The tree stick stood in the soil, its shadow falling straight to the ground.
Bi Fang marked the shadow position in the soil with slow and meticulous movements, just like a master repairing clocks in an alley, using tweezers to clamp parts and assemble them bit by bit.
If it hadn't been for what he said before, someone might have thought that Bi Fang was doing some kind of clock repair.
[Measurement of longitude and latitude, no, no, no one really expects a wooden stick to measure longitude and latitude?]
[Measuring longitude and latitude with a wooden stick? Is Fang Shen joking? 】
[As I was lying at home, I quickly turned on the GPS and took a look. I was scared to death. Fortunately, I was not the one who lost contact ()]
[Can the longitude and latitude be directly measured? If it could be measured, I, Fang Shijie, would stand upside down and have diarrhea on the spot, and then eat it!]
[Instead of trying to trick people into eating or drinking, why not show everyone how to pick a lock with a toothpick? 】
Not only new viewers don't believe it, but even many old fans are skeptical.
"Is it fake? How can the longitude and latitude be measured with a wooden stick? Nowadays, anchors should teach some basic methods when they lie to people, right?" On the subway, a man was hanging from a hanging ring and couldn't help but cry out.
The subway was crowded, so he stood here for a long time and accidentally noticed the two little girls in front of him watching the live broadcast. He glanced at it curiously and saw this scene.
On the phone, a man who was a little bit more handsome than he was when he was younger was boasting a lot. Then he stuck a wooden stick in the ground and made two marks casually, saying that he would use this to determine the longitude and latitude.
There is no method to deceive people, how to break it?
Only a girl who has never been out of society would believe it. She is pretty, so why is she so brainless?
Yang Ziyan looked back and glanced at the man who looked like an office worker slandering her idol. Can she bear this? She immediately retorted: "How is it impossible? Just because you can't do it doesn't mean that Fang Shen can't do it either. He is the world's number one survival master.
!”
"Fang Shen? Master of Survival? Still No. 1 in the world? You're laughing your ass off. Not to mention the title of scumbag, who is the No. 1 in the world? Is there a competition?" The man dismissed it.
He pointed at Yang Ziyan and her classmates: "You little girls don't know how to go to school, and you only chase stars and Internet celebrities all day long. In fact, these star girls are dead, and they are even more useless. This one is more handsome, but it's the same
, it is better to read two more books to enrich yourself."
Just as Yang Ziyan was about to retort, a classmate on the side had already preempted her: "Uncle, do you never read the news? Are you so self-righteous? My grandpa can read news online. Is there anyone who can't read the news? No, no.
Bar?"
The man who was stabbed in the middle by an uncle choked up a mouthful of blood.
"Oh, I understand. My uncle must be under too much pressure to work overtime, his boss is very cruel, and he has no hope of promotion. His wife is messing with others and his daughter is in early love, so he has no time to surf the Internet! Hey, it's so miserable, Yanyan, let's go, don't
If you stay with him, depression will be contagious!"
The classmate spoke as fast as a bullet coming out of a gun, and then pulled Yang Ziyan to push through the crowd and go elsewhere, leaving only the stunned office workers.
Yang Ziyan on the side gave a silent thumbs up.
But even if the two of them ran away, the man could still vaguely hear what they were talking about.
"I'm really pissed off. When Fang Shen was fighting a pack of wolves, this guy didn't know which corner he was constipated in."
"Okay, okay, since he is so miserable, we have to take stock of him." Yang Ziyan covered her mouth and snickered.
Worri.
This uncle can bear it, but my aunt can't either.
The man who was stabbed in the sore spot was furious and couldn't swallow his breath. He just saw the name of the live broadcast room!
The man took out his mobile phone and downloaded the Langya APP. When he opened it, he saw Bifang's live broadcast at first glance.
He doesn't believe it anymore. No one can see this kind of deception?
No, he really got on with it today. If he couldn't expose the other person, he wouldn't get off the subway!
"Calculating longitude and latitude is actually not difficult. It only requires three factors: solar shadow, direction and date. Don't think it's incredible. What I rely on here is not a stick, but the sun."
Bi Fang pointed at the sun hanging high in the sky. The weather was very good today. The sun rose above the clouds, and the sunlight spread flat against the clouds, casting the shadows of the trees on the ground.
"From a phenomenological point of view, we can regard the ground as a plane and the sky as a ball, called the "celestial sphere." The sun follows a circular trajectory on the celestial sphere, rising in the east and setting in the west."
"Not just the sun, but all celestial bodies, including the moon and stars, are all on this celestial sphere, rising in the east and setting in the west, as if they are rotating around an axis. This axis is the rotation axis of the earth."
"The position on the celestial sphere that this axis points to is the north and south celestial poles. We rely on the positioning of these celestial bodies to confirm our position on the earth's plane."
Bi Fang briefly explained the principle and continued to practice, marking along the shadow just now.
"First we have to set up a pole on the level ground. Remember, it must be as level as possible so that the measured data will be accurate. Then we will continue to draw its shadow. When the shadow is the shortest, record the length of the shadow at this time.
Direction, this is due north."
"Then measure the length of the shadow and the pole at this time, use trigonometric functions to calculate the sun's elevation, and then consider the number of days to measure the distance between the spring and autumn equinoxes and the summer and winter solstice. The day I set out was the 21st, so today is the 22nd, and then
Use trigonometric interpolation to calculate the latitude of the direct sun point on that day, and add it to get the local latitude value."
"In addition, after getting due north, record the time when the sun passes due south. Because the capital time uses the time of 120 degrees east longitude, the longitude can be obtained by using the time difference between the recorded time and 12 o'clock."
"However, this method is complicated to calculate and may not be suitable for everyone. As the saying goes, if you don't know math problems, you can only write down a solution."
【What the hell, why can’t I understand this? 】
[If you don’t know the big political questions, you can write them randomly. If you don’t know the English composition, you can copy and understand them. But if you don’t know the big questions of mathematics, you can only write a fucking solution.]
【Algebraist】
[Unexpectedly, I am already living in the wilderness, and I still have to do math problems? 】
Many viewers suddenly collapsed after hearing the series of explanations.
Bi Fang on the side began to observe the sun's shadow. Fortunately, the shadow was shortening and the time was only close to noon, so he did not miss the shortest point. If he missed it, Bi Fang would have to wait until night to measure the longitude and latitude with the help of Polaris.
Ten minutes passed, and while Bifang was chatting with the audience, the shadow finally reached its shortest point and began to lengthen.
Bi Fang hurriedly made a mark and started making formulas with branches on the soil beside him. At this time, several pieces of white paper and pencils were suddenly handed to him.
Bi Fang subconsciously took the pen and paper and was stunned when he saw Etienne in front of him: "Where did you get this?"
Etienne scratched his head in embarrassment: "I brought my homework here and put it on the plane. There are still a few pieces of scratch paper left."
【Hey guys, is there such a thing as homework?】
[Niubi, you didn’t forget to bring your homework when you ran away, you are a good student at first sight]
Bi Fang was also confused by this ridiculous operation, but it was a lot more convenient to have a pen and paper. Then he sat on a rock and wrote a series of formulas with a pencil that the water friends didn't realize were strange.
[That’s it, if you don’t know math, won’t you be able to get a job? 】
[This formula makes me confused, Lao Fang actually calculated the function by hand! 】
【I have never been so serious in class. I am really sorry for my math teacher.】
"Actually, it doesn't matter if you don't know how. Real wilderness survival rarely requires this method to confirm longitude and latitude, but this mission is quite special."
"And if that doesn't work, you can also wait until night and use Polaris to measure. In the wilderness, the stars are very clear. This method is also simpler. I will teach you when I have the opportunity at night."
Bi Fang immersed himself in calculations, biting his pen from time to time. Many functions were not accurate without a calculator, so he could only find an approximate value and substitute it in. The process made the audience dizzy.
Just when Bi Fang calculated the answer, the paper went dark.
Strange, why it has become darker.
Etienne looked up.
Lead-colored clouds pushed over from the southeast, and the thick clouds gave people an ominous premonition.
Etienne suddenly remembered what Erwan said, there will be a blizzard the day after tomorrow.