Columbus EX-1 Ultra-High Accuracy RTK GNSS Data Logger (Supports RTK, PPK, and standalone data logging; 30 cm accuracy in standalone mode; up to 1 cm accuracy with RTK or PPK)

RTK Mode

• Horizontal: 0.01 m + 1 ppm* (CEP)
• Vertical: 0.01 m + 1 ppm* (Median)
• Velocity: 0.05 m/s
• Dynamic Heading: 0.3°

Standalone SBAS Mode

• Accuracy: 0.3 m* (CEP)

* RTK figures measured with a 1 km baseline; ppm applies up to a 20 km baseline. Velocity and dynamic heading accuracy are based on 50% accuracy at 30 m/s during dynamic operation. SBAS accuracy is based on a 1-hour observation.

1. Standalone Mode

• Operates as a standalone GNSS receiver and data logger
• Independent logging—no internet, smartphone, or computer required
• Data saved to the microSD card
• About 30 cm accuracy in standalone use

2. RTK Rover Mode

• Functions as both an RTK GNSS receiver and a data logger
• Connect to an Android or Windows device to receive CORS / NTRIP corrections
• Achieve up to 1 cm accuracy for real-time positioning and track logging

3. RTK Base Mode

• Serves as an RTK base station providing real-time corrections to rovers
• Stream RTCM to an NTRIP Caster such as GeoAstra
• For best base performance, a dish antenna such as the BY500 is recommended

4. PPK Mode

• Requires two EX-1 devices recording simultaneously (one base, one or more rovers)
• Ideal for fieldwork, offline tasks, or sites without internet access
• During collection: antenna + storage card only—no phone or PC required
• After collection, post-process on a computer for track accuracy up to 1 cm CEP

The EX-1 is designed for continuous high-volume recording. Columbus validates 24-hour continuous logging at maximum data volume with fewer than one bad data point—even while recording NMEA, RTCM, and UBX (RAW) simultaneously at 10 Hz.

→ Built for long, dense logging sessions without fragile storage workflows

Three Primary Channels

USB-C — Data Port (Upload & Download): Download position data, upload NTRIP corrections, and configure device parameters.

Bluetooth — NTRIP SPP (Upload & Download): Download position data or upload NTRIP data over Serial Port Profile.

Bluetooth — SPP (Download Only): Download position data from the EX-1. SPP is widely supported on Windows and Android.

Three Extension Channels

Reserved for future hardware and app expansion as new peripherals become available.

USB-C — Link Port: For future peripherals such as an LTE modem.

Bluetooth — NTRIP BLE: App-level Bluetooth for direct interaction with iOS and Android apps.

Bluetooth — BLE: App-level Bluetooth connectivity for a range of iOS and Android apps.

1. RTK Rover Mode — Static Test

Demonstrated pinpoint precision with a CEP (50%) of 0.002633 m—better than the nominal 0.01 m specification.

2. RTK Rover Mode — Dynamic Test

Maintained accuracy even at ultra-low speeds, tracing a 20 cm radius path.

3. RTK Rover Mode — Dynamic Stability Test

Consistently tracked within a 1 cm margin over multiple laps.

4. Standalone Mode — Static Test

CEP (50%) accuracy was 0.240130 m, better than the nominal 0.3 m standalone specification.

• EX-1 Professional RTK GNSS Data Logger
• GNSS Antenna
• Bluetooth Transmit Antenna × 2
• USB Cable
• Warranty Card
• Helical Antenna Kit (Optional)

Time Album Pro is Columbus’s free desktop application for reviewing, editing, converting, and analyzing track data from Columbus GNSS data loggers. Open EX-1 NMEA, GPX, or other supported track files on a map, compare sessions with speed and altitude charts, and export to common GPS formats for further analysis.

• 14+ map styles, including Google Maps, Google Satellite, and OpenStreetMap
• Speed and altitude charts: time–speed, time–altitude, distance–speed, distance–altitude
• Track editing, conversion across 20+ GPS formats, and photo geotagging
• Windows, macOS (Apple Silicon and Intel), and Linux

Download Time Album Pro v3.6

Updated Aug 23, 2026. Linux builds require Java 17. Downloads are hosted on the official Columbus site (cbgps.com).