CFHTLS operations at CFHT
Jean-Charles Cuillandre, Christian Veillet, Pierre Martin

The talk will present how the CFHT Legacy Survey (CFHTLS) is operated, at CFHT under the New Observing Process. CFHT's responsibility in the, CFHTLS joined effort with the CADC and Terapix to provide data to the, Canadian and French communities (and world later on) is to gather the, raw data with the MegaPrime-MegaCam instrument under Queued Service, Observations mode, to calibrate and remove the instrumental signature from, the data with the Elixir pipeline, to collect ancillary data and ship, them along the FITS Elixir data (what is dumbed as a whole as the CFHT data, products), through the CFHT Data Archiving and Distribution Service to the, Canadian Archiving Data Center. After describing the scope of each of these, three components and how they have evolved under the impulse of the CFHTLS,, the talk will focus on the reasons why over the past three semesters since , the survey started, the CFHTLS data have not been gathered as fast as initially, expected. The main culprit appears to be the Mauna Kea weather, but the , operational and intrumental instrument overheads also play a role.