Determination process and results of solar height at noon in Lhasa

The midday sun height angle is related to the latitude of Lhasa and the position of the direct point of the sun. The height of the sun at noon in Lhasa is different on different days.

The latitude of Lhasa is 29.6 north latitude (generally 30, easy to settle accounts).

H= 90-30 latitude of the direct point of the sun.

H = 90°- latitude difference (latitude difference is the latitude difference between Lhasa and the direct point: if the direct point is located in the northern hemisphere, two latitude values are subtracted; If the direct point is located in the southern hemisphere, add two latitude values)

Extended data:

Because the direct point of the sun moves between the tropic of cancer, so:

1. In the area between the Tropic of Cancer, there are opportunities for direct sunlight twice a year, and the height of the sun is the highest at noon, which is 90. There is a minimum when the sun shines directly on the Tropic of Cancer. Among them, except for the two minima of the equator, the other areas are the smallest when the sun shines directly on the Tropic of Cancer.

2. In the area above the Tropic of Cancer, there is an opportunity of direct sunlight once a year, that is, the solstice in summer and the solstice in winter.

3. Outside the Tropic of Cancer, which may include the Tropic of Cancer, the sun is the largest when it is directly on the Tropic of Cancer in this hemisphere, and the smallest when it is directly on the Tropic of Cancer in another hemisphere.

Baidu encyclopedia-noon sun height