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In 2019, the US funding agencies announced that international partners would obtain data rights by making in-kind contributions to LSST operations, rather than paying a subscription, and, during 2019 and 2020, the LSST:UK consortium developed a UK in-kind proposal in conjunction with STFC, the Rubin Observatory and the LSST Science Collaborations. With the adoption of the in-kind model for international contributions, the remainder of the LUSC programme becomes, essentially, the delivery of the UK in-kind package, which offers the UK community a much better data rights deal than was provided by the original subscription model. The UK in-kind proposal includes included an endorsement from STFC, noting that it outlines the programme for which they intend to seek funding, and we have subsequently shared with STFC a detailed financial plan for whole-lifetime (i.e. 2015-2035) LUSC programme. These funds will be awarded through a series of PPRP bids and, in particular, the Phase C proposal will seek funding for the UK in-kind package for the period 1/4/23-31/3/27.
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