All members of the leadership team of Operation Dongfanghong are here today. This is the first time since the plan was launched to this day that all members are here. The deputy team leaders left their posts to gather at the headquarters to witness history. Starting at 4 p.m.

People kept coming to the door. Bai Yang didn't know any of them, but they all came to shake hands with Bai Yang.

Zhao Bowen and Wang Ning introduced him. Bai Yang was so confused that he only remembered a bunch of titles, which all sounded very important. Uncle Zhao introduced that this is a certain professor, this is a certain director, and this is a certain director.

Wang Ning introduced that this is the deputy department level, this is the deputy department level, and this is the main department level.

A certain director told Bai Yang that although we met for the first time, we had worked together for a long time. Bai Yang was frightened and thought that he and the director had become colleagues out of nowhere.

Bai Zhen held his watch and waited.

He is timing, both now and twenty years from now. At seven o'clock tonight, the action will officially begin.

The coffee table and dining table are covered with laptops. Cables are dragged out from the room. There are messy wires on the floor. You need to pay attention when walking. Various strange peripherals are flashing red or green lights. The white curtain is supported on

Beside the wall, the projector is turned on. The headquarters finally looks like a joint operations command center. The only flaw is the lighting effect. Bai Zhen said that some blue cold light should be added, so that it looks like the CIC of the Arleigh Burke-class destroyer.

.

"Miss, are everything ready?" Bai Yang held his hand, "OVER."

"Ready."

Banxia also held her hand. As of today, she has completed all the preparations. The Baofeng UV9R handheld station is tied to the Yagi antenna and supported on the roof. The Celeron 3150 industrial control motherboard is connected to the camera, and the monitor and keyboard are hung on the wall.

, these are two sets of peripheral systems, which can be switched through the hand microphone socket of I725. When Banxia connects the I725 to the audio output port of the handheld station, the satellite data transmission system is connected, and when Banxia connects the I725 to the industrial control

When the motherboard is connected, the image data transmission system is connected.

Because the I725 has only one microphone jack, the two sets of peripherals cannot be connected at the same time and can only be used switched.

Both systems will be tested tonight. The first is to test whether the reconnaissance satellite and the relay satellite have successfully entered orbit and work normally. The second is to test whether the image transmission link can transmit pictures or videos.

If Humha-2 will successfully enter orbit, Bai Yang and others will be able to obtain the first telemetry image of Nanjing in twenty years.

If the image transmission link is successfully established, Baiyang can really see BG4MSR, and the latter can really see Baiyang.

Banxia also holds a pocket watch in her hand. The current time is 6:45 pm.

"BG, how many photos have you prepared?"

"I took hundreds of photos, and I was so exhausted this afternoon that my legs were broken. I am definitely the number one in the number of steps in WeChat Moments today. Among the hundreds of photos, we carefully selected 20 photos.

, I will send it to you later." Bai Yang said, "Anyway, the data link has been set up, just tell us what you want to see, and we will take pictures for you, OVER."

"Are there any photos of you?" the girl asked, "Yours, Uncle Zhao, Dad, Uncle Wang, and everyone else's."

Bai Yang was stunned for a moment.

"It's easy. Let's take a photo now..." He put down his microphone, "Uncle Zhao! She said she wanted a photo of all of us!"

Zhao Bowen was adjusting the projector and checking the router. When he heard Bai Yang's voice, he stopped what he was doing, raised his hands and clapped his hands: "Comrades, guys, please put your work aside for a while. Let's take a photo together."

!”

Forsythia took out her mobile phone: "I'll take pictures for you!"

So everyone crowded together, with their backs against a curtain and a huge map of Nanjing City. Bai Yang stood in the middle, with his father on the left, Lao Wang and Lao Zhao on the right, and other members of the Dongfanghong leadership group. There were eight or nine people in total.

Qiao was in charge of taking pictures. She raised her phone, took a few steps back, and captured the people, messy files, computers, tables, chairs, and sofas all around her.

"Get ready, smile and call Eggplant!"

With the crisp sound of the shutter, time froze, leaving here the only group photo in the whole story.

·

·

·

At seven o'clock that evening.

Banxia took a deep breath, took off the coin from around her neck, and tossed it again. It turned out to be heads.

"BG4MXH, BG4MXH, start cutting off the voice call now."

"BG4MSR, this is BG4MXH, confirm to cut off the voice call, OVER."

Banxia took off her earphones, unplugged the I725's hand microphone, and freed up the hand microphone socket. From now on, she could no longer talk to the other party. Instead, it was replaced by the audio output line of the mobile phone. She carefully inserted the audio output line into her hand.

In the microphone jack, one end of this black cable is connected to the 725 radio station, and the other end is connected to the hand station on the roof.

The handset is tied to the Yagi antenna and is used to receive signals sent back by the relay satellite.

The plan for the first test is as follows:

The reconnaissance satellite is operating in low orbit, turning on the synthetic aperture radar when passing over Nanjing City, and conducting telemetry scanning from Qinhuai District to Xuanwu District. The scanning method is strip imaging. This SAR telemetry satellite carries a one meter wide and ten meter long

The scanning range of the folded radar antenna is a huge rectangle five kilometers wide and twenty kilometers long.

After the strip scanning is completed, it will change to the spotlight imaging mode, locally enlarge a specific area in this huge strip of one hundred square kilometers, and take a photo with a higher resolution, and this photo,

It will be the first picture sent back to the present day from the end of the world.

The relay star plays the role of a data bridge. The reconnaissance star will send all data back to the relay star, which will store and modulate the signal.

The relay satellite then sends the modulated signal back to the ground, where it is received by the Yagi antenna on the Banxia roof.

After being received by the Yagi antenna, it is transmitted to the 725 amateur radio station, and the 725 radio station transmits the data back to modern times.

The signal transmitted back in 2019 will be backed up and stored by multiple parties, and decoded at the same time. If the decoding is successful and a clearly identifiable photo is obtained, then the test is successful.

And what photos will be taken for testing?

Everyone knew it tacitly and unanimously chose No. 66 Alfalfa Street, Qinhuai District.

Plum Blossom Villa.

The first picture sent back twenty years later, the picture used to test the entire system, is the ultra-high-altitude aerial view of Meihua Villa during the doomsday period.

Bai Zhen's palms were sweating.

Zhao Bowen was also sweating.

Everyone present was nervous, as if waiting for the news of the landing of the Mars lander. The lander was in a state of loss of contact before landing. It had to survive its death for five minutes without supervision. The operation control hall at that time

It is exactly the same as the current headquarters. No one knows whether it can succeed. It can even be said that the chance of success is actually slim. If there are so many links, if one link goes wrong, everything will be lost.

Fetching water from a bamboo basket is in vain, not only wasting so much manpower and material resources, but also consuming the most precious time.

There was silence in the headquarters, a dead silence.

"Is there a satellite signal?" Wang Ning asked in a low voice.

Zhao Bowen sat on the sofa, wearing headphones and staring at the computer screen. In fact, it is easy to judge whether there is a satellite signal or not, just by listening for noise. The relay satellite modulates the image data into audio and transmits it, which sounds pleasant to the human ear.

A sizzling noise.

"Is there a satellite signal?" Wang Ning asked again.

"Yes!" Bai Zhen suddenly said, holding his earphones tightly, "There is sound!"

Everyone present was shocked.

"Is that done?" Wang Ning was surprised.

"Don't be too happy. There is yes... but it's very weak. Maybe the antenna direction is misaligned. Look at the signal, it looks like it's about to die." Zhao Bowen frowned and pointed to the jumping line on the oscilloscope.

, "Yang Yang! When is the next voice call we agreed on?"

"ten minutes!"

"The next time she makes a voice call, ask her to slightly adjust the direction of the antenna! Just fine-tune it!"

In the second voice communication, Bai Yang guided Banxia to fine-tune the direction of the Yagi antenna, but no one knew which direction to adjust it in, so Banxia could only rely on intuition to tilt left and right.

After the adjustment, the signal was completely gone, and Bai Yang knew she had turned in the wrong direction.

The headquarters had no choice but to sit and wait for ten minutes. During the third voice call, they asked her to change direction.

This behavior is no different from knocking on the TV. If the TV is broken, knock hard. If the left side fails, knock on the right side. There is always one side that can knock well. This adjustment of Banxia worked.

"Yes!"

"Yes, yes, yes... I have a picture!"

"There's a picture!"

The image on the computer screen is slowly being drawn out. This is a test picture and the first photo taken after the reconnaissance satellite entered orbit. If it can be completely drawn out, it proves that Humha II will be able to operate normally, so Operation Dongfanghong

Success was declared in the first stage. Zhao Bowen's breathing was obviously rapid. He bent over and put his hands on the coffee table, clenching his two fists tightly.

This effect is very similar to opening a computer webpage during the dial-up Internet era and pulling down the pictures bit by bit.

What appeared in front of everyone was a black and white photo, with snowflake noise all over the screen. The image quality was quite poor, but people could still see that what the satellite captured was a small square that was a roof, evenly distributed like chess pieces among the lush vegetation.

, the layout of the residential building is familiar to them, this is Plum Blossom Villa, half of the Plum Blossom Villa community, Bai Yang sat in the room, staring at the images on the screen for a long time, speechless.

Everyone knows that she lives twenty years later, but this is the first time they have truly seen the destroyed world.

"Oh my God."

I don't know who is exclaiming in low voice.

"Look." Wang Ning suddenly became excited, "Look there!"

Zhao Bowen moved his gaze in the direction pointed by Wang Ning and was stunned for a moment. His eyes behind his tortoiseshell-rimmed glasses were widened. Zhao's brows had been furrowed for a long time, but now his frown suddenly relaxed.

He didn't know what expression to use, but he could only smile uncontrollably.

Everyone in the headquarters was stunned. Wang Ning was also laughing, but his eyes were red as he smiled.

"She's talking to us." Bai Zhen said.

At this moment, in various agencies, departments and headquarters, everyone who is looking at this photo has noticed that

That's a small greeting.

A little "Hi".

In an inconspicuous corner of the photo, on a lawn of Plum Blossom Villa, the word is spelled out with stones, bricks and concrete. The resolution of the synthetic aperture radar beam imaging mode can be up to one meter. The resolution is

The word on the one-meter photo is less than one centimeter long, and its actual area should be dozens of square meters. Everyone knows who left it, but the girl has never mentioned it to anyone.

At some point, she quietly used bricks and stones to spell out a huge word on the ground.

There has never been such a moment that Zhao Bowen, Bai Zhen, Wang Ning and everyone can feel that the girl is still alive, she is alive, she can jump and run around, she is living in the radio signal,

Also living under the satellite lens, you seem to be able to hear her voice.

In the satellite telemetry images, she silently shouted to the world twenty years ago:

Hi!

·

·

·

The first satellite data transmission test was declared successful.

Humphrey II will successfully enter orbit by overcoming many difficulties with invincible luck. This is simply the third milestone in the history of human spaceflight after Yuri Gagarin entered space for the first time and Neil Armstrong landed on the moon for the first time.

It was the first successful orbit after the destruction of mankind. The comrades in the leadership team of Operation Dongfanghong excitedly went downstairs to celebrate and drink, arm in arm. They all said that drinking is not allowed during work, but this time they made an exception.

The first test lasted for half an hour. The relay satellite transmitted about 60M of data to the ground station. The original image data scanned by the synthetic aperture radar of the reconnaissance satellite was extremely large. It was unrealistic to transmit all of it.

Therefore, at the level of the relay satellite, screening, compression and modulation are required. Compressibility will lead to a large amount of information loss. Data quality and transmission efficiency cannot be had at the same time. There is no way, the satellite signal transmission speed is only so fast.

Lossy compression can only be recognized by pinching the nose, and the final image decoding and restoration relies on the algorithm of the computer group.

The computer team stated that they have the ability to restore blurry images with high definition. When training the algorithm, they turned all the cavalry films on the market into infantry films.

Banxia set up the camera, adjusted the direction of the lens, and pointed it at the desk and window.

The satellite communication test was successful, and the second test was next. After hard work for so long, the PSK signal modulation data transmission link that was worked so hard was finally put to use.

She was finally about to see the person opposite.

The two sides have been communicating via amateur radio for three or four months, and tonight the first video transmission will be made.

"BG, BG, you or me first?"

"You first!"

"Okay, then I'll go first!"

Of course, I725 is a damn half-duplex radio station. Real-time chatting like WeChat video calls is not possible. Data can only be transmitted in one direction. Either Pinellia will watch Baiyang's performance, or Baiyang will watch Pinellia's performance.

So the two parties agreed that each video transmission would last for five minutes, five minutes for Pinellia ternata, five minutes for Bai Yang, another five minutes for Pinellia ternata, and another five minutes for Bai Yang. The image data transmission link could not transmit sound, but could only transmit images. Both parties used pens.

Write and communicate on cardboard.

Using a flashlight, Banxia unplugged the audio transmission cable from the Yagi Antenna UV9R handheld station in the dark and replaced it with the audio transmission cable from the Celeron 3150 industrial control motherboard. The two sets of peripherals were seamlessly switched.

She decided to send the video to the other party first and perform a backflip before appearing on camera.

However, I didn’t dare to turn on the lights this late at night. The room was dark and no one could see the somersault after the performance. After thinking about it, Banxia gave up the idea.

On the other end, Bai Yang was a little nervous.

"This is a female netizen meeting." Forsythia was a little embarrassed, "What if she doesn't look good?"

"Go, go, Comrade Counselor, we are facing a formidable enemy, and we must put the overall situation first." Bai Yang said righteously, "Don't say that we have these things."

But he said that, but when it came time to meet, he was the most nervous person in the headquarters.

"Why are you nervous?" Dad was immersed in debugging the software. "Aren't you already very familiar with her?"

"Old Bai, you don't understand. We used to make phone calls, but now we finally have to meet. How can it be the same?" Wang Ning was tightening the fixing nut on the tripod. "You are half buried in the earth, how can you understand the young people in adolescence?"

psychology..."

"You're only half buried in the ground."

It was a quarter past eight that night.

The software debugging is completed and the signal is connected.

Bai Yang sat upright on the sofa in front of the coffee table. He knew that the other party couldn't see him, but he still couldn't help but comb his hair quietly, button up his collar, and manage his expression.

It's not like I'm going to meet a female netizen, but I'm about to have some business negotiations.

Behind him was a large group of people, including Father Wang, Lao Zhao, and Lianqiao, who poked their heads out from behind Bai Yang's shoulders.

They are also curious.

I want to know what this girl who lives alone in the apocalyptic world looks like.

However, there was a video playback window on the computer screen, which was completely dark.

"Why is it still black?" Wang Ning asked, "What went wrong?"

"There is no problem, the signal is connected, the lines are all fine..." Dad checked the interface of the laptop and plugged in the plug firmly, "At least there is no problem here, it may be her... Hehehehehe

Hey! It’s moving! It’s moving! There’s light, there’s light!”

The dark video playback window suddenly lit up, as if the light of a flashlight hit the camera, and the people sitting in front of the computer suddenly became excited.

"It's alive! It's alive!" Wang Ning was overjoyed.

"Old Wang, what nonsense are you talking about? Of course it is alive." Bai Zhen said.

At this time, they all understood that the darkness in the video was just because the lights were not turned on in the other party's room. It was not a problem with the wiring. The video transmission was successful.

The girl was still adjusting the lens of the camera. People in the headquarters could only see a flashlight swinging around. Occasionally a hand appeared in the light beam. The hand was twisting around on the camera, and its wrist was in the dark.

The background is dazzlingly white.

Bai Yang looked at that hand and wondered what kind of person she would be. A boy of seventeen or eighteen years old was at this stage. Showing him only one hand would make him think of the other person's whole face. Bai Yang didn't think so.

He had imagined the girl's appearance, but his fantasy was just a fantasy. Now that he was about to see her for real, he felt nervous for no reason.

"Why doesn't she show her face?" Wang Ning said.

"Why are you so anxious? She is still adjusting the camera."

Zhao Bowen leaned on the sofa and adjusted his glasses. The image played in the video window was still shaking. The other party was indeed adjusting the camera. In the extremely dim light, they could vaguely distinguish some things, such as a flash in the flashlight beam.

The desk passing by and the curtains above the desk clearly indicate that this is in the room.

"When she adjusts, she will be able to..."

The mobile phone in Zhao Bowen's pocket suddenly rang.

Before he could answer the phone, within four or five seconds, the mobile phones in Bai Zhen's and Wang Ning's pockets also rang, and all the communication tools in the command center rang rapidly.

"Hey, it's me, what...what did you say?"

Zhao Bowen's expression suddenly changed.

He walked around the sofa, leaned on the coffee table and turned on the computer. The second photo that the computer team had decoded and restored was sent over. It was still the Plum Blossom Villa, but it was the other half of the community that was not included in the first photo. Bai Zhenwang

Ning and others also came over, and after just one glance, their expressions suddenly changed.

"Fuck."

"This... this damn..."

A huge, black, fuzzy spider was lying on the roof of a residential building. Its limbs were extremely long. It was lying on the roof of this building, and its long legs could climb on the outer wall of the next building.

Bai Yang poked his father.

Bai Zhen turned his head and saw his son's face turning pale.

Bai Yang pointed to the computer screen.

The video playback window was glowing with red light, and the room that was originally too dark to be visible was slightly illuminated. Through the curtains, the person on the other end of the computer could see a large, glowing, blinking red eyeball panning over and appearing.

Outside the window, stop, and then slowly get closer, so close that you can't see the whole eyeball through the entire window. The bedroom is like being directly illuminated by a huge red laser pointer from the window.

What the satellite captured were just static photos, but a real-time live broadcast was going on on the computer. Bai Yang stared straight at the screen, his body so stiff that he couldn't move. He was actually looking face to face with his big eyes.

Even after twenty years, the people in the headquarters were oppressed to the point where they couldn't breathe.

Banxia held her breath, hugged Uncle Huang tightly, and huddled under the desk.

She was not adjusting the camera just now, but driving away Uncle Huang. Uncle Huang sneaked into the room at some point and was spinning wildly at her feet. When Banxia bent down to grab it, she saw the glass lens of the camera facing the window.

When the red light reflected, she didn't have time to think too much. She grabbed Uncle Huang and immediately rolled him under the table. She leaned against the wall, not daring to move or make a sound.

The red light outside the window became more and more intense, so intense that it could illuminate the bedroom even through the curtains. Soon Banxia heard a "click, click, click, click" sound, which was the big eyes crawling on the outer wall of the building.

.

Bai Yang at the other end of the video can only see images but cannot hear sounds. If he can hear sounds, then he will have a deeper understanding of the horror of big eyes. Banxia hid in the darkness and shivered, closing his eyes and burying his head.

In Uncle Huang's warm and soft fur, she heard the thin, playful, woman-like voice again. It was outside the window, separated from her by a wall:

"Come out, where are you? Where are you?"
Chapter completed!