What is GPS drift?

What is GPS Drift?

GPS drift is the difference between your actual physical location and the location recorded by a GPS receiver. 

All GPS systems have some amount of drift—including smartphones, fitness trackers, and navigation systems. Consumer GPS devices can sometimes drift by 16 feet or more depending on environmental conditions.

If you are considering a GPS dog fence, understanding GPS drift is important because it affects how precisely your dog’s boundary is detected.

The amount of drift a GPS system experiences depends on several factors, including:

• The quality of the GPS receiver and antenna
• The number of satellites available
• The amount of open sky visible from the ground
• Environmental interference from trees, buildings, or terrain

A helpful way to think about GPS drift is to compare it to the ocean’s tides. The tide ebbs and flows throughout the day depending on the moon’s gravitational pull. While the shoreline moves slightly in and out, it always stays within a predictable range between high tide and low tide.

GPS behaves in a similar way. Because satellites are constantly orbiting the Earth, the signals used to determine location can shift slightly over time. Just like the tide line moves a little further out on some days than others, the calculated GPS position may move slightly within a small range. This natural movement is what we call GPS drift.

 The amount of drift a GPS system experiences depends on several factors, including:

• The quality of the GPS receiver and antenna
• The number of satellites available
• The amount of open sky visible from the ground
• Environmental interference from trees, buildings, or terrain

Several environmental and technical factors can cause GPS signals to become less accurate.

SIGNAL REFLECTION (MULTI-PATH INTERFERENCE)
Satellite signal can bounce off structures like houses, barns, or metal roofs, causing the GPS receiver to interpret an incorrect position.

DENSE NEIGHBORHOODS OR TALL BUILDINGS
In areas where buildings are close together, satellite signals may become partially blocked or reflected, increasing drift.

HILLS AND VALLEYS
If your property sits in a valley or uneven terrain, the GPS receiver may see fewer satellites, which reduces accuracy.

HEAVY TREE COVER
Thick forest canopy can weaken satellite signals before they reach the receiver.

SpotOn systems are specifically engineered to maintain accuracy in environments like:

• Dense forests
• Mountainous terrain
• Properties with metal structures
• Suburban yards with nearby homes or landscaping
  
  

Even with modern GPS systems, it’s still recommended to design your fence with a safety buffer between your boundary and hazards like roads or neighboring properties.

SpotOn recommends planning at least 15 feet between your boundary and unsafe areas to ensure your dog always has a safe space to respond to training tones.

Returning to the tide analogy, think of your fence boundary like the safe shoreline for your dog. While GPS positioning may shift slightly within a small range—just like tides moving in and out—the boundary remains predictable. Building in a buffer ensures your dog always has room to safely respond to training cues before reaching any hazards.

SpotOn collars reduce GPS drift using patented True Location™ technology, which combines satellite positioning with motion sensors inside the collar.

These sensors continuously track your dog’s:

• Direction
• Speed
• Acceleration

Using over 5 million hours of real-world dog movement data, SpotOn’s system processes this information with proprietary algorithms to determine your dog’s True Location™—a more precise estimate than GPS alone can provide.

The SpotOn Nova Edition represents the most advanced GPS hardware the company has ever built into a dog collar.

Nova improves location accuracy and dramatically reduces drift through a “Triple Threat” hardware architecture:

• Dual-band, dual-feed GPS antenna
• Dual-feed GPS receiver
• Patented True Location™ positioning system

This combination captures cleaner satellite signals from more angles, allowing the system to maintain precise boundaries even in environments where GPS traditionally struggles.

🛰️ Access to More Satellites
SpotOn Nova can access 151 satellites across four global satellite systems:GPS, GLONASS, Galileo, and BeiDou.

More satellites mean the system can calculate location more accurately and maintain stronger coverage, especially when signals are partially blocked.

Nova features the largest GPS antenna in the virtual dog fence industry—over 5× larger than antennas used in other GPS fence systems.

More antenna surface area means:

• Stronger satellite signal capture 
• Better resistance to interference
• Improved performance under trees or near structures

This hardware advantage contributes to independently verified accuracy under 5 feet and up to 11× less GPS drift in challenging environments.

Thanks to its upgraded hardware and patented positioning technology, the SpotOn Nova Edition delivers some of the most accurate GPS containment available today.

Key performance improvements include:

• Accuracy under 5 feet (independently tested)
• 11× less GPS drift in challenging environments
• Reliable containment in forests, near buildings, and across rugged terrain

The result is a virtual fence where:

• Boundaries stay exactly where you draw them
• Alerts trigger precisely when they should
• Training cues remain clear and consistent for your dog
  
  
  

Even with advanced GPS technology, good fence planning is still important.

We recommend:
1. Creating your fence boundary using the SpotOn app
2. Testing your boundary by walking it with your dog
3. Adjusting the fence if needed to ensure the boundary sits where expected

With Nova’s improved accuracy and reduced drift, many properties—including those as small as ⅓ acre—can now achieve dependable GPS containment.

GPS drift is a natural part of satellite positioning, but modern GPS containment systems are designed to minimize its effects.

SpotOn’s Nova Edition addresses drift using:

• Patented True Location™ technology
• A 5× larger GPS antenna 
• A dual-band, dual-feed GPS architecture 
• Access to 151 satellites across four global systems

Together, these technologies deliver industry-leading accuracy and reliable containment, giving dogs the freedom to roam while providing owners with peace of mind.

The SpotOn Nova Edition GPS Dog Fence delivers the most accurate and reliable virtual fencing technology available today.

With patented True Location™ technology, a 5× larger GPS antenna, and access to 151 satellites, Nova keeps boundaries precise—even in forests, near buildings, or across rugged terrain. 

No wires to bury.
No base stations to install.
No subscription required for core fencing features. 

Just draw your fence in the app and let your dog explore safely.

Shop the SpotOn Nova Edition today and experience GPS fencing at its most advanced.