kept on fast storage and with catalogs loaded into the database. Statistics collected by prior surveys (eg., SDSS) show that users nearly always prefer accessing the most recent data release, but sometimes may use the penultimate one (this is especially true just after the publication of a new data release). Older releases are used rarely, to assist with data quality monitoring and assessment small, overlapping, samples of data from older releases will be kept loaded in the database. The sample size is expected to be on order of 1 - 5% of the data release data, with larger samples kept early on in the survey. The goal is to allow one to test how the reported characterization of the same data varies from release to release. Releases will be archived to mass storage (tape). The users will not be able to perform database queries against archived releases. They will be made available as bulk downloads in some common format (for example, FITS binary tables). Database software and data loading scripts will be provided for users who wish to set up a running copy of an older (or current) data release database on their systems.raw data used to generate any public data product (raw exposures, calibration frames, telemetry, configuration metadata, etc.) will be kept and made available for download. Engineering and Facility Database A database containing telemetry and other meta-data about the LSST System and the images taken with the Camera. It also contains a record of all commands. This database is created and managed by the Observatory Control System (OCS). The DMS archives and accesses the EFD for processing and query purposes, and populates the EFD (via OCS) with data quality information and DMS status. Level 3 Data Data products generated by users on any computing resources anywhere that are brought to an LSST Data Access Center (DAC), stored there, and federated with Level 1 and Level 2 data. Science Data Archive The main repository of DMS data products. Contains repositories of Transient Alerts, Images, and Catalogs, each of which is further described in a package of that name. Also note the the contents of the Science Data Archive are organized into Data Releases. AstroObjects This package contains classes associated with astronomical object data products.
kept on fast storage and with catalogs loaded into the database. Statistics collected by prior surveys (eg., SDSS) show that users nearly always prefer accessing the most recent data release, but sometimes may use the penultimate one (this is especially true just after the publication of a new data release). Older releases are used rarely, to assist with data quality monitoring and assessment small, overlapping, samples of data from older releases will be kept loaded in the database. The sample size is expected to be on order of 1 - 5% of the data release data, with larger samples kept early on in the survey. The goal is to allow one to test how the reported characterization of the same data varies from release to release. Releases will be archived to mass storage (tape). The users will not be able to perform database queries against archived releases. They will be made available as bulk downloads in some common format (for example, FITS binary tables). Database software and data loading scripts will be provided for users who wish to set up a running copy of an older (or current) data release database on their systems.raw data used to generate any public data product (raw exposures, calibration frames, telemetry, configuration metadata, etc.) will be kept and made available for download. Engineering and Facility Database A database containing telemetry and other meta-data about the LSST System and the images taken with the Camera. It also contains a record of all commands. This database is created and managed by the Observatory Control System (OCS). The DMS archives and accesses the EFD for processing and query purposes, and populates the EFD (via OCS) with data quality information and DMS status. Level 3 Data Data products generated by users on any computing resources anywhere that are brought to an LSST Data Access Center (DAC), stored there, and federated with Level 1 and Level 2 data. Science Data Archive The main repository of DMS data products. Contains repositories of Transient Alerts, Images, and Catalogs, each of which is further described in a package of that name. Also note the the contents of the Science Data Archive are organized into Data Releases. AstroObjects This package contains classes associated with astronomical object data products.