What’s single-beam bathmetry?
Principle of single-beam echo sounder
Composition of single-beam echo sounder

To achieve high-precision positioning, it is essential to consider not only the accuracy of the satellite system itself but also the impact of factors such as the DOP values.

Satellite Laser Ranging (SLR) and Very-Long-Baseline Interferometry (VLBI) are modern geodetic techniques used for accurate measurement and positioning.

Why are there people saying that "I am using WGS84 (ITRF96)"？
What does the ITRF do?
What is the relationship between ITRF and WGS84 coordinate system?
So how to determine the epoch and frame of conventional RTK and TAP services?

Receiver Independent Exchange Format (RINEX) is a standard data format widely used in GNSS survey applications.

To mitigate ionospheric influence on GNSS positioning, avoid unfavorable conditions, choose suitable observation times, and utilize real-time ionospheric monitoring.