Article

Contribution of the surface layer to the seeing at San Pedro Mártir: Simultaneous microthermal and DIMM measurements

Revista Mexicana de Astronomia y Astrofisica. Conference Series, v.19, 23-30 (2003) DOI:198595
Source: OAI

ABSTRACT Results from experiments measuring the contribution of the surface layer to the optical seeing at the Observatorio Astronómico Nacional at San Pedro Mártir (OAN-SPM) are reported. Microthermal sensors placed at 7 levels on a 15-m-high instrumented mast were used to measure the structure constant of the refractive index C[n]2. The integrated seeing parameter was measured with a Differential Image Motion Monitor during 23 nights. Log-normal statistics were found for the seeing with mean of 0.98 arcsec and median value 0.84 arcsec . The contribution of the surface layer (2.3 to 15 m) to the total optical turbulence has a mean value of 16

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Keywords

15-m-high instrumented mast
 
23 nights
 
7 levels
 
Differential Image Motion Monitor
 
median value 0.84 arcsec
 
Microthermal sensors
 
Observatorio Astronómico Nacional
 
refractive index C[n]2
 
San Pedro Mártir
 
structure constant
 
surface layer