DES - Dark Energy Survey

Program Description: DES is designed to probe the origin of the accelerating universe and help uncover the nature of dark energy by measuring the 14-billion-year history of cosmic expansion with high precision. This collaboration is building an extremely sensitive 570-Megapixel digital camera, DECam, and will mount it on the Blanco 4-meter telescope at Cerro Tololo Inter-American Observatory high in the Chilean Andes. Starting in Sept. 2012 and continuing for five years, DES will survey a large swath of the southern sky out to vast distances in order to provide new clues to this most fundamental of questions

Year Started: 2012.

Organization Description: More than 120 scientists from 23 institutions in the United States, Spain, the United Kingdom, Brazil, and Germany are working on the project. The DES-Brazil is a member of the international cooperation Dark Energy Survey (DES) led by Fermilab, NCSA and NOAO.

Data Description: Each DECam image is a gigabyte in size. The Dark Energy Survey will take about 400 of these extremely large images per night. This presents a very high data-collection rate for an astronomy experiment. The data are sent via a microwave link to La Serena. From there, an optical link forwards them to the National Center for Supercomputer Applications (NCSA) in Illinois for storage and "reduction". The project to date requires small file transfer and occasional large file transfers at speeds between 100Mpbs to 1 Gbps. Reduction consists of standard image corrections of the raw CCD information to remove instrumental signatures and artifacts and the joining of these images into 0.5 square degree "combined images". Then galaxies and stars in the images are identified, catalogued, and finally their properties measured and stored in a database.

Project Type: Instrument

Project Domains: Math and Physical Sciences

No budget information

Program Data

Location Lat/Lon Coordinates Location Type Data Type Data Generation Single Data Instance Size (TB) Estimated Daily Data Size (GB) Estimated Annual Data Size (PB) Average Sustained Throughput (Gbps) Maximum Sustained Throughput (Gbps) Online Repository Size (PB) Total Repository Size (PB) Delay Tolerance (minutes) Jitter Sensitive? Uses the Cloud?
La Serena, Chile -29.91,-71.25 Instrument Image Not Specified 0.00 400.00 0.14 - -
NCSA, United States 40.11,-88.22 Data Repository and Analysis Image Not Specified 0.00 400.00 0.14 0.69999999 0.69999999 - -