normalize[file_] :=
Module[{mtfile = OpenRead[file, BinaryFormat -> True], data, Mat},
SetStreamPosition[mtfile, 0];
data =  Partition[BinaryReadList[mtfile, "Real32", ByteOrdering -> 1],1297];
Close[mtfile];
Mat = Join[data[[All, ;; 45]], Transpose[Standardize /@ Transpose[data[[All, 46 ;; 47]]]], data[[All, 48 ;;]], 2];
BinaryWrite[file, Flatten@Mat, "Real32", ByteOrdering -> 1];];

FileByteCount["00010005.dat"]/2^10.
(*891.688*)

normalize["00010005.dat"];

FileByteCount["00010005.dat"]/2^10.
 (*8025.19*)