China Ballistic Missiles and Nuclear Arms Thread


taxiya

Colonel
Registered Member
Why is the missile spinning ??
The missile is multi-staged. The warhead (KKV) is also powered. So you are seeing the warhead maneuvering to the target, but also seeing the spent stages spinning while falling through air and wind with initial velocity and trajectory. The very faint dot at the front is the warhead, the much brighter and bigger objects are the booster stages.
 

Temstar

Junior Member
Registered Member
Why is the missile spinning ??
The spinning is 2nd stage booster doing a "energy management maneuver", the spin decreases the final velocity of the KKV (basically it's a way to waste delta-V), you do it if the target isn't going fast enough to require the full capability of the interceptor. Some of the US ABM test you see this too, this is THAAD:
Tems11.jpg

Note that THAAD is KKV + 1 booster stage, this ABM test might be something like a "range boosted THAAD" with KKV + 2 booster stages. Hence why instead of doing the spin relatively close to the ground it does it much higher up shortly after 2nd stage ignition. The first stage probably doesn't have the maneouverability to do that as it's job is mainly to get the rest of the interceptor going fast enough and high enough.

In the context of this test the target vehicle might be a DF-21 or DF-4 with modified upper stage. Since it's not a full on ICBM like DF-41 or DF-5 the full capability is not required, hence the spinning.

It does show the interceptor is flexible enough to handle both ICBM and MRBM.
 
Last edited:

ZeEa5KPul

Senior Member
Registered Member
The spinning is 2nd stage booster doing a "energy management maneuver", the spin decreases the final velocity of the KKV (basically it's a way to waste delta-V), you do it if the target isn't going fast enough to require the full capability of the interceptor. Some of the US ABM test you see this too, this is THAAD:
View attachment 68462

Note that THAAD is KKV + 1 booster stage, this ABM test might be something like a "range boosted THAAD" with KKV + 2 booster stages. Hence why instead of doing the spin relatively close to the ground it does it much higher up shortly after 2nd stage ignition. The first stage probably doesn't have the maneouverability to do that as it's job is mainly to get the rest of the interceptor going fast enough and high enough.

In the context of this test the target vehicle might be a DF-21 or DF-4 with modified upper stage. Since it's not a full on ICBM like DF-41 or DF-5 the full capability is not required, hence the spinning.

It does show the interceptor is flexible enough to handle both ICBM and MRBM.
Thank you for the excellent explanation. I had some idea what the interceptor was doing based on similar manoeuvres I've seen in ICBM tests

Do we know anything about what the interceptor is? HQ-19, 26, etc? Anything about its size, range, mobility?
 

Temstar

Junior Member
Registered Member
Do we know anything about what the interceptor is? HQ-19, 26, etc? Anything about its size, range, mobility?
Rumour says the interceptor is HQ-19, but that's probably just a wild guess. Xi Yazhou says he reckons the inceptor (which he refers to as "some type of HQ missile") is capable of both mid course as well as terminal phase interception. The reasoning is you can see the 2nd stage doing energy management maneuver within atmosphere, as if it's exoatmospheric the spiral exhaust will not be visible. Since the inteceptor is capable of such violent sideways acceleration like THAAD it must be also designed with terminal phase interception in mind.
 

Hendrik_2000

Brigadier
Via Hongjian Talking about 20 m resolution for geosynchronous SAR

The eyes of anti-ship ballistic missiles, the world’s first 20-meter resolution Geosar satellite successfully launched tonight​

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Published on 2021-02-05 00:24 Super Guerilla | Just
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This post was last edited by lyman2004 at 2021-02-05 00:45

This is the world's first geosynchronous orbit SAR reconnaissance satellite. 20-meter resolution L-band. He cooperated with low-orbit SAR satellites and high-low orbit optical reconnaissance satellites to form a satellite reconnaissance network, so that the
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United States could not hide.

The detection range of a single satellite is 4000 kilometers around China, and three satellites can monitor the world.

Another technology leads the United States, and this situation will increase in the future.

An excerpt from the popular science of GEOSAR imaging principles in a paper:
GEOSAR satisfies the basic principles of SAR imaging . Geosynchronous orbit satellites are actually satellites that run repeatedly in orbits with a certain inclination and eccentricity, so that there is a relative relationship between the platform and the earth. Moving, aperture synthesis can be achieved, thereby obtaining high-quality SAR images. GEOSAR has hour-level revisiting capabilities, has the advantages of wide surveying and mapping area, wide viewing range, and broad application prospects. This makes the GEOSAR system unique advantages, especially in repetitive real-time observation of the ground and response to emergencies The potential of the low-orbit SAR system is indeed beyond the reach.

This is a sub-system identification:
the spaceborne SAR active calibrator developed by this project is the first multi-band spaceborne SAR active calibrator in China. The working frequency band covers the four bands of L, C, X, and Ka. It can perform normalized calibration for the subsequent 3m differential interferometric L-SAR, 20m high-orbit L-SAR, 1m C-SAR and Luojia-2 01 satellites and other satellites for normalized calibration for the direction pattern measurement of the spaceborne SAR system , The measurement of calibration constants, relative radiometric calibration, absolute radiometric calibration and image quality evaluation and other scientific tasks.
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Hendrik_2000

Brigadier
Via Hongjian talking about 20 m resolution for Geosynchronous SAR satellite. They will find the CBG day and night or foul weather
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This is the world's first geosynchronous orbit SAR reconnaissance satellite. 20-meter resolution L-band. He cooperated with low-orbit SAR satellites and high-low orbit optical reconnaissance satellites to form a satellite reconnaissance network, so that the
Please, Log in or Register to view URLs content!
United States could not hide.

The detection range of a single satellite is 4000 kilometers around China, and three satellites can monitor the world.

Another technology leads the United States, and this situation will increase in the future.

An excerpt from the popular science of GEOSAR imaging principles in a paper:
GEOSAR satisfies the basic principles of SAR imaging . Geosynchronous orbit satellites are actually satellites that run repeatedly in orbits with a certain inclination and eccentricity, so that there is a relative relationship between the platform and the earth. Moving, aperture synthesis can be achieved, thereby obtaining high-quality SAR images. GEOSAR has hour-level revisiting capabilities, has the advantages of wide surveying and mapping area, wide viewing range, and broad application prospects. This makes the GEOSAR system unique advantages, especially in repetitive real-time observation of the ground and response to emergencies The potential of the low-orbit SAR system is indeed beyond the reach.


This is a sub-system identification:
the spaceborne SAR active calibrator developed by this project is the first multi-band spaceborne SAR active calibrator in China. The working frequency band covers the four bands of L, C, X, and Ka. It can perform normalized calibration for the subsequent 3m differential interferometric L-SAR, 20m high-orbit L-SAR, 1m C-SAR and Luojia-2 01 satellites and other satellites for normalized calibration for the direction pattern measurement of the spaceborne SAR system , The measurement of calibration constants, relative radiometric calibration, absolute radiometric calibration and image quality evaluation and other scientific tasks.
 

escobar

Brigadier
Via Hongjian Talking about 20 m resolution for geosynchronous SAR

The eyes of anti-ship ballistic missiles, the world’s first 20-meter resolution Geosar satellite successfully launched tonight​

Please, Log in or Register to view URLs content!
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Direct elevator Jump to the designated floor
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Published on 2021-02-05 00:24 Super Guerilla | Just
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Reply Reward

This post was last edited by lyman2004 at 2021-02-05 00:45

This is the world's first geosynchronous orbit SAR reconnaissance satellite. 20-meter resolution L-band. He cooperated with low-orbit SAR satellites and high-low orbit optical reconnaissance satellites to form a satellite reconnaissance network, so that the
Please, Log in or Register to view URLs content!
United States could not hide.

The detection range of a single satellite is 4000 kilometers around China, and three satellites can monitor the world.

Another technology leads the United States, and this situation will increase in the future.

An excerpt from the popular science of GEOSAR imaging principles in a paper:
GEOSAR satisfies the basic principles of SAR imaging . Geosynchronous orbit satellites are actually satellites that run repeatedly in orbits with a certain inclination and eccentricity, so that there is a relative relationship between the platform and the earth. Moving, aperture synthesis can be achieved, thereby obtaining high-quality SAR images. GEOSAR has hour-level revisiting capabilities, has the advantages of wide surveying and mapping area, wide viewing range, and broad application prospects. This makes the GEOSAR system unique advantages, especially in repetitive real-time observation of the ground and response to emergencies The potential of the low-orbit SAR system is indeed beyond the reach.

This is a sub-system identification:
the spaceborne SAR active calibrator developed by this project is the first multi-band spaceborne SAR active calibrator in China. The working frequency band covers the four bands of L, C, X, and Ka. It can perform normalized calibration for the subsequent 3m differential interferometric L-SAR, 20m high-orbit L-SAR, 1m C-SAR and Luojia-2 01 satellites and other satellites for normalized calibration for the direction pattern measurement of the spaceborne SAR system , The measurement of calibration constants, relative radiometric calibration, absolute radiometric calibration and image quality evaluation and other scientific tasks.
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,
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The GEOSAR sat not launched yet. Could be the upcoming Tianhui-3 sat.
 

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