title: Uncertainty of ozone measurements with the primary standard reference photometer (SRP45).
abstract: A comparison of the ozone primary reference standard photometer serial number 45 (SRP45) against the National Institute of Standards and Technology (NIST) instruments, serial number 0 (SRP0) and 2 (SRP2), has been performed in order to establish the traceability and comparability of ozone measurements made by the Chilean atmospheric science community. A complete uncertainty budget was developed for SRP45, using a GUM approach. The results of the comparisons allow us to conclude that SRP45, SRP0 and SRP2 are comparable according to international criteria over an ozone mole fraction range of 0 nmol mol(-1) to at least 500 nmol mol(-1). The official result for the validation of SRP45 is x(ozone)(SRP45)=[0.013+0.99806x(ozone)(SRP2)] nmol mol(-1) with an expanded uncertainty of [Formula in text] from 0 to 500 nmol mol(-1).
authors: Centro de Ciencias Ambiental, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile. manleiva@uchile.cl
authors: Manuel A G
authors: MA
authors: Leiva
authors: Consuelo C
authors: CC
authors: Araya
authors: Carlos
authors: C
authors: Mancilla
authors: Rodrigo
authors: R
authors: Seguel
authors: James E
authors: JE
authors: Norris