Research and White Papers for Scalable GPS Infrastructure and VRS
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“GPS Antenna Design and Performance Advancements: The Trimble Zephyr Antenna” white paper, Trimble 2001

The Trimble Zephyr and Zephyr Geodetic antennas are two new types of survey-grade, dual-frequency, GPS antenna. They are designed to match the performance of the chokering antenna, while being smaller, lighter, and significantly less expensive.