Air mass: Difference between revisions
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:* Show the air mass for zenith angles '''0''' to '''90''' in steps of '''5''' degrees for an observer at sea level. |
:* Show the air mass for zenith angles '''0''' to '''90''' in steps of '''5''' degrees for an observer at sea level. |
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:* Do the same for the SOFIA infrared telescope, which has a cruising altitude of 13,700 meters (about 8.3 miles), |
:* Do the same for the SOFIA infrared telescope, which has a cruising altitude of 13,700 meters (about 8.3 miles), |
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:: flying in a specially retrofitted Boeing 747 about four flights a week |
:: flying in a specially retrofitted Boeing 747 about four flights a week. |
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