wiki:InfrastructureCheatSheet
Last modified 6 years ago Last modified on 02/19/2013 04:00:37 PM
10 Year Totals for Main Survey
Number of Visits 2.8 million
Number of Exposures 5.6 million
Number of Visits per Field 857; (ugrizy) = (60, 83, 187, 187, 170, 170) LSE-61
Number of Objects 13 -> 37 billion (DR1 -> DR11)
Number of Stars 6 -> 14 billion (DR1 -> DR11)
Number of Galaxies 7 -> 23 billion (DR1 -> DR11)
Number of SNe Type Ia 1 million
Each Year
Usable Nights 292 (80% of 365)
Each Night
Raw Image Data, Bytes (uncompressed) 12.05 TB min (10 hours); 15.22 TB max(14 hours)
Raw Image Data, Bytes (compressed at 42% c:o) 5.1 TB min; 6.4 TB max
Number of Visits 950 min; 1200 max
Number of Exposures 1900 min; 2400 max
Number of Alerts Generated 2 million
Each Visit
Bytes (uncompressed) 12684 MB
Bytes (compressed at 42% c:o) 5376 MB
Elapsed Time ~39 seconds average (two exposures, ~5s to move, filter changes)
Sources 1.97 million
Alerts 2100
Each Exposure
Pixels 3171 million
Bytes (uncompressed) 6342 MB
Bytes (compressed at 42% c:o) 2688 MB
Elapsed Time 17 seconds (15 + 2 for readout)
Each Alert
Number of cutouts 2 (from Calibrated Image and Difference Image)
Cutout (pixels) 900 (30x30)
Size (cutouts only) 18KB (uncompressed); 10 bytes per pixel: data(4), variance(4), mask(2)
Camera Specifications
Primary Mirror 8.4 m
Number of Rafts 21
Sensors per Raft 9
Total Science Sensors 189
Channels per Sensor 16
Pixels per Channel 1.049 million
Pixels per Sensor 16.777 million (4096 x 4096)
Focal Plane Diameter (pixels) 61,440 pixels @ horizontal and vertical
Field of View (area) 9.6 deg^2
Field of View (diameter) 3.5 deg
Moon's Field of View (diameter) 0.5 deg
Field of View (total pixels) 3372 million pixels (201 total sensors)
Field of View (science pixels) 3171 million pixels (189 science sensors)
Number of HDTVs (1920x1080) 1530
Survey Data
Usable Nights at Cerro Pachon 80%
Telescope Time for Main Survey 90%
Telescope Time for Special Programs (e.g. Very Deep) 10%
Total Survery Area 28,000 deg^2 (< 34.5 deg)
Main Survey Area 18,000 deg^2