Wavefront coherence time seasonal variability and forecasting at the San Pedro Mártir site

Details Wavefront coherence time seasonal variability and forecasting at the San Pedro Mártir site Wavefront coherence time seasonal variability and forecasting at the San Pedro Mártir site

Feb 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...366..708m&link_type=abstract

Astronomy and Astrophysics, v.366, p.708-716 (2001)

Astronomy and Astrophysics

Astrophysics

17

Scientific paper

In order to efficiently use the recent astronomy high angular resolution techniques (Adaptive Optics and Interferometry) to correct the perturbed wavefront arriving at the telescope pupil, it is necessary to characterize a set of astroclimatic parameters. One of these is the wavefront coherence time tau_AO . It is an integral parameter, defining the maximum temporal correlation of the perturbed wavefront and it depends on the optical turbulence C_N2 (x, y, z) and the wind intensity mid V(x, y, z)mid in the whole troposphere. In this paper we use an atmospheric non-hydrostatic model (Meso-NH) conceived to simulate the classical meteorological parameters (p, T and V) and adapted to simulate the optical turbulence (C_N2 ) to characterize the tau_AO in a region of some kilometers around the astronomical site of San Pedro Mártir (SPM) in Baja California (Mexico). We study the seasonal variability of the wind intensity in the whole atmosphere (20 km) above the SPM site during one year. We show that, using the C_N2 profiles simulated by Meso-Nh initialized with ECMWF (European Center for Medium Weather Forecasts) data, we obtain typical tau_AO values in the V band (lambda = 0.5 mu m). We calculate the seasonal variability of the tau_AO in SPM and also some preliminary results about the seasonal variability of C_N2 . Moreover, we suggest a physical explication of these variabilities. Finally we investigate the possibility of forecasting tau_AO .

Affiliated with

Also associated with

No associations

Rating

Wavefront coherence time seasonal variability and forecasting at the San Pedro Mártir site 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 Wavefront coherence time seasonal variability and forecasting at the San Pedro Mártir site, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wavefront coherence time seasonal variability and forecasting at the San Pedro Mártir site will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1711194