South Galaxy G4 RTK GNSS Receiver with IMU Tilt

South Galaxy G4 RTK GNSS Receiver

The South Galaxy G4 is a modern RTK GNSS receiver designed for professional surveying, construction layout, GIS mapping and field data collection. It is built for users who need fast fixed solutions, flexible communication options and practical performance on real job sites. Whether you are measuring site control, staking out points, mapping assets or collecting topographic data, the Galaxy G4 gives field crews a strong balance of accuracy, durability and usability.

At the heart of the receiver is the S805 GNSS engine with 1698 channels. In everyday fieldwork, this means the receiver can track a wide range of satellite signals and use more available data to help maintain a stable RTK solution. This is useful for surveyors and engineers working near buildings, tree cover, embankments or other environments where satellite visibility is not always ideal.

Built for surveyors, construction crews and GIS field teams

The South Galaxy G4 is suitable for land surveyors, civil engineers, construction professionals, drone mapping teams, utility mappers, forestry users and GIS workers who require accurate positioning in the field. For construction teams, it can be used for layout, as-built checks, levels, control points and machine control support workflows. For surveyors and GIS crews, it supports boundary work, topographic surveys, asset collection, road surveys, site measurements and mapping projects.

The receiver’s yellow bodywork is designed to make the unit easier to see on construction sites, in vegetation and in low-light working conditions. This may sound simple, but it is a practical detail for busy job sites where equipment visibility helps protect both people and instruments.

IMU tilt compensation for faster measurements

The integrated IMU tilt system helps reduce the need to keep the pole perfectly level for every point. In practical terms, this makes it easier to measure points near walls, fences, corners, trenches, slopes, traffic areas or other places where holding the pole upright is difficult. The G4 supports tilt angles up to 60°, helping field crews work faster while still maintaining reliable measurement workflows.

The updated IMU system is designed to remain usable in more common field situations, including when the pole is rotated during movement or while changing direction. This makes the G4 easier to use for long survey sessions and for crews who need to move quickly between points.

Flexible RTK communication for different job sites

The South Galaxy G4 includes several communication options, making it adaptable to different working methods. The built-in 4G modem is useful for connecting to RTK correction networks through NTRIP, while the internal UHF radio supports base-rover work in areas without dependable mobile internet. WiFi, Bluetooth, NFC, Type-C and RS232 provide additional options for configuration, data transfer and connection to field controllers or other equipment.

The internal UHF radio supports the 410–470 MHz range and communication protocols such as Farlink, Trimtalk and SOUTH. For surveyors working with a local base station, this helps create a practical rover and base workflow without depending entirely on network coverage.

Rugged design for daily outdoor use

The G4 housing uses AZ91D magnesium alloy, selected for strength and heat dissipation. The receiver is designed for outdoor surveying conditions, with a compact body, field-focused controls and a durable construction suitable for daily use. The receiver also includes a built-in battery system and can be charged with Type-C, which is useful for field teams that already carry modern charging equipment.

Its Web UI can be accessed through WiFi or cable, allowing users to check receiver status, configure communication settings, manage radio parameters, review satellite tracking and perform firmware-related tasks. This is helpful for survey managers and experienced users who want more control over the receiver without relying only on a controller interface.

Data collection and office workflow support

The Galaxy G4 supports static and RTK workflows, raw data recording, data download and common GNSS data formats. This makes it suitable not only for live RTK work but also for static surveys, post-processing workflows and projects where GNSS data needs to be checked or processed after field collection.

For crews using SOUTH field and office software, the receiver can be part of a complete workflow from field measurement to data processing. Surveyors can collect points, manage layers, perform stakeout, record static data and prepare data for office use. This is valuable for teams that need a receiver that can handle both everyday construction measurements and more traditional surveying tasks.

Who should choose the South Galaxy G4?

The South Galaxy G4 is a strong choice for buyers who want a capable RTK GNSS receiver with IMU tilt, 4G, UHF and broad satellite tracking without moving into the highest-end visual or laser GNSS category. It is especially suitable for surveyors, contractors and GIS users who need reliable RTK positioning, flexible correction options and a receiver that can handle changing site conditions.

Global GPS Systems can help match the South Galaxy G4 with the right field controller, software, pole, tripod, base-rover setup or RTK network workflow. This makes it easier to build a complete GNSS solution that fits the way your team actually works in the field.