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The “Trimble PROXRT-2 GLONASS with Zephyr Geodetic Model 2” is more than just GPS + GLONASS. Here’s a breakdown of what “Zephyr Geodetic Model 2” enables, and what capabilities are typical of systems with that antenna, based on product data:

What Zephyr Geodetic Model 2 gives you

According to Trimble’s and its distributors’ specs:

• The Zephyr Geodetic 2 antenna supports GPS modernization signals (that means newer GPS frequencies, not just the original L1/L2).

• It supports GLONASS (multiple bands) and probably modern GLONASS signals.

• It also supports Galileo and BeiDou in many cases, or at least has been advertised to be compatible with “all existing and proposed public GNSS signals.

So it’s more multi-GNSS than just GPS + GLONASS. It’s designed for high accuracy base-station/reference applications (e.g. “control work”), with good multipath rejection, low-elevation tracking, very stable phase center, etc.

• The ProXRT-2 receiver is a dual-frequency GPS (L1/L2) decimeter / high-precision receiver with Trimble H-Star/OmniSTAR support and an optional GLONASS tracking package. It can be shipped/installed with GLONASS enabled, but GLONASS is not necessarily present on every unit — it’s an option/upgrade.

• The Zephyr Geodetic Model 2 antenna is multi-GNSS capable (GPS L1/L2/L5 modernization signals, GLONASS, and advertised compatibility with Galileo / BeiDou / future signals). That means the antenna will receive those signals, but whether the receiver processes them depends on the ProXRT configuration/firmware/options.

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This post includes:

• Trimble PROXRT-2 GLONASS

• Zephyr Geodetic Model 2 antenna