How can you find the best GNSS antennas for accurate positioning in land surveying tasks?

1 Antenna Types

When selecting a GNSS antenna for land surveying, understanding the different types available is crucial. Generally, you'll find geodetic antennas, which are designed for permanent installations and provide the highest accuracy. On the other hand, there are portable survey antennas, which are ideal for fieldwork due to their ruggedness and ease of setup. Your choice should hinge on the specific requirements of your surveying tasks, considering factors such as the environment, the required precision level, and the type of GNSS signals you intend to capture.

2 Key Features

Key features to consider when choosing a GNSS antenna include gain pattern, axial ratio, and noise figure. The gain pattern should be uniform to minimize signal loss at low elevation angles. A low axial ratio indicates better signal reception quality, which is particularly important when dealing with multi-path interference. Additionally, a low noise figure is desirable as it ensures that the antenna can pick up weak signals without being overwhelmed by background noise. These parameters collectively determine the antenna's ability to provide accurate and reliable positioning data.

3 Durability Needs

Durability is a non-negotiable aspect of GNSS antennas used in land surveying. You'll want an antenna that can withstand harsh environmental conditions such as extreme temperatures, moisture, and physical impacts. Look for antennas with high ingress protection (IP) ratings, which indicate their resistance to solids and liquids. A robust antenna ensures consistent performance over time, reducing the need for frequent replacements and maintaining the integrity of your survey data.

4 Compatibility Check

Compatibility with your existing survey equipment and software is essential when acquiring a new GNSS antenna. Ensure that the antenna can interface seamlessly with your data collectors, receivers, and processing software. This prevents potential integration issues that could compromise data accuracy or lead to additional costs for compatible equipment. It's also vital to consider future-proofing your investment by choosing an antenna that supports multiple constellations and frequencies, as this will allow for greater flexibility and longevity of use.

5 Budget Balance

Balancing budget with quality is a delicate task in selecting a GNSS antenna for land surveying. While it may be tempting to opt for the least expensive option, remember that antenna performance is directly linked to the quality of your survey results. Investing in a higher-quality antenna can lead to more accurate and reliable data, which can save you time and resources in the long run. Consider the total cost of ownership, including maintenance and potential downtime, when making your decision.

7 Here’s what else to consider

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