We Live In Nanjing

  Chapter 96 The First Evidence

   "Thanks...Thank you."

  Baiyang stammered and thanked them all. They were all stunned. Before they had time to say anything, the waitress had set the tableware, smiled slightly, and quickly retreated and disappeared.

Bai Yang finished the supper without any risk, and went straight to home Xingshi to inquire about the crime after the evening of self-study. He wanted to know what the group had said to the school, which caused the teachers to look at his eyes and make him feel like he was time. Not much, but as soon as he got home, he found a group of people huddled in his bedroom and chatting happily, Bai Yang was taken aback—

   "Yes, yes, it's the Zifeng Building. It only takes five minutes to walk there."

  "Wait a moment, we are looking at the map."

   "Look for it! Pharaoh, are there any shortcuts nearby?"

  "How fast can the big eyeball move? Let's see if we can predict a safe range..."

   Bai Yang opened the door: "What are you doing?"

  The three old men turned their heads together like thieves, looking at their expressions, they thought they were breaking the scene of a plot.

   "Talking to the little girl."

  Daddy is holding his hand microphone, Wang Ning and Zhao Bowen are standing on both sides of the chairs, one holding a large map in one hand, and a tablet computer in the other.

  "Have you communicated with her?" Bai Yang was a little surprised. He glanced at the time. It was only eleven, "So early?"

   "It's earlier than you think." Zhao Bowen said, "We got through three hours ago."

   "BG4MSR, my son is back from school, and you guys will talk next, OVER." Lao Bai gave up his position happily and put his microphone on the table.

"This...isn’t it only accessible after eleven? Why is it so early today? Three hours ago?" Bai Yang threw down his schoolbag and squeezed over, and the girl’s clear voice sounded from the speaker of the Icom725 radio: "BG? BG4MXH? Are you back? Yet?"

   "It's me, I just came back, OVER." Bai Yang held down his hand and replied, then turned around and asked his father, "What's the matter? It's obviously not time yet?"

The experience of the past few months tells them that this radio station can only be connected to BG4MSR after 11 o’clock in the evening, and that it’s not possible at other times. Bai Yang hasn’t experimented without it. He specifically picked a weekend at 9 o’clock in the morning and 12 noon. I tried both at 6 pm and 8 pm, but none of them succeeded.

  Only connect after 11 o'clock in the evening to ensure success.

  "This is because our understanding of it has gone a step further." Zhao Bowen pointed to the radio station, "We found indirect evidence that the black moon is an important factor in the time-space communication."

   "What kind of evidence?"

"Evidence is frequency." Zhao Bowen replied, "This was originally just a speculation. During the period when we took this abduction machine for inspection, there were several conjectures within the team about the cause of the overtime communication. Today we successfully verified one of them—"

   "I can't understand your curvy virtue." Dad vomited, "Can you tell me the point?"

   "I have to explain the ins and outs clearly, right?" Zhao Bowen rolled his eyes, "You can tell if you have the ability."

  "I'll talk about it!" The old man snorted, "The reason is very simple. The reason why we can contact BG4MSR in advance is because it is there."

  Bai Yang didn’t understand what this meant.

   "Yes, in fact, you can connect to BG4MSR at 7 o'clock in the evening, and it's always possible." Zhao Bowen inserted, "You don't have to wait until after 11 o'clock in the evening."

   "But I tried it." Bai Yang was surprised, "It can't get through at all!"

   "Because your frequency is wrong." Dad said.

  "14.255Mhz." Bai Yang said.

   "At seven or eight o'clock in the evening, she was not on 14.255Mhz." Dad said, "This is the key."

  White Yang is stunned.

   "Where is she then?"

  "Probably 14.305Mhz." Dad replied, "We tried it out."

  Bai Yang didn’t believe him, he decided to hold his hand microphone and directly ask to understand: “BG4MSR, BG4MSR, I’ll ask you a question, will you adjust your radio frequency at night? OVER.”

  "FM?" The girl said, "No, I have always been 14.255Mhz."

   "Listen, she said she has not adjusted the frequency." The white poplar leaned back in the chair.

"Of course she hasn't adjusted the frequency, but the frequency change is not necessarily artificial." Zhao Bowen explained, "Do you know Doppler radar? According to the frequency change of the radar wave to measure the target's flight speed, this principle is used in amateurs. It is also often used in radio activities."

   "Hit the satellite." Bai Zhen said.

The so-called satellite hitting is a fairly common amateur radio activity. In addition to direct frequency communication, relay stations, and ionospheric reflection, HAMs can also rely on artificial satellites in orbit for amateur radio activities. This is responsible for relaying amateur radio activities. Satellites with radio signals are called amateur satellites—for example, the lilac series of satellites developed by Harbin Institute of Technology. Of course, the International Space Station is also an oversized amateur satellite (the International Space Station plays a very important role in the world's amateur radio movement). Anyone can Long-distance calls are made through amateur satellites, but it should be noted that amateur satellites are all low-orbit satellites. Unlike synchronous orbit satellites, low-orbit satellites will not remain relatively stationary with the ground. They will pass through the border at a rapid speed-once there is a relative Speed, then the Doppler effect of electromagnetic waves is an influencing factor that cannot be ignored.

When the satellite enters the country, the frequency of electromagnetic waves will increase due to the rapid shortening of the distance. When the satellite leaves the country and the distance is extended, the frequency of electromagnetic waves will decrease. The howling of the station changed exactly the same.

  So when HAM hits a satellite, it must adjust its own transceiver frequency according to the location of the satellite. This is called Doppler shift.

   "I know these."

  Bai Yang certainly knows what the Doppler effect is, but he and BG4MSR are not connected through satellite communication. Why are they affected by the Doppler effect?

"Don't worry, listen to us." Zhao Bowen said, "According to the current experiment, we can get a preliminary conclusion. After about half past six, we can vaguely catch a tiny bit of signal. After seven o'clock, , The signal is clear enough to make a normal call. At that time, the frequency was 14.305Mhz, which was much higher than 14.255Mhz. Why?"

   Bai Yang thought for a while.

   "Because something has entered the country?"

  "In the middle of the night, after two o'clock in the morning, the best communication frequency will drop to 14.235Mhz. Why is this?"

   Bai Yang thought for a while.

   "Because something is leaving the country?"

"What exactly is entering and leaving the country?" Zhao Bowen asked, "Do you think about this time, what will appear at 6:30 in the afternoon? It will stabilize at 12 midnight? It will start again after 12 o'clock. Longer distance?"

  Poplar patted his head.

   "Black Moon."

"Yes, this is the indirect evidence we found. The change in radio frequency is consistent with the change in the position of the black moon. The black moon must be an important factor in the time-space communication. This is the first strong evidence we found." Zhao Bowen said, "The rate of frequency change is almost 10Khz per hour. This frequency change is not small, so you can't contact BG4MSR before 11 o'clock. At that time, she was not within your receiving range."

  White Yang understands.

  He couldn't contact BG4MSR during the day because Heyue was not in the sky.

  He couldn't contact BG4MSR before 11 o'clock because the frequency was not matched.

The bandwidth occupied by sending in SSB mode is very narrow (note that sending any information will occupy bandwidth. If a radio station sends a signal on a frequency of 15.000Mhz, it actually occupies a frequency with 15.000Mhz as the midpoint, instead of 15.000Mhz One point) Generally speaking, FM takes the most bandwidth among various radio modulation methods. FM is greater than amplitude modulation and greater than SSB and greater than CW. CW is a telegraph, which occupies the smallest bandwidth, but CW can only tick and tick. The advantage of SSB is you It can be used to talk directly and the frequency band occupied by it is very narrow. The bandwidth occupied by Baiyang’s SSB mode is about 20Khz. His transmission and reception are mainly concentrated in the narrow range of 14.255Mhz to 14.275Mhz. Once the other party’s signal is out of this He could not receive the interval.

Taking the 14.255Mhz at midnight as a benchmark, and calculating at a frequency shift of 10Khz per hour, the frequency in the first half of the night will be higher than this number. The frequency of BG4MSR at 7 pm is 14.305Mhz, and the frequency of BG4MSR at 8 pm It is 14.295Mhz, the frequency of BG4MSR is 14.285Mhz at nine o'clock in the evening, and it does not start to enter the acceptable range of Baiyang until ten o'clock in the evening.

  This is the first time that Zhao Bowen and others have confirmed that the black moon has an important impact on the time-to-time communication.

"We have always speculated that the black moon is the cause of the hyper-spatial communication, but it is only confirmed today." Zhao Bowen continued, "We let BG4MSR cooperate with the experiment, and it will go online at 7 o'clock this evening. The test frequency changes. Guess what? We think Sure enough, it was correct."

  "Why does it have this effect?" Bai Yang didn't understand, "Black Moon is not a relay either. The signal is not sent to Black Moon. Why does it cause the Doppler effect?"

"Yes, none of you use directional antennas. You have to use Yagi to hit satellites. Black moon is not a relay. This Doppler effect is not caused by the speed of the black moon." Zhao Bowen nodded, "So We further speculate that its influence is at a deeper level. This conjecture is very bold...I did not propose it. I am not so wild. It is a comrade of the Institute of Physics. He said that time and space are inseparable. Since the black moon has affected Time, then we cannot expect space to be unaffected. The Doppler effect of the radio signal is only an external manifestation of the black moon’s influence on space..."

   "It is not the frequency of the radio waves that changes, but the space in which the radio waves are located." Zhao Bowen paused, "The black moon may stretch and compress the space on a large scale."

  ·

  ·

  ·

  (The author Jun's gossip: I'm one more year older today.)

  (End of this chapter)