Emlid Reach RS3 – Multi-Band RTK GNSS Receiver for Surveying, Machine Control & Drone Base Stations

Yes. The RS3 delivers centimeter-level RTK accuracy (H: 7 mm + 1 ppm, V: 14 mm + 1 ppm) and PPK accuracy (H: 5 mm + 0.5 ppm), with advanced tilt compensation for faster point collection. Use it as a network rover over LTE connecting to provincial or state CORS and VRS services, pair two RS3 units over LoRa radio for RTK surveying anywhere you can see 8 km of sky, or log raw GNSS data for PPK post-processing. The Emlid Flow data collector app handles topographic surveys, stakeout, feature coding, coordinate transformations, and export to common CAD/GIS platforms. Many surveyors run the RS3 as their primary receiver; others add an RS4 to their kit when working under heavy canopy where L5/L6 multipath rejection matters.

Yes. The RS3 has a built-in LTE modem, nano-SIM slot, and full NTRIP support. Insert a SIM with a data plan, configure your network correction source (CORS, VRS, or commercial service like SmartNet or CanNet), and the RS3 operates as a single-receiver network rover — no base station required. Alternatively, connect over WiFi hotspot or Bluetooth tether to your phone if you prefer not to use the internal SIM.

The RS3 and RS4 are both multi-band RTK GNSS receivers built on the same Emlid Flow ecosystem, and both work as base, rover, or network rover. The RS3 tracks 184 channels across GPS L1/L2, GLONASS L1/L2, BeiDou, and Galileo. The RS4 is all-band, adding L5 and L6 frequencies with 672 channels and more constellations for improved multipath rejection under canopy and in urban environments. The RS4 also has a two-way UHF radio (the RS3's UHF is receive-only). Choose the RS3 for open terrain, machine control, and drone bases; choose the RS4 when your environment demands maximum constellation and frequency coverage.

The RX2 is a dedicated network-rover-only receiver — no base mode, no radios, no PPK logging. It's smaller, lighter, and less expensive than the RS3 because you're not paying for base-station capability. The RS3 is a full three-mode receiver: network rover, base station, or paired base/rover with LoRa radio. Choose the RX2 if you exclusively work off a network correction source. Choose the RS3 if you also need base-station capability for drones, machine control, jobsite RTK without cellular coverage, or PPK workflows.

Yes. Connect the RS3 and your DJI controller to the same WiFi network (a phone hotspot works), then use the free Emlid Caster service to stream corrections. Compatible with DJI Phantom 4 RTK, Matrice series, Mavic 3 Enterprise, and any drone supporting NTRIP RTCM3 corrections.

Yes. The RS3 outputs NMEA positioning data over Bluetooth, WiFi, RS-232, or USB-C to most RTK-capable machine control and auto-steer systems. Common use cases include ag auto-steer, tile drainage plows, land-forming blades, and grading equipment.

Up to 22 hours of logging, or 18 hours as an RTK rover with tilt compensation active. Charges via USB-C.

Emlid Flow on iOS and Android is included. Also compatible with Esri® ArcGIS® Field Maps, QField, Survey123®, and other third-party apps via Bluetooth NMEA output.

Yes. Two RS3 units pair over LoRa radio (915 MHz, up to 8 km line-of-sight, license-free in North America) for RTK surveying without needing cellular or NTRIP network access. You can also pair an RS4 base with an RS3 rover to take advantage of the RS4's all-band performance on the base side.

Yes. Log raw GNSS data in RINEX format to internal storage (16 GB), then post-process against your rover or drone flight data. PPK accuracy: H: 5 mm + 0.5 ppm, V: 10 mm + 1 ppm.

The RS3's UHF (410–470 MHz) is receive-only and requires a separate UHF antenna, sold separately. For two-way UHF transmission, the Reach RS4 or RS4 Pro is the better choice. The RS3's LoRa radio (915 MHz) is two-way and license-free in North America.

Yes. Northern Plains is an authorized Emlid dealer. Your unit ships with full Emlid warranty, and we handle warranty claims directly so you don't have to deal with overseas support queues.

Each Emlid Reach RS3 ships with: Reach RS3 receiver, Carrying case, USB Type-C cable, LoRa antenna (UHF antenna sold separately — required for UHF radio corrections input.)