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- Altitude histogram from a representative 10 year run (08/2013)
- Raw data provided by Srini (OpSim 3.61).
- Binned by Bo into 90 bins. Note that altitude angle = 90 degree - zenith angle.
- Summit temperature variations (08/2013)
- The night temperature on Cerro Pachon rarely gets above 16C or below 2C. (provided by Chuck, page 8 of AOS review document)
- We assume the temperature is Gaussian distributed and use (2C, 16C) as the (-2sigma, 2sigma) bounds.
we expect the M1M3 thermal control system to control the thermal gradients in the M1M3 mirror substrate to within 0.4C in x and y lateral directions, and 0.1C in radial and axial directions. (05/2009)
- Page 8 of Document-7574.
- We assume the thermal gradients to be Gaussian distributed, with (-2sigma, 2sigma) ranges covering (-T/2, T/2), where T is 0.4C or 0.1C (see above).
- Camera rotation angle is assumed to be a uniform distribution between 0 -90 and 90 degrees
Mirror Bending Modes:
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