The precision and accuracy of OFDA instruments when measuring the curvature of graticules - Updated analyses from 40 instruments

Abstract

The originally-circulated version of this paper included data from 22 OFDA100 and 6 OFDA2000 instruments (operating in 100 mode). This document updates the analyses to include 32 OFDA100 and 8 OFDA2000 instruments.

Valid data has now been obtained from the following countries: Australia (11), Bulgaria (1), Germany (3), Italy (9), Mongolia (1), New Zealand (10), Portugal (1), Spain (1), UK (1), and USA (2).

The conclusions are unaltered.

Citation

"The precision and accuracy of OFDA instruments when measuring the curvature of graticules - Updated analyses from 40 instruments", Peter Baxter, Commercial Technology Forum, Report 12, IWTO Barcelona Meeting, May 2002.