Which statement best describes static GPS surveying?

• A. Static GPS surveying uses two or more stationary receivers simultaneously tracking the same satellites to determine relative positions.
• B. Static GPS surveying relies on post-processing without any base station.
• C. Static GPS surveying uses a single receiver and does not require reference coordinates.
• D. Static GPS surveying requires moving rovers during data collection.

Answer: (A)

Static GPS surveying relies on precision gained when two or more receivers stay fixed and track the same satellites over time, so you can determine the exact baseline between stations. By observing simultaneously, the carrier-phase measurements from the base and the rovers (or multiple bases) are used in post-processed calculations to derive accurate relative positions and tie them to a global or local reference frame. This is why the description of several stationary receivers observing the same satellites to determine their relative positions best captures the method. The other ideas don’t fit because a single receiver can’t establish baselines, static surveying uses fixed stations and post-processing to reference coordinates, and moving equipment during data collection contradicts the static nature of the method.