Precise Point Positioning (PPP) Ultra-precise GPS accuracy North
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Accuracy with PPP+SBAS (units in m)
Many stationary or slow-moving applications require higher accuracy than traditional GPS provides, for example surveying, mapping, agricultural, marine construction, open-sky warehouse management and location-based recreational applications such as geocaching and handheld golf rangefinders. These types of activities can allow for several minutes of data gathering and processing in order to provide much higher accuracy, typically below one meter. This can be achieved with expensive solutions such as Real Time Kinematic (RTK) systems that require a base station and multiple mobile units. A much lower-cost solution is based on Precise Point Positioning (PPP), a method that performs precise position determination using a single GPS receiver. u-blox’ PPP technology is made possible by an advanced algorithm that improves the accuracy of the perceived distance between GPS satellites and the receiver (GPS pseudorange) via carrier phase measurement.
Page 82 | Technology
Accuracy with GPS and SBAS (units in m)
Additional accuracy is achieved via ionospheric correctional data received from satellite based augmentation systems such as WAAS (USA), EGNOS (Europe) and MSAS (Japan). Unlike other PPP solutions that require a dual-frequency receiver, u-blox’ PPP solution requires only a singlefrequency GPS receiver resulting in lower costs. u-blox has implemented PPP in its NEO-6P GPS module. The stand-alone module requires no mobile units, is compact (12.2 x 16.0 x 2.4 mm LCC package) and integrates easily with u-blox wireless modules to support high-accuracy telematics applications.
NEO-6P GPS module with PPP