Chapter 96 The First Evidence
“Thank…thank you.”
Bai Yang and the other two stuttered as they thanked him. They were all stunned. Before they could say anything more, the waitress had already set the tableware, smiled slightly, and quickly retreated and disappeared.
Bai Yang finished the dinner without any trouble. After the evening self-study class, he went straight home to ask for accusations. He wanted to know what these people had said to the school, which made the teachers look at him with such eyes that he felt that he didn't have much time left. But when he got home, he found a group of people crowded in his bedroom and chatting happily. Bai Yang was shocked -
"Yes, yes, that's right, it's the Zifeng Building. It only takes five minutes to walk there."
"Wait a moment, we are looking at the map."
"Look! Lao Wang, can you find a shortcut nearby?"
"How fast can that big eyeball move? Let's see if we can estimate a safe range..."
Bai Yang pushed open the door: "What are you doing?"
The three old men turned their heads at the same time as if they were thieves, and from their expressions one would think that they had been caught in the act of conspiracy.
"Chatting with the little girl."
Dad was holding a microphone, and Wang Ning and Zhao Bowen were standing on either side of the chair, one holding a large map and the other holding a tablet computer.
"You've already contacted her?" Bai Yang was a little surprised. He glanced at the time. It was just eleven o'clock. "So early?"
"It's earlier than you think," Zhao Bowen said. "We were connected three hours ago."
"BG4MSR, my son is back from school, you guys chat from now on, OVER." Lao Bai happily gave up his seat and put his microphone on the table.
"This... isn't it only available after eleven? Why so early today? Three hours ago?" Bai Yang threw down his schoolbag and squeezed over. A girl's crisp voice rang out from the speaker of the Icom725 radio: "BG? BG4MXH? Are you back?"
"It's me. I just got back. OVER." Bai Yang held his microphone and replied, then turned to ask his father, "What's going on? It's obviously not time yet."
The experience of the past few months told them that this radio station could only connect to BG4MSR after 11 o'clock in the evening, not at other times. Bai Yang had experimented before. He specially picked a weekend and tried it at 9 am, 12 noon, 6 pm and 8 pm, but none of them worked.
Only communication after 11pm can be guaranteed to be successful.
"This is because we have made further progress in our understanding of it." Zhao Bowen pointed at the radio station, "We have found indirect evidence that the Black Moon is an important factor affecting trans-dimensional communication."
"What kind of evidence?"
"The evidence is the frequency." Zhao Bowen replied, "This was originally just a guess. During the time when we took this Crane 25 out for inspection, the team had several guesses about the cause of the cross-time and space communication. Today we successfully verified one of them -"
"I just can't stand your beating around the bush." Dad complained, "Can you get to the point?"
"I have to explain the whole story, right?" Zhao Bowen rolled his eyes. "If you can, tell me."
"That's what I'm talking about!" Dad snorted, "Actually the reason is very simple. The reason we were able to contact BG4MSR in advance was because it was already there."
Bai Yang didn't understand what this meant.
"Yes, you can actually access BG4MSR at 7pm, all the time." Zhao Bowen interjected, "You don't have to wait until after 11pm."
"But I tried it." Bai Yang was surprised, "It doesn't work at all!"
"Because your frequency is wrong." said Dad.
"14.255Mhz." Bai Yang said.
"At 7 or 8 p.m., she's not on 14.255Mhz," Dad said. "That's the key."
Bai Yang was confused.
"Where is she then?"
"About 14.305Mhz," Dad replied. "We found this out through testing."
Bai Yang didn't believe it, so he decided to hold the microphone and ask directly: "BG4MSR, BG4MSR, let me ask you a question, do you adjust your radio frequency at night? OVER."
"FM?" the girl said, "No, I've always been on 14.255Mhz."
"Listen, she said she hasn't adjusted the frequency." Bai Yang leaned back in his chair.
"Of course she didn't adjust the frequency, but the frequency change is not necessarily man-made." Zhao Bowen explained, "You know Doppler radar, right? The target's flight speed is calculated based on the frequency change of radar waves. This principle is also often used in amateur radio activities."
"Attack the satellite." Bai Zhen said.
The so-called hitting satellites is a very 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. The satellite responsible for relaying amateur radio signals is called an amateur satellite - such as 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 amateur radio movement). Anyone can make long-distance calls 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 by at a very fast speed - once there is a relative speed, the Doppler effect of electromagnetic waves is an influencing factor that cannot be ignored.
When a satellite enters the country, the distance is rapidly decreasing, so the electromagnetic waves are compressed and the frequency increases. When a satellite leaves the country, the distance is increasing, so the electromagnetic waves are stretched and the frequency decreases. This principle is exactly the same as standing in a train station and listening to the changes in the whistling sound of a train entering the station.
Therefore, when the HAM is hitting a satellite, it must adjust its transmit and receive frequencies according to the satellite's position. This is called Doppler shift.
"I know that."
Bai Yang certainly knew what the Doppler effect was, but he and BG4MSR were not communicating via satellite, so why would they be affected by the Doppler effect?
"Don't worry, just listen to us." Zhao Bowen said, "Based on the current experiments, we can get a preliminary conclusion. After about 6:30, we can vaguely capture a little signal. After 7:00, the signal is clear enough for normal communication. At that time, the frequency is 14.305Mhz, which is much higher than 14.255Mhz. Why is this?"
Bai Yang thought about it.
"Because something is coming in?"
"In the second half of the night, after 2 a.m., the best communication frequency will drop to 14.235Mhz. Why is this?"
Bai Yang thought about it.
"Because what's leaving the country?"
"What exactly is entering and leaving the country?" Zhao Bowen asked, "Think about this time point, what would appear at 6:30 p.m.? And stabilize at midnight? And start to move farther away after midnight?"
Bai Yang slapped his head.
"Black Moon."
"Yes, this is the indirect evidence we found. The change in the radio frequency is consistent with the change in the position of the Black Moon. The Black Moon must be an important factor affecting the trans-time and space communication. This is the first strong evidence we found." Zhao Bowen said, "The frequency changes at a speed of about 10Khz per hour. This frequency change is not small, so you can't contact BG4MSR before 11 o'clock. She is not within your reception range at that time."
Bai Yang understood.
He couldn't contact BG4MSR during the day because the black moon was not in the sky.
He couldn't contact BG4MSR before eleven o'clock because the frequency was not correct.
The bandwidth occupied by sending messages in SSB mode is very narrow (note that sending any information will occupy bandwidth. If a radio station sends messages at a frequency of 15.000Mhz, it actually occupies a frequency range with 15.000Mhz as the midpoint, rather than a single point of 15.000Mhz). Generally speaking, among all types of radio modulation methods, FM occupies the most bandwidth. FM is larger than AM, which is larger than SSB, which is larger than CW. CW is for sending telegrams, and it occupies the smallest bandwidth, but CW can only make ticking sounds. The advantage of SSB is that you can use it to talk directly and the occupied frequency band is very narrow. The SSB mode used by Bai Yang occupies a bandwidth of about 20Khz, and its transmission and reception are mainly concentrated in the narrow range of 14.255Mhz to 14.275Mhz. Once the other party's signal leaves this range, he cannot receive it.
Taking 14.255Mhz at midnight as the 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. At 7pm, the frequency of BG4MSR is 14.305Mhz, at 8pm, the frequency of BG4MSR is 14.295Mhz, and at 9pm, the frequency of BG4MSR is 14.285Mhz. It is not until 10pm that it begins to enter the receivable range of Baiyang.
This was the first time that Zhao Bowen and others confirmed that the Black Moon had an important impact on trans-temporal and spatial communications.
"We have always speculated that the black moon was the cause of the trans-dimensional communication, but today we have finally confirmed it." Zhao Bowen continued, "We asked BG4MSR to cooperate with the experiment and go online at 7 o'clock tonight to test the frequency change. Guess what? Our guess turned out to be correct."
"Why does it have this effect?" Bai Yang didn't understand. "The Black Moon isn't a relay. The signal wasn't sent to the Black Moon, so why would it cause a Doppler effect?"
"Yes, you didn't use directional antennas. You still have to use Yagi to hit satellites. The Black Moon is not a relay. This Doppler effect is not caused by the Black Moon's moving speed." Zhao Bowen nodded, "So we further speculate that its influence is at a deeper level. This conjecture is very bold... It was not proposed by me. I'm not that wild. It was a comrade from the Institute of Physics. He said that time and space are inseparable. Since the Black Moon affects time, we can't expect space to be unaffected. The Doppler effect of the radio signal is just an external manifestation of the Black Moon's influence on space..."
"What's changing is not the frequency of the radio waves, but the space in which the radio waves are located." Zhao Bowen paused, "The Black Moon may be pulling and compressing space on a large scale."
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(Author's aside: I am one year older today.)
(End of this chapter)
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