For the field of satellite remote sensing, all kinds of blockbuster movies often instill an illusion in the audience, it only takes a few seconds to lock on a target on the ground, continue to zoom in and even see whether the target teeth are stained with leek leaves, or it only takes a short time to search for any weapons and equipment you want to search, the license plate number can always be presented at the most suitable angle, the level of detail is outrageous, and it will not be misjudged at all because of the cover of rain and fog or the appearance of buildings, human bodies, and vehicles, in short, All kinds of tall and great.

Reality is always a certain gap than works of art, any ground photos and videos taken from a top-down perspective from high altitude or even the earth's outer orbit, the actual resolution may reach ten centimeters or even lower, but that needs to be specially designated a certain place or follow an object to adjust the specific focal length, needless to say, the time required for satellite orbit transfer, as for the wide-angle photos and videos, the resolution can reach 30 centimeters is already quite high-end, want to analyze reliable intelligence from it, in addition to computer-aided analysis, It is still necessary to manually find the suspicious points little by little, and the slightest sloppiness may miss important information.

In other words, if the computer-aided analysis was really so clever, a missing civil airliner would not have mobilized netizens from all over the world to help analyze the satellite photos at that time, and after searching for more than a thousand days, they still couldn't find it.

Yang Xiaohua wants to provide Wang Chen with help, it is based on the photos and video records taken by satellites, the existing conditions for finding Wang Yefei are actually much stronger than the missing passenger plane, Yang Xiaohua knows the accurate location of the need for comparative analysis of the data, and also knows the approximate time when Wang Yefei hid home, and also has the authority to mobilize cloud computing to analyze data. Moreover, since the outbreak of the epidemic in the Harbin epidemic area, there is indeed a satellite orbiting for a long time in the sky over Harbin to collect ** data and assist rescue work, until the PLA completely evacuates Changchun, and there is no longer a helicopter to Harbin to carry out specific rescue missions, this satellite is transferred to other uses, the only problem is that if Wang Yefei left home after the satellite orbit transfer, or he left at night, relying on the existing satellite data, it is also impossible to analyze his whereabouts.

In any case, this method of finding is better than Wang Chen having no clue.

Cloud computing analysis also takes time, Yang Xiaohua suggested that Wang Chen and Sheng Qingru take a break and wait for the results, or look around to see if there are any new discoveries, Wang Chen understands what Yang Xiaohua's subtext is, and he doesn't want to wait for this, so he simply carried his mother's body to the landscape garden in front of the residential building with the help of Sheng Qingru. Deal with it', and then, Wang Chen knelt in front of the body, knocked his head nine times, and personally lit the withered yellow bushes under his mother.

The fire burns brightly.

In the jumping firelight, the smile of his mother, the smell of his body, the gentle hands, and the voice of scolding himself flashed in Wang Chen's mind one by one, and unconsciously, Wang Chen burst into tears again, and he had almost more tears in the past half a day than in the past ten years combined.

The son wants to raise but does not wait for the parent......

"Actually...... In a sense...... Auntie, luckier than many people......" Sheng Qingru didn't know what to say, and comforted her.

Wang Chen didn't reply, just patted Sheng Qingru's hand understandingly, looked at the other party's cheeks that were blown red by the cold wind, and nodded lightly.

The deceased must always look forward.

The black smoke produced by the burning of a large amount of gasoline quickly dispersed because of the cold wind, the ignition point of gasoline was quite high, and there was no problem in burning the corpses, and when the flames gradually went out, the cold wind of nearly thirty degrees below zero made the bones cool down quickly, Wang Chen and Sheng Qingru stepped forward, picked up the remaining bones and packed them, Yang Xiaohua's voice sounded at the right time......

"What?! My dad was taken away?! ”

"Well, I found the video recording, but the resolution is only 0.7 meters, and after sharpening, I can only barely see a person being put out of the unit door by another group, and from this person's movements, it can be roughly inferred that his leg may be broken, or he is in a coma, and the time is the forty-second day after you were separated from your father."

Forty-two days? At that time, Harbin was far from freezing, and there should be a lot of zombies, who took such a big risk to run into the residential area and take away my father? How do they know where their dad is? Where did you take your dad to?

Before Wang Chen could ask these questions, Yang Xiaohua, who was the communication support, had already prepared the answers in advance, and continued: "Confirm that your father may be alive, I immediately called up Harbin's radio and multi-spectrum remote sensing data, and carefully analyzed and found that Harbin has been active several radio signals during that time, because it is a short-wave signal, the propagation range is quite limited, so the signal received by the satellite is very weak, after simple positioning, I found that your father should use a car handset to communicate with the outside world, I guess that's where his position is exposed. ”

Wang Chen knew that Yang Xiaohua's judgment was correct, there were several car batteries and a car multimedia system in the room where his father lived at the end, and that thing could also be used as a handset, "Can you find the location of the other party?" ”

"This ...... Hard...... Although the civilian equipment used by the other party is not encrypted, the power is also weak, and the data recorded by the satellite can only confirm the existence of such a radio transmission and reception source, and even can only judge that it is a peak signal, but there is no way to record the specific content, but one thing I am sure of is that from the sharpened picture, the car driven by the other party is an off-road vehicle, and the military and police are painted. ”

Sport utility vehicle? Armed police livery? Wang Chen's first thought was what Wu Hao said, he said that he had been deceived by the fake armed police and almost died, but these words should have been made up by himself to deceive people, right? Careful scrutiny is really untenable, at that time, Harbin was full of zombies, even if it was a fake armed police, if there was a chance, they should run south, how could they linger in the center of the epidemic area? Could it be that this grandson's words are mixed truths and falsehoods? Nine true and one false? He once witnessed the murder of fake armed police? It was these people who took away their father?

Then again, the group of cult-believing madmen who had been operating around to spread the virus and promote the end of the world had made it their mission to wander around the center of the epidemic area for another purpose.

"Can you judge the range of activity of the signal source, I want to go to the place where the signal source appears most densely."

"It's not difficult, I'm not good at programming a simple database, give me half an hour to arrange someone to get it done, and I can summarize all the information into a set of retrieval system for you...... However, should this matter be reported to Professor Tu? In any case, he is also the leader of the team. ”

"This ...... I'll just tell him. ”

"Okay, I'll turn you around now."

Suddenly, a metallic voice appeared in the communication channel, "I'm Tu Hongye." ”