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Jonesy

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Viewing 15 posts - 2,416 through 2,430 (of 4,319 total)
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  • in reply to: Debate,what debate. #2037792
    Jonesy
    Participant

    I think you’d stand a better chance of persuading them to build a greater number of significantly cheaper ships such as you’d get by starting the MARS programme. They would be cheaper than 2 costly destroyers but would probably take longer to build thereby safeguarding more jobs.

    Don’t get me wrong though, I do want more T45s.

    I see what you mean but the problem with MARS is the only industry supported is that of the associated metal bashers inc. MARS can be built cheaply almost anywhere and really, while it would support UK PLC somewhat, we want the ‘stimulus’ to be spread wider than that.

    Follow-on T45’s accomplish the latter as they support the tech sector as well as shipbuilding and would come, if ordered about now(ish), in time to get economy-of-scale rewards from the current build run of hulls.

    BAE have already stated that the costs of the T45 builds are coming down so hulls 7 & 8 for reasonable money, keeping the work going at BAE Cowes on the radar side, keeping RR building a few more gas turbines etc and keeping countless jocks merrily bashing steel can only be considered a good thing!.

    Not going to happen of course….but to my way of thinking its a pretty fair approximation of win-win!!!.

    in reply to: Debate,what debate. #2037812
    Jonesy
    Participant

    Like Village I’m afraid I’ve not seen the article to which you refer, but, if AFM is writing off the chances of CVF being built then they are somewhat behind the times.

    The construction of the first vessel has already started and long-lead items contracted out. The absolute last thing that this government is going to do, in the current economic climate, is pull a public investment project the size of CVF that is doing much to stimulate the local economy of the constituencies on the Prime Ministers own doorstep.

    If I were in MoD procurement I’d be banging the doors down in Whitehall pointing out the number of manufacturing jobs we could support and enhance by getting the T45 hulls 7 & 8 put back on the slate!.

    in reply to: JMSDF 16DDH #2037815
    Jonesy
    Participant

    Appreciate what you are saying of course Swerve and you are, naturally, correct. I was looking at it as more of a ‘donation’ of a surplus vessel rather than an outright export.

    If it where to retain some service life the chopper capability would certainly be beneficial in the expanding multinational MIOPS/Anti-piracy mission in the western IO region. Certainly be of more value there than beached at a breakers somehwere in SE Asia!.

    Just an idle thought exercise anyway!.;)

    in reply to: JMSDF 16DDH #2037866
    Jonesy
    Participant

    Don Chan

    18 March 2009:
    DDH-141 JDS Haruna.
    Maiduru City, Kyouto Prefecture.
    Retired, after 36 years, since 1973 February.

    Any discussion anywhere on what her fate is now or what her materiel condition might be?.

    I dimly remember that the Pakistani Navy were looking for a way of getting their SeaKings to sea, at least out into the Gulf a bit, and they do still have some current skills on steam plants. No idea if they could crew something this size, if she’s got any life left in her at this point, but the Japanese have a good reputation for looking after their ships.

    If you pull off the obsolete Mk42 mounts and the ASROC, bolt on a nice cheap OTO 76 in A position and transfer over the Harpoons from the decomming T21’s for, maybe, as many as 4 quad mounts in the space left from losing the ‘B’ gun and the pepperbox launcher. Plus, perhaps, swap the RIM-7 for one of the LY-60’s from the same source. Then you have, on the face of it, a reasonable chopper platform with some surface-surface capability for relatively little money!.

    in reply to: PLA (All Forces) Missiles 2 #1817911
    Jonesy
    Participant

    Jonesy, as I said, I was here then to just show you it’s possible, with last intention to convince you to buy the story, I know your belief is based on that you should know every detail of a systematic and complicate system, which is no any individual is cable to fully understand it even he can research solely on the ASBM from detection to tracking to guiding for his whole life. However, because the scale of such a system, China is impossible to hide such a project, so there’re tons of research papers on this project only written in Chinese.

    So how to different UAVs from manned planes? More detailed techniques can take care of more detailed scenarios. Those are payrolls’ job to take care of those details. At least I would bother myself into it further.

    OK Good answer. What I am trying to do is illustrate the, very substantial, difficulties in undertaking even the most fundamental steps in this kind of operation.

    I am not trying to say that a notional ASBM is utterly impossible. I can see a few ways in which it could be made a very, very dangerous system. Just not on the basis of the evidence indicated so far from the material thats been presented as substantiating the threat.

    There are too many components missing for the all-up system to work as advertised and the components that do exist, by themselves, are either flawed or appear make little sense. Especially when there ARE systems that China could develop which WOULD make more sense in support of this kind of weapons system that seemingly little effort is being made to get into the field.

    Anyway I’m happy to draw the line at that point.

    in reply to: PLA (All Forces) Missiles 2 #1817933
    Jonesy
    Participant

    OK

    At beyond theatre-entry ranges (you understand what theatre-entry means?) what ground based elint technology is going to assist unless the USN resort to HF radio to talk to their aircraft?. Conducting flight operations under emissions control is something that they are the best in the world at – they’ve practised it long enough.

    If I tell you that the ‘fireworks’ are Chukar drones does that give you a bit more of a clue as to what the implications are?. If not maybe some kind-hearted soul will explain it for you.

    in reply to: PLA (All Forces) Missiles 2 #1817936
    Jonesy
    Participant

    So Pinko. This all distills down to the fact that you see a 150knt plus target on OTH from a cell thats 400km sq. at 1500km downrange and is shared with a 20knt surface contact?. Thats it for you then is it…..there is an aircraft carrier in that cell and you would be willing to report up your chain of command that your space assets should be requeued to that area.

    At 1500km off a carrier is not launching a fighter every 5 minutes. More like a CAP pair every couple of hours and an E-2 at longer intervals. You have a contact plotted thats travelling at 20knts, rough minimum, to blend in with all the other 20knt merchie traffic.

    You have a space imaging asset that might get a 40km strip depth at the resolution necessary to posID a CVN from a 100,000ton supertanker of which there are plenty in those waters. If a satellite is oriented correctly for an overhead that is. Even if a satellite is just an orbit away, say a 90 minute interval, the carrier has moved 55km and is back to being just another contact in the pack until there is another flight deck event.

    That is giving you perfect operation of the OTH platform and a very dumb USN who just steam straight on in and dont take advantage of the glaring weakness of the OTH platform. That being that any air target pretty much looks like any other.

    Well, I don’t get you why u want to know it’s B-2 or F-18 or E-2?

    http://www.turbophoto.com/navy/watermark/ABqm74DroneIsFiredFr150.jpg

    Look at the above photo and think about it!. Lets see if you can connect the dots as to the implications?.

    in reply to: PLA (All Forces) Missiles 2 #1818045
    Jonesy
    Participant

    Pinko

    After CIT for each unit azimuth, the beam steered to next unit azimuth for another scan, your azimuth resolution is determined by the azimuth scan interval. So are you clear now? what’s the matter you concern no range reading when the range is part of your coordinate system?

    You are doing it again. You even stated in your post that an OTH resolution cell was roughly a 400km sq box defined by range and angular (azimuth) resolution. You have written a factually accurate description of the scanning technique but dont seem to understand that, despite it all, you arent getting a better return than your basic resolution cell allows.

    “The Jorn OTH is able to detect plane movement some 2600kms away in east timor and in a 1999 demo, a C-130J was detected 1500kms away, the detection was so precised that the plane could be seen turning into its landing approach.”

    Its amazing how a poorly phrased quote can create so much confusion.

    JORN did not detect a C-130J at 1500kms. It got returns from a resolution cell of 400km square that, somewhere in the cell, was an airborne contact doing several hundred knots. When it was checked off against what was flying in that rough area at the time the answer came back that there was a C-130J there at that time. Hence JORN ‘detected’ a C-130J at 1500km. The detection of the turn is also a bit misleading as what was detected was the signal intensity and velocity change of the contact as it changed aspect and lined up.

    Its the same as the statement that OTH can detect a B-2 at 2000km. Its technically true but, unless there is something with a conventional radar 2000km away to report back that it doesnt hold any contacts within the specific OTH cell that the contact is held within, the OTH operators have no idea that they have a hit on a B-2.

    Do you understand now?.

    in reply to: PLA (All Forces) Missiles 2 #1818053
    Jonesy
    Participant

    Jonesy mate, your entire argument is based on a few foundations that may well not hold true.

    The waters around China are very busy normally, but that is not necessarily going to be the case in the event of war.

    A simple declaration of a military exclusion zone of 5-600km around Taiwan will sort that out pretty easily. If you are civilian and want to pass through that area, there are pre-set, 5km wide channels you can use. Deviation from those zones will result in an unholy number of AShMs coming your way without warning. Sink a couple of stubborn merchants and the rest of will fall in line neat as you please.

    After that, anything outside of the civilian lanes are considered hostile and sunk on sight. See how easy it is to take a key weakness out of the equation?

    ‘Wolf

    “Sink a couple of merchants and the rest will fall in line”

    What happens if those are Japanese supertankers or South Korean car carriers…how wide do you want a conflict to spread?. Knowingly attacking non-combattants of a neutral country is called an act of war or a war crime depending on who’s view you take. You really want to have the entire Japanese and SK Navies to deal with at the same time as the US 7th Fleet?. Not smart.

    Merchants dont tend to act as you seem to want to believe they do. Tanker traffic still sailed the Gulf during the Iran-Iraq War and it was deliberately targetted there!. Merchies sailed though our TEZ around the Falklands in 82 – the RAF even tried to get us to sink one telling us it was the Arg carrier!. Wishful thinking will not get around the abiding issue that the South China Sea is not an environment that is permissive to long-range antiship missile fire be it cruise, aeroballistic or ballistic in nature.

    in reply to: PLA (All Forces) Missiles 2 #1818072
    Jonesy
    Participant

    Pinko,

    I find it amazing that you get yourself so fired up by what I write when you actually read so little of it.

    This time, the Jonesy joke of day is that the US coastal guard’s OTH radars catch bandits only by tipping off from well undercovered special agents. 😀

    OTH picks up the doppler of the aircraft. What else do you think it does?. Even if the aircraft is departing an airstrip known to be used by drug smugglers do you think that the US authorities will chase down every aircraft?. As said they will look for aircraft flying a suspect profile and that is where OTH can be useful. It is not the end-game in itself and will rely, as part of the whole system, on good intelligence as to when n event is likely. Otherwise the US DEA etc would be chasing Cessna’s all over Central America!. Apart from the targetting oversaturation factor, my point all along, what relevence is this to the China/AShBM question?.

    I never know target speed detection need “a fixed, known, point within your radars field of view”, probably my high school physics really sucks, :p

    It doesnt but, in context, if you have an airstrip known to be an operational base for drug flight operations, at a fixed location, it does make detection for OTH operators that much easier. The point being that it has little relevence to the anticarrier detection scenario as the carriers mobility makes the task significantly harder.

    Then how about Aussies’ JORN OTH radar, how it can detect so many boat people alone a vast coast line, so maybe in “the real world operational capabilities ” of JORN OTH radar, the charming Aussies JORN operators only rely on tips-off from Mermaids to catch illegals. :diablo:

    How many waves of boat people do you think there are Pinko?. The Aussies state that they have intercepted 10 vessels over the past 7 months and detained 124 illegals. So whats that 1 every 3 weeks???. Thats a really taxing environment they have there and is entirely representative of the target environment in the South China Sea isnt it?!.

    Velocity = distance/time, you don’t have a well referenced fix/know point” plus the rough angular and range resolution, so you don’t have the target’s position at any given time, so you can’t resolve the distance which is delta of position a to b. You can’t determine the distance, so you won’t get the velocity.

    How are you even discussing this when you know so little about the topic!!!!. Read how OTH works before throwing up such meaningless drivel. You dont need to have a fixed 3D reference point to determine velocity. To put it terms you seem to have some comprehension of see the VS mode available in many contempory multimode AI sets – no range readout just azimuth and velocity!.

    So what about you detect a high speed targets with radial velocity over 100 knots emerging suddenly from a deep ocean, the chances are…

    So any contact exceeding 100knts within the radar FoV is automatically indicative of the general location of an aircraft carrier is it?. You dont see the very basic problem with that for cueing targetting assets?.

    in reply to: PLA (All Forces) Missiles 2 #1818202
    Jonesy
    Participant

    You still arent getting this Pinko and, as with last time, I’m not going to take up this thread educating you on the real world operational capabilities of OTH radar.

    Suffice it to say that its quite normal, with OTH radar, to know that there is a contact with a specific doppler but not know its position beyond the rough angular and range resolution possible with the equipment as set by several well-established laws of physics with regard RF propagation.

    If you have a fixed, known, point within your radars field of view, like an island, have good intel on when shipments of drugs are being prepared and get a velocity hit on a contact thats launched from that island, staying below conventional ground radar coverage, then you have a fairly good idea that the contact is a target of interest to be chased up by additional assets. How that is relevent to the China/Anti-carrier scenario I have no idea but I have an unfortunate feeling that you will try and explain it.

    in reply to: PLA (All Forces) Missiles 2 #1818252
    Jonesy
    Participant

    Jonesy, I thought this issue had already been discussed long before?

    OTH radars do have considerable good resolution in velocity a CVN’s speed 20-30 knots, an aircraft taking off from it: several hundreds knots in speed. The contact of CVN is quite unique. It involves two different objectives moving at 2 distinctive velocities that could be discriminated by OTH radar with no difficulties. If it doesn’t work, the US coastal guard won’t use their OTH radar to detect the drug dealer’s Cessnar taking off in Caribbean islands hundreds miles away.

    So how difficult to tell apart a strange huge ship(s) with constant aircraft taking off and landing? which commercial ship will do?

    I think you have a fundamental lack of understanding as to the output that comes back from OTH. You seem to think you have a return that plots like a conventional air/surf search set. You dont get that with OTH – remember what I said about angular resolution ‘a couple of degrees’. Do the trignometry – 1.5 degrees with 1500km on a side now work out the length across the base of the triangle.

    Its not a case of lots of blips on the scope with one sending off couple of hundred knot contacts every so often!. If it were really that easy to detect carriers dont you think that the Soviets would have had a lot more success, against, US carriers off Vladivostok than they did?.

    in reply to: PLA (All Forces) Missiles 2 #1818300
    Jonesy
    Participant

    That is a very even handed approach TP. Seeings there is actually no substance to anything mentioned, apart from what you say about the potential existence of a suitable seeker – something I am willing to take your word on, its a sensible position.

    Problem is that much of what is written focuses entirely on the technology without thought to the employment.

    There is a reasonable mention of the limitations of OTH though the repeated comments of ‘algorythms’ that can get 3000yd resolutions out of the systems are fantasyland at any range beyond about 300km. There are processing techniques being written about now that allow for better bounce modelling and better wave clutter rejection but these do more for actually achieving contacts than improving resolution at theatre-entry ranges.

    So the theatre search problem is by no means solved. You have contact and velocity within a couple of degrees angular resolution and 20km or so range res. passed to you by the OTH ops team. Problem is that there are a lot of contacts in the patch of water that you are trying to find an enemy carrier in.

    Using OTH to cue in a targetting asset is the natural answer, but, how many contacts are you going to have to have your targetting assets interrogate and clear before one of them resolves as an aircraft carrier?. 200 perhaps 300 in the OTH coverage zone?. Team tactics will help but every link is extra latency in the engagement cycle. Latency is bad news when you want to drop an RV within seeker capture of the target.

    Anyway all of this furore intimates that there is anything really new about trying to hit carrier groups with ballistic missiles. The Russians had it sorted back in the bad old days. Get a wide area fix on a contact then re-enter half a dozen high-yield MRV’s from a couple of steerable bus stages in such a pattern as to saturate the potential transit zone of the surface group. If you had your targetting solution right in the 1st place then you remove a carrier group from the board. They were using OTH, spaced-based radar and serious MarPat 3 decades back and they knew that picking out a single ship and holding it through the whole engagement cycle, however big the ship, was a mugs game – hard to see whats really changed that makes people think this is now possible!.

    in reply to: General Discussion #349058
    Jonesy
    Participant

    Well Jonesy
    You ignored my point about how much land the ‘Wales’ family control…Do you know exactly how much ??
    If you want to believe ‘official’ figures then dream on boy…they are at best usually misleading or more usually ‘terminological inexactitudes’.

    Not so much ignored Baz as acknowledged but didnt see it as relevent to the bottom line. However much the royal estates bring in that money goes to the Treasury…unless you want to get into conspiracy theories about money squirreled away into offshore accounts etc.

    For the money they get it seems they are obliged to have their lives lived in a goldfish bowl and every personal conversation, even amongst old and dear friends, subject to the court of public opinion and the scorn of the chattering classes. You know what, to live my life like that, I’d want more than £12mn!.

    in reply to: Obama gaffe??? #1916823
    Jonesy
    Participant

    Well Jonesy
    You ignored my point about how much land the ‘Wales’ family control…Do you know exactly how much ??
    If you want to believe ‘official’ figures then dream on boy…they are at best usually misleading or more usually ‘terminological inexactitudes’.

    Not so much ignored Baz as acknowledged but didnt see it as relevent to the bottom line. However much the royal estates bring in that money goes to the Treasury…unless you want to get into conspiracy theories about money squirreled away into offshore accounts etc.

    For the money they get it seems they are obliged to have their lives lived in a goldfish bowl and every personal conversation, even amongst old and dear friends, subject to the court of public opinion and the scorn of the chattering classes. You know what, to live my life like that, I’d want more than £12mn!.

Viewing 15 posts - 2,416 through 2,430 (of 4,319 total)