In episode 1 of the TV show, Supergirl.

>! Superman meets Kara when her pod finally reaches Earth.

However Superman was just a baby when they left Krypton, so he would have no memory of Krypton.

He could have visited every pod that landed on Earth, but then why are his aunt and all the other prisoners at large? I guess they could have left some message in his pod, but Kara was supposed to be the one to protect him so this wouldn't be logical (other than a precautionary measure).

Is there any in-universe explanation of how Superman knew that Kara was is cousin? Or why he went to her pod when it crashed one Earth?