If you talk about the problem of communication relay, the UAV as an excellent platform is indeed more feasible, but limited by the flight altitude of the UAV, and the air time is still too short, even if it can have a day, two days of long endurance, but it still seems a little too short, at least this guy can never be more suitable than the satellite relay in space. Pen, fun, and www.biquge.info

This also proves from the side why Yang Hui proposed the UAV relay scheme, and even after careful discussion between the two sides, he immediately mentioned the new scheme of satellite relay, and this is completely caused by long-distance communication relay, and there is no other way than to use relay satellites.

Relay satellite, this thing is usually said in the public publicity materials that this thing is a satellite of the satellite, responsible for spacecraft and ground communication relay in space activities, and the role is to monitor the flight attitude and trajectory of the spacecraft when launched, and on the other hand, it is a long-distance communication relay.

But in fact, few people know that the communication relay satellite is actually not only the kind of communication between the spacecraft and the ground in the public propaganda, the same relay satellite, it can also play a long-distance communication relay between the ground and the ground, effectively making up for the communication problem between the UAV and the ground.

In the United States, to solve the problem of long-distance communication relay of UAVs, it relies on a complete set of relay satellite support, and in this way, the long-distance communication of UAVs can be guaranteed.

The United States launched the first "Tracking and Data Relay No. 1" in 83, and the Soviet Union launched a military satellite called the "Confidential Data Relay System" in 82 years earlier, and the subsequent United States and the Soviet Union launched a vigorous relay satellite war in the 80s.

The United States has successively launched seven "tracking and data relay No. 1-7" and established the first generation of systems in the network, of course, in fact, in the following ten years, these satellites launched by the United States can only keep one satellite in orbit for various reasons.

The Soviet Union also launched more than 4 satellites of the same type in ten years, and this is the competition between the first generation of tracking and relay satellites.

After more than ten years of development of the first generation of tracking and relay satellites, in the mid-90s, Russia, the largest successor after the collapse of the Soviet Union, also stopped the supplementary maintenance of the tracking and relay satellite system from 95 years ago, just as it could no longer support the development of the GLONASS global navigation system, and since then there has been a break of nearly ten years.

The United States began to develop the second-generation system in 95 years, and since then it has opened a gap with the world in this field, and even later Russia needs to spend millions of dollars every year to purchase relevant tracking and control services from the United States when launching spacecraft

Also in the 90s, Europe and Japan also began to get involved in this field, but Europe only launched the first satellite of this type in 1999, and Japan began to launch test satellites in 95 years, which is considered to be a small step and fast running route, and the Republic naturally needs to catch up in this field, which is the "Sky Chain Satellite System".

Considering these circumstances, there is no intention to hide it, and AVIC Southwest needs this thing now.

"We must have a complete set of communication relay satellite system, in order to meet the needs of UAV information relay, and this complete set of relay system to be built, may involve a lot of aspects, which may have to wait until 96 or 97 years or so to have a preliminary regional communication relay capability."

When it comes to the use of relay satellites, the army is even more confused, that is really the communication relay satellite this thing is too high-end, now this is the ability of the United States and Russia only two countries have, AVIC Southwest now actually said to provide this kind of service, it is simply incredible.

Stumbling and saying, "Medium... Relay satellite, this thing is not yet in our country does not have the ability to develop, and the army does not want to invest in this area, so the solution proposed now is still unreliable, if it really does not work, it is better to take the technical solution of UAV relay. ”

This brings us to the republic's ability to build relay satellites, so the very bad situation is that the republic has indeed carried out a series of pre-research in this area, and even carried out research in this area in 94, but the technology at this time is still immature.

After these related technologies matured, the famous "Sky Chain System" was born, which provided a powerful technical TT&C service for the Republic's manned space project, but now AVIC Southwest has this need, it must be difficult to make this satellite system successfully networked in advance, after all, the space system is still relatively small affected by butterfly wings.

In addition, it is very difficult for the army at this time to reallocate all kinds of research and development funds according to the needs of the southwest of AVIC, and this is obviously impossible.

Therefore, the only possibility is that the southwest of China Aviation will pay for the construction of this satellite system: "I also know something about this problem, the country is pre-researching our own tracking and relay satellites, and the current technology maturity is indeed not very high, but this time the UAV needs not all the tracking and relay capabilities, we only want the relay capabilities, and the domestic communication satellite development work in this area has passed, so it is still a certain experience." ”

The reason why there is no need for tracking and control capabilities this time is because whether it is the "Sky Chain System" in the future, or the systems of the United States and Russia, these satellites have both tracking and relay functions, and this tracking function is certainly not necessary for UAVs in the atmosphere, and the tracking accuracy of this satellite is far from meeting the needs.

As long as this can be guaranteed, whether it can ensure the accurate positioning and tracking of UAVs in the future, this is not too important, and then only need to ensure the general requirements are enough, and civilian GPS is definitely used in the navigation of the army of the Republic.

What's more, now AVIC Southwest has also invested a lot of energy in GLONASS, and when the time comes, the satellite positioning receiver in the satellite-guided bomb will be improved, and the natural drone can also use it, and then cooperate with the special communication relay satellite to solve the flight control problem.

AVIC Southwest's current UAV needs only a communication relay, or AVIC Southwest out of the later use of this complete set of satellite relay system needs, can not let this satellite system have tracking capabilities, otherwise this will be a PRISM door incident in the future, at least Yang Hui dares to say that AVIC Southwest needs to use this system, which naturally means that this system cannot be just military, or UAV use. (To be continued.) )