Page | 99
Points to Ponder
You now understand how observation errors can be turned into positional errors. You know how errors propagate and how they can be combined in a Matrix to generate an ellipse of uncertainty. Inevitably with over 30 individual sources of error, the implementation of this in software is a very complex business. In a previous version of this book, we added chapter 19, a detailed description of all aspects of the ISCWSA error model. This was a very comprehensive piece of work by Dr Andrew McGregor. With his permission I have reduced the chapter to a reference to a new appendix as we had complaints from readers who were losing the will to live in the depths of the Eigen Values. Do please read the entire appendix if you suffer from Sleep Deprivation or have a professional need to understand the detail.
CONTENTS
Made with FlippingBook flipbook maker