I was using my new iPad to record video of a carpenter bee. I noticed a very high, very fast plane going by. There was no contrail. A couple minutes later, another plane went by, this time with a contrail. The time span was 6:22 to 6:26 local time. I had the iPad pointed up about 60 degrees from horizontal to the southeast. I’m about in the middle of the 78757 zip code. Is that enough information to identify these flights?
A few minutes after shooting these, I had the bright idea of using flightaware to view KAUS area activity. I noticed one plane (in green) had a trail about 5 times as long as any of the others.
Here are links to the videos. The first plane enters from bottom left and travels to upper right. It’s very hard to see unless you watch in HD. The second clip starts with the second plane already in plain view with a contrail.