Na variability and LGS elongation: impact on wavefront error

Details Na variability and LGS elongation: impact on wavefront error Na variability and LGS elongation: impact on wavefront error

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011spie.8149e..13j&link_type=abstract

Astronomical Adaptive Optics Systems and Applications IV. Edited by Tyson, Robert K.; Hart, Michael. Proceedings of the SPIE,

Physics

Optics

Scientific paper

Variation in density structure and altitude of mesospheric sodium impacts the performance of Adaptive Optics (AO). With large entrance apertures, Laser Guide Stars (LGS) are seen as cylinders with an intensity structure that reflects the density structure of the sodium layers. Such elongation spreads the sodium light over more WaveFront Sensor (WFS) pixels and reduces the signal to noise ratios. This effect is proportional to the square of the telescope diameter: 30 m for TMT and 42 m for E-ELT. NA variability is examined and the resulting elongation analyzed for impact on WaveFront Error. TMT and E-ELT will be compared for methods being applied to mitigate LGS elongation to reduce resulting WaveFront Error.

Affiliated with

Also associated with

No associations

Rating

Na variability and LGS elongation: impact on wavefront error does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Na variability and LGS elongation: impact on wavefront error, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Na variability and LGS elongation: impact on wavefront error will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1461584