input data
DESCRIPTION
Data Management: Input Data Prepared by: Simon Krughoff ImSim Project: University of Washington LSST Preliminary Design Review August 29-September 2, 2011. Input Data. Summary Simulated Imagery Simulated operations Simulated time variable sky Atmosphere/Optics model CFHT Imagery - PowerPoint PPT PresentationTRANSCRIPT
1Preliminary Design Review • Tucson, Arizona • August 29th – September 2nd, 2011Preliminary Design Review • Tucson, Arizona • August 29th – September 2nd, 2011
Data Management: Input Data
Prepared by: Simon KrughoffImSim Project: University of Washington
LSST Preliminary Design ReviewAugust 29-September 2, 2011
2Preliminary Design Review • Tucson, Arizona • August 29th – September 2nd, 2011
Input Data
Summary – Simulated Imagery
– Simulated operations– Simulated time variable sky– Atmosphere/Optics model
– CFHT Imagery– Camera design
– Focal plane layout– Electronic properties
– Calibration Products
3Preliminary Design Review • Tucson, Arizona • August 29th – September 2nd, 2011
Input Data: Simulated Imagery
− Simulated Observations– 10 years – ~3 Million
observations– Historical weather and
downtime– Filter and location
chosen to satisfy science programs
– Realistic slew, exposure, and shutter times
4Preliminary Design Review • Tucson, Arizona • August 29th – September 2nd, 2011
Input Data: Simulated Imagery
− Simulated Sky– Galactic structure model from
Juric et al. (2008), Amores & Lepine (2005), Schlegel, Finkbeiner, & Davis (1998)
– Solar system model from Grav et al. (2010)
– Extragalactic positions from White with semi-analytic properties from De Lucia
– Variable AGN/QSOs, Cepheids, RRLy, eclipsing binaries, AM CVn, microlensing events, M-dwarf flare
5Preliminary Design Review • Tucson, Arizona • August 29th – September 2nd, 2011
Input Data: Simulated Imagery
− Atmosphere/Optics Model – 6 moving screen model
normalized to seeing from OpSim with historical wind velocity
– Kolmogorov spectrum cloud model informed by historical cloud coverage data
– Full optical system model
6Preliminary Design Review • Tucson, Arizona • August 29th – September 2nd, 2011
Input Data: Simulated Imagery
7Preliminary Design Review • Tucson, Arizona • August 29th – September 2nd, 2011
CFHT Data
− ~19,000 MegaCam images– 23 May 2003 to 16 Feb
2008− 36 two amp CCDs in
rectangular grid− 1deg x 1deg fov− u*,g,r,i,z filters (note the u*
is broader than the LSST u)− Bias Frames− Flat Frames− Fringe Frames for i and z
images.
8Preliminary Design Review • Tucson, Arizona • August 29th – September 2nd, 2011
Camera and Electronics Model
− Focal plane layout– 189 imaging chips:
2000x2072 pix– 4 wavefront sensors– 21 3x3 rafts
− Electronic design– 8x2 Amps per chip– 509x1000 pix per amp
9Preliminary Design Review • Tucson, Arizona • August 29th – September 2nd, 2011
Calibration Products
− 10 realizations with 2 exposures per realization
− Reduced using DM stack to produce master calibration frames.
− Bias frames– zero length exposures
− Dark frames– 180 sec exposures with
shutter closed− Per filter flats
– Analytic fit to vignetting function sampled to place photons.