This new positioning method mentioned by Wang Xuexin is actually the passive radar developed in modern times.
The reason why Wang Xuexin did not directly mention passive radar is because it is not that fast to develop this radar, and the other is because it is difficult to achieve precise positioning, even in modern times.
The principle of passive radar is actually very simple: if the enemy has a radar that continuously emits electromagnetic waves to detect targets, then in principle we only need to use two passive radars to receive electromagnetic waves to get the direction of the emission source, and then combine the numbers according to the direction.
The map draws two straight lines, and the intersection of the two straight lines is the location of the emission source.
The theory is like this, but in actual application, this "direction" is a range and cannot be accurate to a straight line, because no matter how sharp and accurate the passive radar is, it cannot determine a straight line directly to the emission source based on the electromagnetic waves. It can only determine that the electromagnetic waves are from a certain error.
Emitted within range.
Therefore, what can be obtained is the intersection of two "ranges", and what is finally obtained is a region.
And because of the principle of "a slight difference makes a thousand miles" in angle... It's like shooting. Although the muzzle of the gun is only a little bit off, the error will be very large because the target is far away.
Therefore, the area detected and solved by passive radar is also very large, and it is even too large to be covered by artillery fire.
Therefore, if you want to accurately destroy the enemy's artillery detection radar, you must rely on "opening the back door."
As for why Su Xin was asked to develop passive radar...Wang Xuexin was preparing for future anti-radiation missiles.
Wang Xuexin will not participate in the report. Su Xin will make a detailed report to the headquarters based on the results of the discussion.
At that time, the commander and the chief of staff were still worried about whether to use artillery detection radar for the transaction. After receiving the report, they couldn't help but slap the table and cheer.
"Now all the problems are solved!" The leader laughed loudly: "The problems of public opinion, the oil problem, and the problem that the artillery detection radar will be turned against us by the enemy, all of them disappear! This Wang Xuexin, there is
Two brushes!"
"Yes!" the chief of staff sighed while holding the meeting report: "It should be said that not only do these problems no longer exist, but they may also dig two big holes for the recalcitrant army and the Japanese: once this artillery detection radar is sold, the recalcitrant army and the Japanese will fight against each other.
Just fight. If they come to fight our Eighth Route Army... not only will they be discovered by our army as soon as they meet, but they will also let our army know the location of their artillery as soon as possible! Kill several birds with one stone, kill several birds with one stone! That's what Comrade Wang Xuexin would think of.
This is the solution!"
Then the chief of staff suggested: "Chief, what do you think... let Comrade Wang Xuexin manage Taiyuan?"
The leader thought for a while, then nodded and said: "What a good idea! Taiyuan is different from other cities. It has an airport, a military factory, coal mines, steel plants, textile factories and other factories. This is not just a city, but
It is a centralized place for our military to develop industry and military equipment, and it is also a cradle for scientific research and development of military and industrial talents. No one is more suitable than Comrade Wang Xuexin!"
It can be seen from this that the chief has a deep understanding of the industrial status of the Eighth Route Army: at this time, the industrial layout of the Eighth Route Army is actually not very reasonable. For example, scientific researchers and rifle production lines are in Sanjiadian, the "La 5" production line is in Laheba, and the automobile production base.
In Ningbei Township again...
These industries are scattered in the east, west, north and south of the base area, and Wang Xuexin is in Liyuan. Even if he wants to have a meeting with the scientific research team, he has to take a flight from Eagle Jiang.
In the past, there was no way around it. The transportation in the base area was backward and there was no suitable place to form an industrial settlement. At the same time, there was also a concern that too much industry would be bombed by the Japanese.
Taking over Taiyuan is different. Wang Xuexin and the scientific research team are transferred to Taiyuan. If they need to go out for a meeting, it will only take ten minutes by car at most.
However, the chief did not issue the order immediately. He waited for six or seven days.
In the past few days, the Eighth Route Army successively captured Pingxing Pass, Niangzi Pass and Tianjing Pass... Most of the attacks on these passes were carried out by surprise attacks at night.
The reason why they choose to launch a raid at night is not because the Eighth Route Army is good at night fighting, but because the Eighth Route Army has artillery detection radar... The artillery detection radar does not affect its use at night, but it is difficult for the Japanese artillery observers to find targets, especially infantry, at night.
As a result, the Japanese artillery was always inaccurate and would be blown up by the Eighth Route Army artillery as soon as it fired. The aircraft could not participate in the battle at night and was suppressed by the Eighth Route Army the whole time.
Next, the only ones facing the Japanese are Zijingguan and Huangyuguan.
However, the Japs had no intention of guarding these two passes... The Japs seemed to have realized one thing: when the Eighth Route Army had artillery detection radar, it was impossible to hold such a narrow pass where the troops could not be deployed.
There is an old saying: "When we meet on a narrow road, the brave wins."
The pass is a narrow road, and the Eighth Route Army is braver than the Japanese. More importantly, the Eighth Route Army's "bravery" is reflected in the artillery detection radar... With its help, it can not only suppress the Japanese artillery, but also clean up the Japanese bunkers and gun towers along the way.
The Japanese saw that this battle was unwinnable, and that there was no point in continuing like this except increasing casualties, so they buried a large number of mines at the remaining two passes, blasted the fortifications, and then voluntarily withdrew.
At this point, all of Shanxi was declared recovered.
This is of great significance to the Eighth Route Army, because as mentioned before, Shanxi is a "closed but not closed castle". The Eighth Route Army only needs to use a small number of troops to guard these passes and the Japanese will not be able to invade Shanxi.
However, "unable to attack" seems inaccurate. Okamura Neiji thought that the Eighth Route Army was "unable to attack" and capsized...
Of course, the Japanese did not have helicopters, so the Eighth Route Army did not need to worry about this.
On this day Wang Xuexin was sending a telegram to Chu Yunfei.
Although the matter had been settled long ago, Wang Xuexin was worried that the reply too quickly would make Chu Yunfei suspicious: "How could the Eighth Route Army make a decision so quickly on such a big matter? Shouldn't there be a meeting to discuss it and then dwell on it for a few days?"
Therefore, Wang Xuexin deliberately waited for a few days, and then sent a telegram to Chu Yunfei in a very helpless tone: "Brother Chu, with my mediation, the chief finally agreed to the deal. Please contact Chongqing as soon as possible."
!”
When Chu Yunfei read the telegram, he burst out laughing with joy: "Everyone says that you, Xiao Dongbei, have great magical powers. Don't you have to give in today?"
After saying that, he immediately sent a telegram to Chongqing asking them to send people to negotiate with the Eighth Route Army to discuss the transaction.
At this time, Wang Xuexin received a telegram from the headquarters: "Order the aviation regiment and headquarters to move to Taiyuan Wusu Airport! Comrade Wang Xuexin will be fully responsible for the defense of Taiyuan!"
Wang Xuexin couldn't help but be stunned. This was a switch from a remote Liyuan to a city.
but……
Wang Xuexin looked at the mountains outside the window, feeling a little reluctant to stay here for a long time.