What type of GPS measurement is produced using both code phase and carrier phase signals?

The type of GPS measurement that utilizes both code phase and carrier phase signals is known as Carrier and Code Phase Measurements. This methodology enhances the accuracy and reliability of GPS positioning by integrating two different measurement techniques.

Code phase measurements are based on the time it takes for the GPS signal to travel from the satellite to the receiver, while carrier phase measurements take into account the wave-like nature of the GPS signals, measuring the phase of the carrier wave itself. By combining these two types of measurements, a surveyor can significantly improve the precision of the positioning data, allowing for more accurate calculations of location.

In contrast, autonomous GPS relies solely on standard code phase measurements without enhancing accuracy through additional methods. Differential GPS, on the other hand, improves the accuracy of GPS by using ground-based reference stations but does not specifically encompass the dual measurement approach using both code and carrier phases. Real-Time Kinematic (RTK) GPS also utilizes carrier phase measurements but is primarily focused on providing precise real-time positioning through additional corrections, typically from a fixed base station, rather than explicitly combining code and carrier phase measurements. Thus, the combination characteristic defines the Carrier and Code Phase Measurements specifically as the correct response.