CST Level 1 Land Surveyor Certification Practice

Which satellite signal type is known for higher accuracy and is often used in GPS technology?

1. L1 C/A

2. L5C

3. L2C

4. L3I

The correct answer is: L5C

The B option, L5C, is recognized for its higher accuracy and improved capabilities in positioning and navigation services. It operates on a frequency that is part of the modernized GPS signals and is designed to enhance the performance of GNSS (Global Navigation Satellite Systems) by providing a higher power level, better robustness against interference, and sophisticated signal structures. This makes it particularly effective in challenging environments, like urban canyons or dense foliage. L5C's features, such as the ability to transmit better-quality signals with greater integrity monitoring and improved multipath mitigation techniques, contribute greatly to achieving more precise positional accuracy compared to the other signal types listed. It is primarily used for safety-of-life applications, such as aviation, where accurate positioning is crucial. In contrast, the other options, such as L1 C/A, L2C, and L3I, while they also serve navigation functions, do not offer the same level of accuracy or robust performance enhancements that L5C provides. Understanding the capabilities of these signals is essential for land surveyors and technical professionals in the field of navigation and positioning.