The more signals a receiver can access the more information it can gather from available satellites. For example for the Galileo constellation multi-frequency receivers make use of 5 signals, while dual-frequency receivers can make use of only 2 signals. This makes positioning of multi-frequency receivers more reliable in areas where the number of visible satellites is limited. Multi-frequency receivers also improve positioning accuracy by resolving ionospheric errors which happen as GNSS signals pass through the atmosphere.
Metal fences around the construction site not only block low-elevation satellites but also generate reflected GNSS signals causing “multipath”. Advanced tracking technology such as APME+ reduces the errors caused by the reflected signals to minimize the impact on the positioning calculation. This allows the receivers to work better under multipath, which can occur around large smooth structures, buildings or rock faces.
Shock and vibration resilience
Excavators were digging in a rocky bed sustaining harsh vibrations and shocks. Algorithms such as LOCK+ ensure smooth tracking even during rapid changes of the antenna position.
An excavator cab can make a full rotation in under 5 seconds. At this speed even a small delay of reported position can result in a wrong digging location. Having a high update rate with low latency ensures a stable control loop and a smooth digging plan execution.
“Robust GNSS receivers in our guidance systems helped us get the reputation we needed to become number one machine control company in Norway in under two years,“ said Ruben Hensen, Chief Operating Officer at Makin. “Septentrio application engineers were always there to answer our questions and help with system optimization.”
GNSS positioning technology for toughest environments
Accurate machine guidance speeds up construction projects by over 30% and reduces CO2 emissions by cutting down fuel consumption. Such guidance systems depend on accurate positioning, but the built-in GNSS receivers require advanced technology to be able to operate in challenging environments such as near high rock faces, under foliage or close to large structures. By using robust high-quality receivers in machine control systems, saves machine idling costs and repair costs ensuring smooth project execution and completion. Some GNSS providers work together with their clients to optimize and fine-tune their positioning solutions to their client’s specific needs. As Makin’s excavators demonstrated, GNSS with advanced technology and algorithms works in the most challenging environments. Tough GNSS, helping get the toughest jobs done.
Watch this video to find out how excavator operators benefit from robust GNSS built into the Makin guidance system.
- Brochure: GNSS Interference - how to detect and mitigate
- Brochure: GNSS spoofing - how to detect and protect your receiver
- Customer Story: Machine control systems that work in the most challenging environments