Spherefix SP30Se RTK GNSS Rover Set with IMU

A complete RTK rover set for professional field measurement

The Spherefix SP30 SE Rover Set combines a multi-constellation RTK GNSS receiver with the C100T Android field controller to create a practical system for accurate surveying, mapping and construction work. It is intended for surveyors, site engineers, construction crews, GIS teams, utility contractors and drone operators who need centimetre-level positioning without assembling a receiver and controller separately.

The rover can connect to a compatible NTRIP correction service through its integrated 4G modem. This makes it suitable for working across regional RTK networks without setting up a local base receiver. The SP30 SE can also communicate through its integrated UHF radio when used within a compatible base-and-rover system.

Multi-constellation GNSS performance

The SP30 SE uses 1,408 GNSS channels and tracks signals from GPS, GLONASS, Galileo, BeiDou, QZSS, SBAS and NavIC. Tracking several satellite constellations gives the receiver access to more observations across the sky, helping it maintain a usable position when some signals are blocked by buildings, trees, machinery or terrain.

Under suitable RTK conditions, the receiver has a specified horizontal accuracy of ±(8 mm + 1 ppm) and vertical accuracy of ±(15 mm + 1 ppm). In practical fieldwork, this level of performance is suited to measuring site features, recording utilities, checking earthworks, surveying boundaries, positioning ground control points and setting out construction designs.

Measure difficult points with IMU tilt compensation

The integrated IMU allows the pole to be tilted by up to 60 degrees while the software calculates the position of the pole tip. This reduces the need to centre the bubble perfectly before every measurement and helps operators collect points more efficiently.

Tilt compensation is particularly useful beside walls, underneath vegetation, close to parked equipment, at trench edges and around building corners. The pole tip can be placed directly on the required point while the receiver is kept away from the obstruction and in a better position to receive satellite signals.

C100T Android field controller

The included C100T controller is designed for outdoor survey data collection. Its 5.45-inch high-resolution display is made to remain readable in bright daylight, while the touchscreen and physical keypad provide different ways to operate survey software in changing weather and site conditions.

An eight-core processor and Android 11 operating system support compatible GNSS field applications for point measurement, coding, linework and stakeout. Dual-SIM 4G communication helps the controller stay connected to internet-based correction services, project data and office teams. The controller is specified for up to 18 hours of operation, supporting extended working days without frequent charging.

Flexible communication for network and radio RTK

Integrated 4G, Wi-Fi and Bluetooth allow the SP30 SE to exchange correction data and communicate with the field controller. Surveyors working within an available RTK network can receive NTRIP corrections through a mobile internet connection and begin measuring without operating their own base station.

The receiver also includes a 410–470 MHz UHF radio with selectable transmission power. This provides compatibility with local radio-based workflows when the rover is paired with an appropriate base receiver and configured for the permitted frequencies and protocols in the country of use. Radio performance varies with antenna height, terrain, interference, configuration and local regulations.

Built for regular outdoor use

The SP30 SE receiver has an IP68-rated enclosure for protection against dust and water ingress. It is also specified to withstand a 1.5-metre pole drop and operate in temperatures from −20°C to +60°C. These characteristics make it suitable for regular work on active construction sites, roads, agricultural land and other demanding outdoor locations.

Despite its rugged housing, the receiver weighs approximately 1 kg. The compact design reduces the load at the top of the survey pole and makes the equipment easier to carry between points or transport between projects.

Battery capacity for full working days

The receiver contains a 7.4 V 10,000 mAh battery and is specified for more than 24 hours of rover operation under stated test conditions. Actual operating time depends on the communication method, radio settings, temperature, satellite environment and other field conditions.

The C100T controller offers up to 18 hours of operation. Together, the receiver and controller are designed to support long survey sessions while reducing the need to exchange batteries during normal fieldwork.

Applications for surveying construction GIS and drone work

For construction teams, the rover set can be used to stake out foundations, grids, utilities, road features and earthwork designs. It can also measure completed work for progress checks and as-built documentation. IMU tilt compensation is especially useful on busy sites where obstacles make conventional vertical-pole measurements slower.

Land surveyors can use the system for topographic data collection, control surveys, boundary-related measurements and general detail surveying. GIS professionals can record accurate positions for pipes, valves, inspection chambers, signs, trees and other assets while attaching codes and attributes through compatible field software.

Drone operators can measure ground control points and independent checkpoints for photogrammetry projects. Accurate ground coordinates help place aerial models within the required coordinate system and provide reference measurements for checking the completed dataset.

Choosing the correct rover configuration

A working RTK rover requires a suitable correction source. This may be a regional NTRIP service, a private reference network or a compatible local base station. Mobile network coverage, available correction formats, coordinate systems and radio regulations should be checked before field deployment.

Global GPS Systems can help buyers confirm the appropriate correction method, controller software, radio configuration and accessories for their intended workflow. This is particularly useful when replacing an existing rover, connecting to a third-party base station or preparing a first RTK system for construction, surveying or GIS work.