I understand ... but
To me it looks like the missile is traveling almost parallel to the horizon while still in it boost phase given the engine is lit.
In the first pic of yours the ground looses sight of the rocket as it moves into orbit.
A missile of the A5s range would have an apogee of close to 800Kms if its following a normal ballistic trajectory
which is higher than the 600Km orbit the PSLV usually leaves its satellites.
What I'm getting at is that the A5 would never have been so obviously visible from Myanmar if it was following a normal trajectory .
Have we ever had such pics coming out of Sri lanka for a PSLV launch ?
In the first pic I posted of Minuteman, the ground has not lost the sight. Its just that the snap is just that much. May be a longer exposure would have shown a much longer flight sight.
For example look at this picture. It has captured till the moment the exposure lasted. It seemed as if the projectile is entering earth surface at the end. But its not in reality. Same happened this time too. I got a video from probably WB, as people were speaking Bengali, saying that the rocket is falling down. It was true because they are looking at it going away from them.
But from Myanmar or Mizoram, they are looking at it from a different angle. So their POV and its movement is different. We could clearly see two stage separation.
As far as capturing such a image of PSLV from Sri Lanka is concerned, did anyone there ever cared to capture any picture of launch?