Can GPS Be Wrong – 11 Factors That Affect GPS Accuracy (And How To Improve It!)
If you’re here, you’re probably wondering how reliable your GPS tracker really is. We get it—accuracy matters when it comes to tracking your vehicles. But the truth is, GPS tracking isn’t always perfect. Things like tall buildings, signal interference, and even bad weather can mess with accuracy. So, can GPS tracking be wrong? Yep, it can. That’s why we’ve put together this simple guide to help you understand what affects your tracker’s accuracy and how to fix it.
We’ll walk you through the most common issues that interfere with GPS signals and share practical tips to boost accuracy. You’ll also find answers to questions like how to ensure your device collects the right data and what to do if you’re running into signal trouble. Let’s dive in!
By the end of this article, you’ll have a clear understanding of how GPS works, what can interfere with its accuracy, and how to get the most out of your device. Ready to dive in and make sure your GPS is working as accurately as possible? Let’s get started!
11 Examples Of What Can Cause GPS Accuracy To Be Wrong
|
Cause |
Description |
|
Signal Blockage |
Obstructions like buildings, forests, or mountains can block signals, causing interference and inaccuracy. |
|
Satellite Geometry |
Poor arrangement of GPS satellites can distort signals and reduce accuracy. |
|
Atmospheric Interference |
Conditions like ionosphere interference can distort signals, leading to inaccuracies. |
|
Receiver Design Features |
Quality and design of the receiver affect accuracy; cheaper receivers may be less accurate. |
|
Multipath Error |
Signals bouncing off surfaces like buildings or trees can cause inaccuracies. |
|
Cold Start |
After being off or in a new location, devices may take time to update, causing inaccuracy. |
|
Software/Firmware Issues |
Outdated or faulty software/firmware can affect accuracy; regular updates and calibration are essential. |
|
Signal Reflection |
Reflection off surfaces like buildings can distort signals, causing inaccuracies. |
|
Time of Signal |
Timing discrepancies in signal reception can affect accuracy. |
|
Weather Conditions |
Poor weather like rain, snow, or fog can cause atmospheric interference, leading to inaccuracies. |
|
GPS Application |
Different applications have varying accuracy levels; some may prioritize battery life over accuracy. |
Signal Blockage
When GPS signals can’t get through buildings, thick forests, or mountains, your tracker might struggle to stay accurate. If you're driving downtown or hiking in the woods, expect some interference.
Satellite Geometry
The way satellites line up at any given time affects GPS accuracy. If they aren’t spaced well in the sky, your GPS might get confused and give a slightly off reading.
Atmospheric Interference
GPS signals travel through the atmosphere, and things like solar activity or interference in the ionosphere can mess with them. It’s like trying to hear someone through static on the radio.
Receiver Design Features
Not all GPS devices are created equal. Cheaper ones might not have the same level of precision as high-quality models. The design makes a difference in how accurately your tracker picks up signals.
Multipath Error
Ever had a GPS tell you you’re somewhere you clearly aren’t? That’s probably multipath error, which happens when signals bounce off buildings or trees before hitting your device.
Cold Start
When you first power up a GPS or move it to a new place, it needs a little time to find its location. Until it updates, the readings might not be spot-on.
Software/Firmware Issues
If the software or firmware on your GPS is outdated or buggy, it can throw off your readings. Keeping your device updated helps it stay reliable and accurate.
Signal Reflection
When GPS signals reflect off glass buildings or smooth surfaces, it can confuse your tracker. This distortion makes it seem like you’re in the wrong spot.
Time of Signal
GPS works on precise timing. If there’s any delay in signal reception, your tracker might get things slightly wrong.
Weather Conditions
Rain, snow, and fog can interfere with GPS signals. When the weather takes a turn, your tracker’s accuracy might dip.
GPS Application
Different GPS systems serve different purposes. Some might focus more on saving battery life, sacrificing a bit of precision. For example, a GPS app for fitness might not be as accurate as one designed for navigation.
Learn more about how GPS tracking works here: https://fleet1st.io/blogs/post/how-gps-works
Ways To Improve GPS Accuracy – Reduce Wrong GPS Data
Reset Device With Cold Start
Over time, your GPS device may accumulate outdated or incorrect satellite information, which can cause inaccuracies in tracking. A cold start will reset the satellite information and allow your device to acquire new information, improving accuracy.
Update Firmware and Calibrate Software
GPS devices are designed to receive and interpret signals from GPS satellites. Over time, software and firmware updates may become available to improve the accuracy of the device. By keeping your device up-to-date, you can improve its accuracy.
Increase Signal Strength With External Antenna or Amplifier
In dense urban environments, valleys, or heavily wooded regions—GPS signals can get obstructed or become weak. To ensure you’re still getting accurate data, consider adding an external antenna or signal amplifier to your GPS tracking system. This upgrade helps strengthen the signal and reduce interference, making it easier to keep track of your fleet’s exact location, no matter where they’re operating.
Utilize Multiple Satellite Systems for Better Accuracy
If your GPS signal is spotty in areas with limited visibility, consider using multiple satellite systems like GPS and GLONASS. While GPS is the most common, adding systems like GLONASS, BeiDou, or Galileo can help fill in the gaps and give you more precise location data. Using multiple satellite networks boosts your chances of getting an accurate reading, even when one system is blocked or experiencing interference. So, if you want more reliable tracking, connecting to multiple satellite systems is a smart move!
Frequently Asked Questions
Yes, GPS signals can be affected by weather conditions, particularly by atmospheric interference. In general, clear weather conditions with a high visibility are optimal for accurate GPS tracking. However, poor weather conditions, such as heavy rain, snow, or fog, can affect the accuracy of GPS signals.
Yes, tall buildings and other obstacles can interfere with GPS accuracy by blocking or reflecting signals. This is known as the “urban canyon” effect. In cities, try to stay in open spaces and avoid areas with dense trees or tall structures to improve GPS performance.
To keep your GPS system accurate, make sure your firmware and software are up to date. Enable multiple satellite systems, such as GPS, GLONASS, or Galileo, for better coverage. Try to avoid areas with limited satellite visibility, and if needed, use an external antenna or signal booster to strengthen the signal.
No, GPS tracking devices can differ in accuracy depending on the quality of their receiver and the design features of the device. Higher quality GPS receivers tend to provide more accurate results.
GPS trackers are generally very accurate in determining latitude and longitude, with an accuracy range of up to 10 meters. However, factors such as atmospheric interference and satellite geometry can affect accuracy. For more precise results, use multiple satellite systems and check for firmware and software updates regularly.