Translation of "Narrowing down" in German

We're narrowing down topography with satellite.

I'm just narrowing down the window of its arrival.

We're narrowing it down, Reagan.

Now, are we narrowing it down, or aren't we?

You can use a combination of all the above filtering options when narrowing down the view.

In time a convergence and narrowing down of the scope of solutions is expected to happen.

You can use a combination of filtering options when narrowing down the view.