Carlson BRx7 RTK GNSS Rover Base Set with IMU Tilt

The Carlson BRx7 Rover and Base Set is a complete professional RTK GNSS surveying solution built around two BRx7 multi-frequency receivers. One receiver operates as the fixed base station while the second is used as the mobile rover, providing centimetre-level positioning for surveying, construction and mapping work.

The set is designed for land surveyors, construction contractors, civil engineers, site engineers, utility contractors, infrastructure teams, mapping professionals and other users who need an independent high-precision GNSS base-and-rover system.

Typical applications include topographic surveying, cadastral surveying, construction stakeout, road and infrastructure projects, earthwork checks, utility mapping, as-built measurement, site control, volume surveys and GIS data collection.

A base-and-rover set generates its own local RTK corrections and does not depend entirely on access to a third-party correction network. This makes it useful in remote locations, areas without network RTK coverage and projects where users want greater control over the reference position and correction link.

Yes. Either BRx7 receiver can be configured as a base, rover or network rover. This allows the equipment to be adapted for different projects, used with a VRS or NTRIP network, or combined with other compatible GNSS equipment.

Yes. When used with compatible Carlson field software, the system can stake out points, lines, grades, alignments, surfaces and design positions. It can also collect as-built measurements and verify completed construction work.

With a fixed RTK solution and a reliable correction link, the system can achieve centimetre-level positioning. The published BRx7 RTK accuracy is 8 mm plus 1 ppm horizontally and 15 mm plus 2 ppm vertically under suitable conditions.

Each receiver supports multiple frequencies from GPS, GLONASS, Galileo, BeiDou, QZSS and NavIC, also known as IRNSS. The BRx7 is also Atlas L-band capable when the appropriate correction service is activated.

Each BRx7 receiver has more than 800 tracking channels. This enables simultaneous tracking of many satellite signals and helps improve availability, initialization and positioning performance in changing field conditions.

The published initialization time is less than 10 seconds under favourable conditions. Actual initialization time depends on satellite visibility, correction quality, baseline length, atmospheric conditions and nearby obstructions.

The rover’s integrated tilt sensor calculates the position of the pole tip when the pole is not held vertically. This makes it easier to measure points near walls, buildings, trenches, fences, vehicles and other obstacles without levelling the pole for every observation.

The published tilt accuracy is approximately 2 cm with a 1.8-metre pole at angles up to 30 degrees and approximately 5 cm at angles up to 60 degrees. Results depend on the RTK solution, pole height, calibration and local field conditions.

Corrections can be transmitted through the integrated UHF radios or over a cellular internet connection using a compatible service such as Carlson Listen-Listen. The most suitable method depends on site size, terrain, mobile coverage and local radio regulations.

Yes. The BRx7 supports internal UHF radio communication in the 410–470 MHz and 902.4–928 MHz frequency ranges, depending on the receiver version. Available frequencies and permitted transmission settings vary by country.

UHF range depends on antenna height, terrain, obstructions, radio power, interference and local regulations. Open areas with a clear line of sight generally provide better range than urban, wooded or hilly environments.

Carlson Listen-Listen is a cloud-based service that sends corrections from a BRx7 base to one or more rovers through the cellular data network. It can reduce the line-of-sight and distance limitations associated with a conventional UHF radio link. A compatible Carlson software setup and service subscription may be required.

Yes. A single BRx7 base can support multiple simultaneous rover connections when used with a compatible communication configuration, including supported Carlson Listen-Listen workflows.

The BRx7 supports common RTK correction formats including RTCM 2.1, RTCM 2.3, RTCM 3.0, RTCM 3.1, RTCM 3.2 with MSM, CMR and CMR+. Compatibility should be checked when integrating the system with other receivers, networks or software.

The set includes Carlson SurvPC or SurvCE surveying software, depending on the selected controller and configuration. The software supports base and rover setup, coordinate systems, point collection, stakeout, data logging and file import or export.

The standard set includes two Carlson BRx7 GNSS receivers, a Carlson RT4 data collector, Carlson SurvPC or SurvCE software, a rover pole with data collector bracket, and base-station accessories including a tripod, tribrach and adapter. Exact contents should be confirmed for the selected configuration.

No third-party RTK network is required when one BRx7 is used as the local base and corrections are sent directly to the rover by UHF radio. A mobile data plan or service subscription may be required when using internet-based correction methods such as Listen-Listen.

For work that must match an established coordinate system, the base should normally be positioned over a known control point or assigned accurate coordinates. An averaged autonomous base position may be suitable for local or relative work, but it does not automatically provide accurate global coordinates.

Yes. Both receivers can record raw and static GNSS observations. Data can be stored in the 8 GB internal memory or on a compatible microSD card and downloaded through the receiver’s web interface for post-processing or quality assurance.

Each BRx7 can operate for up to approximately 12 hours with two fully charged batteries. Actual runtime depends on radio transmission, cellular use, temperature, receiver settings and battery condition.

Yes. Each receiver uses two removable hot-swappable batteries. One battery can be replaced while the second continues to power the receiver, helping prevent interruptions during fieldwork.

Yes. The BRx7 receivers have an IP67 environmental rating and are designed for professional outdoor use in dust, rain and demanding job-site conditions. Their published operating temperature range is approximately -30°C to +65°C.