What kind of radar is this?

[My-Analogous]

Oh good ! So not a substandard rip-off.

Yes we saw lot of INDIAN high standard products like kavari engine, Arjun Tank etc.

 

[gambit]

so, what are those white circle things are for and their displacements?

Am waiting for the 'Chinese physics' practitioners to take the lead on this one. I have posted plenty on basic principles that cleared up a lot of confusion on a lot of technical issues but have yet to see such a lead based upon 'Chinese physics'.

But I will say this...It looks similar, but not even 50%, to a device I saw a looooooong time ago in another professional life. The image is blurry when up close but it looks like those circle thingies are embedded instead of merely being placed atop the surface. Those little structures that surrounded them hinted -- and I have no problems being wrong on this -- at being absorbers, like the larger example here...

So if they are absorbers -- big IF -- then what for?

Let us see what our expert practitioners in 'Chinese physics' are willing to put forth, shall we?

 

[A.Muqeet khan]

and what are absorbers

 

[unicorn]

@gambit
You mean to say feeders (horn antennas)?

 

[gambit]

and what are absorbers

EM absorbers.

 

[no_name]

There are EM absorbers which can be deformed like a rubber stress ball and return to it's shape. They leave no black carbon marks nor shreds easily and you don't need to worry about bumping into them. They are more expensive though, and probably performs slightly inferior.

 

[Cheetah786]

?

photo taken at CASIC

Navigation, Surface and Underwater Positioning Systems

 

[qwerrty]

ok, i found the original source of thr photo. it was posted by some frenchie guy at astronautique forum.

Le 19 Juin, un article apparu dans le journal de l'aérospatial chinois nous donne quelques détails sur l'un des 3 instruments du système d'amarrage chinois - le radar micro-ondes.

Développé par l'Institut de recherche n°25 du groupe CASIC, le chef de projet est un docteur qui est diplômé en France. Le radar pèse 12 kg et sa portée théorique est de 160km.

Lors de la mission Shenzhou-8, ce radar a démontré sa grande précision et la fiabilité, et a détecté TG-1 à 217km de distance.

Cette fois-ci dans la mission Shenzhou-9, ce radar continue à prouver sa performance. Le 18 Juin à 9h33, peu après l'activation de ce radar micro-ondes sur Shenzhou-9, il a détecté sa cible, TG-1, à une distance de 224km. 11h47, le vaisseau Shenzhou-9 se rapproche de TG-1 et passe en navigation autonome, les données envoyées par ce radar sont toujours stables. 12h41, au point de stationnement de 5km, le radar continu à fonctionner correctement avant de passer la main au radar de laser et aux capteurs CCD.

Quelques photos de cette jeune équipe de recherche...


google translate:

On June 19, an article appeared in the Journal of the Chinese aerospace gives us some details on one of three instruments of Chinese mooring system - radar microwave.

Developed by the Research Institute No. 25 CASIC Group, the project manager is a doctor who graduated in France. The radar weighs 12 kg and its theoretical range is 160km.

During the Shenzhou-8, this radar has demonstrated its high accuracy and reliability, and TG-1 was detected at 217km distance.

This time in the Shenzhou-9, the radar continues to demonstrate its performance. On June 18 at 9:33, shortly after the activation of this radar microwaves on Shenzhou-9, it detected the target, TG-1, a distance of 224km. 11:47, the Shenzhou-9 is similar to TG-1 and switches to autonomous navigation, the data sent by the radar are always stable. 12:41, to the point of parking 5km, radar continued to function properly before going out to the radar laser and CCD sensors.

Some photos of this young research team ...

 

[gambit]

ok, i found the original source of thr photo. it was posted by some frenchie guy at astronautique forum.

You mean here...???

[Mission] Shenzhou-9 & TG-1 - Page 16

It is supposedly a radar designed to assist in spacecraft docking.

CASIC Microwave Docking Radar ,the Technological Breakthrough behind Precision Docking

But am going even more basic than usage. What make the mating of two large bodies, in space or on Earth, so difficult that it would require the assistance of microwave sensors? That is what I was trying to get at. There are rectangular openings on the centers of those discs that looks very much like waveguide openings.

As for what I suspected to be EM absorbers surrounding those 'discs'...

IEEE Xplore - Abstract Page

Author(s): Zhi Xu
Radar & Avionics Inst. of AVIC, Wuxi, China
Xuequan Yan ; Zhenghe Feng ; Shuxi Gong ; Qizhong Liu

Diffraction effects of the edge region within the antenna array aperture have been discussed with the numerical simulation and measurement in the antenna array monostatic Radar Cross Section (RCS) analysis.

Antenna edge diffraction effects are usually not an issue -- UNLESS there are multiple antennas in an array. Keep in mind that an antenna is not an array even though the two are often casually used interchangeably, even by professionals in the field. An array is a collection of discrete antennas that are supposed to work in concert with each other for some reasons.

So now there are further clues, let us see how fares the 'Chinese physics' experts at guessing what next, although given their absence so far, we should not have much hope at their contribution. The Chinese engineers in the photos undoubtedly works with real physics.

 

[amalakas]

You mean here...???

[Mission] Shenzhou-9 & TG-1 - Page 16

It is supposedly a radar designed to assist in spacecraft docking.

CASIC Microwave Docking Radar ,the Technological Breakthrough behind Precision Docking

But am going even more basic than usage. What make the mating of two large bodies, in space or on Earth, so difficult that it would require the assistance of microwave sensors? That is what I was trying to get at. There are rectangular openings on the centers of those discs that looks very much like waveguide openings.

As for what I suspected to be EM absorbers surrounding those 'discs'...

IEEE Xplore - Abstract Page

Antenna edge diffraction effects are usually not an issue -- UNLESS there are multiple antennas in an array. Keep in mind that an antenna is not an array even though the two are often casually used interchangeably, even by professionals in the field. An array is a collection of discrete antennas that are supposed to work in concert with each other for some reasons.

So now there are further clues, let us see how fares the 'Chinese physics' experts at guessing what next, although given their absence so far, we should not have much hope at their contribution. The Chinese engineers in the photos undoubtedly works with real physics.

My impression is that the waveguides are arranged to help with orientation. There was a project like this is ESA a while ago, can't find the funding details.

 

[qwerrty]

But am going even more basic than usage. What make the mating of two large bodies, in space or on Earth, so difficult that it would require the assistance of microwave sensors? That is what I was trying to get at. There are rectangular openings on the centers of those discs that looks very much like waveguide openings.
O

most probably for super accurate data for precise docking and maybe anti-satellite test in disguise too..

 

[Alfa-Fighter]

Yes we saw lot of INDIAN high standard products like kavari engine, Arjun Tank etc.

the same is also designed , Stealth Ships , Missiles etc....

 

[sayyieth]

do not know