Latitude and longitude solar terms

Question 1:A

Question 2: D.

Test analysis:

Question 1: Beijing is located in the northern hemisphere, and the sun shines directly on the equa

Question 1:A

Question 2: D.

Test analysis:

Question 1: Beijing is located in the northern hemisphere, and the sun shines directly on the equator (latitude 0) at the autumnal equinox. At 22: 49 Beijing time, the longitude of local time 12:00 should be: 22: 49 and 12 difference 10 hour 49 minutes. According to the difference between 1 longitude and time, we can know that the distance between the two places is 162 15'.

The latitude and longitude of the direct point is located on the west side of the central meridian 120 E in East Zone 8. According to the principle of adding east and subtracting west, push 120 E to the west, and the longitude corresponding to the direct point of the sun is 4215' w' w. So at the autumnal equinox, the longitude and latitude of the direct point are (4215' w, 0).

Question 2: When the latitude and longitude of the direct point is (4215' w, 0) and the local time is 1 1, the meridian of the local time is located on the west side of the meridian of the direct point of the sun, which is 5715' w, so the latitude and longitude are (.

Comments: This topic is very difficult. We will check the transformation of time and calculate the height of the sun through the autumnal equinox solar terms of Beijing time. Formula method is the "master key" of time domain calculation, which is always useful. The steps of calculating the area by formula method are roughly as follows:

The first step is to find the time zone: that is, to find a place's time zone by knowing its longitude. The conversion formula is: (longitude of a place +7.5) ÷ 15 = time zone where the place is located (the result is rounded off and the remainder is discarded). If the destination is east longitude, the eastern time zone is obtained; If the destination is west longitude, the western time zone is obtained. If the time zone of 130 E is required, use the formula to solve it as follows: (130+7.5) ÷ 15 = 9.2, take the integer 9 and discard the remainder 2. The time zone of this place is East District 9.

The second step is to find the regional time difference: there are two ways to find the regional time difference.

A. If both places are in the eastern time zone or the western time zone, then: time zone difference = (number of large time zones-number of hour time zones) × 1 hour;

B if one of the two places is in the eastern time zone and the other is in the western time zone, then:

Regional time difference = (number of eastern time zones+number of western time zones) × 1 hour (not exceeding international date line)

Or regional time difference =[( 12- number of eastern time zones) +( 12- number of western time zones)] × 1 hour (crossing international date line);

The third step is to find the time zone. The calculation of time zone can be divided into two cases: crossing the date line and not crossing the date line.

However, the date line: a. required regional time = known regional time+regional time difference (the required time zone is east of the known time zone);

B required regional time = time zone difference in the known region (the required time zone is west of the known time zone);

Transit boundary: a. required regional time = known regional time+regional time difference-1 day (required time zone is east of known time zone);

B required regional time = time zone difference of known region+1 day (required time zone is west of known time zone).

The fourth step, if there is flight time (that is, travel time), add travel time.

The simple conversion method of sun height is: find the noon sun height angle at a certain point, and use 90? Subtract the latitude difference between this point and the direct point of the sun.