SKG122ER RTK Positioning Module

2026-06-22/ By Admin

Built-in cm-level RTK algorithm + multi-system single-frequency, delivering high-performance positioning at a competitive price point

Supports GPS/BeiDou/GLONASS/Galileo/QZSS, cold start ≤28s, RTK accuracy 2.5cm+1ppm, ultra-compact 16×12.2mm form factor — ideal for in-car navigation, vehicle tracking, personal navigation devices, and more.

Why Choose a Cost-Effective RTK Positioning Module?

In automotive navigation, vehicle monitoring, and personal navigation applications, positioning modules must deliver high accuracy while balancing cost and power consumption. Traditional single-frequency, single-system modules lack the precision required for lane-level navigation. High-end multi-frequency RTK modules, while accurate, come with a premium price tag that limits adoption in cost-sensitive projects.

How can you achieve centimeter-level RTK positioning within a limited budget? The SKG122ER RTK positioning module provides the answer — it integrates an RTK solution engine, supports all major global satellite systems, and offers ultra-compact size, rapid start-up, and industrial-grade reliability. It's the "low-cost, high-precision" positioning core for automotive navigation, vehicle tracking, and personal navigation applications.

Six Core Advantages — Redefining Cost-Effective RTK

1. Built-in RTK Algorithm for Centimeter-Level Precision

The module integrates an RTK real-time kinematic engine — no external solver required. When paired with RTK differential correction services (such as CORS networks or private base stations), it achieves horizontal positioning accuracy of 2.5cm + 1ppm in RTK fixed mode. This meets the demands of lane-level navigation and high-precision vehicle tracking. It also supports D-GNSS differential positioning with accuracy better than 1 meter (CEP) for applications requiring sub-meter precision without full cm-level performance.

2. Multi-Constellation, Single-Frequency Reception for Global Availability

The module supports GPS L1, BeiDou B1I, GLONASS L1, Galileo E1, QZSS L1, and SBAS (WAAS/EGNOS/MSAS/GAGAN/SDCM), with 40 acquisition/tracking channels. It delivers robust satellite availability across Asia-Pacific, Europe, North America, and other regions, ensuring continuous and reliable positioning. The single-frequency design effectively manages power consumption and cost while maintaining excellent accuracy.

3. Ultra-Fast Start-Up & High Sensitivity for Weak-Signal Environments

• Cold start: ≤28 seconds
• Hot start: ≤1 second
• Re-acquisition: ≤1 second
• Tracking sensitivity: -162dBm
• Acquisition sensitivity: -148dBm

In challenging environments such as tree cover or urban canyons, the module quickly acquires and stably tracks satellite signals, minimizing initialization wait times.

4. Compact Size & Low Power for Space-Constrained Designs

• Package dimensions: 16.0mm × 12.2mm × 2.4mm
• Weight: only 1.6 grams
• Operating voltage: 3.0V–3.6V
• Peak current: only 47mA (typical)

Ideal for automotive navigation boxes, portable devices, handheld terminals, and other space-limited applications.

5. Active Antenna Detection & Protection for Enhanced Reliability

The module features built-in active antenna open/short circuit detection:

• Load current 0–2mA: Detected as open circuit
• Load current 2–20mA: Normal operating state
• Load current ≥45mA: Short circuit detected — antenna power supply automatically disabled to protect the module

This prevents positioning failures or module damage caused by antenna faults.

6. Rich Interfaces & Flexible Configuration

Provides UART (up to 460800bps), I²C, SPI, GPIO, EXTINT, and USB 2.0 interfaces for seamless integration with various host systems. Supports NMEA-0183 protocol and RTCM 2.3–3.3 differential data input. The data update rate is configurable up to 20Hz, meeting the needs of dynamic scenarios.

Technical Specifications

General Information

Positioning Performance

Start-Up & Sensitivity

Electrical & Environmental

Interfaces & Peripherals

Typical Applications

• Automotive Navigation: Provides high-precision positioning for in-car navigation systems; RTK mode supports lane-level guidance.
• Vehicle Tracking & Security Systems: Real-time vehicle position tracking with support for geofencing, overspeed alerts, and more.
• Personal Navigation Devices: Handheld navigators and outdoor adventure equipment — high sensitivity ensures reliable positioning in complex environments.
• Remote Vehicle Monitoring: Position management and route replay for logistics fleets, special-purpose vehicles, etc.; D-GNSS mode delivers sub-meter accuracy.
• Low-Cost RTK Applications: Cost-sensitive projects requiring centimeter-level accuracy, such as shared bike positioning, agricultural machinery navigation, and more.

Development Support & Customization Services

SKYLAB provides comprehensive development resources for the SKG122ER, including reference designs, layout guidelines, antenna matching recommendations, and technical support. The module supports firmware upgrades and parameter configuration, with customizable output protocols, update rates, and serial baud rates available upon request. Evaluation kits are also offered to help customers validate RTK performance in real-world environments.

Empowering Scalable Automotive & Navigation Applications with Cost-Effective RTK

The SKG122ER RTK positioning module combines built-in RTK algorithms, multi-constellation reception, ultra-fast start-up, and an ultra-compact form factor into a single, high-performance package. It delivers a "high-precision, cost-effective" positioning core for automotive navigation, vehicle tracking, personal navigation, and beyond. With the SKG122ER, centimeter-level positioning is no longer exclusive to premium equipment — it's now accessible for a wide range of cost-sensitive projects, enabling broader adoption of high-accuracy GNSS technology across the industry.