High Accuracy Kinematic Gps Performance Using a Digital Beam- Steering Array

In this paper, the performance of a digital beam steering antenna array, developed by NAVSYS Corporation, is presented for high accuracy differential and kinematic GPS applications. The NAVSYS’ High Gain Advanced GPS Receiver (HAGR). uses digital beam-steering to combine signals from an antenna array with up to sixteen elements and create a multi-beam antenna for up to eight GPS satellites simultaneously. This has the effect of applying up to 10 dB of additional antenna gain on the GPS satellite signals. The additional gain provided improves the accuracy of the pseudo-range and carrierphase observations, and the directivity of the digital beam created from the antenna array also reduces multipath errors. In this paper test data taken from the HAGR using NAVSYS’ kinematic GPS navigation software is presented.