After considering the referee reports and your responses and after my own reading of your manuscript I am recommending that you should undertake major revisions. The methods and equations need to be carefully stated and explained with considerably more detail than is currently presented. The uncertainty in your method and data need to be carefully assessed and explained. You have not presented clear evidence of how useful your method is. The manuscript in general is quite hard to follow and more explanations are needed. Please take note of these comments and those more detailed comments of the referees when undertaking your revisions.

Thankyou for your substantial efforts in revising the manuscript. The Technical Note is now much more understandable and there is substantial additional technical information to assist the reader. I find the manuscript acceptable for publication in its current form.