China's Anti-Access ASBM Strategy [Defense News]

Discussion in 'Strategic Defense' started by mxiong, Jan 16, 2008.

  1. antiterror13
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    antiterror13 Colonel

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    so tracking CBG shouldn't be any problems then
     
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  2. Hendrik_2000
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    Hendrik_2000 Brigadier

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    Probably not but it need 60 satellite for 30 minute revisit rate It will take a while. Plus the coverage area is still small. But this is civilian satellite who what the military has in store. Here is more detail description of the rocket and satellite
    http://www.eastpendulum.com/deuxieme-vol-du-lanceur-cz-6-trois-satellites-en-orbite

    Second flight of the CZ-6 launcher, three satellites in orbit
    BY
    HENRI KENHMANN
    NOVEMBER 22, 2017

    The Taiyuan Space Center (TSLC) has just launched its second launch in less than a week, sending three new Jilin-1 civilian constellation video satellites in sun-synchronous orbit, using a CZ-6 rocket .

    This 13th Chinese launch of the year took place on Tuesday 21st November at 12:50 local time, this is the second flight for the small launcher CZ-6 and also its first commercial mission, after the success of its inaugural flight which has took place in September 2015 where 20 nano-satellites were sent into space.

    The second launch of the rocket CZ-6
    Among the new generation Long March launchers , to replace the aging CZ-2 and CZ-3, the CZ-6 is one of the two smallest in the family - with CALT Institute's CZ-11 solid propellant - designed to address the needs of mass satellites of about one ton.

    This newborn is being developed by the Shanghai Academy of Spaceflight Technology (SAST), a subsidiary of the Chinese aerospace group CASC and already building rockets like CZ-4B and CZ-4C . High 29.24 meters and a takeoff weight of 103 tons, the launcher in its basic configuration has a first floor of 3.35 meters in diameter and two others of 2.25 meters. The first two stages are propelled by LOX / Kerosene liquid propellant engines.

    The CZ-6 is capable of placing up to a ton of payloads in 700-kilometer heliosynchronous orbit.

    [​IMG]
    The YF-100 liquid propellant engine LOX / Kerosene, serving as the main engine of the 1st floor of CZ-6 (Photo: AAPT)

    [​IMG]
    The rocket CZ-6 Y2 (Photo: CASC)

    [​IMG]
    Take off of the second CZ-6 (Photo: Chinese Army)

    Note that the YF-100 engine developing a take-off thrust of 120 tonnes for the CZ-6 is also used on other new Long March launchers . It serves as booster thrusters for the CZ-5 heavy launcher and the CZ-7 medium launcher , and also feeds the first stage of the latter.

    Unlike older Chinese launchers where assembly and testing of bodies and integration of satellites are done vertically, the CZ-6 as well as its competitor CZ-11 perform these tasks horizontally on the ground. The rocket is raised once everything is ready for launch, greatly reducing the need for support infrastructure and therefore the preparation cycle.

    The SAST is aiming at the 7-day duration of the launcher's preparation, compared with more than a month for the older generation rockets. For this second flight of the CZ-6, the ground staff took 17 days to finalize the set of tests and filling, knowing that the pitcher was on the firing line five days before the launch date.



    It should also be noted that the launcher is transported from the preparation hall to the firing point via an automated vehicle. But unlike a launcher Tractor-Launcher (TEL) for ballistic missiles, or for the CZ-11 of the CALT Institute and the new Kuaizhou launchers of the CASIC group, the launch vehicle of CZ-6 leaves the site a both the support arm and the rocket are fixed on the firing point.

    Given the location of the TSLC space center, the CZ-6 is designed to withstand very low ground temperatures down to -40 ° C before launch. The engineers ensured that the temperature under the caps was maintained at 15 ° C to protect the three satellites - Jilin-1-04, 05 and 06 - while the rocket was "naked" on the firing point for five days , with an outside temperature dropped to -23 ° C in the night.

    It is also known that SAST plans to fly a vertically recoverable version of CZ-6 by 2020. The first test of aerodynamic rudder gates for steering control will be conducted in 2019 on a CZ-4B rocket.

    The NORAD ra listed four objects in orbit after yesterday's launch, which correspond to the three Jilin-1 satellites (Object A, B and C) and the third stage of the CZ-6 launcher respectively. The satellites were sent in an orbit of 530 km × 545 km × 97.53 °.

    2017-074A
    1 43022U 17074A 17325.84286224 -.00000063 00000-0 00000 + 0 0 9993
    2 43022 97.5369 61.0285 0010450 263.3075 96.6965 15.09144222 102

    2017-074B
    1 43023U 17074B 17325.84279512 -.00000063 00000-0 00000 + 0 0 9996
    2 43023 97.5362 61.0251 0009779 267.2796 92.7207 15.09299834 98

    2017-074C
    1 43024U 17074C 17325.84277802 -.00000063 00000-0 00000 + 0 0 9997
    2 43024 97.5373 61.0251 0009762 268.6421 91.3690 15.09345276 96

    CZ-6 R / B
    1 43025U 17074D 17325.64395390 -.00000099 00000-0 00000 + 0 0 9998
    2 43025 97.5362 60.8484 0101844 25.6560 12.3661 15.33992586 66

    No airmail messages (NOTAM) were reported for this launch.



    Jilin video satellites-1-04, 05 and 06
    The Jilin-1 constellation is a terrestrial observation program funded by Jilin Province in China. The initial goal is to put into orbit about 60 small satellites by 2020, able to revisit any point on earth in every 30 minutes, and 10 minutes by 2030 with 138 satellites.

    The first four satellites - the Jilin-1 Optical A, the Jilin-1 Video 01 and 02, and the Jilin-1 Agile - were successfully launched by a CZ-2D rocket in October 2015. A fifth satellite, the Jilin -1 Video 03, quickly joined them in January this year .

    The latter provides a maximum resolution of 0.92 meters with a field of view of 11 × 4.5 km . The 165 kg satellite measures 1085 mm × 553 mm × 1340 mm, its theoretical life is estimated at 3 years. It served as a basis for the development of the three new Jilin-1-04 to 06 satellites launched yesterday, whose duration did not exceed 11 months.

    The manufacturer of these satellites, Changchun Institute of Optics, Fine Mechanics and Physics, a subsidiary of the Chinese Academy of Sciences, broadcast in 2016 a video showing the sequences taken by its first two video satellites and possible applications.



    According to the director of the Jilin-1 program, the three newborns are making significant improvements in the swath width of the cameras , from 11 × 4.5 km to 19 × 4.5 km.

    The color video resolution is one meter. The satellites are also heavier - totaling 635 kg, or about 208 kg each - compared to their predecessor.


    With eight satellites now in orbit, the constellation will bring the period of revisit to one day, against three before.
     
    #82 Hendrik_2000, Nov 22, 2017
    Last edited: Nov 22, 2017
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  3. Hendrik_2000
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    Another YG-30 triplet put into orbit to locate aircraft carriers
    BY
    HENRI KENHMANN
    http://www.eastpendulum.com/un-autr...-orbite-pour-la-surveillance-des-porte-avions

    China yesterday made its fourth space launch of the month by putting into orbit another triplet of YG-30 military satellites . The CZ-2C rocket took off at 2:10 am local time at the Xichang Space Center, in the middle of mountain ranges in China's Sichuan Province.

    Officially, this second group of YG-30 satellites will be devoted to the analysis of the electromagnetic environment in orbit and associated technology testing, but just like the first group of three other satellites launched in late September this year, it is thought that it is actually a new family of Chinese military reconnaissance satellites, responsible for determining the position and movements of enemy military fleets through the use of wiretapping, like the Naval Ocean Surveillance System (NOSS). ) of the US Army.



    The start
    Developed by the Chinese Academy of Launch Technology (CALT), a subsidiary of the Chinese aerospace group CASC, the CZ-2C is a two-stage liquid propellant launcher specializing in low-Earth-orbit (LEO) and sun-synchronous orbit launches (SSO).

    It is an "old" generation launcher using hypergolic propellants, which is 43.72 meters high and 245 tons on take-off, and capable of placing up to 3,300 kg in Circular LEO orbit 300 km × 29 ° from the Xichang Space Center (XSLC).

    Thirteen Chinese satellites with return capsules, US Iridium satellites , as well as several Chinese military and experimental satellites have already been launched thanks to the CZ-2C, which now has 42 hits on 43 flight missions made public.

    The launcher's only failure was on August 18, 2011 during the launch of the SJ-11-04 military satellite . A mechanical failure of the 2nd floor would be questioned.

    The CZ-2C is also used as a carrier rocket for various military engines, such as the DF-ZF hypersonic glider for its last seven tests. Which is not surprising in itself when we know that it is derived directly from the Chinese ICBM missile DF-5.

    The launch of the triplet YG-30 Group 02 (遥感 30 号 02 组) took place this Saturday, September 29th at 02: 10: 05.130 local time precisely, on the launch pad n ° 3 of XSLC. This shot that is used to accommodate larger rockets such as the CZ-3 will remain in this technical state, configured to support the CZ-2C, at least until the Chinese New Year in 2018.

    The CZ-2C is the only launcher ever launched from the three Chinese space centers TSLC, JSLC and XSLC (but not yet at WSLC, the new and 4th Chinese space center on Hainan Island).

    [​IMG]
    The rocket CZ-2C Y30 on the shooting pad n ° 3 in the center XSLC

    As with the first triplet launch two months ago, the CZ-2C designers have designed a new under-head bracket to fix the three satellites. This new configuration will be integrated elsewhere in the "V4.0" plan that the CALT institute has planned to extend the already very long career of the rocket.

    The aim is to further reduce the CZ-2C preparation cycle and makes him a reliable vector, responsive and very cheap for small satellites, including those that are too large for new launchers solid propellant as CZ- 11 and KZ-1A .

    Content of the XSLC center's geographical location, which is entering the high-altitude high-altitude season, the engineers have also reprogrammed the CNG system to alleviate this problem, plus others that come from higher humidity levels in a very hot area. stormy.

    A single message to aircrafts was created to signal a fallout area in the very center of the mountainous Guizhou Province, the local government of Yangshan, a county in northern Guangdong Province, also warned its residents risk of falling caps in the vicinity.

    A3444 / 17
    Q) ZPKM / QRTCA / IV / BO / W / 000/999 / 2647N10713E015
    A) ZPKM B) 1711241800 C) 1711241827
    E) A TEMPORARY RESTRICTED AREA ESTABLISHED BOUNDED BY:
    N263510E1072251-N264300E1065708-N265820E1070259-N265028E1072844
    BACK TO START. VERTICAL LIMITS: GND-UNL.
    F) GND G) UNL



    [​IMG]
    Flight Direction and Fallout Zones Reported for Launch of YG-30 Group 02 (Image: East Pendulum)

    According to NORAD data, the three satellites were injected into an orbit of 590 km × 604 km × 35 °, with a periodicity of 96.62 min. This orbital plane makes an angle of 120 ° with that of the YG-30 Group 01 triplet launched in late September, so it lacks at least one other launch, offset by 120 ° again, to have a total coverage of the globe.

    A fourth object has also been listed by NORAD which is the last stage of the rocket.

    OBJECT A
    1 43028U 17075A 17329.08402438 -.00000027 00000-0 00000 + 0 0 9997
    2 43028 34.9965 309.9232 0010681 294.4110 130.3531 14.90330611 59

    OBJECT B
    1 43029U 17075B 17329.08445946 -.00000027 00000-0 00000 + 0 0 9999
    2 43029 35.0001 309.9444 0009487 286.3632 140.8123 14.90404942 40

    OBJECT C
    1 43030U 17075C 17329.08622319 -.00000027 00000-0 00000 + 0 0 9992
    2 43030 34.9948 309.9043 0010849 296.1554 140.5326 14.90422300 29

    CZ-2C R / B
    1 43031U 17075D 17329.08340975 -.00000053 00000-0 00000 + 0 0 9997
    2 43031 35.2151 310.1448 0103082 55.9855 29.6258 15.12796120 42

    It should be noted that the Yuan Wang 7 spacecraft and monitoring vessel , the newest of the Chinese BEMs, has been part of the orbiting of the South Pacific Ocean.



    YG-30, a new Chinese NOSS-like
    Just like its twin constellation YG-30 Group 01 launched on September 29 this year , this new satellite triplet is designed by the Shanghai Engineering Center for Microsatellites , a fialiale of the Chinese Academy of Sciences. It should be noted that the SECM gave another name to these satellites, Chuang Xin 5 (CX-5, 创新 5 号), which means "Innovation 5" in Chinese.

    These would be ELINT reconnaissance satellites to determine the position of naval fleets by basing on their electromagnetic emissions, and to track the movements of these. But unlike the five constellations launched between 2010 and 2014, namely YG-9 , YG-16 , YG-17 , YG-20 and YG-25 , which are placed in 1,100 km × 1,100 km orbits × 63 °, the first two groups of YG-30 were put into lower orbits at about 600 km × 600 km × 35 °.

    The low inclination of these new satellites suggests that they are rather dedicated to monitoring low latitude areas (N35 ° to S35 °), such as the Indian Ocean, the South China Sea and the Philippine Sea for example, and will increase the revisit period and thus improve the effectiveness of monitoring these priority areas.

    [​IMG]
    The 3 orbital planes of JB-8

    [​IMG]
    [​IMG]

    The three satellites of the constellation YG-30 Group 02 (Image: CCTV)

    If we believe in the recent statement by an official of the XSLC space center , two more YG-30 triplets will be launched before the next Chinese New Year, which will take place in February 2018. China will therefore have nine dedicated ELINT constellations to hunt for important marine targets, including aircraft carriers, in the four corners of the world's oceans.

    These remote sensing capabilities are complemented by other Chinese optical and radar satellites for all-weather, all-weather coverage and redundant on the naval force projection tools of its "potential enemies" (see the excellent " Chinese satellites and maritime surveillance "written by Clément).

    The objective is not only to monitor, but also to provide shooting parameters for the various anti-ship weapons developed for the Chinese army, such as anti-ship ballistic missiles (ASBM) with a range of up to 4,000 km Chinese coasts.



    Historical statistics
    This launch is the 14th Chinese space launch in 2017, the 43ᵉ for the CZ-2C launcher, and the 256ᵉ for the Long March launchers family.

    For now, the Long March rockets of the group CASC total 245 successes and 11 failures, a success rate of 95.70%.

    Here is the chart tracking all the Chinese space launches since the first in 1970, including those that are not made by Long March launchers -
     
  4. Hendrik_2000
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    Hendrik_2000 Brigadier

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    Anyone still in doubt as to the Chinese capability to track ship at sea should read this excellent treatise on the subject It is a long one I provide the link but unfortunately in French If anyone interested I can translate it but I provide the conclusion. Basically it said no more place to hide unlike in WWII
    http://www.eastpendulum.com/les-satellites-chinois-et-la-surveillance-maritime

    IV. Analysis of the capabilities of the global system

    There are two ways to approach marine surveillance:
    1. detect and identify all ships in a more or less wide area
    2. once identified, track over time only the vessels of interest
    To assess the capabilities of the Chinese reconnaissance system, let's take conservative assumptions about satellite capabilities:

    • In times of crisis the warships strongly limit their emissions, which makes the ELINT system blind.
    • SAR constellations have only 2 active satellites each
    • SAR satellites have a swath of 300km, and insufficient resolution to identify ships.
    • Optical satellites in low orbit do not have a swath sufficient to be useful, except for the JB-9 wide-field constellation.
    • For the JB-9 constellation, satellites have a swath of 300km and can not image at night. It has 4 active satellites.
    • The satellites can image 10 minutes per orbit, giving a maximum swath length of 4000km.
    • The geostationary Gaofen-4 satellite can not detect smaller vessels than an aircraft carrier.


    For a given place, during the same day, there are 12 satellite passes:

    [​IMG]
    Local time of satellite passes during the day

    Detection and identification
    With regard to the detection of all vessels over a wide area, as a first approximation (without taking into account the movement of the ships) the interesting quantity is the total field of view of the satellites, compared to the distance between two passes . Indeed, if a satellite has a 3000km field of view, and when it passes vertically from one point during an orbit, it passes 3000km further in the next orbit (which is typical for a satellite in orbit bass), then he is able to scan the entire earth's surface.

    With the previous assumptions the combined swath would be 300km x 12 = 3600 km. The system could therefore provide a complete sweep over an area of 4000km in the North-South direction, and at least 3200km in the East-West direction, within a single day. However, as only JB-9s can identify a vessel, vessel identification would only be possible on one-third of the area, which would allow some vessels to pass through the net for a period of time.

    Follow-up over time
    In order to track a ship that has been identified in advance, in order to be able to locate it at regular intervals, it is best that the passes be distributed at regular intervals throughout the day. This is not the case, so it may take up to 4:40 between two successive passes (YG10 and YG18 in the evening). This is enough for a ship to travel 250km at 30 knots, and therefore if it has changed course, probably comes out of the field of view of the satellite in charge of following it.

    In addition, SAR satellites flying relatively low, they have only one chance out of two to pass sufficiently above a given ship to be able to image. A fast maneuvering ship often has a good chance of regularly escaping the constellation's surveillance, forcing it to re-enter a research phase.

    However, around 10:00 am and 1:30 pm local time, the JB-9 satellite pair passes provide the position, course and speed of a ship (if the first satellite has managed to find the ship, the second can find it and thus calculate its average speed), and confirm its identification. This provides a solid track that could serve as a firing solution for fast missiles like the DF-21D , or more conventional missiles launched from a ship or aircraft already placed close to the target.

    Conclusion

    China has a triple capability radar, optical and electronic detection, identification and tracking of ships at sea. Even without taking into account the real-time tracking capability from the geostationary orbit, the large optical constellation JB9 field and SAR constellations JB-5 and JB-7 can scan a wide area every day to find contacts of interest, and have a good chance to refresh the tracks of the most interesting contacts every few hours, even for ships without electromagnetic emissions. As a result, it seems unlikely that an opposing naval group will be hiding in the ocean for a long time.

    However, in case of very large cloud cover, only SAR satellites can be used, which can severely limit the identification and monitoring capabilities of the system. That does not mean that China would be blind: other means of detection, like its transhorizon radars , or simply its long-range planes can complement the satellite system, and thus seriously question the invulnerability of US aircraft carriers to the sea. The intervention of the United States to intervene in a new crisis in Taiwan would be much more risky, and therefore much less likely.

    sources
     
  5. Hendrik_2000
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    Hendrik_2000 Brigadier

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    From Henri K blog look like they tested it in the Bohai bay
    There have been three Chinese military trials that resemble those of the ASBM DF-21D on the 5th, 9th and 13th of December. The corresponding no-go areas are larger or smaller and are all in Bohai Bay, as usual.
    [​IMG]
     
  6. taxiya
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    taxiya Major
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    https://www.youtube.com/watch?v=HFddVuOwJLQ

    watch from around 1:36:00
    Answer to a question by saying something about DF-21D and DF-26
    1. clearly said D type
    2. Soviet tried 26 years, US tried more than 10 years
    3. There was two tests
      1. first in Yellow sea, knocking out YuanWang-4
      2. second was in "South China Sea?" on July 13 2016, knocking out another ship, one day after the "verdict" of "arbitration" of SCS on July 12 2016.
    4. The speaker jokingly said that the US navy was "invited" and present in the vicinity
    Speaker is Renmin University professor in a think tank. Audience who asked the question was from China Aerospace Science & Industry Corp? So seems to be people who could be aware of inside information.
     
    #86 taxiya, Mar 20, 2018
    Last edited: Mar 20, 2018
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  7. t2contra
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    So they witnessed the success of the test. No wonder the Navy honchos never dismissed the threat of DF-21D.
     
  8. Hendrik_2000
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    I guess this picture tell it all with enhanced radar reflector
    Back in 2011 in Q&A session the then Defense minister Chen Bingde confirm it but he couched it in self deprecitaint manner saying it is only IOC
    http://www.andrewerickson.com/2012/...2700km-range-gen-chen-bingde-never-said-that/
    Here is a translation of General Chen’s statement:

    Q: “I’m with the Associated Press and I have a question for General Chen. …There’s been much speculation about the operational readiness of the Dong-Feng 21-D, the so-called “carrier-killer” missile…. Can you give us some up-to-date information about these programs….”

    GEN. CHEN: “Thank you for – (inaudible) – your questions to me. As for DF 21-D, in our meeting, Admiral Mullen talked about it. As for this type of weapons system, it is still under research-and-development process. It is not equipped yet. Even though we – if – even though if, in the future, we are successful in research and development of this kind of weapons system, it will, and remain, be a system for defense. And I expect that Chinese scientists will make some contributions in this aspect.

    However, for all kinds of high-tech weapons systems, as far as the research and development is concerned, that is not an easy thing to do, because it requires a huge amount of resources, timings, technologies and so on. …


    [​IMG]
     
    #88 Hendrik_2000, Mar 20, 2018
    Last edited: Mar 20, 2018
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  9. watdahek
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    watdahek New Member
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    This guy should not be treated as a credible source for military details. He said something about Chinese fusion weapons being easily maintained and stored, and that everyone else have already lost/destroyed their thermonuclear weapons because they are too costly to maintain. His nickname on the Chinese internet is political commissar of the bureau of strategic huyou (deceit).

    It even has its own Chinese Wiki hahaha https://zh.wikipedia.org/wiki/战略忽悠局
     
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  10. taxiya
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    taxiya Major
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    Treat it just as "Some says it, I hear it."

    However, I don't think existence of an event is of detail. One either know or don't.

    He may be "huyou" if he said it in a CCTV talk show. But he could be very serious when he talked to internal audiences. I have said that the audience in that video are not Tom and John from the street. They are people from the R&D institution of the rocket program which is the same institute of missile development. Put it in this way, it is like someone talking about testing event of F-22 to people from B-2 developers. Do you think B-2 guys would not laugh at him if he said something that F-22 could not have done?

    Why do you think the Chinese Wiki page is any evidence of his "non credibility"? Anybody including you and me can just go and create a page like that saying whatever one want to say.

    I know his background, he is in the same class as those Admirals and Generals in the CCTV talk shows. Some of them are quite well respected among netizens, some are called "huyou". One has to pick what to believe, NOT based on who said it, but on things from other sources that can be used to cross exam.
     
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