jiananmail wrote: |
My cars or the GPS: https://www.gps-data-team.com/convert/speed.php |
redadder wrote: |
Hi,
The gps speed is correct. Car speedos always read a bit low to err on the safety side of the fence. ![]() |
mikeman1485 wrote: |
I think the car would know how fast its going since its calculating it without sending to satellites and all that mess |
Anonymous wrote: |
- The most accurate speed reading is from Photo Enforcement cameras (redlight and speed cameras). They provide just under 100% correct reading. |
Anonymous wrote: |
GPS satellites are positioned in a geostationary orbit, at least 36,000 kilometres (22,500 mi) above your car. |
Anonymous wrote: |
Their margin of error can be up to 30 meters per a reading cycle. You can test how accurate is your GPS smartphone with this almost 20 years old GPS tool: |
Anonymous wrote: |
It is cool to use GPS speed as a guide, but do not rely on it (if caught speeding). |
Anonymous wrote: |
Dedicated GPS units perform much better than any ordinary smartphone. |
Anonymous wrote: |
You can check the reading error if you start the trip logger while sitting and sipping your morning coffee. The location marker will bounce non-stop. Do you still trust your GPS telling you how fast you are going? |
duane4 wrote: |
What evidence do you have to back this up? |
Anonymous wrote: |
1. Any way, GPS does not show the exact speed! GPS software uses averaging to ESTIMATE your speed. Car speedometer uses exact MEASUREMENT to display your speed. In my opinion (evidence level: ZZ) car speedometer wins. |
Anonymous wrote: |
2. Smartphones share processor speed with any background running application. These apps delay internal clock reading and increase the time dependent calculation errors |
Anonymous wrote: |
I checked my speed with an old Apple iPhone, and a new Samsung smartphone. I am deeply sorry to say that Apple wins. Samsung's processor is too busy to give any good (time dependent) reading. (It does not mean that the iPhone is a better phone). |
|
|
||