Discussion

There is an ambiguity in the number of iterations used to converge the answer. This ambiguity involves a tradeoff between processing time and solution accuracy. We addressed this with the extra processing power available on the school PCs to ensure an accurate solution. It should be noted that this is not a viable solution on a handheld GPS receiver.

Since we do not know the confidence interval of the pseudo-ranges, we can not establish an absolute confidence interval on our estimate. Within the solution however, the confidence interval is quite small because the only source of error is the initial guess. Therefore, an approximate confidence interval would be a few meters assuming reliable pseudo-ranges.

None of the real world factors were considered. Our group took the pseudo-ranges to be reliable when in the real world they are not, due to multi-path fading and ionosphere delay among many others.