using System.Linq;
var str = " 1 29.670 2.000 1546.547 0.507 1.483";
var strArr = str.Split(' ').Where(x => x != string.Empty).ToArray();
It is not optimal, but can help you filter your result as you wish in future, but the fastest way is using options in Split() method as in one of the coments to your post .Split(' ', System.StringSplitOptions.RemoveEmptyEntries)
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