LSST Basic Configuration

For more information, look at the overview paper: LSST: from Science Drivers to Reference Design and Anticipated Data Products :

System

  • Representative Key Science Missions:
    1. Dark energy
    2. Solar system survey
    3. Optical transients
    4. Galactic map
  • Sky coverage: 18,000 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: 330nm to 1070nm
  • Number of active filters: five

Telescope and Site

  • Exposure Time Calculator
  • Optical Configuration: 3-mirror modified Paul-Baker
  • Final f-ratio: f/1.234
  • Mount configuration: Alt - Azimuth
  • Primary mirror aperture: 8.4 m
  • 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
  • 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: 950nm to 1070nm

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