LONG-TERM VALIDATION OF GOMOS, MIPAS AND SCIAMACHY OZONE AND TEMPERATURE PROFILES BY THE ENVISAT QUALITY ASSESSMENT WITH LIDAR (EQUAL) PROJECT

摘要

The latest analysis results of new processing algorithms and new data are presented in this paper and are part of the Envisat Quality Assessment with Lidar (EQUAL) project. New ozone profiles retrieved from measurement of MIPAS in RR-mode (IPF v5.00) were analyzed and they show good agreement with lidar data, especially some high vertical structures in the data are well represented. GOMOS ozone profiles (IPF v5.00), measured in the second half of 2006 and operationally processed by ESA, are in very good agreement with lidar data, which is in line with previous results [1]. Sciamachy ozone profiles (IPF v3.00), measured in the second half of 2006 and operationally processed by ESA, show a negative bias of 10-20% compared to lidar data, which is also in line with previous results [2]. We also show that limb measurements, processed with the current processor version of MIPAS and Sciamachy, still result in data with an altitude shift of about 1000 m with an opposite sign for each instrument owing their viewing direction.