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Cited by 7 publications
(7 citation statements)
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“…This second measurement allows to measure the best Non common path aberrations (NCPA)-limited PSFs over all directions. See [27] about phase diversity/focal plane sharpening methods deployed on HeNOS to calibrate NCPA. Our purpose is to demonstrate the anisoplanatism model we developed allows for a good representation of PSF characteristics within the expected accuracy given by the sensitivity analysis.…”
Section: Towards Elts : Sensitivity Analysis Validated Using Henosmentioning
confidence: 99%
“…This second measurement allows to measure the best Non common path aberrations (NCPA)-limited PSFs over all directions. See [27] about phase diversity/focal plane sharpening methods deployed on HeNOS to calibrate NCPA. Our purpose is to demonstrate the anisoplanatism model we developed allows for a good representation of PSF characteristics within the expected accuracy given by the sensitivity analysis.…”
Section: Towards Elts : Sensitivity Analysis Validated Using Henosmentioning
confidence: 99%
“…where • OTF Stat includes the pupil model and the residual static aberrations, such as Non common path aberrations (NCPA), telescope-dependent static-aberrations and segmented mirror cophasing errors. We assume in this paper that the model is fed by the calibration of those static terms using dedicated phase diversity ( [20]) or focal sharpening ( [16]) methods. For Keck observations, the calibration procedure is detailed in ( [25,33,29]).…”
Section: Psf Direct Modelmentioning
confidence: 99%
“…Discrepancies at a level of 10% up to 20% on the C 2 n (h) estimation compared to AO control loop data-based technique on multiple NGS/LGS systems has been already observed ( [21]), which has an impact of the off-axis PSF model accuracy. On top of that, the PSF is affected by field-dependent static aberrations that must be characterized by using long-exposure phase diversity ( [20]) or focal-plane sharpening ( [16]) for instance, which potentially requires a large amount of telescope time ( [29]). Finally, earlier studies have showed discrepancies between the reconstructed PSFs and the on-sky PSFs ( [25,15]), that are attributed to the presence of instrumental effects, addressed at the system level ( [24,23]) and telemetry issues.…”
Section: Introductionmentioning
confidence: 99%
“…Therefore accumulating redundant measurements is fundamental to reduce as much as possible the influence of static aberrations. It would also be helpful to refine the PSF model by calibrating the field static aberrations using a phase retrieval technique (Lamb et al 2016;Mugnier et al 2008 Figure 13. Illustration of the possible baselines by choosing each star in turn as the reference.…”
Section: Layer Completenessmentioning
confidence: 99%