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• W4380551323 abstract "The Dark Energy Spectroscopic Instrument (DESI) survey is a spectroscopic survey of tens of millions of galaxies at $0 < z < 3.5$ covering 14,000 square degrees of the sky. In its first 1.1 years of survey operations, it has observed more than 14 million galaxies and 4 million stars. We describe the processes that govern DESI's observations of the 15,000 fields composing the survey. This includes the planning of each night's observations in the afternoon; automatic selection of fields to observe during the night; real-time assessment of field completeness on the basis of observing conditions during each exposure; reduction, redshifting, and quality assurance of each field of targets in the morning following observation; and updates to the list of future targets to observe on the basis of these results. We also compare the performance of the survey with historical expectations, and find good agreement. Simulations of the weather and of DESI observations using the real field-selection algorithm show good agreement with the actual observations. After accounting for major unplanned shutdowns, the dark time survey is progressing about 7% faster than forecast." @default.
• W4380551323 created "2023-06-14" @default.
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• W4380551323 date "2023-06-09" @default.
• W4380551323 modified "2023-10-18" @default.
• W4380551323 title "Survey Operations for the Dark Energy Spectroscopic Instrument" @default.
• W4380551323 doi "https://doi.org/10.48550/arxiv.2306.06309" @default.
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