Bright Sword Military System

Chapter 1315 Digital Map
I have something to update today, and the other two chapters will be released later. Book friends who can’t wait can read it tomorrow!
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"One is the calculation problem!" Su Liguo frowned and said, "Even if we can successfully detect the two positions of the cannonball, we only get its height and distance. We need to use these data to calculate the trajectory of the cannonball... no If you can’t figure it out, so what if you can figure it out? What advantage does it have over artillery observers? Can it be faster than them?”

Su Xin nodded silently after hearing this. This problem is indeed unsolvable. It is also calculation. It may be faster for artillery observers to manually observe and use trigonometric functions to calculate the position of enemy artillery positions. After all, trigonometric functions have proportions and tables. It can be checked that this can be solved by rote memorization, but using two points on the parabola to calculate the trajectory of the entire parabola... then you have to calculate it rigorously.

If the artillery detection radar mentioned by Xiaodongbei is slower than the artillery observer, then what is the significance of its development?

If there is any point, it is that the artillery observer can be saved and replaced by radar.

Therefore, Su Xin turned her questioning gaze to Wang Xuexin, and it is said that the discussion of this project should end here.

But Wang Xuexin didn't take this question seriously at all. He said confidently: "This question doesn't count, the next question!"

Just kidding, why did Wang Xuexin spend so much time developing computers?

If you can't even calculate the trajectory of a parabola, it's still a ghost computer!
"Leader!" Su Liguo refused to agree after hearing these words: "How can this not be counted? If this problem is not resolved, we don't need to bother about it, right?"

"I have a solution!" Wang Xuexin said, "As for the solution...I can't say for now!"

This is indeed impossible to say.

The Sun Never Sets side still requires it to be "top secret". If others know that the Eighth Route Army has a machine that can be used for calculations, will they think of the "universal decoding machine"?

Although the enemy may not necessarily link the two together, as long as the secret is revealed, other things will soon be involved. Wang Xuexin can't take this risk.

Seeing that Su Xin and Su Liguo were still a little worried, Wang Xuexin said: "I can guarantee that as long as our radar can detect the position of the shell and give two points of data, we can immediately get the trajectory of the entire shell. ..."

"What kind of 'immediately' is this 'immediately', Xiao Wang!" Su Xin asked, "Can it be faster than the artillery observer? If not..."

Wang Xuexin couldn't help laughing, this girl actually compared the speed of the artillery observer with the computer.

But it's no wonder that in this era, who would have imagined the existence of such a machine, which can produce results in seconds for such complex calculations.

Wang Xuexin didn't say much because he couldn't reveal the secret. He could only answer: "Let's put it this way, when the shells are still flying in the sky, I can give the answer!"

At this moment, Su Xin and Su Liguo were stunned. They looked at each other and saw shock and half-belief in each other's eyes.

I was shocked because the person who said this was Xiao Dongbei, and if Xiao Dongbei said that, he would probably be able to do it.

He was dubious because it was a cannonball, and its flight speed was calculated in seconds, hundreds of meters per second, and it only took about half a minute for a cannonball with a range of ten kilometers to land from the moment it was fired.

What's more, when the radar can observe the shell, the shell is already in mid-air. When the radar detects two points and gives the data of these two points, the shell is about to hit the ground, right?
And Wang Xuexin actually said that the data can be obtained before the shell hits the ground...that is, it takes a few seconds to calculate and get the result. This time is not enough to read the data once, right?It can also calculate the entire trajectory!

Of course, Su Xin and Su Liguo did not expect that such a calculation should not be too simple for a computer, even a backward relay computer would not take a few seconds.

The two wanted to return to their thoughts, and they knew that this should be a military secret without Wang Xuexin saying anything, so they didn't ask any more questions.

Su Liguo was silent for a while, then continued to analyze according to Wang Xuexin's hypothesis: "If, as the regiment leader said, we can calculate the result so quickly, it is indeed much faster than the artillery observers, and it is of practical value and necessary for research and development..."

Su Xin couldn't help but raised her head towards Wang Xuexin, and said, "Xiao Wang, don't brag, if you can't figure it out by then, our arsenal's efforts will be wasted!"

Wang Xuexin patted his chest with an "ah" and said, "Don't worry, it's nothing serious!"

Seeing Wang Xuexin's confidence, Su Liguo couldn't say anything more. He continued: "Even if we can solve all these problems, there is still one problem that cannot be solved... The parabola is calculated, but the reverse extension of the parabola The line is a line, and it can be extended infinitely, how can we know the exact position of the enemy's artillery positions?"

This time Wang Xuexin was stunned.

Although Su Liguo didn't analyze it in detail, Wang Xuexin understood it.

The reason why modern gun detection radars are useful is not only because computers can quickly calculate ballistics, but also because digital maps have appeared with the development of computers... Simply put, it is the digitization of maps. The map of the enemy's area is represented by numbers.

Only in this way can the artillery radar calculate the trajectory of the artillery shell, because there will be an intersection point between the reverse extension line of the ballistic parabola and the digital map, and this intersection point is the height of the enemy artillery position.

If the altitude is not known and the trajectory is only calculated, the artillery will still be unable to determine the position of the target, and of course it will not be able to suppress it.

This made Wang Xuexin fall into deep thought.

Because this is no small problem, without a digital map means that everything he has in mind is impossible to achieve.

At the same time, Wang Xuexin also understood why there was no artillery detection radar during World War II.

This is not to say that others are stupid... What Wang Xuexin can think of is the idea of ​​using radar to detect shells to push back the enemy's artillery positions. There are so many scientists in the world and they are still in a state of war. How could they not think of it?

These scientists are trying their best to think about how to kill the enemy, and they are still under the pressure of "destroying the country and destroying the family".

The only explanation is that they also thought of it but couldn't do it because of immature conditions.

What can I do now?

Wait for digital maps?
Or make your own digital map?
Wang Xuexin is not sure whether the technology of this era has reached the level of making digital maps.

If not, the gun detection radar may really "die before it leaves the army".

(End of this chapter)