PLA AEW&C, SIGINT, EW and MPA thread

[Blitzo]

Y-8GX6 participating in an ASW exercise alongside SSF ships

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[szbd]

You should realize that "weapons-quality track" is NOT the same thing as "terminal illumination", which is what you are talking about. The SPY-1 is S-band and also provides "weapons-quality" tracks, but yet still has to hand off to the X-band SPG-62 FCR to provide the end-game terminal illumination. In fact CEC depends primarily upon SPY-1 S-band radars for tracking and yet is also credited with weapons-quality tracks. Weapons-quality simply means the discrimination is high enough to provide guidance for weapons enough to make it to the end game where onboard or offboard radars can take over for terminal illumination (or in the case of the SM-2, the IR sensor). This is quite different from something like Yagi antennas that also operate in the UHF or VHF bands but yet are totally incapable of providing weapons guidance, and is better described as "early warning" radars.

S-band wavelength is about twice as X-band. It's totally different from UHF, don't mix them up. UHF's discrimination can never be high enough.

RCS depends on wavelength to a certain extent. Apertures/openings, saw-tooth edges, and RCS paint will certainly be tailored to specific wavelengths, usually X- and S-band radars, but stealth shaping also significantly involves deflecting waves such that they do not return signal to the original emitter. This will work on any wavelength/frequency whether it's X-band or VHF-band. Also, I made no mention of accuracy having to do with RCS, which is something that you brought up with the Tomahawk's size.

For the same thing at same angle, RCS depends on wavelength, that's my point.

 

[Iron Man]

S-band wavelength is about twice as X-band. It's totally different from UHF, don't mix them up. UHF's discrimination can never be high enough.

Your claim here does not match up to the US military's claim. While UHF-band can never be high enough for terminal illumination (and neither can S-band), they both can certainly be high enough to direct missile engagements all the way up until the end game. And yet some other UHF-band radars cannot do this (e.g. Yagi antennas). This clearly indicates that radar target discrimination is not purely a matter of frequency.

 

[2=GT]

China Marine Surveillance MA60H

 

[SamuraiBlue]

Your claim here does not match up to the US military's claim. While UHF-band can never be high enough for terminal illumination (and neither can S-band), they both can certainly be high enough to direct missile engagements all the way up until the end game. And yet some other UHF-band radars cannot do this (e.g. Yagi antennas). This clearly indicates that radar target discrimination is not purely a matter of frequency.

Aughhh, have you ever seen a Yagi antenna?
It's basically the same as your TV antenna which focuses on sensitivity but poor in directionality or focus of direction. It may give you the general direction but sure not enough to give you the location of target which is required for target engagement since the missile has a much narrower window for acquisition of target.

 

[Iron Man]

Aughhh, have you ever seen a Yagi antenna?
It's basically the same as your TV antenna which focuses on sensitivity but poor in directionality or focus of direction. It may give you the general direction but sure not enough to give you the location of target which is required for target engagement since the missile has a much narrower window for acquisition of target.

What are you even talking about? Read my post more carefully before you beat on a straw man.

 

[SamuraiBlue]

What are you even talking about? Read my post more carefully before you beat on a straw man.

The devil is in the details.

A missile with terminal radar only has about a 20Km range or less with a 10 degrees arc while a Yagi radar has around 45 degree arc with a 90Km range.
Even if the Yagi radar detects a target it can only give you a general detection which in no means can be used as a terminal illumination since as the missile closes in the radar emission will be lost as you move closer into the target due to difference in width of arc.

If you do not understand get yourself a compass draw a 45 degree arc with a diameter of 10 cm.
Then select a random point within the arc and draw a 10 degree arc with a 2 cm diameter and look at the mass that does not over lap. That is the area that the missile had lost acquisition of target.

 

[Iron Man]

The devil is in the details.

A missile with terminal radar only has about a 20Km range or less with a 10 degrees arc while a Yagi radar has around 45 degree arc with a 90Km range.
Even if the Yagi radar detects a target it can only give you a general detection which in no means can be used as a terminal illumination since as the missile closes in the radar emission will be lost as you move closer into the target due to difference in width of arc.

If you do not understand get yourself a compass draw a 45 degree arc with a diameter of 10 cm.
Then select a random point within the arc and draw a 10 degree arc with a 2 cm diameter and look at the mass that does not over lap. That is the area that the missile had lost acquisition of target.

Go ahead and point out WHERE in ANY of my posts I stated that a Yagi antenna can be used for terminal illumination, genius.

 

[Deino]

China Marine Surveillance MA60H

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Nice ... but can anyone explain the difference for their operating services??

This latest one MA-60H B-5002 is said for the China Maritime Surveillance CMS

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... und earlier another one was reportedly delivered to the State Oceanic Administration SOA

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But both are not related to the China Coast Guard??? Or am I wrong ?

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[antiterror13]

Go ahead and point out WHERE in ANY of my posts I stated that a Yagi antenna can be used for terminal illumination, genius.

he ( @SamuraiBlue ) may just copy and paste after googling it .. without even reading the posts he was replaying ... often happened to me as well ... no surprise here