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    CHCNAV iBase GNSS

    The CHCNAV iBase is a GNSS base station receiver that broadcasts RTK corrections to your rovers for reliable centimetre-accurate positioning across the site. Rugged and easy to set up, it's a dependable foundation for base-and-rover survey work. Supplied and supported in the UK by Tri-Site Survey Equipment.

    Regular Price £6,000.00
    Features: iBase + Mains Power Kit and Magmount
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    Product Features

    DistLink for 30km Full Range

    Self-developed DistLink technology, deeply integrated with CHCNAV's proprietary GNSS differential data compression, significantly reduces transmission volume and boosts radio sensitivity by 30% — enabling rovers to receive corrections from up to 30km away.

    Integrated & Rugged Design

    An integrated design eliminates external batteries and cables, in an industrial-grade body rated IP67 for dust and water resistance with an IK08 shock rating for durability.

    Advanced Multipath Mitigation

    Advanced multipath mitigation algorithms ensure high-quality corrections are transmitted to rovers, improving positioning accuracy for optimal performance in challenging environments.

    13H+ Worry-Free Runtime

    An upgraded new-generation radio with optimised transmission strategies cuts power consumption by 33%, pushing base-station runtime beyond 13 hours. That eliminates mid-work battery changes or spare batteries across a full field day.

    Detailed Specifications

    Integrated all-in-one base station:

    The iBase removes the need for external batteries, radio modems, antenna cables, and additional accessories by integrating everything directly into a single compact receiver. Compared with conventional external-radio base station setups, this dramatically simplifies deployment and reduces setup time in the field. For survey crews working across multiple locations in a day, this means faster mobilisation and fewer equipment-related delays. 

    Long-range 5W UHF Transmission:

    The iBase features a built-in 5-watt UHF radio capable of delivering RTK corrections up to 25 km in optimal conditions. This allows reliable base-to-rover communication across large construction sites, infrastructure corridors, and remote survey areas without relying solely on mobile networks. Intelligent UHF interference self-checking automatically identifies the best frequency channel for stable operation. 

    Full GNSS Tracking and Reliable RTK Performance:

    Supporting GPS, GLONASS, Galileo, BeiDou, QZSS, SBAS, and PPP services, the iBase provides robust multi-constellation tracking for dependable RTK corrections in challenging environments. Advanced multipath mitigation algorithms improve positioning stability near buildings, trees, and reflective surfaces where lower-grade systems may struggle to maintain a fix. 

    Built-in 4G LTE Connectivity:

    Beyond traditional UHF workflows, the iBase includes integrated 4G LTE connectivity for transmitting GNSS corrections over TCP/IP and NTRIP services. This allows the receiver to operate as a network base station or even a UHF repeater on large projects. Combined with Wi-Fi, Bluetooth, and NFC, the iBase supports flexible connectivity options for modern survey operations.

    Rugged Industrial Design:

    Designed for demanding field conditions, the iBase features an industrial-grade housing with IP67 protection against dust and water ingress alongside IK08 impact resistance. The receiver is engineered to withstand harsh construction and infrastructure environments, including accidental drops from tripod height onto hard surfaces. 

    Extended Battery Performance:

    The iBase's dual removable batteries provide up to 12 hours of continuous operation while transmitting RTK corrections at full 5W power output. Reduced power consumption improves operational efficiency without compromising UHF transmission performance. For full-day survey operations, this reduces downtime and minimises battery management requirements. 

    GNSS Accuracies (RMS)
    • RTK: H: 8mm + 1ppm / V: 15mm + 1ppm; initialisation <10s, reliability >99.9%
    • PPK: H: 3mm + 1ppm / V: 5mm + 1ppm
    • Post-Processing Static: H: 2.5mm + 0.5ppm / V: 5mm + 0.5ppm
    • High-Precision Static: H: 2.5mm + 0.1ppm / V: 3.5mm + 0.4ppm
    • Static & Rapid Static: H: 2.5mm + 0.5ppm / V: 5mm + 0.5ppm
    • Code Differential: H: 0.4m / V: 0.8m
    • Autonomous: H: 1.5m / V: 2.5m
    • Positioning Rate: Up to 10Hz
    • Time to First Fix: Cold start <45s; Hot start <10s; re-acquisition <1s
    IMU & Tilt
    • IMU Update Rate: 200Hz, AUTO-IMU
    • Tilt Angle: 0–60°
    • RTK Tilt-Compensated: Additional horizontal uncertainty typically <8mm + 0.7mm/° tilt down to 30°
    • Tilt Sensor: E-Bubble levelling
    Hardware
    • Size: Ø160.5mm × 103mm
    • Weight: 1.73kg (3.81 lb)
    • Front Panel: 0.96" OLED display, 2 LEDs
    • Data Storage: 8GB memory
    Communication
    • Wireless Pairing: NFC
    • Wi-Fi: 802.11/n, access point mode
    • Bluetooth: v5.0
    • Network Modem: Integrated 4G — LTE (FDD) B1/B2/B3/B4/B5/B7/B8/B20; DC-HSPA+/HSPA/UMTS B1/B2/B5/B8; EDGE/GPRS/GSM 850/900/1800/1900MHz
    • UHF Radio: 410–470MHz, up to 5W; protocols CHC/DistLink/Transparent/TT450/Satel; range typical 8–12km, optimal up to 30km with DistLink (typical 5–8km, up to 25km with other protocols)
    • Ultra Base: Simultaneous radio and network differential data transmission
    • DistLink: New-generation UHF radio data transmission for all-day operation and long-distance range
    • Ports: 1× 7-pin LEMO (external power, RS-232); 1× UHF antenna (TNC female)
    • Data Formats: RTCM 2.x, RTCM 3.x, CMR I/O; HCN, RINEX 2.11/3.02; NMEA 0183; NTRIP Client/Caster
    Electrical
    • Battery: 2× 7,000mAh, 7.4V Li-ion
    • Power Consumption: 12W (depending on settings)
    • Operating Time: UHF base up to 13h (DistLink), 8–10h (other protocols); Static up to 25h
    • External Power Input: 9V DC to 28V DC
    Environment
    • Operating Temperature: -40°C to +65°C
    • Storage Temperature: -40°C to +85°C
    • Humidity: 100% non-condensing
    • Ingress Protection: IP67 (temporary immersion to 1m)
    • Shock: Survives 2m pole-drop
    • Standards: NGS Antenna Calibration; IEC 62133-2:2017+A1; IEC 62368-1:2014; EN 62368-1:2014+A11:2017; UN Manual Section 38.3

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    Use Cases

    Infrastructure Survey

    Topographic Survey

    Large Site RTK Coverage

    Road & Highway Survey