How to choose your GNSS Antenna

Global Navigation Satellite System (GNSS) technology has become an integral part of modern land surveying and construction projects. We explore the key factors to consider when choosing the best GNSS antenna for your land surveying and construction projects. 

1. Accuracy Requirements

The first step in selecting a GNSS antenna is to define the accuracy requirements of your project. Different applications, such as geodetic surveying or construction site layout, may have varying precision needs. High-precision antennas are essential for tasks like monitoring deformation or conducting topographic surveys, while construction layout tasks may require slightly lower accuracy.

2. Frequency Bands

GNSS signals operate within specific frequency bands, and it's crucial to choose an antenna that supports the required signals for your region. Common bands include L1, L2, L5 for GPS, and G1, G2, G5 for GLONASS. Multi-constellation antennas that support signals from multiple satellite systems (GPS, GLONASS, Galileo, BeiDou) can enhance reliability and accuracy.

3. GNSS Antenna Design

There are various antenna designs available, each with its advantages and disadvantages. Consider the environmental conditions of your survey or construction site, as some antennas may be more suitable for challenging environments with obstructions or interference for example the Zenith16. For a more cost effective, light weight and  easy to use GNSS rover you can look at the Zenith06 

4. Multi-Frequency vs. Single-Frequency

Multi-frequency antennas can receive signals from multiple GNSS  constellations, providing redundancy and improved accuracy. Single-frequency antennas are more cost-effective but may lack the robustness and precision of multi-frequency options. The choice depends on the specific needs of your project and budget constraints. Adding a correction service like ProNet will increase the accuracy of your surveying and construction jobs.

5. Signal Multipath Mitigation

Multipath interference occurs when satellite signals reflect off nearby surfaces, leading to measurement errors. Antennas with advanced multipath mitigation technologies like the Zenith16  help minimise these errors. Look for antennas with ground planes or features designed to reduce multipath effects, especially in construction sites with reflective surfaces. Understanding the key differences between GPS and GNSS  will help you to decide on the correct antenna for your project. 

6. Robustness and Durability

Construction and surveying environments can be harsh, with exposure to weather, dust, and potential physical damage. Select antennas that are rugged, waterproof, and built to withstand challenging conditions. Robust construction ensures the longevity of the equipment and reliable performance in the field.

7. Compatibility with Receivers

Ensure compatibility between the GNSS antenna and the receiver you plan to use. Different manufacturers may have specific requirements or recommendations for antenna models that work optimally with their receivers. Zenius08 UT12

8. Power Consumption

Efficient power consumption is crucial for fieldwork, especially in remote locations without easy access to power sources. Choose antennas that strike a balance between power consumption and performance to maximise operational efficiency during extended surveying sessions.

Selecting the best GNSS antenna will help you collect accurate and reliable data. By considering factors such as accuracy requirements, frequency bands, antenna design, and environmental conditions, you can make informed choices that align with the unique demands of your projects. 

We offer free project consultations and demos to help you choose the correct equipment for your project. 

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