What is Differential GPS (DGPS)?

Differential GPS, or DGPS, is like having a super-smart friend who helps you find your way more accurately.

Imagine you're playing hide and seek in a big park. You use a map to know where you are, but sometimes the map isn’t perfect, it might tell you you’re near the swings when you’re actually near the slide. That’s like regular GPS, which uses satellites to figure out your location.

Now, imagine your friend has another map and can see exactly where you are. They tell you how far off your map is, so you can adjust your guess. That’s what DGPS does, it uses a special receiver that gets corrections from a known place, like a lighthouse or a cell tower, to make your location more accurate.

Think of GPS satellites as the teacher who gives out clues about where you are on the playground. But sometimes those clues aren’t perfect, maybe they’re a little fuzzy.

That’s when DGPS steps in like a helper who knows exactly where the teacher is and helps you understand the clues better. It subtracts the fuzziness, so you know almost exactly where you are, just like knowing whether you're at the slide or the swings!