China Satellite Communications Corporation has also redesigned on the basis of this photoelectric chip, mainly for various reinforcements, and the packaged chip is much larger than the civilian chip, but it is much smaller than the modulation and modem used on the satellite before, and the power consumption is greatly reduced.

The R&D team is also confident that the volume of this photoelectric modulator module will be made smaller, and the volume and weight of this laser communication device will be lower.

Now China Satellite Communications Corporation has Starlink network, a major business with an increasing business volume, and last year's revenue has reached 24.6 billion US dollars, and a large part of this money is still earned from many overseas countries, and the profit margin is very high.

At present, China Satellite Communications Corporation also allocates at least 12 percent of its R&D funds for R&D every year, so its R&D efforts are also very large.

Because the major shareholder of China Satellite Communications Corporation is Huaxing Technology Group Corporation, the proportion of members on the board of directors is the largest, and in recent years, a number of satellite companies that have been reorganized have been restructured and reorganized, which has also completely revitalized the domestic satellite communication industry.

Although Yang Jie did not directly manage this super-large mixed enterprise group company, Yang Jie's appearance did not dare to slack off in the whole group company.

Accompanied by everyone, Yang Jie visited the satellite assembly workshop, and he also carefully inquired about the three Tianyan series high-definition observation satellites that were being assembled in the workshop.

These three high-definition observation satellites, with a total weight of more than one ton, are also upgraded versions of the previous GF-1 satellites, equipped with higher resolution optical spectral detection instruments and equipment.

This satellite is equipped with an image sensor of hundreds of millions of pixels, which is also a high-performance complementary metal-oxide-semiconductor image sensor ordered by China Satellite Communications Corporation, which can shoot objects on the ground extremely clearly in hundreds of kilometers of space after being equipped with a high-precision zoom system.

In addition, the satellite is also equipped with a set of infrared imaging equipment and a set of ultraviolet imaging equipment, the resolution of infrared imaging equipment uses uncooled infrared array detectors, with 2 million pixels, and the ultraviolet imaging equipment uses gallium nitride-based photodetectors, and the pixels are also up to millions.

In recent years, Loongson Semiconductor has been developing gallium nitride aluminum-based ultraviolet detectors, and has also developed a high-performance ultraviolet focal plane array using a metal-semiconductor-metal structure, and has developed an ultraviolet imaging image algorithm model, because this ultraviolet focal plane array is very similar to semiconductor image sensors, and the pixels can be very high, and the pixels of the sensor array have reached 5 million pixels.

GaN materials have huge advantages in ultraviolet photon detectors, light-emitting diodes, high-temperature and high-power electronic devices, but this material is very difficult to prepare various transistors due to low doping and hole ionization, but Huaxing Technology Group has been making various attempts and improvements in the preparation process, and has also made many breakthroughs.

The gallium nitride material R&D center of Huaxing Technology Group Co., Ltd. uses this metal-semiconductor-metal structure on the ultraviolet detector for the planar type, and the preparation process is relatively simple, in the process of production, only the metal-semiconductor Schottky contact needs to be made, no need to make p-n junctions, no need to carry out n-type and p-type doping, no need to make ohmic contact, and the sun-blind ultraviolet detector made of this structure has high responsivity, low dark current, high ultraviolet and visible light rejection ratio, high detection rate, High quantum efficiency and many other advantages, a high-performance ultraviolet detector has been prepared. Lazy people listen to books

In addition to these three sets of photodetectors, the satellite is also equipped with a set of spectral imaging equipment, which is actually composed of three separate cameras operating in different spectral bands, divided into three spectral bands, green, red and near-infrared, which examine or combine the information collected by these cameras to provide more detailed spectral information about the object observed.

For this research and development project, Loongson Semiconductor has also specially developed an image sensor with relatively large pixels, with a resolution of 3 million pixels, high sensitivity to provide excellent signal-to-noise ratio, good sensitivity in the target spectral segment, charge capacity and dynamic range are to meet the design requirements, which is very suitable for this spectral imaging system.

The sensor array of the four systems, Loongson, also adds additional features such as electronic switches, transimpedance amplifiers, and associated dual-sample hold-up circuitry to reduce fixed pattern noise, as well as noise cancellation.

These technologies are all technologies that Loongson Semiconductor has accumulated over the years, and they are all used now.

Compared with the first-generation GF-1 observation satellite, the observation satellites of the Tianyan series have been qualitatively improved in technology.

Yang Jie also deliberately inspected the watermelon-sized magnetic confinement arc engine developed by Yonghan Aviation Technology Company for this Tianyan series satellite.

Yonghan Aviation Technology Co., Ltd. started the development of arc engine from 99 years of the last century, but the progress in the high-power arc engine project has not been much, the thrust of the engine in the atmosphere is still not enough, and the technical dilemma of little commercial value is not large, but it has made a lot of breakthroughs in the low-power arc engine, and now it has developed a variety of engines used in spacecraft.

A few years ago, the 20 kilowatt magnetic confinement arc engine successfully developed by Yonghan Aviation Technology Co., Ltd. was used in Gaofen-1, and the thrust reached the Newton level, that is, about 0.1 kg of thrust, and the efficiency has reached a very high level.

After several years of research and development, the 20 kilowatt power class arc engine has become smaller again, and the engine efficiency has been raised to a very high level, and the thrust of the engine has also been improved to a certain extent.

This is mainly due to the fact that the new arc engine uses high-temperature superconducting magnetic aggregation technology, which allows the plasma stream to be injected faster than before.

The dry weight of such an electric propulsion system does not exceed 140 kg, including 1 drive storage module, 1 pressure regulating module, 4 flow control modules, 4 arc engines and other auxiliary equipment, and the working life reaches more than 20,000 hours.

The energy generated by such an all-electric drive system is equivalent to at least 3 tons of chemical fuel, so it also greatly reduces the size and weight of the satellite.

For the same mission, if a chemical fuel engine is used, the satellite will weigh at least 5 tons, while if the magnetic confinement arc engine is used, the satellite will weigh more than a ton, which greatly reduces the launch cost.