Talk:Tellurometer

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Accuracy claims

The article contained the claim: "Accuracy (sub-heading) The models available included a 100km position fixing system which was able to measure up to 1km with an accuracy of 0.6mm."

I have removed this claim as I cannot find this claim in any of the references given, or in any searches I have done, and I have found two indications that it is not correct.

This claim possibly comes from [1] [2] (both these go to the same place - but I have given both just in case) but I think it has been misquoted. This source states "The product range included a 100km position fixing system, with fixed remote stations and a ship borne master station as well as three optical EDMs, the last of which was able to measure up to 1 km with an accuracy of 0.6 mm." Note that it is a "product range" that "include 100km position fixing system" and *not* models of Tellurometer. It is *optical* (not microwave) EDMs that are credited the 0.6 mm accuracy.

This source [3] states "This error, in Tellurometer, ranges from 0.0 to 0.08 meters..." and this contradicts the claim. (I know that, taken literally, this source states that the error could be zero - but I think this is written somewhat loosely, and I don't think it can be taken as support for the 0.6mm claim.)

FrankSier (talk) 19:34, 4 July 2011 (UTC)[reply]

You are absolutely correct. I operated the MRA1A model in the late 60's in the Royal Australian Survey Corps, and from memory it achieved reliable accuracies of around 0.1m over 30-60 km. Multiple readings over various meteorological conditions and applying triangulation in conjunction with tellurometer distances enabled corrected distances to be resolved to be within 30mm. Again this is from memory over 50 years ago. 220.253.101.32 (talk) 04:22, 26 June 2023 (UTC)[reply]