SITE CONDITIONS
Seeing Conditions
FWHM of only 1.0 - 1.2 arcsecond
Average seeing is 1.0 arcsecond in the summer and 1.2 arcseconds in the winter.
FWHM of only 1.0 - 1.2 arcsecond
Average seeing is 1.0 arcsecond in the summer and 1.2 arcseconds in the winter.
Location
N 37.07 W 119.4 degrees
Located the western edge of California's Sierra Nevada Mountains, about 50 miles south of Yosemite National Park.
N 37.07 W 119.4 degrees
Located the western edge of California's Sierra Nevada Mountains, about 50 miles south of Yosemite National Park.
Elevation
4,610 feet
Sierra Remote is located in a "sweet spot" of seeing: high enough to be above the central valley Inversion Layer, but not so high as to prevent easy year-round accessibility to the site.
4,610 feet
Sierra Remote is located in a "sweet spot" of seeing: high enough to be above the central valley Inversion Layer, but not so high as to prevent easy year-round accessibility to the site.
Airflow Over the Site
Generally out of the west and laminar above 300ft.
The site is on top of Bald Mountain that rises several thousand feet above its surrounding terrain in all directions. The prevailing Westerly wind moves smoothly over the site. There are no mountains West of the site that would cause atmospheric turbulence. This allows the airflow to be laminar over the site, resulting in excellent seeing conditions at our 4,610 foot altitude.
Generally out of the west and laminar above 300ft.
The site is on top of Bald Mountain that rises several thousand feet above its surrounding terrain in all directions. The prevailing Westerly wind moves smoothly over the site. There are no mountains West of the site that would cause atmospheric turbulence. This allows the airflow to be laminar over the site, resulting in excellent seeing conditions at our 4,610 foot altitude.
Clear Nights
Approximately 237 clear nights annually.
California's Central Valley has one of the highest "ratings" for clear days of anywhere in the Western United States.
Approximately 237 clear nights annually.
California's Central Valley has one of the highest "ratings" for clear days of anywhere in the Western United States.
Dark Skies
Measured at 22 magnitudes / sq arcsecond, V band
Due to its location in the Sierra National Forest, SRO has very low risk of future development or encroachment that would affect levels of light pollution.
Measured at 22 magnitudes / sq arcsecond, V band
Due to its location in the Sierra National Forest, SRO has very low risk of future development or encroachment that would affect levels of light pollution.