Crissa
Well-known member
- First Name
- Crissa
- Joined
- Jul 8, 2020
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- Santa Cruz
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- 2014 Zero S, 2013 Mazda 3
That depends.Yea it's more difficult, but it's more accurate.
Simple radar sees pulsed returning from surfaces - but surfaces can be anything from air or objects; and different objects will return a different density of return. So an overhead sign and a bridge look exactly the same to radar. And a flock of insects or birds looks like a rainshower. If you've used a fishfinder with raw output, this is what that looks like. And sometimes you're looking at rocks deep in the mud instead of fish.
The next kind of radar only sees the difference in speed between two objects. It does it because waves reflecting off an object will have their signals slightly changed in the reflection. But the problem here is that things which are going at the same speed as the background look the same as not being there at all. So a stopped car looks the same as the road.
The most recent 'high definition' radar can actually see more than distance and speed. It gives you shapes. That's useful! But it's also expensive. And... Is it really giving more and new data than the many cameras you already need, being used for parallax?
-Crissa
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