string Mystr = "01.62 00.83 100.76";
string Leftstr = Mystr.Substring(0, 5); // Leftstr is equal to 01.62 
string Midstr = Mystr.Substring(6, 5);  // Midstr00.83
string Rightstr = Mystr.Substring(Mystr.Length - 5, 5);  // Rightstr 00.76

using System;
using System.Collections.Generic;
 
namespace daniweb
{
  class MultiArray
  {
    private static string[] GetTestData()
    {
      List<string> result = new List<string>();
      result.Add("return1.MV TE244654.MV b43tgwg.sp");
      result.Add("01.62 00.83 100.76");
      result.Add("01.62 00.83 100.77");
      result.Add("01.60 00.83 100.78");
      result.Add("--.-- 00.83 100.79");
      result.Add("--.-- 00.82 100.80");
      result.Add("01.63 00.83 100.81");
      result.Add("01.63 00.83 100.82");
      result.Add("--.-- 00.83 100.83");
      result.Add("--.-- 00.83 100.84");
      result.Add("01.62 00.83 100.85");
      result.Add("01.59 00.83 100.86");
      result.Add("--.-- 00.83 100.88");
      result.Add("--.-- 00.83 100.89");
      result.Add("01.61 00.84 100.90");
      result.Add("01.60 00.84 100.91");
      return result.ToArray();
    }
    internal static void DoWork()
    {
      string[] testData = GetTestData();
      int xLen = testData[0].Split(new char[] { ' ' }, StringSplitOptions.None).Length;
      int yLen = testData.Length;
      string[,] result = new string[xLen, yLen];
 
      for (int iY = 0; iY < testData.Length; iY++)
      {
        string[] fields = testData[iY].Split(new char[] { ' ' }, StringSplitOptions.None);
        if (fields.Length != xLen)
          throw new Exception("You have a varying number of columns....");
 
        for (int iX = 0; iX < fields.Length; iX++)
        {
          result[iX, iY] = fields[iX];
        }
      }
      System.Diagnostics.Debugger.Break();
    }
  }
}