A big country of aerospace with black technology

"ignition!"

As the countdown ended, Zhang Xingyang, who was in charge of the launch mission, issued an ignition command.

The operator presses the ignition button.

Four YF-21C rocket engines with a total thrust of nearly 300 tons at the bottom of the rocket began to work, and four boosters with YF-25 engines began to eject powerful flame jets at the same time.

A huge orange flame jet flowed along the diversion trough under the launch pad to the two sides of the launch site.

The white smoke gradually expanded as the rocket lifted off slowly, as if the white clouds in the sky were tied to the bottom of the rocket.

Shortly after the rocket took off, the tracking records of the rocket came from various ground monitoring stations.

"Xicheng, the optical tracking is normal!"

"Xiacheng, the radar tracking is normal!"

Various optical tracking observations and radar tracking observations were turned on at this time, aiming at the Changsanyi rocket that had just taken off and began to break through gravity.

Although the various optical detection methods and radar monitoring methods of this era are not as developed as those of later generations, the basic function of monitoring flight trajectory can still be realized.

Of course, it is still somewhat difficult to rely on these monitoring stations to detect various hypersonic missiles used by the military.

But at this time, even if it is Eagle Sauce, in fact, all kinds of hypersonic weapons are still in the stage of technological exploration, and it is not known that hypersonic weapons that can be really used will have to wait for decades.

By that time, the development of various domestic hypersonic weapons has long been completed, including but not limited to various land-based ground strike missiles and shipboard hypersonic anti-ship missiles.

As well as space-based bombing weapons that fly in space, and hypersonic weapons launched.

Zhang Xingyang thought that if he had time in the future, he could push the domestic radar industry forward.

At this time, Chang Sanyi had already flown over the Pacific Ocean and entered the monitoring range of the ocean-going observation ship.

"Yuance 6, the radar tracking is normal!"

At this time, everything is still normal, which basically means that the rocket test has been successful.

The next most critical time node is when the load is separated, and the first and second level separations are not particularly error-prone time nodes.

"The separation of the first stage rocket is normal!"

This is almost as expected by everyone, and there is nothing that may go wrong with the separation of the first stage rocket.

The most important thing to pay attention to now is the three-stage rocket, which is the fairing where the simulated load is placed.

After all, this launch is not quite the same as an ordinary test. Ordinary rocket launches usually have one arrow and one star, but this rocket launch is one arrow with two stars.

There are generally two forms of load release, one arrow with two stars or one arrow with multiple stars.

One situation is that different satellites occupy the same orbital altitude or a relatively similar orbital altitude. At this time, the satellites in the fairing are basically released at the same time.

Another situation is that the satellites carried by the rocket are operating at different orbital altitudes. At this time, the satellites are released in batches, that is, after the launch vehicle reaches the predetermined orbital altitude, the first satellite is released first. Then the rocket continues to fly upwards, and after reaching the orbit of the second satellite, the second satellite is released, and so on, until all the satellites are launched to the predetermined orbital altitude.

The two simulated satellites carried by the Changsanyi rocket this time are both in the same orbit. After all, this time is actually preparing for the launch of the "Iridium" next month.

The next Iridium launch will be two "Iridium" satellites in the same orbit.

Therefore, when the predetermined orbital altitude is reached, the two simulated satellites in the fairing will be released simultaneously.

"Secondary rocket separated successfully!"

The engineer brother who was in charge of monitoring the separation status of the rocket seriously reported the status of the Changsanyi rocket.

This time the rocket was launched, everyone in the control center was not as nervous as last time. Although the Changsanyi rocket had a history of accidents, the various inspections before the launch gave everyone the confidence to relax.

Zhang Xingyang was even in the mood to take a sip of water, thinking about various things about the recoverable rocket.

The three-stage rocket carrying two dummy satellites quickly reached an altitude of hundreds of kilometers above Earth.

The orbit of Iridium is a low-Earth orbit with an altitude of 700 kilometers. Generally speaking, the altitude below 2,000 kilometers is considered a low-Earth orbit, which is the LEO orbit that everyone often sees in the news.

Most of the world's earth observation satellites, geodetic satellites, space stations and some communication satellites are within this altitude range.

For example, the International Space Station and the Tiangong Space Station are both at an altitude of about 400 kilometers.

However, the construction of the International Space Station has not yet started at this time. In fact, at this time, various countries are still wrangling for their respective division of labor.

At present, everyone in China still hopes to participate in the construction of the International Space Station. After all, at the current stage, it is difficult to build a space station by relying on the strength of one country alone.

After all, the country currently has not mastered the technology of manned spaceflight, let alone the construction of a manned space station.

However, it is almost impossible for China to participate in the construction of the International Space Station, because the current level of domestic technology is still looked down upon internationally.

But Zhang Xingyang doesn't really care too much, as long as he has enough resources, it is not impossible to build a space station belonging to the Chinese people within ten years.

"Payload separation successful!"

Just when Zhang Xingyang was thinking about the development history of manned spaceflight, the little brother who was in charge of monitoring the rocket's operation status sent another piece of good news.

Zhang Xingyang looked intently at the screen in front of him, on which were the detection screens of various radars.

The two simulated satellites have successfully separated from the fairing and entered their predetermined orbits.

"Test the simulated satellite situation."

Zhang Xingyang gave instructions to the engineer in charge of monitoring the situation of the simulated satellite.

Because the orbital altitude of the satellite is only 700 kilometers, the delay between the satellite and the ground is still very low, and it is basically not felt.

Almost in an instant, the control center received the signal sent back by two analog satellites.

However, if the lunar exploration and manned lunar landing are really going to be carried out in the future, the communication problem will also be a very important problem.

After all, the closest distance to the moon is 363,000 kilometers. Even if the radio propagation speed is the fastest light speed in the universe, it takes two seconds to run back and forth between the earth and the moon.

"The simulated satellite is in good working order!"

When the engineer responsible for monitoring the status of the analog satellite said this sentence happily.

In the entire control center, there was extremely warm applause, and it felt like everyone was about to slap their palms off.

In the end, it was Zhang Xingyang who announced that the launch mission was a complete success, which stopped the applause that seemed to never stop.

"I declare that the experimental flight of the Chang San B rocket has been a complete success!"