The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) was a limb-viewing infrared Fourier transform spectrometer that operated from 2002 to 2012 aboard the Environmental Satellite (ENVISAT). The final re-processing of the full MIPAS mission Level 2 data was performed with the ESA operational version 8 (v8) processor. This MIPAS dataset includes not only the retrieval results of pressure–temperature and the standard species H₂O, O₃, HNO₃, CH₄, N₂O, and NO₂ but also vertical profiles of volume mixing ratios of the more difficult-to-retrieve molecules N₂O₅, ClONO₂, CFC-11, CFC-12 (included since v6 processing), HCFC-22, CCl₄, CF₄, COF₂, and HCN (included since v7 processing). Finally, vertical profiles of the species C₂H₂, C₂H₆, COCl₂, OCS, CH₃Cl, and HDO were additionally retrieved by the v8 processor.The balloon-borne limb-emission sounder MIPAS-B was a precursor of the MIPAS satellite instrument. Several flights with MIPAS-B were carried out during the 10-year operational phase of ENVISAT at different latitudes and seasons, including both operational periods when MIPAS measured with full spectral resolution (FR mode) and with optimised spectral resolution (OR mode). All MIPAS operational products (except HDO) were compared to results inferred from dedicated validation limb sequences of MIPAS-B. To enhance the statistics of vertical profile comparisons, a trajectory match method has been applied to search for MIPAS coincidences along the 2 d forward and backward trajectories running from the MIPAS-B measurement geolocations. This study gives an overview of the validation results based on the ESA operational v8 data comprising the MIPAS FR and OR observation periods. This includes an assessment of the data agreement of both sensors, taking into account the combined errors of the instruments. The differences between the retrieved temperature profiles of both MIPAS instruments generally stays within ±2 K in the stratosphere. For most gases – namely H₂O, O₃, HNO₃, CH₄, N₂O, NO₂, N₂O₅, ClONO₂, CFC-11, CFC-12, HCFC-22, CCl₄, CF₄, COF₂, and HCN – we find a 5 %–20 % level of agreement for the retrieved vertical profiles of both MIPAS instruments in the lower stratosphere. For the species C₂H₂, C₂H₆, COCl₂, OCS, and CH₃Cl, however, larger differences (within 20 %–50 %) appear in this altitude range.

中文翻译：

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使用 MIPAS-B 测量对 MIPAS ESA 运营产品进行长期验证

用于被动大气探测的迈克尔逊干涉仪 (MIPAS) 是一种临边观察红外傅里叶变换光谱仪，于 2002 年至 2012 年在环境卫星 (ENVISAT) 上运行。完整的 MIPAS 任务 2 级数据的最终重新处理是使用 ESA 运行版本 8 (v8) 处理器执行的。该 MIPAS 数据集不仅包括压力-温度和标准物种 H ₂ O、O ₃、HNO ₃、CH ₄、N ₂ O 和 NO ₂的检索结果，还包括更难的体积混合比的垂直剖面 -回收分子 N ₂ O ₅ , ClONO ₂、CFC-11、CFC-12（自 v6 处理起包括在内）、HCFC-22、CCl ₄、CF ₄、COF ₂和 HCN（自 v7 处理起包括在内）。_{最后，C 2} H ₂、C ₂ H ₆、COCl ₂、OCS、CH ₃物种的垂直剖面Cl 和 HDO 由 v8 处理器额外检索。气球携带的临边发射探测器 MIPAS-B 是 MIPAS 卫星仪器的前身。在 ENVISAT 的 10 年运行阶段，在不同纬度和季节进行了几次 MIPAS-B 飞行，包括 MIPAS 以全光谱分辨率（FR 模式）和优化光谱分辨率（OR 模式）测量的两个运行时期。所有 MIPAS 操作产品（HDO 除外）都与从 MIPAS-B 的专用验证肢体序列推断的结果进行了比较。为了加强垂直剖面比较的统计，轨迹匹配方法已被应用于沿着从 MIPAS-B 测量地理位置运行的二维前向和后向轨迹搜索 MIPAS 巧合。本研究基于包含 MIPAS FR 和 OR 观察期的 ESA 运行 v8 数据概述了验证结果。这包括评估两个传感器的数据一致性，同时考虑仪器的综合误差。两种 MIPAS 仪器检索到的温度曲线之间的差异通常保持在平流层中为±2  K。对于大多数气体——即 H ₂ O、O ₃、HNO ₃、CH ₄、N ₂ O、NO ₂、N ₂ O ₅、ClONO ₂、CFC-11、CFC-12、HCFC-22、CCl ₄、CF ₄、COF ₂和 HCN——我们发现两种 MIPAS 仪器在低平流层中检索到的垂直剖面的一致性为 5%–20%。对于 C ₂ H ₂、C ₂ H ₆、COCl ₂、OCS 和 CH _3物种然而，Cl 在这个高度范围内出现了更大的差异（在 20 %–50 % 之内）。