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|Input Beam Profile|
Status: Soeren Meibom in preliminary phase of acquiring high-resolution solar spectrum. Here are some data files for a high-resolution solar spectrum:
Status: Kyle Westfall has preliminary zeropoint for echelle H-alpha region based on one measurement; lamp color-terms are found to be negligible; needs to finalize numbers for atmospheric losses, spectral aperture extraction losses and focal plane losses; needs to perform measurment for remaining data for which focal plane losses will require modeling. Separate effort by Crawford to model vignetting to help understand throughput budget.
Status: Not started (Westfall?); some stellar data in hand; may be able to use solar spectrum from Meibom.
Status: Analysis completed in MgI and CaII regions by MAB; Ha echelle data just acquired. New tests drafted.
Status: Initial design only. Some relevant numbers are listed here.
Status: Plannng not yet started
The primary has a 17.1% central obstruction from the baffle for the tertiary. This comes from the ratio of diameters (squared) of the primary (DP = 3498.85 mm) and baffle (DB = 1446.2 mm). The baffle diameter is larger than the secondary diameter (DS = 1200 mm), and so the baffle is the effective limit for the central stop for an on-axis source.
For the f/6.3 beam at the WIYN, MOS, and folded-Cass ports, 17.1% of a uniform beam corresponds to f/15.2. Hence a beam which simulates the true beam for these ports should consist of a uniformly filled beam (a cone with uniform cross-sectional surface-brightness) for apex angles between 7.5 deg (f/15.2) and 17.6 deg (f/6.3).