GPS positioning module delivers sub-meter accuracy

September 25, 2013 // By Julien Happich
The NEO-7P sub-meter GPS positioning module designed by u‑blox achieves standalone sub-meter precision based on single-frequency “Precise Point Positioning” (PPP) technology.

The device delivers autonomous sub-meter performance for most outdoor applications within coverage of Satellite Based Augmentation Systems (SBAS) throughout North America (WAAS), Europe (EGNOS), and Japan (MSAS).

In areas where SBAS is unavailable, the NEO-7P achieves high-accuracy based on Differential GPS (DGPS) positioning as an alternative to PPP. DGPS uses RTCM correction messages (correctional data defined by the “Radio Technical Commission for Maritime Services”) from a local reference station or aiding network to cancel out measurement error introduced by atmospheric distortion and variances in satellite orbits and clocks. The device comes in u-blox’ compact NEO Leadless Chip Carrier (LCC) module form factor. A UART, USB and I2C interface provide flexible connections to a host processor. It can also communicate directly with u‑blox’ SARA 2G, LISA 3G and TOBY LTE cellular modules.

The NEO-7P also provides complete GPS satellite raw data allowing further accuracy improvement based on post processing by an external host. Internal Flash memory allows simple firmware upgrades. The NEO-7P also supports Russian GLONASS Japanese QZSS positioning standards.

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