileo, BeiDou, QZSS, SBAS and NavIC signals. This wide satellite support helps the receiver maintain stable tracking in different regions and field conditions.

For RTK work, the receiver is specified with horizontal accuracy of ±8 mm + 1 ppm and vertical accuracy of ±15 mm + 1 ppm. In real projects, this level of performance is suitable for survey-grade tasks such as control checks, topographic surveys, construction layout, road staking, utility surveys and drone ground control point measurement.

Base Rover Communication with UHF and 4G

The Alpha 400 receiver includes a 2W internal UHF transceiver operating from 410 to 470 MHz. This allows the base receiver to send RTK correction data to the rover without needing a mobile correction network. The system also supports common radio communication protocols including TRIMTALK, TRIMMARK, SOUTH and SATEL formats, which can be useful for mixed equipment fleets or different site setups.

The receiver also includes 4G, Wi-Fi, Bluetooth 5.0, Type-C and SIM support. This gives users flexibility for NTRIP work, controller connection, data transfer and base-rover communication depending on the project location and preferred workflow.

B55 Data Collector and DiMap Pro Field Software

The Alpha 400 Rover Base Set includes the Alpha B55 data collector. The B55 is an Android 11 field controller with an 8-core 2.0 GHz processor, 5.5 inch display, 4 GB RAM, 64 GB storage, Bluetooth 5.0, dual SIM support, Wi-Fi and a 7700 mAh battery. It is also IP67 rated, making it suitable for outdoor survey and construction use.

DiMap Pro field software supports common survey and layout tasks including 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 design drawings, DiMap Pro includes CAD tools, background layer setup, offset point correction, tilt measurement accuracy inspection, post-measurement correction, function customization and a built-in calculator. This makes the set practical for both professional surveyors and construction teams who need to move between measuring, checking and staking out points during the same working day.

Built for Long Field Days

Each Alpha 400 receiver has a compact 100 mm x 100 mm x 80 mm body and weighs 650 g. The lightweight design is comfortable for long days on a pole, while the IP67 rating helps protect the receiver against dust and water in demanding outdoor conditions.

The receiver is specified for up to 18 hours in CORS or NTRIP mode, 15 hours in radio receiving mode and 8 hours in radio transmitting mode. This is important for a rover and base workflow because the base station often needs to remain active while the rover moves around the project area.

Typical Users and Applications

The Alpha 400 Rover Base Set is suitable for land surveyors who need a complete independent RTK kit, construction teams carrying out layout work, GIS users collecting accurate asset positions, drone pilots setting ground control or using a GNSS base station, and engineering teams working on roads, utilities, photovoltaic sites, earthworks and infrastructure projects.

It is a practical choice for buyers who want more than a single rover. With two receivers, a field controller and survey software included, the Alpha 400 Rover Base Set gives teams the tools needed to start a complete base-rover workflow and keep accurate positioning under their own control.

Buying the Alpha 400 Rover Base Set from Global GPS Systems

Global GPS Systems supplies the Alpha 400 Rover Base Set with worldwide delivery and product support for professional GNSS users. Buyers can use Global GPS Systems to compare RTK receivers, check which configuration best fits their workflow and choose a setup for surveying, construction, GIS, drone mapping or infrastructure projects.