How Accurate Is a Septentrio GNSS Receiver? Real-World RTK Performance Data

An Eview receiver powered by a Septentrio module is rated at 0.6 cm + 0.5 ppm horizontal and 1 cm + 1 ppm vertical in RTK, with about 7 s initialisation. At 10 km from the base, the distance term adds about 5 mm horizontally. Holding that accuracy in the field depends on the antenna, the corrections, the sky view and the RF environment, which this guide explains.

The specifications

Measure	Value	Applies to
RTK horizontal	0.6 cm + 0.5 ppm	All Eview receivers
RTK vertical	1 cm + 1 ppm	All Eview receivers
RTK initialisation	About 7 s	mosaic-X5, mosaic-H, mosaic-G5
Heading (dual antenna)	0.15° at 1 m; 0.03° at 5 m	HB10, HB59, HB6 Pro, HB56H, HB51, HB50H, HB52H, HBEV322H
Pitch or roll	0.25° at 1 m; 0.05° at 5 m	Dual-antenna models
Max update rate	100 Hz (mosaic-X5, AsteRx-m3 Pro+); 20 Hz (mosaic-G5)	By model
Galileo HAS (no base)	Decimetre-level: under 25 cm horizontal in the initial service	mosaic-G5 products such as HBEV11

Module figures from Septentrio; HAS figures from EUSPA. More in RTK GNSS.

What reduces accuracy in the field

Distance to the base

The ppm term grows with baseline: 0.5 mm horizontally and 1 mm vertically per km. A local HB62 base or a nearby NTRIP station keeps it small.

Multipath

Reflections from buildings, vehicles and the ground bias range measurements. Septentrio APME+ mitigates multipath; a good antenna and mounting matter as much. See how choke ring antennas reduce multipath.

Interference

A receiver that loses lock produces no fix at all. Septentrio AIM+ on every Eview receiver mitigates narrowband, wideband, chirp and pulsed interference. See AIM+ and our JammerTest 2025 results.

Sky view and constellations

Tracking GPS, Galileo, GLONASS, BeiDou and QZSS together gives more satellites and better geometry under trees and between buildings. See multi-constellation GNSS.

Ionosphere

Scintillation, common at low latitudes after sunset, can break RTK fixes. Septentrio IONO+ keeps tracking through it. See RTK after sunset.

How to get the best accuracy from an Eview receiver

• Use a multi-band antenna matched to the job, such as the EV288 for survey and bases or the EV210 for drones.
• Keep the base within about 10–20 km, or run your own HB62.
• Separate the GNSS antenna from Wi-Fi, LTE and telemetry antennas, and route cables away from power wiring.
• Enable all constellations and use a sensible elevation mask (about 10°).
• Log raw data (SBF or RINEX) so you can check quality or post-process if needed.

Which Eview receiver for your accuracy need

• Surveying and GIS: HB62 base with HB6 or HBEV11 rover.
• Deformation monitoring: HB62 and HBEV11.
• Drone mapping: HB52 or HB6.
• Machine control: HB56H or HB10 for heading.

Talk to Eview

Tell us your platform, environment and quantity, and we will recommend the right Eview receiver and antenna. Email sales@gnss-solutions.com for pricing, datasheets and user manuals; we reply within 24 hours.

Frequently asked questions

How accurate is an RTK receiver with a Septentrio module?

Septentrio rates its modules at 0.6 cm + 0.5 ppm horizontal and 1 cm + 1 ppm vertical in RTK. Field results depend on baseline, antenna, multipath and sky view.

How much does distance to the base affect accuracy?

About 0.5 mm horizontally and 1 mm vertically per km, so about 5 mm and 10 mm extra at 10 km.

What accuracy do I get without a base station?

With Galileo HAS on mosaic-G5 products, decimetre-level accuracy (under 25 cm horizontal in the initial service). Centimetre accuracy needs RTK corrections.

How accurate is dual-antenna heading?

0.15° heading and 0.25° pitch or roll at a 1 m antenna spacing, improving to 0.03° and 0.05° at 5 m.

Which Eview receiver should I buy for survey work?

An HB62 base with an HB6 or HBEV11 rover is a common setup. Email sales@gnss-solutions.com for a quote.