I have something to do today and will update later. The other two chapters will be posted later. Book friends who can’t wait can read it tomorrow!

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"One is a calculation problem!" Su Liguo frowned and said, "Even if we can successfully detect the two positions of the cannonball, all we can get is its height and distance. We need to use these data to calculate the trajectory of the cannonball... No

If you can't calculate it, what can you do if you can calculate it? What are the advantages compared with artillery observers? Can you be faster than them?"

Su Xin nodded silently after listening. This problem cannot be solved. It is also a calculation. It may be faster for artillery observers to manually observe and use trigonometric functions to calculate the location of enemy artillery positions. After all, trigonometric functions have proportions and tables.

It can be found 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 meticulously.

If the artillery detection radar mentioned by Xiao Dongbei calculates slower than an artillery observer, then what is the point of developing it?

If there is any significance, it is that artillery observers can be saved and replaced by radar.

Therefore, Su Xin turned her questioning eyes to Wang Xuexin. Normally, the discussion on this project should have ended here.

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

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

If it can't even calculate the trajectory of a parabola, then it's a hell of a computer!

"Captain!" Su Liguo refused after hearing this: "How can this not be counted? If this problem is not solved, we don't need to bother with it, right?"

"I have a solution!" Wang Xuexin said: "As for what solution...I can't say for the time being!"

This really cannot be said.

The one where the sun never sets still requires it to be "top secret." If others knew that the Eighth Route Army actually had a machine that could be used for calculations, would they think of the "universal decoding machine"?

Although the enemy may not necessarily connect the two, as long as the secret is revealed even a little bit, everything else will soon be implicated. Wang Xuexin cannot 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 artillery shell and give two points of data, we will be able to get the entire trajectory of the artillery shell right away.

…”

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

Wang Xuexin couldn't help but laugh. This girl actually compared the speed of an artillery observer with a computer.

But it's no wonder, no one in this era can imagine that such a machine actually exists, which can perform such complex operations and produce results in seconds.

Wang Xuexin was worried that he could not reveal the secret, so he did not say much. He could only reply: "Let's put it this way, I can give the answer while the cannonballs are still flying in the sky!"

Su Xin and Su Liguo were stunned. They looked at each other and saw shock and doubt in each other's eyes.

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

I was dubious because it was a cannonball, and its flight speed was measured in seconds. A cannonball with a range of several hundred meters per second and a range of ten kilometers only took about half a minute from the moment it came out of the barrel to the time it landed.

What's more, when the radar can observe the artillery shell, the artillery shell is already in mid-air. By the time the radar observes two points and gives the data of these two points, the artillery shell is about to land, 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. Even reading the data once is not enough time, right? The entire ballistic trajectory can also be calculated!

Of course, Su Xin and Su Liguo did not expect that calculations like this would not be too simple for a computer. Even a backward relay computer would not take more than a few seconds.

The two wanted to think about it, but when Wang Xuexin didn't say anything, they knew that this was probably a military secret, so they stopped asking any more questions.

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

Su Xin couldn't help but raised her head towards Wang Xuexin and said: "Xiao Wang, don't brag. If you don't calculate it by then, our arsenal's efforts will be in vain!"

Wang Xuexin said "Alas" and patted his chest and said, "Don't worry, this is nothing to worry about!"

Seeing that Wang Xuexin was so confident, Su Liguo couldn't say anything else. He continued: "Even if we can solve all these problems, there is still one problem that cannot be solved... The parabola has been calculated, but the reverse extension of the parabola

The line is a line, and it can be extended indefinitely. How can we know the exact location of the enemy's artillery position?"

At this point, Wang Xuexin was stunned.

Although Su Liguo did not analyze it in detail, Wang Xuexin understood it.

The reason why modern artillery detection radar is useful is not only because computers can quickly calculate ballistics, but also because the development of computers has led to the emergence of digital maps... Simply put, it is map digitization, and the map of the enemy's area is represented by numbers.

Only in this way does it make sense for the artillery reconnaissance radar to calculate the trajectory of the artillery shell, because the reverse extension line of its ballistic parabola and the digital map will have an intersection point, and this intersection point is the height of the enemy's artillery position.

If the height is not known but the ballistic trajectory is simply calculated, the artillery still cannot determine the target's location and of course cannot suppress it.

This made Wang Xuexin fall into deep thought.

Because this is no small problem, without digital maps it means that everything he considered 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... The only thing Wang Xuexin can think of is the idea of ​​using radar to detect artillery shells and push back against enemy artillery positions. There are so many scientists around the world and they are still at war. How could they not think of this?

These scientists are trying every possible means to think of how to kill the enemy, and they are still under the pressure of "the country is destroyed and the family is destroyed".

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

What can we do now?

Waiting for digital maps to appear?

Or make your own digital map?

Wang Xuexin is not sure whether the technology of this era has reached the level of producing digital maps.

If not, the artillery reconnaissance radar thing may really "died before it was launched".
Chapter completed!