Abstract
The properties of the phase-gradient algorithm for retrieving the Fourier phase from stellar speckle images are examined with respect to random image motion, centroiding, photon noise, and stray photons. The phase gradient is found to be immune to the degradation from image motion and distortions at low photon levels that occur in the Knox–Thompson process. The signal-to-noise ratios of the two methods are found to be comparable. Bias terms that are due to stray photons caused by background light or detector noise are derived.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
