High accuracy sub‑meter positioning
Many industrial and leisure applications require higher accuracy than traditional GNSS provides, for example mapping, agricultural uses, marine navigation, construction, open‑sky warehouse management and location- based recreational applications such as geocaching and handheld golf rangefinders.
In some of these applications, Real Time Kinematic (RTK) or post‑processing can be used to achieve accuracy to millimeters at the cost of time or deployment of a local reference receiver. A much lower‑cost solution is based on Precise Point Positioning (PPP), a method that performs precise position determination to within a meter using a single receiver.
u‑blox’ PPP technology is made possible by stabilizing measurements of the distance between GNSS satellites and the receiver (pseudo‑ranges) using carrier phase tracking. Additional accuracy is achieved from ionospheric correctional data received from satellite‑based augmentation systems, such as WAAS (USA), EGNOS (Europe), MSAS (Japan) and upcoming GAGAN (India).
picture:[NEO‑7P GNSS module with PPP]
Unlike other PPP solutions that require a dual‑frequency receiver, u‑blox’ PPP solution uses a single‑frequency GPS receiver resulting in lower costs and power consumption.
u‑blox has implemented PPP in its NEO‑7P GNSS module, which also supports RTCM D‑GPS in standard point‑positioning mode for survey use. This stand‑alone high‑precision implementation requires no reference receiver deployment, is delivered as a compact (12.2 x 16.0 x 2.4 mm LCC) product, and integrates easily with u‑blox wireless modules to support high‑accuracy telematics applications.
The NEO‑7P (check NEO‑7 series) can be evaluated with the EVK‑7P kit with Precise Point Positioning. For samples of the NEO‑7P and evaluation kit, visit our Online Shop.