Alpha 5i RTK GNSS Rover Base Set with IMU and Controller

The Alpha 5i Rover Base Set is a complete RTK GNSS surveying system with Alpha 5i receivers configured as a base station and rover. The base generates correction data, while the rover uses those corrections to provide centimetre-level positioning in the field.

The set is designed for land surveyors, construction contractors, civil engineers, utility crews, mapping professionals and other users who need an independent high-accuracy GNSS solution for field measurement and stakeout work.

The system can be used for topographic surveys, construction layout, cadastral measurements, control surveys, road stakeout, earthworks, as-built surveys, utility mapping, volume calculations and other high-precision positioning tasks.

A rover and base set allows users to create their own local RTK correction source instead of relying entirely on a third-party correction network. This is useful in remote locations, areas without reliable mobile internet and projects where full control over the reference position is required.

Yes. Each Alpha 5i includes a UHF transceiver capable of receiving and transmitting data, so the receivers can be configured for base or rover operation through the field software.

Yes. After the base station has been installed and started, one operator can use the rover, controller and survey pole to collect or stake out points. The base should remain stable and undisturbed throughout the survey.

The specified RTK accuracy is ±(8 + 1 ppm) mm horizontally and ±(15 + 1 ppm) mm vertically under suitable conditions. Actual field accuracy depends on satellite geometry, base coordinates, baseline length, radio quality, multipath and the surrounding environment.

The Alpha 5i is designed to obtain an RTK fixed solution in approximately two seconds when it has suitable satellite visibility and is receiving valid correction data. Initialization may take longer near trees, buildings or other signal obstructions.

The receiver supports signals from GPS, GLONASS, Galileo, BeiDou, QZSS and SBAS. Multi-constellation and multi-frequency tracking improves satellite availability and helps the system perform in partially obstructed locations.

Each Alpha 5i receiver has 1,116 channels for tracking multiple satellite constellations and signal frequencies simultaneously.

The integrated IMU compensates for the angle of the rover pole, allowing the operator to measure points without keeping the pole perfectly vertical. This is useful beside walls, beneath obstacles, on slopes and at points that are difficult or unsafe to occupy directly.

The Alpha 5i is designed to support centimetre-level measurements with the pole tilted by up to approximately 60 degrees. Correct IMU initialization, pole-height entry and a fixed RTK solution are required for reliable results.

The base receiver calculates RTK correction data and transmits it through its integrated UHF radio. The rover receives those corrections through its own UHF radio and combines them with satellite observations to calculate a precise position.

The integrated UHF radio has a specified range of up to 16 km in favourable open and line-of-sight conditions. Terrain, buildings, vegetation, interference, antenna placement and permitted transmission power can reduce the practical range.

The built-in 1 W/2 W UHF transceiver operates within the 410–470 MHz range and supports both transmitting and receiving. The base and rover must use matching frequencies, protocols and correction settings.

No. The base can transmit corrections directly to the rover by UHF radio, allowing the system to operate without mobile internet. Internet connectivity may still be used for online maps, file transfer or network-based RTK corrections.

Yes. The Alpha 5i includes a 4G LTE modem and can receive compatible network corrections through DiMap Pro. A SIM card, mobile data coverage and valid credentials for the selected NTRIP or CORS service are required.

For repeatable results, the base should be installed over a known control point and configured with its verified coordinates. An averaged autonomous position can be used for relative work, but it may not align accurately with an official coordinate system or previous surveys.

A site calibration or translation check may be required when a local base is restarted at a different position or with different starting coordinates. DiMap Pro includes localization and point-calibration tools for aligning GNSS measurements with known project control.

The set is configured with Alpha 5i equipment for rover and base operation, an Alpha B55 data collector, DiMap Pro surveying software, a survey pole, controller bracket, tripod, tribrach and adapter. Charging equipment, UHF antennas and transport cases are also supplied according to the selected configuration. Exact quantities and components should be confirmed before ordering.

The set includes DiMap Pro surveying software for Android. It supports base and rover configuration, coordinate systems, localization, point collection, control surveys, point and line stakeout, road stakeout, CAD mapping, data import and export, and field calculation tools.

Yes. The Alpha 5i has 8 GB of internal storage and supports GNSS data recording in RINEX format for compatible static surveying and post-processing workflows.

Each receiver is specified for up to 25 hours of operation. Actual battery life varies with UHF transmission power, 4G use, Bluetooth activity, temperature, battery condition and operating settings. A receiver used as a transmitting base may consume power faster.

Yes. The receiver has an IP67 dust and water protection rating and is specified to survive a 2 m pole drop onto concrete or a 1.2 m free drop. Its operating temperature range is -30°C to +70°C.

Yes. Permitted frequencies, transmission power and licensing requirements differ by country or region. The system must be configured to use locally authorised radio settings, and the operator is responsible for complying with applicable regulations.

The Alpha 5i Rover Base Set is a complete RTK GNSS surveying system with Alpha 5i receivers configured as a base station and rover. The base generates correction data, while the rover uses those corrections to provide centimetre-level positioning in the field.

The set is designed for land surveyors, construction contractors, civil engineers, utility crews, mapping professionals and other users who need an independent high-accuracy GNSS solution for field measurement and stakeout work.

The system can be used for topographic surveys, construction layout, cadastral measurements, control surveys, road stakeout, earthworks, as-built surveys, utility mapping, volume calculations and other high-precision positioning tasks.

A rover and base set allows users to create their own local RTK correction source instead of relying entirely on a third-party correction network. This is useful in remote locations, areas without reliable mobile internet and projects where full control over the reference position is required.

Yes. Each Alpha 5i includes a UHF transceiver capable of receiving and transmitting data, so the receivers can be configured for base or rover operation through the field software.

Yes. After the base station has been installed and started, one operator can use the rover, controller and survey pole to collect or stake out points. The base should remain stable and undisturbed throughout the survey.

The specified RTK accuracy is ±(8 + 1 ppm) mm horizontally and ±(15 + 1 ppm) mm vertically under suitable conditions. Actual field accuracy depends on satellite geometry, base coordinates, baseline length, radio quality, multipath and the surrounding environment.

The Alpha 5i is designed to obtain an RTK fixed solution in approximately two seconds when it has suitable satellite visibility and is receiving valid correction data. Initialization may take longer near trees, buildings or other signal obstructions.

The receiver supports signals from GPS, GLONASS, Galileo, BeiDou, QZSS and SBAS. Multi-constellation and multi-frequency tracking improves satellite availability and helps the system perform in partially obstructed locations.

Each Alpha 5i receiver has 1,116 channels for tracking multiple satellite constellations and signal frequencies simultaneously.

The integrated IMU compensates for the angle of the rover pole, allowing the operator to measure points without keeping the pole perfectly vertical. This is useful beside walls, beneath obstacles, on slopes and at points that are difficult or unsafe to occupy directly.

The Alpha 5i is designed to support centimetre-level measurements with the pole tilted by up to approximately 60 degrees. Correct IMU initialization, pole-height entry and a fixed RTK solution are required for reliable results.

The base receiver calculates RTK correction data and transmits it through its integrated UHF radio. The rover receives those corrections through its own UHF radio and combines them with satellite observations to calculate a precise position.

The integrated UHF radio has a specified range of up to 16 km in favourable open and line-of-sight conditions. Terrain, buildings, vegetation, interference, antenna placement and permitted transmission power can reduce the practical range.

The built-in 1 W/2 W UHF transceiver operates within the 410–470 MHz range and supports both transmitting and receiving. The base and rover must use matching frequencies, protocols and correction settings.

No. The base can transmit corrections directly to the rover by UHF radio, allowing the system to operate without mobile internet. Internet connectivity may still be used for online maps, file transfer or network-based RTK corrections.

Yes. The Alpha 5i includes a 4G LTE modem and can receive compatible network corrections through DiMap Pro. A SIM card, mobile data coverage and valid credentials for the selected NTRIP or CORS service are required.

For repeatable results, the base should be installed over a known control point and configured with its verified coordinates. An averaged autonomous position can be used for relative work, but it may not align accurately with an official coordinate system or previous surveys.

A site calibration or translation check may be required when a local base is restarted at a different position or with different starting coordinates. DiMap Pro includes localization and point-calibration tools for aligning GNSS measurements with known project control.

The set is configured with Alpha 5i equipment for rover and base operation, an Alpha B55 data collector, DiMap Pro surveying software, a survey pole, controller bracket, tripod, tribrach and adapter. Charging equipment, UHF antennas and transport cases are also supplied according to the selected configuration. Exact quantities and components should be confirmed before ordering.

The set includes DiMap Pro surveying software for Android. It supports base and rover configuration, coordinate systems, localization, point collection, control surveys, point and line stakeout, road stakeout, CAD mapping, data import and export, and field calculation tools.

Yes. The Alpha 5i has 8 GB of internal storage and supports GNSS data recording in RINEX format for compatible static surveying and post-processing workflows.

Each receiver is specified for up to 25 hours of operation. Actual battery life varies with UHF transmission power, 4G use, Bluetooth activity, temperature, battery condition and operating settings. A receiver used as a transmitting base may consume power faster.

Yes. The receiver has an IP67 dust and water protection rating and is specified to survive a 2 m pole drop onto concrete or a 1.2 m free drop. Its operating temperature range is -30°C to +70°C.

Yes. Permitted frequencies, transmission power and licensing requirements differ by country or region. The system must be configured to use locally authorised radio settings, and the operator is responsible for complying with applicable regulations.