GSC Sentinel-2 PDGS OCD - Emits - ESA

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GSC Sentinel-2 PDGS OCD Issue 1 Revision 2 (draft) - 25.07.2010 GMES-GSEG-EOPG-TN-09-0008 page 282 of 350 6.11.3.3 Users Self-Registration, Account Activation, Login and Preferences This operation scenario stands for the user-driven activities that are prerequisite to the data discovery and product downloads including the following ones: ‣ User self-registration: based on the MMUS configuration with respect to the different profiles and user management configuration; ‣ Account activation: in case of previously created predefined user accounts (as shown in previous scenario), the user activates it according to the offered authentication mechanisms; ‣ User login: as the first step previous to the product discovery and download activities; ‣ User preferences management: according to the profile grants, the user manages different preferences; ‣ User subscription to the desired and authorised datasets (i.e. shopcart management). The user, by making use of the MMUS client-side (i.e. web browser), triggers the previously described activities. 6.11.3.4 Catalogue of Sentinel-2 Product-Data This operation scenario stands for the autonomous catalogue of the Sentinel-2 Product Data. The MMUS function processes the archive centres updates in order to catalogue the new production available, and as such, supporting the subsequent product discovery activities. The following steps are identified for this operation scenario: 1) The MMUS function ingests the new Sentinel-2 archived production metadata and browse images (by the ngEO-Feed component) as provided by the DAX function; 2) The new metadata is consolidated with the already metadata catalogued; 3) The new browse images are archived; 4) The catalogue content is consolidated; 5) The contents of the Sentinel-2 datasets (product collections) are updated according to the new catalogued metadata. This scenario is a pre-requisite to the product discovery and downloads activities triggered by the user. The MMUS function consolidates the metadata information used to populate the catalogue and as such, it encapsulates the Sentinel-2 product physical breakdown details (granules and tiles) and the product components distributed location on the different archive centres, offering to the different users homogeneous Sentinel-2 “end products”. 6.11.3.5 Product Discovery This operation scenario stands for the user-driven activities for the Sentinel-2 products discovery. The user, through the MMUS function client-side (i.e. web browser), looks for the authorised available Sentinel-2 production. Accordingly, the MMUS function offers amongst others the following product discovery capabilities: ESA UNCLASSIFIED – For Official Use © ESA The copyright of this document is the property of ESA. It is supplied in confidence and shall not be reproduced, copied or communicated to any third party without written permission from ESA.
GSC Sentinel-2 PDGS OCD Issue 1 Revision 2 (draft) - 25.07.2010 GMES-GSEG-EOPG-TN-09-0008 page 283 of 350 ‣ Navigation through the authorised datasets; ‣ Search of products according to the user-driven filtering requests; ‣ Specific Sentinel-2 filtering capabilities based on the products cloud-coverage; ‣ Product pre-visualisation capabilities based on the archived browse images; ‣ Geo-reference of the browse image and display through Web Map Servers; ‣ Visual inspection of the associated product metadata; ‣ Product selection and ordering based on the previous product discovery activities. This operation scenario allows the user to discover the available production according to the authorised access leverage. Subsequently, the user will be able to request the desired production for download at the user-base. 6.11.3.6 Product Download This operation scenario stands for the user-driven activities for product download at the userbase. Once the user has identified the desired production (cf. previous scenario), it requests it for product download. The MMUS function relies on the DAG function for the product-component (granules/tiles) download activities from the archive centres and subsequent end-product reconstruction activities (cf. section 6.10.3.1). The following steps are identified for this operation scenario: 1) The user via MMUS client-side (i.e. web browser) request for download the desired production as identified by the product discovery activities; 2) The MMUS function verifies the user access-leverage and authorises the request; 3) The MMUS function conforms a request according to the defined interface and passes it to the DAG function client side (i.e. a plug-in to the web browser) that performs the products components download; 4) The DAG function client side, once all the product components have been downloaded at the user base, reconstructs the user-product as requested. In this manner, the (registered) users can download the authorised Sentinel-2 products. 6.11.3.7 Subscriptions for Automatic Product Download This operation scenario stands for the automatic product download at the user-base. By usage of the MMUS function (ngEO Download Manager), the user is able to automatically receive the desired Sentinel-2 products. The following steps are identified for this operation scenario: 1) The user subscribes to the desired and authorised datasets (i.e. shopcart management); ESA UNCLASSIFIED – For Official Use © ESA The copyright of this document is the property of ESA. It is supplied in confidence and shall not be reproduced, copied or communicated to any third party without written permission from ESA.
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GSC Sentinel-2 PDGS OCD - Emits - ESA

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