GNSS Blogs
Beyond First-Order Correction: Understanding Higher-Order Ionospheric Effects in GNSS
The ionosphere is one of the largest natural error sources affecting GNSS positioning accuracy. For decades, researchers and engineers have focused primarily on correcting the first-order ionospheric delay, which represents...
Beyond First-Order Correction: Understanding Higher-Order Ionospheric Effects in GNSS
The ionosphere is one of the largest natural error sources affecting GNSS positioning accuracy. For decades, researchers and engineers have focused primarily on correcting the first-order ionospheric delay, which represents...
Why RTK Requires a Base Station: How Centimeter-Level Positioning Works
Why can RTK achieve centimeter-level accuracy while standalone GNSS is typically accurate only to a few meters? The answer isn't simply a better receiver—it's the base station. While standard GNSS...
Why RTK Requires a Base Station: How Centimeter-Level Positioning Works
Why can RTK achieve centimeter-level accuracy while standalone GNSS is typically accurate only to a few meters? The answer isn't simply a better receiver—it's the base station. While standard GNSS...
DGNSS vs RTK: What's the Difference and Which One Do You Need?
When using standard GNSS, your position may be accurate enough to identify the road you are on. However, for applications such as UAV mapping, robotics, precision agriculture, and land surveying,...
DGNSS vs RTK: What's the Difference and Which One Do You Need?
When using standard GNSS, your position may be accurate enough to identify the road you are on. However, for applications such as UAV mapping, robotics, precision agriculture, and land surveying,...
A Critical Lesson We Learned from a Field GNSS Test
A Practical Lesson from a PPP Field Test In high-precision GNSS systems, engineers often focus on satellite availability, signal quality, multi-constellation fusion, and algorithm performance such as PPP (Precise Point...
A Critical Lesson We Learned from a Field GNSS Test
A Practical Lesson from a PPP Field Test In high-precision GNSS systems, engineers often focus on satellite availability, signal quality, multi-constellation fusion, and algorithm performance such as PPP (Precise Point...
How Satellite Orbit Errors Affect GNSS Accuracy
Why can a GNSS receiver still produce positioning errors even under open skies? Many people associate GNSS accuracy mainly with factors such as antenna quality, satellite visibility, multipath, or atmospheric...
How Satellite Orbit Errors Affect GNSS Accuracy
Why can a GNSS receiver still produce positioning errors even under open skies? Many people associate GNSS accuracy mainly with factors such as antenna quality, satellite visibility, multipath, or atmospheric...
How Tropospheric Delay Affects High-Precision GNSS Positioning
When using GNSS for applications such as navigation, surveying, or RTK positioning, it is easy to assume that positioning accuracy mainly depends on the receiver, antenna, or the number of...
How Tropospheric Delay Affects High-Precision GNSS Positioning
When using GNSS for applications such as navigation, surveying, or RTK positioning, it is easy to assume that positioning accuracy mainly depends on the receiver, antenna, or the number of...