I will post a video of my process and show you that the two images are exactly the same, they were masked and placed on two separate backgrounds. They are in exactly the same attitude in allegedly two different shots. Just not remotely possible. It will take me a couple of weeks to get my computer running video. I have been doing this kind of work for more than twenty years and can spot a composite in seconds. You made a lot of mistakes and omissions, but what you got right you did very skillfully, I like your attempt at the jet blast covering the road and how you distorted the road centre lines, but you did not get that quite right as the work you did shows what would be seen with the engines at idle. The exhaust cowlings are closed in your photo indicating this jet is at full thrust, at its AGL the background would show a lot of motion blur as I attempted to show in my edit.
There's more and I will be glad to build my case with the upcoming video once I get the bugs out of my PC. Take a look at the cockpit in both images, how likely would it be to have exactly the same orientation in two separate flyby's? The photos according to the background were supposedly taken from two different places with a point of view that by default would be different and the jet at a different attitude, yet you tell me that this is not a composite using the same jet image on two different backgrounds. I can scale both the jet images and overlap them perfectly to show this aircraft photo was copied and pasted. You did make an attempt to disguise by changing the size of one of the images, but in all other respects it is an exact replica and will perfectly overlap the copy.
In the 3D world, when you have a fixed point of view, a 3D object when moved or rotated slightly, will appear to change shape, an illusion, but the reality is, some surfaces will be obscured by others that rotate to the foreground. A case in example is the cockpit in your photo that is partially obscured by the canard, what are the chances that they would appear exactly the same in two separate shots in two separate flyby's? I'm sure you will have a lot of support from the forum and I'm likely to get a lot of hate mail over this, but I'm equally sure my observations are right. If I'm wrong, as I already said, I will humbly apologise and eat crow.