Abstract. For the past 17 years, the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) instrument on the Canadian SCISAT satellite has been measuring profiles of atmospheric ozone. The latest two operational versions of the level 2 ozone data are versions 3.6 and 4.1. This technical note characterizes how both products compare with correlative data from other limb-sounding satellite instruments, namely MAESTRO, MLS, OSIRIS, SABER, and SMR. In general, v3.6, with respect to the other instruments, exhibits a smaller bias (which is on the order of ~3 %) in the middle stratosphere than v4.1 (~2–9 %), however the bias exhibited in the v4.1 data tends to be more stable, i.e. not changing significantly over time in any altitude region. In the lower stratosphere, v3.6 has a positive bias of about 3–5 % that is stable to within ±1 % dec⁻¹, and v4.1 has a bias on the order of −1 to +5 % and is also stable to within ±1 % dec⁻¹. In the middle stratosphere, v3.6 has a positive bias of ~3 % with a significant negative drift on the order of 0.5–2.5 % dec⁻¹, and v4.1 has a positive bias of 2–9 % that is stable to within ±0.5 % dec⁻¹. However, the v4.1 bias in the middle stratosphere is reduced to 0–5 % after being corrected for field-of-view modelling errors. In the upper stratosphere, v3.6 has a positive bias that increases with altitude up to ~16 % and a significant negative drift on the order of 2–3 % dec⁻¹, and v4.1 has a positive bias that increases with altitude up to ~15 % and is stable to within ±1 % dec⁻¹.

中文翻译：

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ACE-FTS 平流层臭氧数据质量评估

摘要。在过去的 17 年中，加拿大 SCISAT 卫星上的大气化学实验傅里叶变换光谱仪 (ACE-FTS) 仪器一直在测量大气臭氧的轮廓。2 级臭氧数据的最新两个运行版本是版本 3.6 和 4.1。本技术说明描述了这两种产品如何与来自其他肢体探测卫星仪器（即 MAESTRO、MLS、OSIRIS、SABER 和 SMR）的相关数据进行比较。一般来说，相对于其他仪器，v3.6 在平流层中间表现出比 v4.1 (~2-9%) 更小的偏差（大约 ~3%），但是偏差在v4.1 数据往往更稳定，即在任何海拔区域都不会随时间发生显着变化。在平流层下层，v3.6 有大约 3-5% 的正偏差，稳定在 ±1% dec^-1和 v4.1 具有 -1 到 +5 % 数量级的偏差，并且在 ±1 % dec ^-1范围内也稳定。在中间平流层，v3.6 有~3% 的正偏差，有 0.5-2.5% dec ^-1的显着负漂移，v4.1 有 2-9% 的正偏差，稳定到在±0.5 % dec ^{-1 内}。但是，经过视场建模错误校正后，平流层中部的 v4.1 偏差降低到 0-5%。在平流层上层，v3.6 有一个正偏差，随着海拔高度增加高达 ~16 % 和一个显着的负漂移大约 2–3 % dec ^-1，v4.1 有一个正偏差，随着海拔高度增加高达 ~15 % 并且稳定在 ±1 % dec ^-1以内。