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  1. #201
    Lt General
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    Not since John Ledingham was a captain..
    German 1: Private Schnutz, I have bad news for you.
    German 2: Private? I am a general!
    German 1: That is the bad news.

  2. #202
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    The RAF are putting a new radar head back at Saxa Vord in the Shetlands.

    Bearing in mind it’s going to be a fixed remote head on a very remote site that they already own and probably still has all the power, comms etc infrastructure intact....it’s costing UK£10 million.

    https://www.gov.uk/government/news/n...thern-airspace

    It’s reported as being a AN/TPS-77 which would have a range of up to 470km/250nm

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  4. #203
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    A Giraffe is the radar equivalent of a man standing on a small hill....

  5. #204
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    Quote Originally Posted by GoneToTheCanner View Post
    A Giraffe is the radar equivalent of a man standing on a small hill....
    depends on which version

    The UK are buying them now

  6. #205
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    Last edited by DeV; 30th May 2018 at 19:44.

  7. #206
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    Quote Originally Posted by GoneToTheCanner View Post
    A Giraffe is the radar equivalent of a man standing on a small hill....
    Giraffe was bought to provide guidance for FLAADS, it's a point/local AD system and Giraffe in an appropriate radar for that task - the surveillance radars are the three big AN/TPS-77 radars on the mountain tops, and they can see waaaaaaaaayyyyyyy the hell out into the South Atlantic.

  8. #207
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    Aren't they a variant of the big phased array radars on American ships?

  9. #208
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    Quote Originally Posted by GoneToTheCanner View Post
    Aren't they a variant of the big phased array radars on American ships?
    Dunno,but if you get too close you'll end up with funny looking kids....

  10. #209
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    Quote Originally Posted by pym View Post


    Line of sight for that loc at 2500ft & 5000ft respectively
    How do you do that and what does it show?

  11. #210
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    Quote Originally Posted by DeV View Post
    How do you do that and what does it show?
    I can't actually remember the site - I'll dig it up tomorrow.

    Basically it's a line of sight calculator. If I am in X location, I can see something at 2500ft up to Y distance, or at 5000ft up to Z distance. The higher a long range search radar is located, the further it can see.

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  13. #211
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    Quote Originally Posted by pym View Post
    I can't actually remember the site - I'll dig it up tomorrow.

    Basically it's a line of sight calculator. If I am in X location, I can see something at 2500ft up to Y distance, or at 5000ft up to Z distance. The higher a long range search radar is located, the further it can see.
    I’m guessing the red areas are blind zones?
    So the red triangles are???

  14. #212
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    Quote Originally Posted by DeV View Post
    I’m guessing the red areas are blind zones?
    So the red triangles are???
    I expect the triangles are mountain peaks visible from that location.

    Re: red area, actually I think the opposite - line of sight down to (almost) surface level.

    Re: spots with reduced range- SSW due to Lug, ESE due to Djouce.

    So you can have a lovely long range search radar, but wherever you put it, it will have reduced coverage at lower levels in certain lobes - unless you stick a rotating dish on a jet at 35,000ft.
    Last edited by pym; 30th May 2018 at 23:34.

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  16. #213
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    Modern radars are much better at filtering out genuine known "blockers" like mountains, hills and tall infrastructure from spurious returns. Operators can select or deselect any object that the radar can see and they can select a bottom or lowest level so that the radar will, for example near an urban area, will not show objects below 200 feet, because of all the clutter you'd get. In the case of civil air traffic, given the proliferation of transponders these days, they can filter out VFR traffic from IFR, filter according to speed, height, direction, climbing, descending and so on. Even in Ireland, with all our hills and mountains, its very hard to hide even from commercial civil radar. There are very few true radar blackspots on the island.

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