Hawking's concerns are not unreasonable.

When launching ballistic missiles underwater, the submarine is generally 30 meters underwater and sailing at a speed of about 2 knots. The missile is placed in the launch tube. The launch tube is installed vertically in the middle of the submarine. Some are inside the pressure hull, and some are inside the pressure hull.

It is located between the pressure-resistant shell and the non-pressure-resistant shell. Generally, each boat carries 12 to 24 missiles.

At a water depth of 30 meters, the outside of the launch tube cover is subject to a water pressure of about 3 atmospheres. Therefore, it is very laborious to open the tube cover. You must first use high-pressure gas to pressurize the inside of the tube so that the pressure inside and outside the tube is roughly equal.

Open the lid easily.

In order to prevent a large amount of seawater from pouring into the missile launch tube when the cover is opened, a watertight diaphragm is specially installed on the mouth of the tube.

When launching, the upper cover of the missile launch tube is opened. Since the launch tube is a watertight and airtight structure, and has been inflated and filled with a small amount of sea water, the pressure is equal to that of the sea water. There is no pressure difference, and sea water cannot enter.

The gas will not escape the water surface.

After receiving the launch command, the electric detonator detonates and ignites the gas generator, causing the high-temperature and high-pressure gas to be sprayed from the bottom of the launch tube into the tube. Driven by the reaction force, the missile will penetrate the watertight diaphragm and push straight upward out of the tube.

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After the missile comes out of the barrel, it soars straight into the sky with the boost of the first-stage rocket. After flying for about twenty or thirty kilometers, the second-stage rocket performs a relay boost and then pushes the missile into outer space. After flying according to the predetermined trajectory

, re-enter the atmosphere and attack the target.

A missile weighing more than ten tons will cause at least two effects after leaving the boat: first, the stability of the submarine will be damaged. At this time, seawater must be immediately poured into the launch tube to make up for part of the missile weight; at the same time, the submarine's equalization water tank will also be pumped to ensure

Compensate for equilibrium and maintain stability.

The second is that the recoil at the moment of launch often causes the submarine to sink slightly. For example, the USS George Washington sank 4 meters when it launched the first Polaris A1 missile, but this is not dangerous to the submarine.

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Initially, the United States used the ignition method after emerging from the water to launch submarine-launched ballistic missiles, that is, the first-stage rocket began to ignite when the missile flew 15 to 25 meters above the water.

Later, it was changed to underwater ignition, that is, after the missile is launched from the boat, it is ignited at a safe distance. This can ensure that the missile has a huge vertical upward thrust when it comes out of the water and will not be affected by the complex wind and waves on the water surface.

During this period, the biggest danger comes from the safety of the ballistic missile itself. If it explodes by itself, the entire nuclear submarine will be destroyed. In addition, the shock wave of the ballistic missile can easily cause the nuclear submarine to sink or tip over.

Fortunately, Hawking is very confident. The nuclear submarines of the United States have been tested for a long time. Although this nuclear submarine was hit by a tsunami in the end of the world, after careful inspection, there are no major flaws in the nuclear submarine.

"Oh, mygod! I hope this launch goes well!" Hawking couldn't help but pray in a low voice.

The three nuclear warheads were unloaded. The nuclear warhead that leaked slightly was put into a huge lead barrel, transported by a tugboat to the vicinity of the Mariana Trench in the Pacific Ocean, and thrown into the sea. The 10,000-meter trench will become the nuclear warhead.

The cemetery of nuclear warheads. As for the harm caused by nuclear leakage, Li Baoqiang and others are not considering it.

The remaining two nuclear warheads were carefully transported away and stored in a location known only to a few people.

At 15:01 on December 12, in a certain water area in the East China Sea, the water was one hundred meters deep.

At a depth of thirty meters, the USS Ohio nuclear submarine is sailing at a low speed.

Ten minutes before launch, the entire crew of the boat entered the launch position.

Various mechanical and electronic equipment in the cabin are working nervously, and the lights on various display tables are constantly flashing. The "hissing" sound of inflation and exhaust is intertwined with the buzzing sound of electronic instruments, adding to the "before the war"

of tension.

"...5, 4, 3, 2, 1, launch!" Captain Hawking gave the order decisively.

The submarine trembled, and the rocket jumped out of the water, like a sea dragon breaking out of the water, splashing a fire on the water, then straight into the blue sky, piercing the sky, and flying out of the atmosphere...

During the entire launch process, the nuclear missile rocket flew through the underwater section, control section, and passive section, accurately sending the communication satellite into outer space two thousand kilometers away.

“Running fine!”

"Enter the atmosphere!"

"Damn, I can't see it!"

"The radar observation effect is good!"

On an observation ship not far away, scientific researchers are conducting visual, optical instrument and radar observations.

The current level of science and technology can only use these three methods to observe whether the rocket launch is normal.

Based on what we have seen so far, the ballistic rocket was launched successfully. As for whether it can reach the predetermined orbit in outer space, whether the satellite can be released, and whether the satellite can start working, everything is still unknown.

To verify whether the launch is successful and whether the satellite can work normally, at this stage, in the incomplete technological chain of the apocalypse, we can only rely on ground signal testing.

Because the working principle of the satellite communication system determines that this verification test can only be tested by such a method.

The satellite communication system consists of three parts: satellite terminal, ground terminal and user terminal.

The satellite acts as a relay station in the air, that is, it amplifies the electromagnetic waves sent by the ground station and then sends them back to another ground station. The satellite body includes two major subsystems: spaceborne equipment and satellite matrix.

The ground station is the interface between the satellite system and the ground public network. Ground users can also enter and exit the satellite system through the ground station to form a link. The ground station also includes the ground satellite control center, and its tracking, telemetry and command stations. The user terminal is each

A user terminal.

When the communication satellite enters the predetermined orbit, it automatically opens the solar panel according to the program to receive energy from the sun. The program inside the satellite automatically starts working to receive and forward signals from the ground.

At the same time, Shangguanyang in Nanjing started dialing a maritime satellite phone, while another maritime satellite phone in Kyoto was held by a researcher, nervously waiting for the call.

Shangguanyang began to dial another maritime satellite phone. The dialed signal was transmitted to the communication satellite in space. The communication satellite successfully received the signal and relayed it to the ground. The maritime satellite phone in the hands of researchers at the Kyoto Ground Station successfully rang.

, both parties called and greeted each other.

This call was successfully completed, and several consecutive tests were also successful. The sound was very clear and the effect was good.

In the remaining two months, the USS Ohio nuclear submarine made several trips to Zhoushan and launched two other communication satellites, both of which were successful.

At this point, in the sky of the northern hemisphere, three communication satellites, together with the ground control station in Kyoto, and two hundred handheld and vehicle-mounted maritime satellite phone personal terminals, formed the world's first satellite communication system since the end of the world.

Li Baoqiang is holding a maritime satellite phone developed by Wuhan Research Institute in his hand. It is such a bulky "big brother". He has successfully called his wives at home and exchanged some private whispers.

Li Baoqiang asked Shangguanyang whether such calls could be kept confidential. Shangguanyang spat at Li Baoqiang on the phone and said, "You have to pay attention. At least the staff at the ground control station can monitor your calls!"

Li Baoqiang took a breath of cold air: "Grandma, it seems that the convenience is better than the speed of the maritime satellite phone; the confidentiality is better, and the benefits of the radio station are better!"

After discussion with Commander Tao Zijun, this maritime satellite communication system was named "Huamei Communication System."

Because the success of this system embodies the efforts of science and technology and personnel from China and the United States.

The construction of the maritime satellite system is very busy. Although the scientific and technological chain has been incomplete since the end of the world, it was boldly started and it was successful.
Chapter completed!