7 papers · 1 filter
On-sky capabilities and performance of the Keck All Sky Precision Adaptive Optics system
Avinash Surendran, Maxwell Service, Jacques R. Delorme +21
The Keck All Sky Precision Adaptive optics (KAPA) project upgrades the Keck I adaptive optics system to enable laser tomography using a four laser guide star (LGS) asterism. KAPA i…
Ground control to major time-lag: on-sky results of data-driven predictive wavefront control at Keck Observatory
Jules Fowler, Rebeca Jensen-Clem, Sylvain Cetre +12
Directly imaging and characterizing exoplanets requires extreme adaptive optics (XAO), which achieves exquisite wavefront correction over a small (<5") field of view. Temporal erro…
Slow focus sensor for the Keck I laser guide star adaptive optics system using focal plane wavefront sensing
Rafael M. Salgueiro, Carlos M. Correia, Benoit Neichel +7
Laser guide stars (LGSs) have been deployed for the last 20-30 years in ground-based astronomical telescopes to overcome the limited sky coverage of classical adaptive optics (AO)…
Increasing science yield with a twilight observing program with the SCALES instrument at Keck
Isabel J. Kain, Carlos Alvarez, John M. O'Meara +13
While astronomical twilight closes the observing window for optical astronomers, the infrared sky remains dark even through sunrise, allowing IR astronomers to observe through twil…
A generalized approach to compensate for low and high frequency errors in FFT based phase screen simulations
Sorabh Chhabra, Jyotirmay Paul, Anamparambu N. Ramaprakash +1
Fast Fourier Transform based phase screen simulations give accurate results only when the screen size () is much larger than the outer scale parameter (). Otherwise, they f…
Scalable Platform for Adaptive optics Real-time Control (SPARC) Part 2: Field Programmable Gate Array (FPGA) implementation and performance
Avinash Surendran, Mahesh P. Burse, A. N. Ramaprakash +1
The next generation of Adaptive Optics (AO) systems on large telescopes will require immense computation performance and memory bandwidth, both of which are challenging with the te…