Processing and Product Management for GOME-2 Atmospheric Trace Gas Monitoring

Abstract

Within the distributed EUMETSAT Polar System (EPS) ground segment, the German Aerospace Center (DLR) will act as an integral part of the Satellite Application Facility for Ozone Monitoring (O3M-SAF) for the processing, archiving and delivery of GOME-2 atmospheric total column trace gas products. The GOME-2 level 1b input data are systematically disseminated by the EPS ground segment to the O3M-SAF. Upon data reception, the O3M-SAF immediately starts processing for the generation of near-real-time level 2 products, especially total column ozone concentration maps. Subscribed users such as SAF network partners or weather services get the data delivered within 45 minutes after arrival at the O3M-SAF. Users can order offline atmospheric trace gas products either via the EUMETSAT UMARF catalogue or via the DLR web gateway (EOWEB). The challenging requirements of the EPS ground segment for the SAFs concerning processing throughput, system reliability, guaranteed near-real-time capability, data consistency and activity traceability are met at DLR with an integrated O3M-SAF processing and product management system with scalable components for processing, archiving and delivery. This paper presents the processing and product management system of the O3M-SAF at DLR. The system consists of a generic processing system management component configured to interface DLR s Universal Processor for Atmospheric Spectrometers (UPAS) and an interface component to the UMARF catalogue for the upload of products and the reception of orders. For central product and order management tasks the system uses a standard interface to access the components and functionality of the multi-mission Data Information and Management System (DIMS). DIMS is operational at DLR since 2001 in the ground segment of various earth observation missions. Next to an overview on the functionality and structure of the DLR O3M-SAF, we focus on the support of the various usage scenarios of the GOME-2 total column products and show how a flexible framework can be utilised to significantly increase the amount of reuse when dealing with future ground segment applications.