Fourier
IDL file in OAA library: oaa_lib/ao_lib/mcao_fourier.pro
- Approximate estimation of HO tomo., gen. fitting, temporal error, noise error
- Approximations: infinite pupil, point-like source, cone effect not accurately modeled
- Can be used to produce PSFs (short or long exposure)
References:
Dedicated generalized fitting
IDL file in OAA library: oaa_lib/ao_lib/gen_fitting.pro
- same as in Fourier code but much faster, useful if we want to compute this error only (approx.: perfect tomography)
References:
Zernike covariance
IDL file in OAA library: oaa_lib/ao_lib/zern_cov_aniso.pro
- Computes the covariance of turbulent Zernike modes from 2 different beams
- Can also compute the temporal PSD corresponding to this covariance (to be corrected soon, the formula in the code is right, but corresponds to a particular case)
References:
IIR filter optimization
IDL file in OAA library: oaa_lib/tfl_lib/modal_control_optimization.pro
- optimizes the temporal filter to apply to an input temporal PSD (given the order of the filter and gains to explore).
References:
Pixel mean and variance
IDL file in OAA library: oaa_lib/ao_lib/meanvar_pixel_thr.pro
- computes the mean and variance of a pixel value given the mean flux received, the RON, the background, the dark current, the excess noise factor and a threshold applied on pixels.
WCoG variance and bias
IDL file in OAA library: oaa_lib/ao_lib/calc_noise_wcog.pro
- computes the variance and bias of a slope computed with a WCoG, given a weighting map, a PSF (default: Gaussian spot) and the noise conditions. It uses the code meanvar_pixel_thr.pro.
Sky coverage
- Creation of a catalog of fields and valid asterisms from a star list (given by TRILEGAL for example), taking into account the geometry of the technical FoV and the pick-off mirrors.
- Estimation of LO residuals in any direction of the field for a given NGS asterism, computing the tomographic error (from Zernike covariance code), the noise error (interpolation from E2E) and the windshake error (from PSD and transfer function).
- Computation of tip/tilt kernel maps, distorsions due to WFSs’ pointing error.
References:
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CedricPlantet - 04 Dec 2019