This document shows how to swap a Trimble Zephyr GNSS Antenna for a Trimble Choke Ring GNSS Antenna. Read More

This article presents a comparison of measured signal to noise ratio (SNR) values observed from several  GNSS antenna types. The results presented below were collected using a monument located on the UNAVCO Facility Roof in Boulder, CO. Each... Read More

UNAVCO Resources: GNSS Antennas Dual frequency (L1/L2) Choke Ring Antennas provide geodetic-quality GNSS measurements for surveying, mapping, and research applications. Typical dual-frequency choke ring antennas maintain a stable phase center that... Read More