LSST Basic Configuration
For more information, look at the overview paper at: LSST: from Science Drivers to Reference Design and Anticipated Data Products.
System
- Representative Key Science Missions:
- Dark energy
- Solar system survey
- Optical transients
- Galactic map
- First light schedule: Fall, 2015
- Sky coverage: 20,000 degrees2
- Standard cadence: 15+1 sec expose/shutter, 2 sec read, 15+1 sec expose/shutter, 2 sec read, 5 sec slew/read
- Etendue ( AΩ ): 319 meter2degrees2
- Field of View: 3.5 degrees (9.6 square degrees)
- Effective clear aperture: 6.68m (including obscuration)
- Wavelength coverage: 320nm to 1060nm
- Number of active filters: five
Telescope and Site
- Optical Configuration: 3-mirror modified Paul-Baker
- Final f-ratio: f/1.234
- Mount configuration: Alt - Azimuth
- Primary mirror aperture: 8.4 m
- Filter set (FWHM points - nm)
- u: 330nm to 403nm
- g: 403nm to 552nm
- r: 552nm to 691nm
- i: 691nm to 818nm
- z: 818nm to 922nm
- Y: 970nm to 1015nm
- Step-and-settle time: 5 seconds
- Site: Cerro Pachón, Chile
Camera
(includes focal plane, electronics, refractive corrector lenses, shutter, filters, filter mechanism, dewar, body)
- Pixel count: 3.2 Gpixels
- Readout time: 2 sec
- Dynamic range: 16 bits
- Nominal exposure time: 15 seconds
- Plate scale: 50.9 microns/arcsec
Data Management
- Real-time alert latency: 60 seconds
- Nightly data generation rate: 15 TBytes (16 bits)
- Yearly data generation rate (average): 6.8 PBytes
- Total disk storage: 200 Pbytes
- Nominal computer requirement: 60 Tflops
- Long-haul communications BW: 10 Gbits/sec