A choke ring antenna reduces multipath by surrounding the GNSS antenna element with concentric conductive rings that act as a high-impedance ground plane, attenuating reflected satellite signals arriving from below the horizon. The rings suppress low-elevation multipath by 20–40 dB before it reaches the element — the difference between meter-level code errors and centimeter-level RTK accuracy…
RTK GNSS for Construction Machine Control: Precision Earthmoving Without the Stakes If you are running a heavy civil or site-development operation, you already know the drill: grade stakes every few meters, a survey crew checking cut and fill, and the inevitable rework when the blade goes a couple of centimetres too deep. RTK GNSS for…
Septentrio mosaic-X5 vs mosaic-G5 P3H: What Is the Difference and Which Should You Choose? Septentrio offers two main OEM GNSS module lines: the mosaic-X5 (flagship) and the mosaic-G5 P3H (professional). While both deliver centimeter-level RTK accuracy and AIM+ anti-jamming, they differ in channel count, anti-spoofing capability, and advanced features. This guide breaks down the differences…
RTK vs PPK for Drone Mapping: Which GNSS Correction Method Should You Use? If you fly drones for mapping, surveying, or inspection, you have two options for achieving centimeter-accurate positioning: RTK (Real-Time Kinematic) and PPK (Post-Processed Kinematic). Both use the same underlying principle — differential corrections from a base station — but they apply those…
GNSS Anti-Jamming vs Anti-Spoofing: What Every Engineer Needs to Know If you work with GNSS for drones, autonomous vehicles, or critical infrastructure, you need to understand the difference between anti-jamming and anti-spoofing. These two technologies protect against fundamentally different threats, yet they are often confused. This guide explains the difference, how each technology works, and…
How to Choose a GNSS Antenna: A Complete Technical Guide for Engineers Selecting the right GNSS antenna is one of the most overlooked factors in achieving reliable centimeter-level positioning. You can pair a $5,000 receiver with a $20 antenna and get worse results than a $500 receiver with a $200 antenna — because the antenna…
NTRIP, RTCM, and RINEX: A Complete Guide to GNSS Correction Data Formats for Engineers If you work with RTK GNSS for UAVs, autonomous vehicles, or precision surveying, you need to understand three acronyms: NTRIP, RTCM, and RINEX. They are the foundation of how centimeter-accurate positioning gets from a reference station to your moving receiver. This…
Septentrio AsteRx-m3 Pro+: Resilient GNSS Board Revolutionizing Port Automation
The Problem: Jamming and Interference Are Everywhere GNSS signals arrive at Earth’s surface at extremely low power — roughly equivalent to a 20-watt light bulb viewed from 20,000 km away. Any nearby radio transmitter can overwhelm them. Common sources of GNSS interference: Telecommunications towers (4G/5G, Wi-Fi hotspots) Power lines and solar inverters (broadband harmonics) Nearby…
RTK GNSS (Real-Time Kinematic Global Navigation Satellite System) is not strictly required for all drones, but it is essential for any UAV application that demands centimeter-level positioning accuracy — precision agriculture, powerline inspection, surveying, mapping, and automated landing. Standard GNSS (GPS/GLONASS/Galileo) delivers 2-5 meter accuracy, which is sufficient for basic visual-line-of-sight flight and waypoint navigation….
