In GPS accuracy metrics, which term refers to the geometric strength of satellite configuration affecting accuracy?

In GPS accuracy metrics, which term refers to the geometric strength of satellite configuration affecting accuracy?

• A. Real-time kinematic differential GPS
• B. Differential correction
• C. Dilution of precision
• D. Post processed kinematic positioning

Answer: (C)

Dilution of precision is the measure of how satellite geometry affects the propagation of measurement errors into the position estimate. When satellites are spread widely across the sky, the geometry is strong and DOP is low, leading to more accurate positioning. If the satellites bunch together and sit in a small portion of the sky, the geometry is weak and DOP is high, increasing the impact of measurement errors on the final fix. The other terms describe methods for improving accuracy (like applying corrections or using carrier-phase techniques) rather than the geometric factor that governs how geometry amplifies or mitigates errors.

Dilution of precision is the measure of how satellite geometry affects the propagation of measurement errors into the position estimate. When satellites are spread widely across the sky, the geometry is strong and DOP is low, leading to more accurate positioning. If the satellites bunch together and sit in a small portion of the sky, the geometry is weak and DOP is high, increasing the impact of measurement errors on the final fix. The other terms describe methods for improving accuracy (like applying corrections or using carrier-phase techniques) rather than the geometric factor that governs how geometry amplifies or mitigates errors.