Chapter 577 GPS Navigation Interference Test (page 12)
When your boss asks you to go home for dinner, even if it is a question, it cannot really be treated as a question——
If you fail to answer, it will be difficult to maintain this working relationship in the future.
What's more, Chang Haonan subjectively really wanted to pay a visit.
Ding Gaoheng’s wife is one of the main persons in charge of my country’s underwater launch vehicles, that is, submarine-launched ballistic missiles.
An old man who is famous but very low-key.
Seeing Chang Haonan nodding almost without hesitation, Ding Gaoheng happily put on his hat and picked up his packed briefcase:
"Let's go, take my car and go together. After eating, let Xiao Zhu pick you up..."
……
At the same time, Jinling and Dajiaochang Airport.
Xu Yang jumped out of the passenger seat of a Jiefang truck, and together with several people in the car behind, carefully unloaded a cylindrical device placed in the cargo box onto the tarmac.
Compared with Beijing, which is still a bit chilly in the early morning or evening, the climate along the Yangtze River has clearly entered mid-spring.
However, for Xu Yang, a native of the capital, the climate here is not easy to adapt to.
She sniffed slightly, feeling a little uncomfortable from the sycamore catkins flying all over the sky just now.
But at this critical moment, she couldn't care less.
"Gong Guo, go to the back and unload the test trolley and push it over here, and then do a final check to make sure there is no fault!"
"For the others, one group will go to the test area to set up measurement and control points, the second group will go to the end of the runway to prepare to recover the test equipment, and the third group will debug the jammer..."
Amidst the noise, Xu Yang picked up a large speaker from the car and gave instructions to the crowd in an orderly manner.
About half a month ago, she was in the laboratory when she suddenly received a call directly from the director of the Commission of Science, Technology and Industry for National Defense.
The other party conveyed Chang Haonan's message, saying that the military GPS receiving module they had been waiting for had been obtained and was on its way to Jinling Electronics 14th Institute. He hoped that she could go there as soon as possible to wrap up the GPS jamming equipment project.
So, Xu Yang rushed from the capital to Jinling.
In fact, 14 had completed the main hardware part of the GPS jammer before. What Xu Yang needed to handle this time was mainly to write the software part according to the new algorithm and perform performance testing of the final product.
According to Chang Haonan and Xu Yang's expectations, the main function of this jamming device should be to deal with GPS-guided munitions, such as cruise missiles or satellite-guided bombs such as JDAM.
But the testing process certainly cannot be done this way.
On the captured unmanned submarine, there were only two sets of GPS receiving modules including backup. One of them has been installed in the jammer and is used to translate and distribute signals. The one that can be used to test the jamming effect is Only one remains.
Not to mention that China currently does not have ready-made satellite-guided weapons available. Even if it did, it would be impossible to drop this only remaining set of weapons from the sky.
Then it becomes a one-shot deal.
If the first test doesn't go well, you won't even have the chance to try it again.
What's more, Chang Haonan also wants to maximize the use of the remaining value after the test process is over, and then build a second jammer...
Therefore, the interfered object in the final test plan became a GPS-guided car that can perform simple turning operations and drive to the predetermined target.
However, this guidance is not automatic driving.
The action logic of the car is the same as that of a bomb. After discovering that the route has deviated, it will turn in the other direction until it coincides with the set route, without avoiding any obstacles in the middle.
Therefore, this test must be conducted in an extremely open area.
After choosing a lot, only the airport barely meets this condition.
So I made some contact with the Air Force and borrowed the Daqianchang Airport where the planes had returned in the evening as the venue.
"XCMG, we checked it and found no problems with the hardware and software."
Guo Lin pushed a metal car about half a person's height from a distance and said as he walked:
"But before formal testing, I think it's better to conduct a set of controlled experiments to see how it works without interference."
Xu Yang nodded decisively:
"Let's go."
Then, together with several fellow engineers, he pushed the car towards the set starting point for the test.
"XCMG, with this GPS jamming pod, I feel like Mr. Chang is very anxious?"
On the way, Guo Lin asked casually:
"In the past half month, he called me four times to check on my progress. Although he didn't say much each time, it shouldn't be so frequent."
"Four times?"
Xu Yang raised his eyebrows slightly:
"Why didn't I know this even once?"
Guo Lin wiped the sweat from his forehead:
"Uh... Mr. Chang is worried that you are under pressure, so he always tells me not to tell you until the project enters testing."
Hearing this answer, Xu Yang pouted slightly with a complicated mood.
In her scientific research career, this was the first time that someone else took special care of her progress.
Before, she had always slowed down to adapt to others.
"Fine……"
Xu Yang casually smoothed his hair that was messed up by the wind:
"However, he did inadvertently tell me before that he hopes this thing can be put into use before next spring. He also said that if used properly, it can have the effect of making a huge difference."
"Before next spring?"
Originally, Guo Lin just asked casually, but this sudden moment made him a little strange:
"Is there anything special about this time...or does Mr. Chang have any other plans?"
"I don't know about that..."
While talking, the car has been pushed to the starting point of the landing runway.
After a while, it will be "released" here to simulate the trajectory of a GPS-guided bomb on a flat surface.
“路径坐标点1-10设定在跑道上面，11-14沿着滑行道设置，16-20进入停机坪……”
After all, the maneuverability of a four-wheeled car is much better than a bomb that can only rely on its wings, so in order to better reflect the interference effect, the path setting is relatively complicated.
It is actually the process of an airplane landing on the runway and then taxiing back to the apron along the right taxiway.
"Okay, the setting is complete and ready to be released!"
Following Xu Yang's order, the tester turned on the battery power.
Immediately afterwards, this slightly crude car drove forward unsteadily.
Xu Yang and Guo Lin followed all the way behind, observing its trajectory.
Because the GPS accuracy in the 90s was still relatively limited, if you look closely, it is actually a bit confusing.
However, in general, we are still moving along the preset route.
Ten minutes later, the two people and one car successfully arrived at the predetermined coordinate point, which was the location of the motorcade on the tarmac.
