Speckle simulation tool for automated modelling of a large range of telescope aperture to fried parameter ratios

Sorabh Chhabra; Abhay A. Kohok; Bhushan S. Joshi; A. N. Ramaprakash; Chaitanya V. Rajarshi; Rani S. Bhandare

doi:10.1117/12.2628032

29 August 2022 Speckle simulation tool for automated modelling of a large range of telescope aperture to fried parameter ratios

Sorabh Chhabra, Abhay A. Kohok, Bhushan S. Joshi, A. N. Ramaprakash, Chaitanya V. Rajarshi, Rani S. Bhandare

Author Affiliations +

Proceedings Volume 12185, Adaptive Optics Systems VIII; 1218566 (2022) https://doi.org/10.1117/12.2628032
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

The Speckle Imager via MUlti Layer Atmospheric Turbulence Object Reconstructor (SIMULATOR) is a lab-based testbed instrument developed to test for speckle correlation-based techniques in the optical regime. However, this instrument can be used as a testbed against post-processing techniques or algorithms like lucky imaging, phase diversity method etc. The SIMULATOR can emulate 3D atmospheric turbulence behaviour using a three-layer turbulence screen, giving the user command over important site characteristics like wind profile, global fried parameter, global isoplanatic patch, mid-layer and high-layer height effects etc. This testbed is unique in that it can mimic a broad range of site and telescope characteristics accurately without the need for manual intervention or tuning of parameters. The current version can handle a Field of View (FoV) of up to 0.3°, bandwidth ranges from 4860 to 6560 nm and can cover atmospheric turbulence heights up to 83 km.

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Sorabh Chhabra, Abhay A. Kohok, Bhushan S. Joshi, A. N. Ramaprakash, Chaitanya V. Rajarshi, and Rani S. Bhandare "Speckle simulation tool for automated modelling of a large range of telescope aperture to fried parameter ratios", Proc. SPIE 12185, Adaptive Optics Systems VIII, 1218566 (29 August 2022); https://doi.org/10.1117/12.2628032

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