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Alpha 5i GNSS RTK Receiver
The Alpha 5i GNSS RTK Receiver is a professional multi-frequency GNSS receiver designed for high-precision surveying, mapping and construction applications. It combines high-speed GNSS positioning with an integrated inertial measurement system and built-in long-range UHF radio for efficient field RTK workflows.
The 5i is designed to provide fast satellite searching and RTK fixing while supporting tilt measurement up to 60°. Its integrated radio can provide a typical working range of 8–12 km depending on field conditions, making it suitable for base-and-rover surveying without relying entirely on cellular correction networks.
With a lightweight 780 g design and up to 25 hours of operating time in rover mode, the Alpha 5i is suitable for extended field surveying.
RTKSurvey.com supplies the Alpha 5i for professional surveying, construction and mapping applications.
Key Features
1116-channel multi-frequency GNSS positioning
Multi-constellation satellite tracking
0–60° IMU tilt measurement
Integrated long-range UHF radio
8–12 km radio coverage depending on conditions
Fast satellite acquisition and RTK fixing
Up to 25 hours of rover operation
Lightweight 780 g receiver
DiMap field surveying software support
Core Specifications
GNSS channels: 1116
RTK accuracy: H ±(8 mm + 1 ppm), V ±(15 mm + 1 ppm)
Static accuracy: H ±(2.5 mm + 0.5 ppm), V ±(5 mm + 0.5 ppm)
Tilt measurement: Up to 60°
IMU update rate: 400 Hz
UHF frequency: 410–470 MHz
UHF radio: Integrated transceiver
Radio range: 8–12 km
Operating time: Up to 25 hours
Weight: Approx. 780 g
Protection: IP67
Operating temperature: -30°C to +70°C
Applications
Land surveying
Topographic mapping
Construction surveying
Engineering surveying
Cadastral surveying
Road and infrastructure projects
GIS field data collection
Base and rover RTK surveying
