Chapter 1387 Radar Station in the Mountains


    Earlier in the day.


    The Minshan Mountains in the southern part of Longyuan Province.


    Even though it is still midsummer in late August, you can still feel a little coolness in the mountains in the southwest.


    In the hazy mist, Guo Lin wrapped his camouflage collar tightly and looked at the two helicopters hovering in the distance.


    "Mr. Guo, the wind speed of the No. 3 lifting point suddenly increased to 15 meters per second!"


    The correspondent of the engineering company poked his head out of the temporary command tent, and the walkie-talkie in his hand sizzled.


    Guo Lin raised his telescope and saw that the steel cables in the cargo box were shaking violently. Several ground guides waved fluorescent indicator sticks and desperately signaled the helicopter to climb.


    Colonel Zhang Xiyang, the commander of the China Airlines Group, has issued an order on the radio:


    "So hover higher than the peak for a while, and wait for this gust of wind to pass!"


    His arm was injured in a mission last month, so he could only stay on the ground for command today.


    Originally, with the direct 12B during design, it could resist the eighth-level winds of 20m/s in a short time, but the ridges of Minshan Mountain are generally above 3500-4000 meters, and the air is relatively thin. In addition, the rectangular cargo box hoisted under the fuselage Slightly shaking in the airflow, turning the originally clever helicopter like a clumsy iron bird.


    "The terrain of this ghost place looks like a natural wind tunnel, and the weather forecast is still a bit too optimistic..."


    Liao Yongcai had come behind Guo Lin and Zhang Xixiang at some time, and his rough fingers drew an arc on the contour map next to him, pointing to another nearby ridge line:


    "Are you consider implementing Plan B? Platform No. 4 is a leeway, and the uninstallation difficulty should be lower than here, and the distance also meets the requirements..."


    Guo Lin looked down at the map, and a hint of hesitation appeared in his eyes:


    "The selected points are definitely fine in terms of distance, but the angle of the No. 4 platform is a bit awkward..."


    Liao Yongcai insisted:


    "Strong winds not only affect the transportation and assembly process, but the YLC-1 radar is not a big guy fixed on the foundation like 7010, and will also be disturbed by external factors..."


    Before he finished speaking, he heard the harsh sound of metal twisting from afar.


    The two of them turned their heads at the same time, and they saw the fixture on the side of the cargo box rubbing through the protruding rock wall, splashing out a string of sparks.


    Guo Lin suddenly felt a burst of hair standing upside down—


    Fortunately, there are only mechanical equipment such as chassis and antenna bases in it. As long as the external structure of the cargo box is intact, there is no big problem.


    If it is a broadband digital array module worth hundreds of millions of yuan, then any violent collision may lead to the scrapping of precision crystal oscillators.


    He quickly nodded to Zhang Xixiang:


    "Captain Zhang, uninstall it on the backup No. 4 platform!"


    After receiving the order, the helicopter group immediately adjusted its formation and swept across the ridges of intertwined dogs like a migrating geese formation.


    Liao Yongcai looked at the group of aircraft that had re-hidden into the clouds and suddenly laughed:


    "I heard that when the Gambala Radar Station was built in the early years, some things even needed to be carried to the mountains with manpower or mules and horses..."


    Zhang Xixiang put down the radio, raised the military kettle and drank two sips of water, and then breathed a sigh of relief:


    "To be honest, this time it''s not easy..."


    He pointed to the hovering helicopter on the other side:


    "After changing the 12B, the external lifting capacity reached 2,500 kilograms... If there were no new aircraft delivered in advance, and the pilots had recently accumulated a lot of flight experience on complex terrain, they would probably be lifted at this altitude of Minshan Mountain. Can''t get up."


    A complete radar needs to be split into about 6-8 cargo containers to complete air transport. If 26 meters are dispatched, it can save this trouble in theory, but in reality it is difficult to ensure safety at such an altitude and environment. …


    It was not until afternoon that six camouflage-painted cargo boxes and a light crane were finally transferred to a platform halfway up the mountain. The soldiers of the Engineering Company immediately began to set up auxiliary devices, dark gray photovoltaic panels and The bright silver debug antenna glows a metallic luster under the scorching sun.


    "To be honest, your radar site selection is really tricky..."


    The most challenging part of the task has been completed, and the rest are just small tasks such as personnel transportation. Zhang Xixiang has also become much more energetic:


    "I thought it was already very extreme to do a single-wheel hover on the edge of the dam, but I didn''t expect that it would be a big deal compared to today."


    Guo Lin sighed softly when he heard this:


    "There is no way, this is the least difficult solution in total... There are 7 antennas in total, only this one is more troublesome. At most, the number 3 antenna is closer to the railway line and needs additional disguise. The rest are all The radar car is done when it reaches its position…”


    The temperature difference between day and night in this place is extremely large, and it makes people tremble in the morning, and at noon, the sun hits the top of the head.


    He took off his camouflage hat and gently fanned himself, watching the engineers assembled the folding phased array antenna, a total of eight meters high, and then slowly unfolded and raised.


    "I heard you say before that it seems to be arranged at a specific spacing?" Zhang Xixiang is now a formal member of the "Thousand Means Survey Sky" plan. Although he doesn''t know much about radar technology, he has heard some of them just a few words.


    “It’s 154.08km.”


    Liao Yongcai remembers it very clearly:


    "Although I don''t know why it''s necessary... I will definitely not make any mistakes when it comes to the requirements."


    "This is calculated based on the ultra-high-speed motion object detection method matching Fourier transform. By searching the target velocity and initial distance, the matching processing with the echo signal is achieved, and the accumulation of high-order terms in the echo phase is eliminated. Influence."


    Guo Lin drew two interlaced sine waves on the land under his feet:


    "When the detection beam of adjacent radars forms a specific phase difference, the echo signal can automatically transmit tracking rights like a relay race to avoid the problem that we encountered in the last test, and the signal will change again without time to track. ”


    In fact, Chang Haonan also said that the spacing can be set to an integer multiple of 154.08km and a certain degree of error can be allowed.


    However, due to the insufficient preparation cycle of this test, it has been quite good at equipment, so the deployment location must naturally be improved.


    As the few people talked, the auxiliary desk used for equipment debugging had been built.


    "Let''s go."


    Guo Lin patted Liao Yongcai on the shoulder:


    "Prepare to receive the synchronous test signal..."


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    …


    As twilight fell, the first set of test signals finally penetrated the ionosphere.


    In the command tent, Liao Yongcai stared at the jumping spectrum map on the screen, and fine beads of sweat oozing from his forehead.


    Suddenly, the red light spot representing another No. 6 antenna strangely split into three phantoms at the boundary of the relay satellite, and the synchronization state on the screen also changed from "connecting" to "synchronization failure".


    It is naturally impossible to connect several mobile radar stations apart one hundred kilometers through wired connections, so they can only share signals with relay satellites to ensure the synchronization level at the cost of a little delay.


    Of course, if the Qianmu Sky Survey Plan can eventually become a regular, then the fixedly deployed strategic radar antenna will definitely be equipped with corresponding underground optical cable facilities.


    “Phase mismatch caused by delay.”


    Guo Lin quickly made a judgment, then looked down at the other computer in front of him.


    Above is an orbital infographic of several satellites.


    Then turn to the radio liaison not far behind him:


    "Notify the Measurement and Control Center and request to calibrate the orbital inclination of Qingluan 2 03C star, and then try again..."


    For this grand plan that could provide early warning of hypersonic weapons, the superiors did pour in quite a lot of resources, and even allowed Guo Lin to direct the attitude adjustment of the satellite for this purpose.


    However, part of the reason is that several satellites in Phase 21 of Qingluan 2 have entered the end of their lifespan and will be replaced by Phase 2 constellations that are currently in the process of launch.


    When the data stream after the third track correction finally entered the system, the three phantoms on the monitoring screen instantly collapsed into clear light spots, which is a sign that the synchronization system completes calibration.


    A depressing cheer erupted in the tent—


    The No. 7 antenna is already the last one in the entire system, so this also means that the preliminary debugging work of the entire plan has come to an end.


    In the future, just wait until each antenna is deployed and then inject the operating parameters into it.


    In terms of the accuracy of the satellite-borne atomic clock, the synchronization rate can be maintained above the standard line at least in the following months.


    "I still feel it''s not true."


    Liao Yongcai touched the Jincheng brand cigarette in his pocket.


    But after thinking about it, it still didn''t ignite:


    "At that time, we used hundreds of steel and cement and electronic components of car skin to build the largest phased array in Asia."


    He pointed to the radar array extending like a galaxy in front of him:


    "Now, when these antennas are added together, they can only be equipped with more than twenty trucks at most, but they can monitor half of the northern hemisphere together..."


    (End of this chapter)