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- Title
Ten years of MIPAS measurements with ESA Level 2 processor V6 - Part 1: Retrieval algorithm and diagnostics of the products.
- Authors
Raspollini, P.; Carli, B.; Carlotti, M.; Ceccherini, S.; Dehn, A.; Dinelli, B. M.; Dudhia, A.; Flaud, J.-M.; López-Puertas, M.; Niro, F.; Remedios, J. J.; Ridolfi, M.; Sembhi, H.; Sgheri, L.; von Clarmann, T.
- Abstract
The MIPAS (Michelson Interferometer for Passive Atmospheric Sounding) instrument on the Envisat (Environmental satellite) satellite has provided vertical profiles of the atmospheric composition on a global scale for almost ten years. The MIPAS mission is divided in two phases: the full resolution phase, from 2002 to 2004, and the optimized resolution phase, from 2005 to 2012, which is characterized by a finer vertical and horizontal sampling attained through a reduction of the spectral resolution. While the description and characterization of the products of the ESA processor for the full resolution phase has been already described in previous papers, in this paper we focus on the performances of the latest version of the ESA (European Space Agency) processor, named ML2PP V6 (MIPAS Level 2 Prototype Processor), which has been used for reprocessing the entire mission. The ESA processor had to perform the operational near real time analysis of the observations and its products needed to be available for data assimilation. Therefore, it has been designed for fast, continuous and automated analysis of observations made in quite different atmospheric conditions and for a minimum use of external constraints in order to avoid biases in the products. that minimum constraints are used and the best vertical resolution obtainable from the measurements is achieved in all atmospheric conditions. Random and systematic errors, as well as vertical and horizontal resolution are compared in the two phases of the mission for all products, namely: temperature, H2O, O3, HNO3, CH4, N2O, NO2, CFC-11, CFC-12, N2O5 and ClONO2. The use in the two phases of the mission of different optimized sets of spectral intervals ensures that, despite the different spectral resolutions, comparable performances are obtained in the whole MIPAS mission in terms of random and systematic errors, while the vertical resolution and the horizontal resolution are significantly better in the case of the optimized resolution measurements.
- Subjects
PLASMA diagnostics; MICHELSON interferometer; ATMOSPHERIC acoustics; ATMOSPHERIC composition; EUROPEAN Space Agency
- Publication
Atmospheric Measurement Techniques, 2013, Vol 6, Issue 9, p2419
- ISSN
1867-1381
- Publication type
Article
- DOI
10.5194/amt-6-2419-2013