At around 5 a.m., Gu Cheng's helicopter landed in Jinguancheng (and stopped to refuel on the way), and the flight time accumulated to 5 hours. Pen % fun % Pavilion www.biquge.info

By the time he came down, he had gathered all the information he needed. Some follow-up deployments were also made in the air.

ACCORDING TO THE DETAILED ANALYSIS OF LOGISTICS DATA AND THE INTERNAL REPORT OF UNICOM'S PERFORMANCE, IN THE EIGHT OR NINE DISTRICTS AND COUNTIES WHERE THE MOST SEVERE DISASTERS, SERIOUS LARGE-SCALE COLLAPSES AND MOUNTAIN DAMS, THERE ARE 2,215 AIMI USERS AND 1,836 IPHONE USERS.

At present, 1,224 and 1,040 units are in the relatively safe zone, respectively. 991 were unaccounted for and 796 were not in the service area after the earthquake. ”

As for other 2G non-smartphone users, there is no statistics on this, because other mobile phones in China did not have GPS or Beidou navigation functions at that time. The wireless base station can only roughly judge the user's cross service area and general direction in a certain base station, and cannot be used for precise positioning (unless some criminal investigation and listening technology is used, but it is very troublesome to not talk to the state, so it is not specifically introduced).

WHEN LEI JUN HANDED THIS SET OF DATA TO GU CHENG, GU CHENG COULDN'T HELP FROWNING: "OBVIOUSLY THE SALES OF IPHONES IN THE WHOLE COUNTRY AND IN SICHUAN AND SHU PROVINCES ARE HIGHER THAN OURS, WHY ARE THERE MORE PEOPLE USING OUR MOBILE PHONES IN THE DISASTER AREA?"

Lei Jun was also a little helpless, and explained: "No way, the hardest hit area this time is not the main urban area of Jinguan City, but in the countryside, the people in those places are still relatively poor, and in several counties combined, it would be good to have thousands of people who could afford to buy a mobile phone for two or three thousand yuan." AFTER ALL, OUR AIMI MOBILE PHONE IS SEVERAL HUNDRED DOLLARS CHEAPER THAN THE IPHONE, AND IT HAS NOT EXCEEDED 3,000 YUAN, SO THESE AREAS STILL BUY US MORE. ”

Gu Cheng thought that this was indeed the case, so he didn't dwell on it.

"Among the 581 people who used Aimi's mobile phone, how many of them were 16G memory version + Beidou navigation through Tmall's sales data, and how many were GPS versions of 8G memory?"

"There are even fewer of them, only 356 people have bought the Beidou version, and the remaining more than 600 trapped people have bought the basic version. ”

"Well, that's it, it's one that can save one. Gu Cheng was a little helpless, but there was no way, after all, he was born in the 10s in his later life, these are all historical events before he was born, and it is normal to remember clearly.

Moreover, the specific time point and distribution of today seem to be slightly different from another time and space, and even if you remember it, it is impossible to be accurate to a certain day and place.

"I'll contact Chief Engineer Cheng of the Science and Technology Commission in charge of Beidou, Lao Lei, after the helicopter here and other rescue forces we have deployed are in place, you can help coordinate it. ”

Lei Jun hurriedly agreed, and immediately went to make arrangements. During this period, many media rushed to cover and grab the news, and there was quite a lot of uproar.

In the afternoon of the same day, a group of heavy helicopters rented from Lucia Lao Maozi rushed to Jinguancheng from the Omsk base in Central Asia.

There were Lao Maozi pilots on it, and there were also Chinese pilots who were temporarily assigned.

Because the helicopter is easy to take off and land, just find a platform, so Gu Cheng's people directly rented a fairly good and flat parking lot in the city. As soon as the plane landed, it was deployed, and other rescue units could not come and rush to embezzle.

"Quick, get this satellite receiver up. There are also several sets of analog base stations, yes, these demolition machinery and small lifting equipment are also separate!"

"Don't waste the engine room of the M-26, load heavy machinery! The M-8 is mainly used for positioning!"

A group of technicians with complex components were busy for a while, and several of them set off with the rescue team and flew into the blue sky.

……

Ding Tianming is a field measurement engineer at a technology company in Hujiang, and the company's name is not an outsider.

That company is the application development unit of the terminal acceptance equipment in the Beidou navigation system, and it was also a cooperative supplier of YY Electronics in the Aimi mobile phone project.

The so-called "terminal receiving device" is something like a mobile phone navigation chip or a car navigation module.

Sitting on a Mi-8 helicopter, Ding Tianming debugged the satellite signal receiver and a bunch of other equipment in his hand.

His duty today is to conduct a signal search on the ruins of the agricultural PF area and the abandoned highway around the dammed lake in a certain county to confirm whether there is an Aimi mobile phone carrying the Beidou navigation chip in the vicinity that is in standby mode.

This area is obviously mountainous agricultural land, and the houses are sparse, but they are all bungalows built by the farmers themselves, and the quality of the construction is quite unguaranteed, and most of them are in ruins.

However, because many families in this place are going out to work, the vacancy rate of houses is very high, and I don't know which ruins are pressed under the rubble and which people live, if the ruins are moved away, it will delay the rescue efficiency too much.

Therefore, if you know where there are people in advance, and then go to the rescue team to indicate the direction and accurate excavation, it will be several times more efficient.

This trick is actually not new - oh, or it is relatively new to the people of this world, but it is not new to Gu Cheng who thinks of this.

Gu Cheng in later generations, although he can't remember the specific information of the disaster in 08, but in 2011, the Fusang people in the earthquake at the nuclear power plant on a certain island occurred after Gu Cheng was born, and because of the rescue of the earthquake, there were many scientific and technological discoveries, which impressed him deeply.

In another time and space, when the Fuso people were shocked in 2011, mobile phone positioning in Fusang was not yet popular, but there were more Fuso slag houses, and many people bought Nintendo's game consoles.

At that time, Nintendo came up with a new portable game console, which was originally designed to "help you find nearby friends so that you can automatically connect", so it was equipped with a wireless communication chip with specific recognition. Later, when the Fusang rescue team searched and rescued in a sparsely populated area, they brought a bunch of game consoles to identify whether there was the same game console nearby, and once there was, they excavated the ruins and dug out the trapped people below (of course, it may be a corpse, or it may be that the person is not there, but the game console is at home).

This trick will not be uncommon if it is two years away - everyone can directly shake it with Momo WeChat, and they can know if there is anyone nearby (at least whether there is a mobile phone). However, at that time, it was quite a bit of a presence for Nintendo in Fuso.

Now Gu Cheng's idea is obviously born out of that plan, and it is more mature.

He already has a mobile phone equipped with 3G and satellite navigation. Although the mobile phone YY has not developed a "shake" now, it is still easy to find the location of the mobile phone if there is a professional device that actively searches.

"There are many navigation signals in the house below! It is suspected that many people are trapped!" Ding Tianming issued a warning when the plane flew over a piece of ruins, and gave specific coordinates.

The ground search and rescue team immediately sent a few people and some portable machinery to start excavating at a fixed point. The helicopter has already moved on to the next area.

After indicating seven or eight points, the rescue team on the plane received a message that the two points initially indicated had been accurately excavated, and a total of five trapped living people and two bodies had been crushed to death.

The people on the plane were excited and continued to work. By the time they landed in the evening to refuel and rest, a total of 26 people had been rescued and the ruins of about two townships had been cleared.

AMONG THE 26 PEOPLE, 15 ARE AIMI USERS AND 11 ARE IPHONE USERS. Gu Cheng's search team is very conscientious, and not only saves his own customers, but also the customers of competitors.

And the two townships just searched are lucky, Unicom's 3G base station has not been destroyed, and has been working, so even if it is just a mobile phone with a GPS chip, there is no function of satellite SMS messages, as long as the machine receives satellite signal positioning, it can also be automatically sent and shared to the base station, and then intercepted by the search team.

However, the further down they searched, the worse the environment became.

When the pilot, field test engineer, and debugging personnel were eating together, Ding Tianming saw Jin Ping, the person in charge of the site and his current leader, come over and explained two sentences to him:

"Hurry up and eat, debug the simulated pseudo base station for a while, I just heard the above say, the two townships that I want to go to at night, the Unicom base station has been completely destroyed in the earthquake, the GPS signal can not be sent to the base station, and they can't send it back to the satellite. We can only count on this temporary compensator provided by Unicom. Unicom will not send people, and there will be fewer people on the plane to test, and more equipment can be brought. ”

Ding Tianming is engaged in technology, of course he knows what Jin Ping is talking about - in big cities, because of the complexity of buildings, many large office buildings have poor mobile phone signals, no matter how the base station is arranged, it is useless, at this time, the property owner will generally ask the operator to set up a signal compensator in the building to transfer and amplify the signal outside.

Nowadays, after the destruction of a fixed base station in an area, it is obviously the quickest way to compensate with a helicopter's on-board signal compensator.

The only problem is that the effect of the signal compensator is definitely not as good as that of the genuine base station, so if it is a Huawei mobile phone, the antenna RF performance is against the sky (although 08 Huawei has not started to make mobile phones) may also be able to ensure that the signal is received, and other mobile phones that have done a bad job in RF will be closed.

"Don't worry, I'll step up the debugging immediately, and I won't miss something. Ding Tianming agreed, took a few bites of food, and went to contact the technical support personnel of Unicom and learn from the front line.

After a while, the helicopter was maintained, loaded with supplies, and ready to take off again.

Before takeoff, the captain gave a final reprimand to all the staff:

"The two townships that I will go to in the evening are in Beitang, which is slightly richer than the places I went in the afternoon, not only agriculture, but also a little tourism, because it is relatively close to the provincial capital, and the transportation is also convenient, and there are many farmhouses. At that time, the probability of people in the collapsed house may be greater. Let's search carefully - if the base station over there hadn't been destroyed, we had to find a good place for the base station to run in and practice the process first, and we would have gone there first in the afternoon. ”

He was just as he was lecturing when there was a sudden noise outside the door of the room that had been temporarily used as a hangar, and several people broke through the blockade and rushed in.

"What are you doing? This is the station of the rescue team hired by YY Company! Outsiders are not allowed to enter, what are you doing?"

Gu Cheng's staff naturally scolded immediately. Jin Ping, the person in charge of the venue, was still a little annoyed that the doorman did not stop people, but when he saw that the person who blocked him looked innocent and the person who rushed in was still wearing a police uniform, the person in charge understood and did not blame his subordinates anymore.

"Comrade, I'm sorry, I'm Lin Gang, the deputy director of the Beitang XX Branch, and my son Lin Qiming is a junior college student at the XX College in North Sichuan