1. if the noon sun is overhead at 12 degrees south latitude at what elevation (a

Question

1. if the noon sun is overhead at 12 degrees south latitude at what elevation (altitude or angle) will the noon sun be observed at Alta, Norway 60 degree north latitude
2. At which latitude (indicate the latitude and wheater it is North or South) would the noon sun be observed directly overhead on September 20?
Must show working 1. if the noon sun is overhead at 12 degrees south latitude at what elevation (altitude or angle) will the noon sun be observed at Alta, Norway 60 degree north latitude
2. At which latitude (indicate the latitude and wheater it is North or South) would the noon sun be observed directly overhead on September 20?
Must show working
2. At which latitude (indicate the latitude and wheater it is North or South) would the noon sun be observed directly overhead on September 20?
Must show working

Explanation / Answer

(1) The altitude angle (sometimes referred to as the "solar elevation angle") describes how high the sun appears in the sky. The angle is measured between an imaginary line between the observer and the sun and the horizontal plane the observer is standing on. The altitude angle is negative when the sun drops below the horizon. (In this graphic, replace "N" with "S" for observers in the Southern Hemisphere.)

altitude angle is calculated as follows:

sin (Al) = [cos (L) * cos (D) * cos (H)] + [sin (L) * sin (D)]

where:

Al = Solar altitude angle

L = Latitude

D = Declination

H = Hour angle

Here     Hour angle is is defined as 360° minus the right ascension.=360-600=3000

The declination angle can be calculated by the equation

=sin1(sin(23.45°)sin(360365(d81)))

submit all values we get declination angle is -0.2330

Altitude angle =sin (Al) = [cos (L) * cos (D) * cos (H)] + [sin (L) * sin (D)]

                           Altitude angle = [cos (12) * cos (-0.233) * cos (300)] + [sin (12) * sin (-0.233]=980

(2) Zero degrees latitude. The Sun is directly overhead the equator at noon on the two equinoxes on Sept 20 . The equator divides the globe into the Northern and Southern hemispheres. The equator appears halfway between the North and South poles, at the widest circumference of the globe. It is 24,901.55 miles (40,075.16 km) long.

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