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The VDFS comprises the system to pipeline process and archive the data frominfrared observations taken by both the WFCAM instrument on UKIRT and theforthcoming VISTA telescope. These include the largest near-IR surveys to date,such as UKIDSS, which produce terabyte sized catalogues of over 10^9 rows. Suchlarge data volumes present a performance challenge when the catalogue data,stored in a relational database, require many iterations of astrometric andphotometric recalibration. Here we present the VDFS recalibration solution thatwill be employed in the WSA from the forthcoming UKIDSS Data Release 4 and VSAfrom its inception.

Recalibration of Data in the VDFS Science Archives