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Posted

 

Hi all,

 

I made these for my squad to help them visualise the scan patterns of the AWG-9 and just how little of the sky the antenna is actually covering at any given moment and give them impetus to start being a bit more proactive with asking Jester to slew their scan patterns around. I have attached here in case any one else finds them useful.

 

 

F-14_AWG-9_Antenna_Az.thumb.PNG.9375ef9367d47c6fc0836fc124556808.PNG

 

 

wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==F-14_AWG-9_Antenna_El_1-Bar.thumb.PNG.032bee36e8ca0c723d2d26313e91404b.PNG

wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==F-14_AWG-9_Antenna_El_2-Bar.thumb.PNG.62577d8c0f0f836e64e571080a01d480.PNGwAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==F-14_AWG-9_Antenna_El_4-Bar.thumb.PNG.e68c26ae1987792bc01255a46235d877.PNG

wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==

F-14_AWG-9_Antenna_Az_Oblique.thumb.PNG.fcffa1075e17359112f7e7e4672e0d59.PNG

  • Like 1
Posted

Awesome diagrams mate. I remember doodling on office papers during lunch time, back when we didn't have TWS AUTO, trying to do basic trigonometry and point Jester the right way! :D

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Posted

Thanks chaps. Like you dalan, I could have done with these 18 months ago, but if they're of use to anyone else now, so much the better.

 

I'd love to be able to make a dynamic 3D model with adjustable mode, elevation, azimuth, and bar scan inputs with an animated antenna icon so that you can really start to visualise just how the radar is scanning over time - that would really help those new to modern jets to get a grip on how their radar behaves and what it cannot see, as I get the feeling that some assume that a radar = 180* Situational Awareness in front of your aircraft and are surprised when it doesn't meet that expectation.

Posted

Even though I dont fly the 14 there are really nice, this is really what newer players need to know. Knowing the limitations of your radar is crucial.

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  • 1 month later...
Posted

I'm only reading this on my phone but i'm sure your calculations are incorrect. I think you may have forgotten to double up the altitude after working out the trig.

 

For example you have 8300ft @25nm 4 bar scan of 6.3 degrees, this would be tan 3.15deg x 25nmi = 1.375nmi x 6076ft = 8359ft but that is only half the scan area (3.15deg) so multiply by 2 gives +/- 8359ft (16,718ft). Quite a big difference.

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Posted
I'm only reading this on my phone but i'm sure your calculations are incorrect. I think you may have forgotten to double up the altitude after working out the trig.

 

For example you have 8300ft @25nm 4 bar scan of 6.3 degrees, this would be tan 3.15deg x 25nmi = 1.375nmi x 6076ft = 8359ft but that is only half the scan area (3.15deg) so multiply by 2 gives +/- 8359ft (16,718ft). Quite a big difference.

 

Hey Frostie,

 

Thanks for the heads-up; I wish I could say I was talented enough to do that mathematics myself, however, I cheated! I got the figures from here: https://flyandwire.com/2019/05/18/f-14-rio-awg-9-antenna-elevation-study-part-ii/

 

However I will review and see if they require amendment.

 

Posted

 

Hey Frostie,

 

Thanks for the heads-up; I wish I could say I was talented enough to do that mathematics myself, however, I cheated! I got the figures from here: https://flyandwire.com/2019/05/18/f-14-rio-awg-9-antenna-elevation-study-part-ii/

 

However I will review and see if they require amendment.

 

Looks like Karon's math is good too. You just got it wrong. Good catch, Frostie.

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  • 4 weeks later...
Posted

Hi all, I updated the original post to now include images that show corrected data for the elevation altitude coverage; it was indeed that I had taken the tabled data as verbaitim, unaware that it represented a +/- value. Apologies to all for any confusion this may have caused and thanks again to Frostie for his help in identifying the inaccuracy.

  • Like 2
Posted

Re-updated as something had not caused the png rendering to be very clear so now they are clearer; also added an 30 degree off boresight azimuth diagram to illustrate that scan patterns are not tied to boresight.

Posted
Re-updated as something had not caused the png rendering to be very clear so now they are clearer; also added an 30 degree off boresight azimuth diagram to illustrate that scan patterns are not tied to boresight.

 

So OP diagrams are correct now, right? perfect sir, much appreciated.

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Posted

Awesome diagrams DD_Fenrir! :thumbup:

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