Geographic solar altitude angle, the altitude angle of the sun everywhere

b Look at place B, the sunrise time is 16 o'clock in Beijing, the sunset time is 4 o'clock in Beijing, and the day length is 12 hours. So 6 at sunrise and 18 at sunset.

c On this day, the maximum angle of the sun's altitude is about 75°, so the distance from the latitude of the direct sun is about 15 degrees. A (30 north latitude) has a day length of 14 hours, so it can be inferred that the direct latitude is north latitude. And at 15 degrees latitude from the point of direct light, there are two possibilities:

1.45° north latitude (not established because it is impossible to shoot directly north of the Tropic of Cancer): 2

At 15°N, only c meets this criterion

Looking at place B again, the day length is 12, the solar altitude angle is 75, and it is 15 degrees away from the direct latitude of the sun like place A, so place B is the equator. The equatorial sunrise is always 6 o'clock, at this time the Beijing time is 16 o'clock, and the east eighth area is 16 o'clock, then the direct point should be in the east fourth area, and the direct longitude is 60 degrees east longitude.

b Based on the previous two questions, A is at 30° north latitude, B is at the equator, and A is north of B.

At 16 o'clock Beijing time, local time is 6 o'clock, a difference of 10 hours (10 hours later), so B is the second west area, and the longitude is 30 degrees west longitude.

The maximum height of the sun at noon is 12 o'clock Beijing time, and it can be seen that when it hits the meridian of Adi, it is exactly 12 o'clock Beijing time, so Adi is the eighth district of the east, and the east longitude is 120 degrees.

From this, it can be seen that A is east of B.

So A is northeast of B, and B is southwest of A.

What the hell are you trying to ask? Question breakdown?

Solar altitude angle = 90 degrees – latitudinal difference.

I don't see what you're trying to ask.

If it's a multiple-choice answer.

But the bottom has already been written: BCB Wang!

Solar elevation angles in different regions.

Different. Take the Beijing area as an example, the latitude of the Beijing area is 40°N, and its solar altitude angles are:

1. Vernal equinox day: the sun directly hits the equator at 0°, and the solar altitude angle at noon in Beijing on that day = 90°-|40°-0°|=50°

2. Summer solstice.

The direct sun shines at 23°26 n, the height of the sun at noon in Beijing on that day.

Angle = 90°-|40°--23°26′|=73°26′

3. Autumn equinox day: the sun directly hits the equator at 0°, and the solar altitude angle at noon in Beijing on that day = 90°-|40°-0°|=50°

4. Winter solstice: the sun shines directly at 23°26 s, and the solar altitude angle at noon in Beijing on that day = 90°-|40°-（23°26′）|26°34′

Calculation formula: noon sun height = 90°-|Local geographic latitude - the point where the sun shines directly at this time.

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The law of the change of the height of the sun is only the angle of separation:

1. Latitude change law: the latitude and longitude where the direct sun point is located.

Decreasing to the north and south. It can be inferred that the latitude difference from the direct point of the sun is one degree, and the altitude angle of the sun at noon decreases by one degree. (It can be further concluded that the altitude angle of the sun at a certain noon is known, and there are generally two parallels equal to this degree).

For example, if the sun shines directly at 20°N, the elevation angle of the Sun at noon in the world will gradually decrease from 20°N to the north and south, and the solar elevation angle at noon at 19°N is equal to 89°.

That is, the height of the sun at noon at 19°n = 90° - (direct point of the sun - latitude of the place) = 90° - (20° - 19°) = 89°

2. The law of seasonal changes: the sun refers to the direct point of the jujube gradually increasing when it moves, and gradually decreasing when it moves (the direct point of the sun is relative to the latitude of a certain place).

For example, for a region of 31°N, the solar elevation angle increases at noon from December 22 (winter solstice) to June 22 (summer solstice), and decreases at noon from June 22 (summer solstice) to December 22 (winter solstice).

As follows:

Sun altitude angle, a geographical term, refers to the sunlight at a certain point on the earth.

The angle between the direction of incidence and the ground plane. Technically, the solar elevation angle refers to the angle between the sun's rays in a certain place and the surface section connected to the center of the earth through that place.

When the solar altitude angle is 90°, the solar radiation intensity is the highest. The greater the degree to which the Sun obliquely hits the ground (i.e., the smaller the solar altitude angle), the less intense the solar radiation. The solar altitude angle can also be referred to simply as the solar height.

The solar altitude angle changes with time.

At sunrise, the Sun is at the ground level, and the solar altitude angle is 0°; Over time, the solar altitude angle gradually increases; The solar altitude angle reaches its maximum at noon, after which it gradually decreases. At sunset, the sun sets again on the ground level, and the solar altitude angle decreases to 0°.

Because the sun is directly shining on the Tropic of Cancer, the solar altitude on the Tropic of Cancer is 90 degrees, and the solar altitude of this unknown location is 45°, and the solar altitude decreases from the direct point of the sun to the north and south, so there are two cases, this unknown location may be in the northern hemisphere or in the southern hemisphere.

Because the sun shines directly at 23°26 n, there is a certain latitude of 45° in the north and south.

Bring in the formula: 45°=90°-|23°26′-x|, then x has two values, one at 63°26 and the other at 21°34.

Because the point of refraction is in the Northern Hemisphere, 21°34 is the latitude of the Northern Hemisphere and the other is the Southern Hemisphere.

The direct point of the sun and the point of refraction of the sun mean the same thing, but the point of refraction of the sun is more accurate!

When the Sun is on the Tropic of Capricorn, the Sun altitude at the North Pole is 23°26, while the South Pole is night, and the Sun at the Antarctic Circle is 0°

From the Tropic of Cancer to the north, the solar altitude angle decreases from 90° to 23°26.

From the Tropic of Cancer to the south, the solar altitude decreases from 90° to 0°.

In both ranges, there is an altitude angle of 45° of the Sun, so there are two cases, one in the Northern Hemisphere and one in the Southern Hemisphere.

The geographical term of solar altitude angle refers to the angle between the direction of incidence of sunlight and the ground plane at a certain point on the earth.

The solar altitude angle is abbreviated as"Sun altitude"(Actually, it's an angle). The height of the sun is the most important factor that determines the amount of solar heat energy received by the Earth's surface. We use h to represent this angle, which is numerically equal to the horizon height of the Sun in the Earth's horizon coordinate system.

The geographical term of solar altitude angle refers to the angle between the direction of incidence of sunlight and the ground plane at a certain point on the earth.

Professionally speaking, the solar elevation angle refers to the angle between the sun's rays in a certain place and the surface section of the earth that is connected to the center of the earth through that place. When the solar altitude angle is 90°, the solar radiation intensity is the highest. The greater the degree of oblique exposure of Taiyu Xiaoyang to the ground, the smaller the solar radiation intensity.

The solar altitude angle changes with local time and the declination of the sun. The sun's declination (equal to the latitude of the direct point of the sun) is represented by δ, the geographic latitude of the observation place is represented by (the solar declination and the geographical latitude are both positive north latitude and negative south latitude), local time (time angle) is expressed by t, and there is a formula for calculating the solar altitude angle: sin h= sin sin δ + cos cosδ cos t.

The altitude of the sun is 0 ° on the morning and dusk line, indicating that it is experiencing a diurnal cycle. The height of the Sun is greater than 0° everywhere in the day hemisphere, indicating daylight; The altitude of the sun is less than 0° everywhere in the night hemisphere, indicating night.

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The solar altitude angle is a geoastronomical concept that refers to the number of altitude angles of the sun's position in the sky relative to the strip Changping line. The solar altitude angle is usually expressed in degrees, and its value can be calculated based on factors such as the location of the earth, the date, time, and longitude. At a given location, the value of the solar altitude angle will change continuously in 24 hours, but its change pattern has a certain regularity.

Typically, the highest solar altitude angle occurs at noon, when the Sun's position in the sky is closest to due south and the altitude angle is tangent to the latitude of the place. The altitude angle of the Sun at sunrise and sunset is 0 degrees, and the Sun is at the same level as the horizon. The value of the solar altitude angle can have an impact on many applications, such as building design, meteorology, infiltration navigation, and energy.

In the field of solar energy, the ridge angle of the solar altitude is one of the bases for the calculation of power generation efficiency, which interacts with factors such as the angle of incidence of the sun and meteorological conditions to affect the power generation of solar panels.